From d0e84e76937b109f80eb352bae09d879a78995a3 Mon Sep 17 00:00:00 2001
From: Dominik Thoennes <dominik.thoennes@fau.de>
Date: Mon, 6 Jul 2020 12:13:39 +0200
Subject: [PATCH] update external json lib
---
src/core/extern/json.hpp | 20763 +++++++++++++++++++++++++------------
1 file changed, 14064 insertions(+), 6699 deletions(-)
diff --git a/src/core/extern/json.hpp b/src/core/extern/json.hpp
index 6b6655af8..cc822a543 100644
--- a/src/core/extern/json.hpp
+++ b/src/core/extern/json.hpp
@@ -1,11 +1,12 @@
/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++
-| | |__ | | | | | | version 3.1.2
+| | |__ | | | | | | version 3.8.0
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
-Copyright (c) 2013-2018 Niels Lohmann <http://nlohmann.me>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2013-2019 Niels Lohmann <http://nlohmann.me>.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
@@ -26,2166 +27,8410 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
-#ifndef NLOHMANN_JSON_HPP
-#define NLOHMANN_JSON_HPP
+#ifndef INCLUDE_NLOHMANN_JSON_HPP_
+#define INCLUDE_NLOHMANN_JSON_HPP_
#define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 1
-#define NLOHMANN_JSON_VERSION_PATCH 2
+#define NLOHMANN_JSON_VERSION_MINOR 8
+#define NLOHMANN_JSON_VERSION_PATCH 0
#include <algorithm> // all_of, find, for_each
#include <cassert> // assert
-#include <ciso646> // and, not, or
#include <cstddef> // nullptr_t, ptrdiff_t, size_t
#include <functional> // hash, less
#include <initializer_list> // initializer_list
#include <iosfwd> // istream, ostream
-#include <iterator> // iterator_traits, random_access_iterator_tag
+#include <iterator> // random_access_iterator_tag
+#include <memory> // unique_ptr
#include <numeric> // accumulate
#include <string> // string, stoi, to_string
#include <utility> // declval, forward, move, pair, swap
+#include <vector> // vector
-// #include <nlohmann/json_fwd.hpp>
-#ifndef NLOHMANN_JSON_FWD_HPP
-#define NLOHMANN_JSON_FWD_HPP
+// #include <nlohmann/adl_serializer.hpp>
-#include <cstdint> // int64_t, uint64_t
+
+#include <utility>
+
+// #include <nlohmann/detail/conversions/from_json.hpp>
+
+
+#include <algorithm> // transform
+#include <array> // array
+#include <forward_list> // forward_list
+#include <iterator> // inserter, front_inserter, end
#include <map> // map
-#include <memory> // allocator
#include <string> // string
-#include <vector> // vector
+#include <tuple> // tuple, make_tuple
+#include <type_traits> // is_arithmetic, is_same, is_enum, underlying_type, is_convertible
+#include <unordered_map> // unordered_map
+#include <utility> // pair, declval
+#include <valarray> // valarray
+
+// #include <nlohmann/detail/boolean_operators.hpp>
+
+
+// Header <ciso646> is removed in C++20.
+// See <https://github.com/nlohmann/json/issues/2089> for more information.
+
+#if __cplusplus <= 201703L
+ #include <ciso646> // and, not, or
+#endif
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+
+#include <exception> // exception
+#include <stdexcept> // runtime_error
+#include <string> // to_string
+
+// #include <nlohmann/detail/input/position_t.hpp>
+
+
+#include <cstddef> // size_t
-/*!
-@brief namespace for Niels Lohmann
-@see https://github.com/nlohmann
-@since version 1.0.0
-*/
namespace nlohmann
{
-/*!
-@brief default JSONSerializer template argument
+namespace detail
+{
+/// struct to capture the start position of the current token
+struct position_t
+{
+ /// the total number of characters read
+ std::size_t chars_read_total = 0;
+ /// the number of characters read in the current line
+ std::size_t chars_read_current_line = 0;
+ /// the number of lines read
+ std::size_t lines_read = 0;
-This serializer ignores the template arguments and uses ADL
-([argument-dependent lookup](http://en.cppreference.com/w/cpp/language/adl))
-for serialization.
-*/
-template<typename = void, typename = void>
-struct adl_serializer;
+ /// conversion to size_t to preserve SAX interface
+ constexpr operator size_t() const
+ {
+ return chars_read_total;
+ }
+};
-template<template<typename U, typename V, typename... Args> class ObjectType =
- std::map,
- template<typename U, typename... Args> class ArrayType = std::vector,
- class StringType = std::string, class BooleanType = bool,
- class NumberIntegerType = std::int64_t,
- class NumberUnsignedType = std::uint64_t,
- class NumberFloatType = double,
- template<typename U> class AllocatorType = std::allocator,
- template<typename T, typename SFINAE = void> class JSONSerializer =
- adl_serializer>
-class basic_json;
+} // namespace detail
+} // namespace nlohmann
-/*!
-@brief JSON Pointer
+// #include <nlohmann/detail/macro_scope.hpp>
-A JSON pointer defines a string syntax for identifying a specific value
-within a JSON document. It can be used with functions `at` and
-`operator[]`. Furthermore, JSON pointers are the base for JSON patches.
-@sa [RFC 6901](https://tools.ietf.org/html/rfc6901)
+#include <utility> // pair
+// #include <nlohmann/thirdparty/hedley/hedley.hpp>
+/* Hedley - https://nemequ.github.io/hedley
+ * Created by Evan Nemerson <evan@nemerson.com>
+ *
+ * To the extent possible under law, the author(s) have dedicated all
+ * copyright and related and neighboring rights to this software to
+ * the public domain worldwide. This software is distributed without
+ * any warranty.
+ *
+ * For details, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+ * SPDX-License-Identifier: CC0-1.0
+ */
+
+#if !defined(JSON_HEDLEY_VERSION) || (JSON_HEDLEY_VERSION < 13)
+#if defined(JSON_HEDLEY_VERSION)
+ #undef JSON_HEDLEY_VERSION
+#endif
+#define JSON_HEDLEY_VERSION 13
-@since version 2.0.0
-*/
-template<typename BasicJsonType>
-class json_pointer;
+#if defined(JSON_HEDLEY_STRINGIFY_EX)
+ #undef JSON_HEDLEY_STRINGIFY_EX
+#endif
+#define JSON_HEDLEY_STRINGIFY_EX(x) #x
-/*!
-@brief default JSON class
+#if defined(JSON_HEDLEY_STRINGIFY)
+ #undef JSON_HEDLEY_STRINGIFY
+#endif
+#define JSON_HEDLEY_STRINGIFY(x) JSON_HEDLEY_STRINGIFY_EX(x)
-This type is the default specialization of the @ref basic_json class which
-uses the standard template types.
+#if defined(JSON_HEDLEY_CONCAT_EX)
+ #undef JSON_HEDLEY_CONCAT_EX
+#endif
+#define JSON_HEDLEY_CONCAT_EX(a,b) a##b
-@since version 1.0.0
-*/
-using json = basic_json<>;
-}
+#if defined(JSON_HEDLEY_CONCAT)
+ #undef JSON_HEDLEY_CONCAT
+#endif
+#define JSON_HEDLEY_CONCAT(a,b) JSON_HEDLEY_CONCAT_EX(a,b)
+#if defined(JSON_HEDLEY_CONCAT3_EX)
+ #undef JSON_HEDLEY_CONCAT3_EX
#endif
+#define JSON_HEDLEY_CONCAT3_EX(a,b,c) a##b##c
-// #include <nlohmann/detail/macro_scope.hpp>
+#if defined(JSON_HEDLEY_CONCAT3)
+ #undef JSON_HEDLEY_CONCAT3
+#endif
+#define JSON_HEDLEY_CONCAT3(a,b,c) JSON_HEDLEY_CONCAT3_EX(a,b,c)
+#if defined(JSON_HEDLEY_VERSION_ENCODE)
+ #undef JSON_HEDLEY_VERSION_ENCODE
+#endif
+#define JSON_HEDLEY_VERSION_ENCODE(major,minor,revision) (((major) * 1000000) + ((minor) * 1000) + (revision))
-// This file contains all internal macro definitions
-// You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them
+#if defined(JSON_HEDLEY_VERSION_DECODE_MAJOR)
+ #undef JSON_HEDLEY_VERSION_DECODE_MAJOR
+#endif
+#define JSON_HEDLEY_VERSION_DECODE_MAJOR(version) ((version) / 1000000)
-// exclude unsupported compilers
-#if defined(__clang__)
- #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
- #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
- #endif
-#elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
- #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
- #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
- #endif
+#if defined(JSON_HEDLEY_VERSION_DECODE_MINOR)
+ #undef JSON_HEDLEY_VERSION_DECODE_MINOR
#endif
+#define JSON_HEDLEY_VERSION_DECODE_MINOR(version) (((version) % 1000000) / 1000)
-// disable float-equal warnings on GCC/clang
-#if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__)
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wfloat-equal"
+#if defined(JSON_HEDLEY_VERSION_DECODE_REVISION)
+ #undef JSON_HEDLEY_VERSION_DECODE_REVISION
#endif
+#define JSON_HEDLEY_VERSION_DECODE_REVISION(version) ((version) % 1000)
-// disable documentation warnings on clang
-#if defined(__clang__)
- #pragma GCC diagnostic push
- #pragma GCC diagnostic ignored "-Wdocumentation"
+#if defined(JSON_HEDLEY_GNUC_VERSION)
+ #undef JSON_HEDLEY_GNUC_VERSION
+#endif
+#if defined(__GNUC__) && defined(__GNUC_PATCHLEVEL__)
+ #define JSON_HEDLEY_GNUC_VERSION JSON_HEDLEY_VERSION_ENCODE(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
+#elif defined(__GNUC__)
+ #define JSON_HEDLEY_GNUC_VERSION JSON_HEDLEY_VERSION_ENCODE(__GNUC__, __GNUC_MINOR__, 0)
#endif
-// allow for portable deprecation warnings
-#if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__)
- #define JSON_DEPRECATED __attribute__((deprecated))
-#elif defined(_MSC_VER)
- #define JSON_DEPRECATED __declspec(deprecated)
+#if defined(JSON_HEDLEY_GNUC_VERSION_CHECK)
+ #undef JSON_HEDLEY_GNUC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_GNUC_VERSION)
+ #define JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_GNUC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
#else
- #define JSON_DEPRECATED
+ #define JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch) (0)
#endif
-// allow to disable exceptions
-#if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND)) && !defined(JSON_NOEXCEPTION)
- #define JSON_THROW(exception) throw exception
- #define JSON_TRY try
- #define JSON_CATCH(exception) catch(exception)
-#else
- #define JSON_THROW(exception) std::abort()
- #define JSON_TRY if(true)
- #define JSON_CATCH(exception) if(false)
+#if defined(JSON_HEDLEY_MSVC_VERSION)
+ #undef JSON_HEDLEY_MSVC_VERSION
+#endif
+#if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 140000000)
+ #define JSON_HEDLEY_MSVC_VERSION JSON_HEDLEY_VERSION_ENCODE(_MSC_FULL_VER / 10000000, (_MSC_FULL_VER % 10000000) / 100000, (_MSC_FULL_VER % 100000) / 100)
+#elif defined(_MSC_FULL_VER)
+ #define JSON_HEDLEY_MSVC_VERSION JSON_HEDLEY_VERSION_ENCODE(_MSC_FULL_VER / 1000000, (_MSC_FULL_VER % 1000000) / 10000, (_MSC_FULL_VER % 10000) / 10)
+#elif defined(_MSC_VER)
+ #define JSON_HEDLEY_MSVC_VERSION JSON_HEDLEY_VERSION_ENCODE(_MSC_VER / 100, _MSC_VER % 100, 0)
#endif
-// override exception macros
-#if defined(JSON_THROW_USER)
- #undef JSON_THROW
- #define JSON_THROW JSON_THROW_USER
+#if defined(JSON_HEDLEY_MSVC_VERSION_CHECK)
+ #undef JSON_HEDLEY_MSVC_VERSION_CHECK
#endif
-#if defined(JSON_TRY_USER)
- #undef JSON_TRY
- #define JSON_TRY JSON_TRY_USER
+#if !defined(_MSC_VER)
+ #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (0)
+#elif defined(_MSC_VER) && (_MSC_VER >= 1400)
+ #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (_MSC_FULL_VER >= ((major * 10000000) + (minor * 100000) + (patch)))
+#elif defined(_MSC_VER) && (_MSC_VER >= 1200)
+ #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (_MSC_FULL_VER >= ((major * 1000000) + (minor * 10000) + (patch)))
+#else
+ #define JSON_HEDLEY_MSVC_VERSION_CHECK(major,minor,patch) (_MSC_VER >= ((major * 100) + (minor)))
#endif
-#if defined(JSON_CATCH_USER)
- #undef JSON_CATCH
- #define JSON_CATCH JSON_CATCH_USER
+
+#if defined(JSON_HEDLEY_INTEL_VERSION)
+ #undef JSON_HEDLEY_INTEL_VERSION
+#endif
+#if defined(__INTEL_COMPILER) && defined(__INTEL_COMPILER_UPDATE)
+ #define JSON_HEDLEY_INTEL_VERSION JSON_HEDLEY_VERSION_ENCODE(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, __INTEL_COMPILER_UPDATE)
+#elif defined(__INTEL_COMPILER)
+ #define JSON_HEDLEY_INTEL_VERSION JSON_HEDLEY_VERSION_ENCODE(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, 0)
#endif
-// manual branch prediction
-#if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__)
- #define JSON_LIKELY(x) __builtin_expect(!!(x), 1)
- #define JSON_UNLIKELY(x) __builtin_expect(!!(x), 0)
+#if defined(JSON_HEDLEY_INTEL_VERSION_CHECK)
+ #undef JSON_HEDLEY_INTEL_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_INTEL_VERSION)
+ #define JSON_HEDLEY_INTEL_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_INTEL_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
#else
- #define JSON_LIKELY(x) x
- #define JSON_UNLIKELY(x) x
+ #define JSON_HEDLEY_INTEL_VERSION_CHECK(major,minor,patch) (0)
#endif
-// C++ language standard detection
-#if (defined(__cplusplus) && __cplusplus >= 201703L) || (defined(_HAS_CXX17) && _HAS_CXX17 == 1) // fix for issue #464
- #define JSON_HAS_CPP_17
- #define JSON_HAS_CPP_14
-#elif (defined(__cplusplus) && __cplusplus >= 201402L) || (defined(_HAS_CXX14) && _HAS_CXX14 == 1)
- #define JSON_HAS_CPP_14
+#if defined(JSON_HEDLEY_PGI_VERSION)
+ #undef JSON_HEDLEY_PGI_VERSION
+#endif
+#if defined(__PGI) && defined(__PGIC__) && defined(__PGIC_MINOR__) && defined(__PGIC_PATCHLEVEL__)
+ #define JSON_HEDLEY_PGI_VERSION JSON_HEDLEY_VERSION_ENCODE(__PGIC__, __PGIC_MINOR__, __PGIC_PATCHLEVEL__)
#endif
-// Ugly macros to avoid uglier copy-paste when specializing basic_json. They
-// may be removed in the future once the class is split.
+#if defined(JSON_HEDLEY_PGI_VERSION_CHECK)
+ #undef JSON_HEDLEY_PGI_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_PGI_VERSION)
+ #define JSON_HEDLEY_PGI_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_PGI_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_PGI_VERSION_CHECK(major,minor,patch) (0)
+#endif
-#define NLOHMANN_BASIC_JSON_TPL_DECLARATION \
- template<template<typename, typename, typename...> class ObjectType, \
- template<typename, typename...> class ArrayType, \
- class StringType, class BooleanType, class NumberIntegerType, \
- class NumberUnsignedType, class NumberFloatType, \
- template<typename> class AllocatorType, \
- template<typename, typename = void> class JSONSerializer>
+#if defined(JSON_HEDLEY_SUNPRO_VERSION)
+ #undef JSON_HEDLEY_SUNPRO_VERSION
+#endif
+#if defined(__SUNPRO_C) && (__SUNPRO_C > 0x1000)
+ #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((((__SUNPRO_C >> 16) & 0xf) * 10) + ((__SUNPRO_C >> 12) & 0xf), (((__SUNPRO_C >> 8) & 0xf) * 10) + ((__SUNPRO_C >> 4) & 0xf), (__SUNPRO_C & 0xf) * 10)
+#elif defined(__SUNPRO_C)
+ #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((__SUNPRO_C >> 8) & 0xf, (__SUNPRO_C >> 4) & 0xf, (__SUNPRO_C) & 0xf)
+#elif defined(__SUNPRO_CC) && (__SUNPRO_CC > 0x1000)
+ #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((((__SUNPRO_CC >> 16) & 0xf) * 10) + ((__SUNPRO_CC >> 12) & 0xf), (((__SUNPRO_CC >> 8) & 0xf) * 10) + ((__SUNPRO_CC >> 4) & 0xf), (__SUNPRO_CC & 0xf) * 10)
+#elif defined(__SUNPRO_CC)
+ #define JSON_HEDLEY_SUNPRO_VERSION JSON_HEDLEY_VERSION_ENCODE((__SUNPRO_CC >> 8) & 0xf, (__SUNPRO_CC >> 4) & 0xf, (__SUNPRO_CC) & 0xf)
+#endif
-#define NLOHMANN_BASIC_JSON_TPL \
- basic_json<ObjectType, ArrayType, StringType, BooleanType, \
- NumberIntegerType, NumberUnsignedType, NumberFloatType, \
- AllocatorType, JSONSerializer>
+#if defined(JSON_HEDLEY_SUNPRO_VERSION_CHECK)
+ #undef JSON_HEDLEY_SUNPRO_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_SUNPRO_VERSION)
+ #define JSON_HEDLEY_SUNPRO_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_SUNPRO_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_SUNPRO_VERSION_CHECK(major,minor,patch) (0)
+#endif
-/*!
-@brief Helper to determine whether there's a key_type for T.
+#if defined(JSON_HEDLEY_EMSCRIPTEN_VERSION)
+ #undef JSON_HEDLEY_EMSCRIPTEN_VERSION
+#endif
+#if defined(__EMSCRIPTEN__)
+ #define JSON_HEDLEY_EMSCRIPTEN_VERSION JSON_HEDLEY_VERSION_ENCODE(__EMSCRIPTEN_major__, __EMSCRIPTEN_minor__, __EMSCRIPTEN_tiny__)
+#endif
-This helper is used to tell associative containers apart from other containers
-such as sequence containers. For instance, `std::map` passes the test as it
-contains a `mapped_type`, whereas `std::vector` fails the test.
+#if defined(JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK)
+ #undef JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_EMSCRIPTEN_VERSION)
+ #define JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_EMSCRIPTEN_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK(major,minor,patch) (0)
+#endif
-@sa http://stackoverflow.com/a/7728728/266378
-@since version 1.0.0, overworked in version 2.0.6
-*/
-#define NLOHMANN_JSON_HAS_HELPER(type) \
- template<typename T> struct has_##type { \
- private: \
- template<typename U, typename = typename U::type> \
- static int detect(U &&); \
- static void detect(...); \
- public: \
- static constexpr bool value = \
- std::is_integral<decltype(detect(std::declval<T>()))>::value; \
- }
+#if defined(JSON_HEDLEY_ARM_VERSION)
+ #undef JSON_HEDLEY_ARM_VERSION
+#endif
+#if defined(__CC_ARM) && defined(__ARMCOMPILER_VERSION)
+ #define JSON_HEDLEY_ARM_VERSION JSON_HEDLEY_VERSION_ENCODE(__ARMCOMPILER_VERSION / 1000000, (__ARMCOMPILER_VERSION % 1000000) / 10000, (__ARMCOMPILER_VERSION % 10000) / 100)
+#elif defined(__CC_ARM) && defined(__ARMCC_VERSION)
+ #define JSON_HEDLEY_ARM_VERSION JSON_HEDLEY_VERSION_ENCODE(__ARMCC_VERSION / 1000000, (__ARMCC_VERSION % 1000000) / 10000, (__ARMCC_VERSION % 10000) / 100)
+#endif
-// #include <nlohmann/detail/meta.hpp>
+#if defined(JSON_HEDLEY_ARM_VERSION_CHECK)
+ #undef JSON_HEDLEY_ARM_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_ARM_VERSION)
+ #define JSON_HEDLEY_ARM_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_ARM_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_ARM_VERSION_CHECK(major,minor,patch) (0)
+#endif
+#if defined(JSON_HEDLEY_IBM_VERSION)
+ #undef JSON_HEDLEY_IBM_VERSION
+#endif
+#if defined(__ibmxl__)
+ #define JSON_HEDLEY_IBM_VERSION JSON_HEDLEY_VERSION_ENCODE(__ibmxl_version__, __ibmxl_release__, __ibmxl_modification__)
+#elif defined(__xlC__) && defined(__xlC_ver__)
+ #define JSON_HEDLEY_IBM_VERSION JSON_HEDLEY_VERSION_ENCODE(__xlC__ >> 8, __xlC__ & 0xff, (__xlC_ver__ >> 8) & 0xff)
+#elif defined(__xlC__)
+ #define JSON_HEDLEY_IBM_VERSION JSON_HEDLEY_VERSION_ENCODE(__xlC__ >> 8, __xlC__ & 0xff, 0)
+#endif
-#include <ciso646> // not
-#include <cstddef> // size_t
-#include <limits> // numeric_limits
-#include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
-#include <utility> // declval
+#if defined(JSON_HEDLEY_IBM_VERSION_CHECK)
+ #undef JSON_HEDLEY_IBM_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_IBM_VERSION)
+ #define JSON_HEDLEY_IBM_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_IBM_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_IBM_VERSION_CHECK(major,minor,patch) (0)
+#endif
-// #include <nlohmann/json_fwd.hpp>
+#if defined(JSON_HEDLEY_TI_VERSION)
+ #undef JSON_HEDLEY_TI_VERSION
+#endif
+#if \
+ defined(__TI_COMPILER_VERSION__) && \
+ ( \
+ defined(__TMS470__) || defined(__TI_ARM__) || \
+ defined(__MSP430__) || \
+ defined(__TMS320C2000__) \
+ )
+#if (__TI_COMPILER_VERSION__ >= 16000000)
+ #define JSON_HEDLEY_TI_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
+#endif
-// #include <nlohmann/detail/macro_scope.hpp>
+#if defined(JSON_HEDLEY_TI_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_VERSION)
+ #define JSON_HEDLEY_TI_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_VERSION_CHECK(major,minor,patch) (0)
+#endif
+#if defined(JSON_HEDLEY_TI_CL2000_VERSION)
+ #undef JSON_HEDLEY_TI_CL2000_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__TMS320C2000__)
+ #define JSON_HEDLEY_TI_CL2000_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
-namespace nlohmann
-{
-/*!
-@brief detail namespace with internal helper functions
+#if defined(JSON_HEDLEY_TI_CL2000_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_CL2000_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL2000_VERSION)
+ #define JSON_HEDLEY_TI_CL2000_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL2000_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_CL2000_VERSION_CHECK(major,minor,patch) (0)
+#endif
-This namespace collects functions that should not be exposed,
-implementations of some @ref basic_json methods, and meta-programming helpers.
+#if defined(JSON_HEDLEY_TI_CL430_VERSION)
+ #undef JSON_HEDLEY_TI_CL430_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__MSP430__)
+ #define JSON_HEDLEY_TI_CL430_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
-@since version 2.1.0
-*/
-namespace detail
-{
-/////////////
-// helpers //
-/////////////
+#if defined(JSON_HEDLEY_TI_CL430_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_CL430_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL430_VERSION)
+ #define JSON_HEDLEY_TI_CL430_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL430_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_CL430_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template<typename> struct is_basic_json : std::false_type {};
+#if defined(JSON_HEDLEY_TI_ARMCL_VERSION)
+ #undef JSON_HEDLEY_TI_ARMCL_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && (defined(__TMS470__) || defined(__TI_ARM__))
+ #define JSON_HEDLEY_TI_ARMCL_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
-NLOHMANN_BASIC_JSON_TPL_DECLARATION
-struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
+#if defined(JSON_HEDLEY_TI_ARMCL_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_ARMCL_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_ARMCL_VERSION)
+ #define JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_ARMCL_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(major,minor,patch) (0)
+#endif
-// alias templates to reduce boilerplate
-template<bool B, typename T = void>
-using enable_if_t = typename std::enable_if<B, T>::type;
+#if defined(JSON_HEDLEY_TI_CL6X_VERSION)
+ #undef JSON_HEDLEY_TI_CL6X_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__TMS320C6X__)
+ #define JSON_HEDLEY_TI_CL6X_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
-template<typename T>
-using uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
+#if defined(JSON_HEDLEY_TI_CL6X_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_CL6X_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL6X_VERSION)
+ #define JSON_HEDLEY_TI_CL6X_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL6X_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_CL6X_VERSION_CHECK(major,minor,patch) (0)
+#endif
-// implementation of C++14 index_sequence and affiliates
-// source: https://stackoverflow.com/a/32223343
-template<std::size_t... Ints>
-struct index_sequence
-{
- using type = index_sequence;
- using value_type = std::size_t;
- static constexpr std::size_t size() noexcept
- {
- return sizeof...(Ints);
- }
-};
+#if defined(JSON_HEDLEY_TI_CL7X_VERSION)
+ #undef JSON_HEDLEY_TI_CL7X_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__C7000__)
+ #define JSON_HEDLEY_TI_CL7X_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
-template<class Sequence1, class Sequence2>
-struct merge_and_renumber;
+#if defined(JSON_HEDLEY_TI_CL7X_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_CL7X_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CL7X_VERSION)
+ #define JSON_HEDLEY_TI_CL7X_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CL7X_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_CL7X_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template<std::size_t... I1, std::size_t... I2>
-struct merge_and_renumber<index_sequence<I1...>, index_sequence<I2...>>
- : index_sequence < I1..., (sizeof...(I1) + I2)... > {};
-
-template<std::size_t N>
-struct make_index_sequence
- : merge_and_renumber < typename make_index_sequence < N / 2 >::type,
- typename make_index_sequence < N - N / 2 >::type > {};
+#if defined(JSON_HEDLEY_TI_CLPRU_VERSION)
+ #undef JSON_HEDLEY_TI_CLPRU_VERSION
+#endif
+#if defined(__TI_COMPILER_VERSION__) && defined(__PRU__)
+ #define JSON_HEDLEY_TI_CLPRU_VERSION JSON_HEDLEY_VERSION_ENCODE(__TI_COMPILER_VERSION__ / 1000000, (__TI_COMPILER_VERSION__ % 1000000) / 1000, (__TI_COMPILER_VERSION__ % 1000))
+#endif
-template<> struct make_index_sequence<0> : index_sequence<> {};
-template<> struct make_index_sequence<1> : index_sequence<0> {};
+#if defined(JSON_HEDLEY_TI_CLPRU_VERSION_CHECK)
+ #undef JSON_HEDLEY_TI_CLPRU_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TI_CLPRU_VERSION)
+ #define JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TI_CLPRU_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template<typename... Ts>
-using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
+#if defined(JSON_HEDLEY_CRAY_VERSION)
+ #undef JSON_HEDLEY_CRAY_VERSION
+#endif
+#if defined(_CRAYC)
+ #if defined(_RELEASE_PATCHLEVEL)
+ #define JSON_HEDLEY_CRAY_VERSION JSON_HEDLEY_VERSION_ENCODE(_RELEASE_MAJOR, _RELEASE_MINOR, _RELEASE_PATCHLEVEL)
+ #else
+ #define JSON_HEDLEY_CRAY_VERSION JSON_HEDLEY_VERSION_ENCODE(_RELEASE_MAJOR, _RELEASE_MINOR, 0)
+ #endif
+#endif
-/*
-Implementation of two C++17 constructs: conjunction, negation. This is needed
-to avoid evaluating all the traits in a condition
+#if defined(JSON_HEDLEY_CRAY_VERSION_CHECK)
+ #undef JSON_HEDLEY_CRAY_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_CRAY_VERSION)
+ #define JSON_HEDLEY_CRAY_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_CRAY_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_CRAY_VERSION_CHECK(major,minor,patch) (0)
+#endif
-For example: not std::is_same<void, T>::value and has_value_type<T>::value
-will not compile when T = void (on MSVC at least). Whereas
-conjunction<negation<std::is_same<void, T>>, has_value_type<T>>::value will
-stop evaluating if negation<...>::value == false
+#if defined(JSON_HEDLEY_IAR_VERSION)
+ #undef JSON_HEDLEY_IAR_VERSION
+#endif
+#if defined(__IAR_SYSTEMS_ICC__)
+ #if __VER__ > 1000
+ #define JSON_HEDLEY_IAR_VERSION JSON_HEDLEY_VERSION_ENCODE((__VER__ / 1000000), ((__VER__ / 1000) % 1000), (__VER__ % 1000))
+ #else
+ #define JSON_HEDLEY_IAR_VERSION JSON_HEDLEY_VERSION_ENCODE(VER / 100, __VER__ % 100, 0)
+ #endif
+#endif
-Please note that those constructs must be used with caution, since symbols can
-become very long quickly (which can slow down compilation and cause MSVC
-internal compiler errors). Only use it when you have to (see example ahead).
-*/
-template<class...> struct conjunction : std::true_type {};
-template<class B1> struct conjunction<B1> : B1 {};
-template<class B1, class... Bn>
-struct conjunction<B1, Bn...> : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
+#if defined(JSON_HEDLEY_IAR_VERSION_CHECK)
+ #undef JSON_HEDLEY_IAR_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_IAR_VERSION)
+ #define JSON_HEDLEY_IAR_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_IAR_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_IAR_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template<class B> struct negation : std::integral_constant<bool, not B::value> {};
+#if defined(JSON_HEDLEY_TINYC_VERSION)
+ #undef JSON_HEDLEY_TINYC_VERSION
+#endif
+#if defined(__TINYC__)
+ #define JSON_HEDLEY_TINYC_VERSION JSON_HEDLEY_VERSION_ENCODE(__TINYC__ / 1000, (__TINYC__ / 100) % 10, __TINYC__ % 100)
+#endif
-// dispatch utility (taken from ranges-v3)
-template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
-template<> struct priority_tag<0> {};
+#if defined(JSON_HEDLEY_TINYC_VERSION_CHECK)
+ #undef JSON_HEDLEY_TINYC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_TINYC_VERSION)
+ #define JSON_HEDLEY_TINYC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_TINYC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_TINYC_VERSION_CHECK(major,minor,patch) (0)
+#endif
-////////////////////////
-// has_/is_ functions //
-////////////////////////
+#if defined(JSON_HEDLEY_DMC_VERSION)
+ #undef JSON_HEDLEY_DMC_VERSION
+#endif
+#if defined(__DMC__)
+ #define JSON_HEDLEY_DMC_VERSION JSON_HEDLEY_VERSION_ENCODE(__DMC__ >> 8, (__DMC__ >> 4) & 0xf, __DMC__ & 0xf)
+#endif
-// source: https://stackoverflow.com/a/37193089/4116453
+#if defined(JSON_HEDLEY_DMC_VERSION_CHECK)
+ #undef JSON_HEDLEY_DMC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_DMC_VERSION)
+ #define JSON_HEDLEY_DMC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_DMC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_DMC_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template <typename T, typename = void>
-struct is_complete_type : std::false_type {};
+#if defined(JSON_HEDLEY_COMPCERT_VERSION)
+ #undef JSON_HEDLEY_COMPCERT_VERSION
+#endif
+#if defined(__COMPCERT_VERSION__)
+ #define JSON_HEDLEY_COMPCERT_VERSION JSON_HEDLEY_VERSION_ENCODE(__COMPCERT_VERSION__ / 10000, (__COMPCERT_VERSION__ / 100) % 100, __COMPCERT_VERSION__ % 100)
+#endif
-template <typename T>
-struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
+#if defined(JSON_HEDLEY_COMPCERT_VERSION_CHECK)
+ #undef JSON_HEDLEY_COMPCERT_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_COMPCERT_VERSION)
+ #define JSON_HEDLEY_COMPCERT_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_COMPCERT_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_COMPCERT_VERSION_CHECK(major,minor,patch) (0)
+#endif
-NLOHMANN_JSON_HAS_HELPER(mapped_type);
-NLOHMANN_JSON_HAS_HELPER(key_type);
-NLOHMANN_JSON_HAS_HELPER(value_type);
-NLOHMANN_JSON_HAS_HELPER(iterator);
+#if defined(JSON_HEDLEY_PELLES_VERSION)
+ #undef JSON_HEDLEY_PELLES_VERSION
+#endif
+#if defined(__POCC__)
+ #define JSON_HEDLEY_PELLES_VERSION JSON_HEDLEY_VERSION_ENCODE(__POCC__ / 100, __POCC__ % 100, 0)
+#endif
-template<bool B, class RealType, class CompatibleObjectType>
-struct is_compatible_object_type_impl : std::false_type {};
+#if defined(JSON_HEDLEY_PELLES_VERSION_CHECK)
+ #undef JSON_HEDLEY_PELLES_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_PELLES_VERSION)
+ #define JSON_HEDLEY_PELLES_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_PELLES_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_PELLES_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template<class RealType, class CompatibleObjectType>
-struct is_compatible_object_type_impl<true, RealType, CompatibleObjectType>
-{
- static constexpr auto value =
- std::is_constructible<typename RealType::key_type, typename CompatibleObjectType::key_type>::value and
- std::is_constructible<typename RealType::mapped_type, typename CompatibleObjectType::mapped_type>::value;
-};
+#if defined(JSON_HEDLEY_GCC_VERSION)
+ #undef JSON_HEDLEY_GCC_VERSION
+#endif
+#if \
+ defined(JSON_HEDLEY_GNUC_VERSION) && \
+ !defined(__clang__) && \
+ !defined(JSON_HEDLEY_INTEL_VERSION) && \
+ !defined(JSON_HEDLEY_PGI_VERSION) && \
+ !defined(JSON_HEDLEY_ARM_VERSION) && \
+ !defined(JSON_HEDLEY_TI_VERSION) && \
+ !defined(JSON_HEDLEY_TI_ARMCL_VERSION) && \
+ !defined(JSON_HEDLEY_TI_CL430_VERSION) && \
+ !defined(JSON_HEDLEY_TI_CL2000_VERSION) && \
+ !defined(JSON_HEDLEY_TI_CL6X_VERSION) && \
+ !defined(JSON_HEDLEY_TI_CL7X_VERSION) && \
+ !defined(JSON_HEDLEY_TI_CLPRU_VERSION) && \
+ !defined(__COMPCERT__)
+ #define JSON_HEDLEY_GCC_VERSION JSON_HEDLEY_GNUC_VERSION
+#endif
-template<class BasicJsonType, class CompatibleObjectType>
-struct is_compatible_object_type
-{
- static auto constexpr value = is_compatible_object_type_impl <
- conjunction<negation<std::is_same<void, CompatibleObjectType>>,
- has_mapped_type<CompatibleObjectType>,
- has_key_type<CompatibleObjectType>>::value,
- typename BasicJsonType::object_t, CompatibleObjectType >::value;
-};
+#if defined(JSON_HEDLEY_GCC_VERSION_CHECK)
+ #undef JSON_HEDLEY_GCC_VERSION_CHECK
+#endif
+#if defined(JSON_HEDLEY_GCC_VERSION)
+ #define JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch) (JSON_HEDLEY_GCC_VERSION >= JSON_HEDLEY_VERSION_ENCODE(major, minor, patch))
+#else
+ #define JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch) (0)
+#endif
-template<typename BasicJsonType, typename T>
-struct is_basic_json_nested_type
-{
- static auto constexpr value = std::is_same<T, typename BasicJsonType::iterator>::value or
- std::is_same<T, typename BasicJsonType::const_iterator>::value or
- std::is_same<T, typename BasicJsonType::reverse_iterator>::value or
- std::is_same<T, typename BasicJsonType::const_reverse_iterator>::value;
-};
+#if defined(JSON_HEDLEY_HAS_ATTRIBUTE)
+ #undef JSON_HEDLEY_HAS_ATTRIBUTE
+#endif
+#if defined(__has_attribute)
+ #define JSON_HEDLEY_HAS_ATTRIBUTE(attribute) __has_attribute(attribute)
+#else
+ #define JSON_HEDLEY_HAS_ATTRIBUTE(attribute) (0)
+#endif
-template<class BasicJsonType, class CompatibleArrayType>
-struct is_compatible_array_type
-{
- static auto constexpr value =
- conjunction<negation<std::is_same<void, CompatibleArrayType>>,
- negation<is_compatible_object_type<
- BasicJsonType, CompatibleArrayType>>,
- negation<std::is_constructible<typename BasicJsonType::string_t,
- CompatibleArrayType>>,
- negation<is_basic_json_nested_type<BasicJsonType, CompatibleArrayType>>,
- has_value_type<CompatibleArrayType>,
- has_iterator<CompatibleArrayType>>::value;
-};
+#if defined(JSON_HEDLEY_GNUC_HAS_ATTRIBUTE)
+ #undef JSON_HEDLEY_GNUC_HAS_ATTRIBUTE
+#endif
+#if defined(__has_attribute)
+ #define JSON_HEDLEY_GNUC_HAS_ATTRIBUTE(attribute,major,minor,patch) __has_attribute(attribute)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
-template<bool, typename, typename>
-struct is_compatible_integer_type_impl : std::false_type {};
+#if defined(JSON_HEDLEY_GCC_HAS_ATTRIBUTE)
+ #undef JSON_HEDLEY_GCC_HAS_ATTRIBUTE
+#endif
+#if defined(__has_attribute)
+ #define JSON_HEDLEY_GCC_HAS_ATTRIBUTE(attribute,major,minor,patch) __has_attribute(attribute)
+#else
+ #define JSON_HEDLEY_GCC_HAS_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-template<typename RealIntegerType, typename CompatibleNumberIntegerType>
-struct is_compatible_integer_type_impl<true, RealIntegerType, CompatibleNumberIntegerType>
-{
- // is there an assert somewhere on overflows?
- using RealLimits = std::numeric_limits<RealIntegerType>;
- using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
+#if defined(JSON_HEDLEY_HAS_CPP_ATTRIBUTE)
+ #undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE
+#endif
+#if \
+ defined(__has_cpp_attribute) && \
+ defined(__cplusplus) && \
+ (!defined(JSON_HEDLEY_SUNPRO_VERSION) || JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0))
+ #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE(attribute) __has_cpp_attribute(attribute)
+#else
+ #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE(attribute) (0)
+#endif
- static constexpr auto value =
- std::is_constructible<RealIntegerType, CompatibleNumberIntegerType>::value and
- CompatibleLimits::is_integer and
- RealLimits::is_signed == CompatibleLimits::is_signed;
-};
+#if defined(JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS)
+ #undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS
+#endif
+#if !defined(__cplusplus) || !defined(__has_cpp_attribute)
+ #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(ns,attribute) (0)
+#elif \
+ !defined(JSON_HEDLEY_PGI_VERSION) && \
+ !defined(JSON_HEDLEY_IAR_VERSION) && \
+ (!defined(JSON_HEDLEY_SUNPRO_VERSION) || JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0)) && \
+ (!defined(JSON_HEDLEY_MSVC_VERSION) || JSON_HEDLEY_MSVC_VERSION_CHECK(19,20,0))
+ #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(ns,attribute) JSON_HEDLEY_HAS_CPP_ATTRIBUTE(ns::attribute)
+#else
+ #define JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(ns,attribute) (0)
+#endif
-template<typename RealIntegerType, typename CompatibleNumberIntegerType>
-struct is_compatible_integer_type
-{
- static constexpr auto value =
- is_compatible_integer_type_impl <
- std::is_integral<CompatibleNumberIntegerType>::value and
- not std::is_same<bool, CompatibleNumberIntegerType>::value,
- RealIntegerType, CompatibleNumberIntegerType > ::value;
-};
+#if defined(JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE)
+ #undef JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE
+#endif
+#if defined(__has_cpp_attribute) && defined(__cplusplus)
+ #define JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) __has_cpp_attribute(attribute)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
-// trait checking if JSONSerializer<T>::from_json(json const&, udt&) exists
-template<typename BasicJsonType, typename T>
-struct has_from_json
-{
- private:
- // also check the return type of from_json
- template<typename U, typename = enable_if_t<std::is_same<void, decltype(uncvref_t<U>::from_json(
- std::declval<BasicJsonType>(), std::declval<T&>()))>::value>>
- static int detect(U&&);
- static void detect(...);
+#if defined(JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE)
+ #undef JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE
+#endif
+#if defined(__has_cpp_attribute) && defined(__cplusplus)
+ #define JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) __has_cpp_attribute(attribute)
+#else
+ #define JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
- public:
- static constexpr bool value = std::is_integral<decltype(
- detect(std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
-};
+#if defined(JSON_HEDLEY_HAS_BUILTIN)
+ #undef JSON_HEDLEY_HAS_BUILTIN
+#endif
+#if defined(__has_builtin)
+ #define JSON_HEDLEY_HAS_BUILTIN(builtin) __has_builtin(builtin)
+#else
+ #define JSON_HEDLEY_HAS_BUILTIN(builtin) (0)
+#endif
-// This trait checks if JSONSerializer<T>::from_json(json const&) exists
-// this overload is used for non-default-constructible user-defined-types
-template<typename BasicJsonType, typename T>
-struct has_non_default_from_json
-{
- private:
- template <
- typename U,
- typename = enable_if_t<std::is_same<
- T, decltype(uncvref_t<U>::from_json(std::declval<BasicJsonType>()))>::value >>
- static int detect(U&&);
- static void detect(...);
+#if defined(JSON_HEDLEY_GNUC_HAS_BUILTIN)
+ #undef JSON_HEDLEY_GNUC_HAS_BUILTIN
+#endif
+#if defined(__has_builtin)
+ #define JSON_HEDLEY_GNUC_HAS_BUILTIN(builtin,major,minor,patch) __has_builtin(builtin)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_BUILTIN(builtin,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
- public:
- static constexpr bool value = std::is_integral<decltype(detect(
- std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
-};
+#if defined(JSON_HEDLEY_GCC_HAS_BUILTIN)
+ #undef JSON_HEDLEY_GCC_HAS_BUILTIN
+#endif
+#if defined(__has_builtin)
+ #define JSON_HEDLEY_GCC_HAS_BUILTIN(builtin,major,minor,patch) __has_builtin(builtin)
+#else
+ #define JSON_HEDLEY_GCC_HAS_BUILTIN(builtin,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-// This trait checks if BasicJsonType::json_serializer<T>::to_json exists
-template<typename BasicJsonType, typename T>
-struct has_to_json
-{
- private:
- template<typename U, typename = decltype(uncvref_t<U>::to_json(
- std::declval<BasicJsonType&>(), std::declval<T>()))>
- static int detect(U&&);
- static void detect(...);
+#if defined(JSON_HEDLEY_HAS_FEATURE)
+ #undef JSON_HEDLEY_HAS_FEATURE
+#endif
+#if defined(__has_feature)
+ #define JSON_HEDLEY_HAS_FEATURE(feature) __has_feature(feature)
+#else
+ #define JSON_HEDLEY_HAS_FEATURE(feature) (0)
+#endif
- public:
- static constexpr bool value = std::is_integral<decltype(detect(
- std::declval<typename BasicJsonType::template json_serializer<T, void>>()))>::value;
-};
+#if defined(JSON_HEDLEY_GNUC_HAS_FEATURE)
+ #undef JSON_HEDLEY_GNUC_HAS_FEATURE
+#endif
+#if defined(__has_feature)
+ #define JSON_HEDLEY_GNUC_HAS_FEATURE(feature,major,minor,patch) __has_feature(feature)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_FEATURE(feature,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
-template <typename BasicJsonType, typename CompatibleCompleteType>
-struct is_compatible_complete_type
-{
- static constexpr bool value =
- not std::is_base_of<std::istream, CompatibleCompleteType>::value and
- not is_basic_json<CompatibleCompleteType>::value and
- not is_basic_json_nested_type<BasicJsonType, CompatibleCompleteType>::value and
- has_to_json<BasicJsonType, CompatibleCompleteType>::value;
-};
+#if defined(JSON_HEDLEY_GCC_HAS_FEATURE)
+ #undef JSON_HEDLEY_GCC_HAS_FEATURE
+#endif
+#if defined(__has_feature)
+ #define JSON_HEDLEY_GCC_HAS_FEATURE(feature,major,minor,patch) __has_feature(feature)
+#else
+ #define JSON_HEDLEY_GCC_HAS_FEATURE(feature,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-template <typename BasicJsonType, typename CompatibleType>
-struct is_compatible_type
- : conjunction<is_complete_type<CompatibleType>,
- is_compatible_complete_type<BasicJsonType, CompatibleType>>
-{
-};
+#if defined(JSON_HEDLEY_HAS_EXTENSION)
+ #undef JSON_HEDLEY_HAS_EXTENSION
+#endif
+#if defined(__has_extension)
+ #define JSON_HEDLEY_HAS_EXTENSION(extension) __has_extension(extension)
+#else
+ #define JSON_HEDLEY_HAS_EXTENSION(extension) (0)
+#endif
-// taken from ranges-v3
-template<typename T>
-struct static_const
-{
- static constexpr T value{};
-};
+#if defined(JSON_HEDLEY_GNUC_HAS_EXTENSION)
+ #undef JSON_HEDLEY_GNUC_HAS_EXTENSION
+#endif
+#if defined(__has_extension)
+ #define JSON_HEDLEY_GNUC_HAS_EXTENSION(extension,major,minor,patch) __has_extension(extension)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_EXTENSION(extension,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
-template<typename T>
-constexpr T static_const<T>::value;
-}
-}
+#if defined(JSON_HEDLEY_GCC_HAS_EXTENSION)
+ #undef JSON_HEDLEY_GCC_HAS_EXTENSION
+#endif
+#if defined(__has_extension)
+ #define JSON_HEDLEY_GCC_HAS_EXTENSION(extension,major,minor,patch) __has_extension(extension)
+#else
+ #define JSON_HEDLEY_GCC_HAS_EXTENSION(extension,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-// #include <nlohmann/detail/exceptions.hpp>
+#if defined(JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE)
+ #undef JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE
+#endif
+#if defined(__has_declspec_attribute)
+ #define JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE(attribute) __has_declspec_attribute(attribute)
+#else
+ #define JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE(attribute) (0)
+#endif
+#if defined(JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE)
+ #undef JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE
+#endif
+#if defined(__has_declspec_attribute)
+ #define JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) __has_declspec_attribute(attribute)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
-#include <exception> // exception
-#include <stdexcept> // runtime_error
-#include <string> // to_string
+#if defined(JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE)
+ #undef JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE
+#endif
+#if defined(__has_declspec_attribute)
+ #define JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) __has_declspec_attribute(attribute)
+#else
+ #define JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE(attribute,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-namespace nlohmann
-{
-namespace detail
-{
-////////////////
-// exceptions //
-////////////////
+#if defined(JSON_HEDLEY_HAS_WARNING)
+ #undef JSON_HEDLEY_HAS_WARNING
+#endif
+#if defined(__has_warning)
+ #define JSON_HEDLEY_HAS_WARNING(warning) __has_warning(warning)
+#else
+ #define JSON_HEDLEY_HAS_WARNING(warning) (0)
+#endif
-/*!
-@brief general exception of the @ref basic_json class
+#if defined(JSON_HEDLEY_GNUC_HAS_WARNING)
+ #undef JSON_HEDLEY_GNUC_HAS_WARNING
+#endif
+#if defined(__has_warning)
+ #define JSON_HEDLEY_GNUC_HAS_WARNING(warning,major,minor,patch) __has_warning(warning)
+#else
+ #define JSON_HEDLEY_GNUC_HAS_WARNING(warning,major,minor,patch) JSON_HEDLEY_GNUC_VERSION_CHECK(major,minor,patch)
+#endif
-This class is an extension of `std::exception` objects with a member @a id for
-exception ids. It is used as the base class for all exceptions thrown by the
-@ref basic_json class. This class can hence be used as "wildcard" to catch
-exceptions.
+#if defined(JSON_HEDLEY_GCC_HAS_WARNING)
+ #undef JSON_HEDLEY_GCC_HAS_WARNING
+#endif
+#if defined(__has_warning)
+ #define JSON_HEDLEY_GCC_HAS_WARNING(warning,major,minor,patch) __has_warning(warning)
+#else
+ #define JSON_HEDLEY_GCC_HAS_WARNING(warning,major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-Subclasses:
-- @ref parse_error for exceptions indicating a parse error
-- @ref invalid_iterator for exceptions indicating errors with iterators
-- @ref type_error for exceptions indicating executing a member function with
- a wrong type
-- @ref out_of_range for exceptions indicating access out of the defined range
-- @ref other_error for exceptions indicating other library errors
+/* JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_ is for
+ HEDLEY INTERNAL USE ONLY. API subject to change without notice. */
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_)
+ #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_
+#endif
+#if defined(__cplusplus)
+# if JSON_HEDLEY_HAS_WARNING("-Wc++98-compat")
+# if JSON_HEDLEY_HAS_WARNING("-Wc++17-extensions")
+# define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(xpr) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("clang diagnostic ignored \"-Wc++98-compat\"") \
+ _Pragma("clang diagnostic ignored \"-Wc++17-extensions\"") \
+ xpr \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+# else
+# define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(xpr) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("clang diagnostic ignored \"-Wc++98-compat\"") \
+ xpr \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+# endif
+# endif
+#endif
+#if !defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(x) x
+#endif
-@internal
-@note To have nothrow-copy-constructible exceptions, we internally use
- `std::runtime_error` which can cope with arbitrary-length error messages.
- Intermediate strings are built with static functions and then passed to
- the actual constructor.
-@endinternal
+#if defined(JSON_HEDLEY_CONST_CAST)
+ #undef JSON_HEDLEY_CONST_CAST
+#endif
+#if defined(__cplusplus)
+# define JSON_HEDLEY_CONST_CAST(T, expr) (const_cast<T>(expr))
+#elif \
+ JSON_HEDLEY_HAS_WARNING("-Wcast-qual") || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,6,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+# define JSON_HEDLEY_CONST_CAST(T, expr) (__extension__ ({ \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL \
+ ((T) (expr)); \
+ JSON_HEDLEY_DIAGNOSTIC_POP \
+ }))
+#else
+# define JSON_HEDLEY_CONST_CAST(T, expr) ((T) (expr))
+#endif
-@liveexample{The following code shows how arbitrary library exceptions can be
-caught.,exception}
+#if defined(JSON_HEDLEY_REINTERPRET_CAST)
+ #undef JSON_HEDLEY_REINTERPRET_CAST
+#endif
+#if defined(__cplusplus)
+ #define JSON_HEDLEY_REINTERPRET_CAST(T, expr) (reinterpret_cast<T>(expr))
+#else
+ #define JSON_HEDLEY_REINTERPRET_CAST(T, expr) ((T) (expr))
+#endif
-@since version 3.0.0
-*/
-class exception : public std::exception
-{
- public:
- /// returns the explanatory string
- const char* what() const noexcept override
- {
- return m.what();
- }
+#if defined(JSON_HEDLEY_STATIC_CAST)
+ #undef JSON_HEDLEY_STATIC_CAST
+#endif
+#if defined(__cplusplus)
+ #define JSON_HEDLEY_STATIC_CAST(T, expr) (static_cast<T>(expr))
+#else
+ #define JSON_HEDLEY_STATIC_CAST(T, expr) ((T) (expr))
+#endif
- /// the id of the exception
- const int id;
+#if defined(JSON_HEDLEY_CPP_CAST)
+ #undef JSON_HEDLEY_CPP_CAST
+#endif
+#if defined(__cplusplus)
+# if JSON_HEDLEY_HAS_WARNING("-Wold-style-cast")
+# define JSON_HEDLEY_CPP_CAST(T, expr) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("clang diagnostic ignored \"-Wold-style-cast\"") \
+ ((T) (expr)) \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+# elif JSON_HEDLEY_IAR_VERSION_CHECK(8,3,0)
+# define JSON_HEDLEY_CPP_CAST(T, expr) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("diag_suppress=Pe137") \
+ JSON_HEDLEY_DIAGNOSTIC_POP \
+# else
+# define JSON_HEDLEY_CPP_CAST(T, expr) ((T) (expr))
+# endif
+#else
+# define JSON_HEDLEY_CPP_CAST(T, expr) (expr)
+#endif
- protected:
- exception(int id_, const char* what_arg) : id(id_), m(what_arg) {}
+#if \
+ (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
+ defined(__clang__) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(18,4,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,7,0) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(2,0,1) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,1,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,0,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+ JSON_HEDLEY_CRAY_VERSION_CHECK(5,0,0) || \
+ JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,17) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(8,0,0) || \
+ (JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) && defined(__C99_PRAGMA_OPERATOR))
+ #define JSON_HEDLEY_PRAGMA(value) _Pragma(#value)
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+ #define JSON_HEDLEY_PRAGMA(value) __pragma(value)
+#else
+ #define JSON_HEDLEY_PRAGMA(value)
+#endif
- static std::string name(const std::string& ename, int id_)
- {
- return "[json.exception." + ename + "." + std::to_string(id_) + "] ";
- }
+#if defined(JSON_HEDLEY_DIAGNOSTIC_PUSH)
+ #undef JSON_HEDLEY_DIAGNOSTIC_PUSH
+#endif
+#if defined(JSON_HEDLEY_DIAGNOSTIC_POP)
+ #undef JSON_HEDLEY_DIAGNOSTIC_POP
+#endif
+#if defined(__clang__)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push")
+ #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("clang diagnostic pop")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("warning(push)")
+ #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("warning(pop)")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,6,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push")
+ #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH __pragma(warning(push))
+ #define JSON_HEDLEY_DIAGNOSTIC_POP __pragma(warning(pop))
+#elif JSON_HEDLEY_ARM_VERSION_CHECK(5,6,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("push")
+ #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("pop")
+#elif \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,4,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,1,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("diag_push")
+ #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("diag_pop")
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(2,90,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH _Pragma("warning(push)")
+ #define JSON_HEDLEY_DIAGNOSTIC_POP _Pragma("warning(pop)")
+#else
+ #define JSON_HEDLEY_DIAGNOSTIC_PUSH
+ #define JSON_HEDLEY_DIAGNOSTIC_POP
+#endif
- private:
- /// an exception object as storage for error messages
- std::runtime_error m;
-};
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED)
+ #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wdeprecated-declarations")
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("warning(disable:1478 1786)")
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress 1215,1444")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,3,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED __pragma(warning(disable:4996))
+#elif \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress 1291,1718")
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,13,0) && !defined(__cplusplus)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("error_messages(off,E_DEPRECATED_ATT,E_DEPRECATED_ATT_MESS)")
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,13,0) && defined(__cplusplus)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("error_messages(off,symdeprecated,symdeprecated2)")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("diag_suppress=Pe1444,Pe1215")
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(2,90,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED _Pragma("warn(disable:2241)")
+#else
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED
+#endif
-/*!
-@brief exception indicating a parse error
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS)
+ #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-pragmas")
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("clang diagnostic ignored \"-Wunknown-pragmas\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("warning(disable:161)")
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 1675")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,3,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("GCC diagnostic ignored \"-Wunknown-pragmas\"")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS __pragma(warning(disable:4068))
+#elif \
+ JSON_HEDLEY_TI_VERSION_CHECK(16,9,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,0,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,3,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 163")
+#elif JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress 163")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS _Pragma("diag_suppress=Pe161")
+#else
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS
+#endif
-This exception is thrown by the library when a parse error occurs. Parse errors
-can occur during the deserialization of JSON text, CBOR, MessagePack, as well
-as when using JSON Patch.
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES)
+ #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-attributes")
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("clang diagnostic ignored \"-Wunknown-attributes\"")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(4,6,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(17,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("warning(disable:1292)")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(19,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES __pragma(warning(disable:5030))
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress 1097")
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,14,0) && defined(__cplusplus)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("error_messages(off,attrskipunsup)")
+#elif \
+ JSON_HEDLEY_TI_VERSION_CHECK(18,1,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,3,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress 1173")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES _Pragma("diag_suppress=Pe1097")
+#else
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES
+#endif
-Member @a byte holds the byte index of the last read character in the input
-file.
+#if defined(JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL)
+ #undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wcast-qual")
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL _Pragma("clang diagnostic ignored \"-Wcast-qual\"")
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL _Pragma("warning(disable:2203 2331)")
+#elif JSON_HEDLEY_GCC_VERSION_CHECK(3,0,0)
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL _Pragma("GCC diagnostic ignored \"-Wcast-qual\"")
+#else
+ #define JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL
+#endif
-Exceptions have ids 1xx.
+#if defined(JSON_HEDLEY_DEPRECATED)
+ #undef JSON_HEDLEY_DEPRECATED
+#endif
+#if defined(JSON_HEDLEY_DEPRECATED_FOR)
+ #undef JSON_HEDLEY_DEPRECATED_FOR
+#endif
+#if JSON_HEDLEY_MSVC_VERSION_CHECK(14,0,0)
+ #define JSON_HEDLEY_DEPRECATED(since) __declspec(deprecated("Since " # since))
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __declspec(deprecated("Since " #since "; use " #replacement))
+#elif defined(__cplusplus) && (__cplusplus >= 201402L)
+ #define JSON_HEDLEY_DEPRECATED(since) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[deprecated("Since " #since)]])
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[deprecated("Since " #since "; use " #replacement)]])
+#elif \
+ JSON_HEDLEY_HAS_EXTENSION(attribute_deprecated_with_message) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,5,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(5,6,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,13,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(18,1,0) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(18,1,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,3,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,3,0)
+ #define JSON_HEDLEY_DEPRECATED(since) __attribute__((__deprecated__("Since " #since)))
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __attribute__((__deprecated__("Since " #since "; use " #replacement)))
+#elif \
+ JSON_HEDLEY_HAS_ATTRIBUTE(deprecated) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_DEPRECATED(since) __attribute__((__deprecated__))
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __attribute__((__deprecated__))
+#elif \
+ JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0) || \
+ JSON_HEDLEY_PELLES_VERSION_CHECK(6,50,0)
+ #define JSON_HEDLEY_DEPRECATED(since) __declspec(deprecated)
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) __declspec(deprecated)
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_DEPRECATED(since) _Pragma("deprecated")
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement) _Pragma("deprecated")
+#else
+ #define JSON_HEDLEY_DEPRECATED(since)
+ #define JSON_HEDLEY_DEPRECATED_FOR(since, replacement)
+#endif
-name / id | example message | description
------------------------------- | --------------- | -------------------------
-json.exception.parse_error.101 | parse error at 2: unexpected end of input; expected string literal | This error indicates a syntax error while deserializing a JSON text. The error message describes that an unexpected token (character) was encountered, and the member @a byte indicates the error position.
-json.exception.parse_error.102 | parse error at 14: missing or wrong low surrogate | JSON uses the `\uxxxx` format to describe Unicode characters. Code points above above 0xFFFF are split into two `\uxxxx` entries ("surrogate pairs"). This error indicates that the surrogate pair is incomplete or contains an invalid code point.
-json.exception.parse_error.103 | parse error: code points above 0x10FFFF are invalid | Unicode supports code points up to 0x10FFFF. Code points above 0x10FFFF are invalid.
-json.exception.parse_error.104 | parse error: JSON patch must be an array of objects | [RFC 6902](https://tools.ietf.org/html/rfc6902) requires a JSON Patch document to be a JSON document that represents an array of objects.
-json.exception.parse_error.105 | parse error: operation must have string member 'op' | An operation of a JSON Patch document must contain exactly one "op" member, whose value indicates the operation to perform. Its value must be one of "add", "remove", "replace", "move", "copy", or "test"; other values are errors.
-json.exception.parse_error.106 | parse error: array index '01' must not begin with '0' | An array index in a JSON Pointer ([RFC 6901](https://tools.ietf.org/html/rfc6901)) may be `0` or any number without a leading `0`.
-json.exception.parse_error.107 | parse error: JSON pointer must be empty or begin with '/' - was: 'foo' | A JSON Pointer must be a Unicode string containing a sequence of zero or more reference tokens, each prefixed by a `/` character.
-json.exception.parse_error.108 | parse error: escape character '~' must be followed with '0' or '1' | In a JSON Pointer, only `~0` and `~1` are valid escape sequences.
-json.exception.parse_error.109 | parse error: array index 'one' is not a number | A JSON Pointer array index must be a number.
-json.exception.parse_error.110 | parse error at 1: cannot read 2 bytes from vector | When parsing CBOR or MessagePack, the byte vector ends before the complete value has been read.
-json.exception.parse_error.112 | parse error at 1: error reading CBOR; last byte: 0xF8 | Not all types of CBOR or MessagePack are supported. This exception occurs if an unsupported byte was read.
-json.exception.parse_error.113 | parse error at 2: expected a CBOR string; last byte: 0x98 | While parsing a map key, a value that is not a string has been read.
+#if defined(JSON_HEDLEY_UNAVAILABLE)
+ #undef JSON_HEDLEY_UNAVAILABLE
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(warning) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,3,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_UNAVAILABLE(available_since) __attribute__((__warning__("Not available until " #available_since)))
+#else
+ #define JSON_HEDLEY_UNAVAILABLE(available_since)
+#endif
-@note For an input with n bytes, 1 is the index of the first character and n+1
- is the index of the terminating null byte or the end of file. This also
- holds true when reading a byte vector (CBOR or MessagePack).
+#if defined(JSON_HEDLEY_WARN_UNUSED_RESULT)
+ #undef JSON_HEDLEY_WARN_UNUSED_RESULT
+#endif
+#if defined(JSON_HEDLEY_WARN_UNUSED_RESULT_MSG)
+ #undef JSON_HEDLEY_WARN_UNUSED_RESULT_MSG
+#endif
+#if (JSON_HEDLEY_HAS_CPP_ATTRIBUTE(nodiscard) >= 201907L)
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard]])
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard(msg)]])
+#elif JSON_HEDLEY_HAS_CPP_ATTRIBUTE(nodiscard)
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard]])
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[nodiscard]])
+#elif \
+ JSON_HEDLEY_HAS_ATTRIBUTE(warn_unused_result) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+ (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0) && defined(__cplusplus)) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) __attribute__((__warn_unused_result__))
+#elif defined(_Check_return_) /* SAL */
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT _Check_return_
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg) _Check_return_
+#else
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT
+ #define JSON_HEDLEY_WARN_UNUSED_RESULT_MSG(msg)
+#endif
-@liveexample{The following code shows how a `parse_error` exception can be
-caught.,parse_error}
+#if defined(JSON_HEDLEY_SENTINEL)
+ #undef JSON_HEDLEY_SENTINEL
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(sentinel) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(5,4,0)
+ #define JSON_HEDLEY_SENTINEL(position) __attribute__((__sentinel__(position)))
+#else
+ #define JSON_HEDLEY_SENTINEL(position)
+#endif
-@sa @ref exception for the base class of the library exceptions
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref type_error for exceptions indicating executing a member function with
- a wrong type
-@sa @ref out_of_range for exceptions indicating access out of the defined range
-@sa @ref other_error for exceptions indicating other library errors
+#if defined(JSON_HEDLEY_NO_RETURN)
+ #undef JSON_HEDLEY_NO_RETURN
+#endif
+#if JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_NO_RETURN __noreturn
+#elif JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_NO_RETURN __attribute__((__noreturn__))
+#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+ #define JSON_HEDLEY_NO_RETURN _Noreturn
+#elif defined(__cplusplus) && (__cplusplus >= 201103L)
+ #define JSON_HEDLEY_NO_RETURN JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[noreturn]])
+#elif \
+ JSON_HEDLEY_HAS_ATTRIBUTE(noreturn) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,2,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_NO_RETURN __attribute__((__noreturn__))
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+ #define JSON_HEDLEY_NO_RETURN _Pragma("does_not_return")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0)
+ #define JSON_HEDLEY_NO_RETURN __declspec(noreturn)
+#elif JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,0,0) && defined(__cplusplus)
+ #define JSON_HEDLEY_NO_RETURN _Pragma("FUNC_NEVER_RETURNS;")
+#elif JSON_HEDLEY_COMPCERT_VERSION_CHECK(3,2,0)
+ #define JSON_HEDLEY_NO_RETURN __attribute((noreturn))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(9,0,0)
+ #define JSON_HEDLEY_NO_RETURN __declspec(noreturn)
+#else
+ #define JSON_HEDLEY_NO_RETURN
+#endif
-@since version 3.0.0
-*/
-class parse_error : public exception
-{
- public:
- /*!
- @brief create a parse error exception
- @param[in] id_ the id of the exception
- @param[in] byte_ the byte index where the error occurred (or 0 if the
- position cannot be determined)
- @param[in] what_arg the explanatory string
- @return parse_error object
- */
- static parse_error create(int id_, std::size_t byte_, const std::string& what_arg)
- {
- std::string w = exception::name("parse_error", id_) + "parse error" +
- (byte_ != 0 ? (" at " + std::to_string(byte_)) : "") +
- ": " + what_arg;
- return parse_error(id_, byte_, w.c_str());
- }
+#if defined(JSON_HEDLEY_NO_ESCAPE)
+ #undef JSON_HEDLEY_NO_ESCAPE
+#endif
+#if JSON_HEDLEY_HAS_ATTRIBUTE(noescape)
+ #define JSON_HEDLEY_NO_ESCAPE __attribute__((__noescape__))
+#else
+ #define JSON_HEDLEY_NO_ESCAPE
+#endif
- /*!
- @brief byte index of the parse error
+#if defined(JSON_HEDLEY_UNREACHABLE)
+ #undef JSON_HEDLEY_UNREACHABLE
+#endif
+#if defined(JSON_HEDLEY_UNREACHABLE_RETURN)
+ #undef JSON_HEDLEY_UNREACHABLE_RETURN
+#endif
+#if defined(JSON_HEDLEY_ASSUME)
+ #undef JSON_HEDLEY_ASSUME
+#endif
+#if \
+ JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_ASSUME(expr) __assume(expr)
+#elif JSON_HEDLEY_HAS_BUILTIN(__builtin_assume)
+ #define JSON_HEDLEY_ASSUME(expr) __builtin_assume(expr)
+#elif \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(4,0,0)
+ #if defined(__cplusplus)
+ #define JSON_HEDLEY_ASSUME(expr) std::_nassert(expr)
+ #else
+ #define JSON_HEDLEY_ASSUME(expr) _nassert(expr)
+ #endif
+#endif
+#if \
+ (JSON_HEDLEY_HAS_BUILTIN(__builtin_unreachable) && (!defined(JSON_HEDLEY_ARM_VERSION))) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,5,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(18,10,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(13,1,5)
+ #define JSON_HEDLEY_UNREACHABLE() __builtin_unreachable()
+#elif defined(JSON_HEDLEY_ASSUME)
+ #define JSON_HEDLEY_UNREACHABLE() JSON_HEDLEY_ASSUME(0)
+#endif
+#if !defined(JSON_HEDLEY_ASSUME)
+ #if defined(JSON_HEDLEY_UNREACHABLE)
+ #define JSON_HEDLEY_ASSUME(expr) JSON_HEDLEY_STATIC_CAST(void, ((expr) ? 1 : (JSON_HEDLEY_UNREACHABLE(), 1)))
+ #else
+ #define JSON_HEDLEY_ASSUME(expr) JSON_HEDLEY_STATIC_CAST(void, expr)
+ #endif
+#endif
+#if defined(JSON_HEDLEY_UNREACHABLE)
+ #if \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(4,0,0)
+ #define JSON_HEDLEY_UNREACHABLE_RETURN(value) return (JSON_HEDLEY_STATIC_CAST(void, JSON_HEDLEY_ASSUME(0)), (value))
+ #else
+ #define JSON_HEDLEY_UNREACHABLE_RETURN(value) JSON_HEDLEY_UNREACHABLE()
+ #endif
+#else
+ #define JSON_HEDLEY_UNREACHABLE_RETURN(value) return (value)
+#endif
+#if !defined(JSON_HEDLEY_UNREACHABLE)
+ #define JSON_HEDLEY_UNREACHABLE() JSON_HEDLEY_ASSUME(0)
+#endif
- The byte index of the last read character in the input file.
+JSON_HEDLEY_DIAGNOSTIC_PUSH
+#if JSON_HEDLEY_HAS_WARNING("-Wpedantic")
+ #pragma clang diagnostic ignored "-Wpedantic"
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wc++98-compat-pedantic") && defined(__cplusplus)
+ #pragma clang diagnostic ignored "-Wc++98-compat-pedantic"
+#endif
+#if JSON_HEDLEY_GCC_HAS_WARNING("-Wvariadic-macros",4,0,0)
+ #if defined(__clang__)
+ #pragma clang diagnostic ignored "-Wvariadic-macros"
+ #elif defined(JSON_HEDLEY_GCC_VERSION)
+ #pragma GCC diagnostic ignored "-Wvariadic-macros"
+ #endif
+#endif
+#if defined(JSON_HEDLEY_NON_NULL)
+ #undef JSON_HEDLEY_NON_NULL
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(nonnull) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,3,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0)
+ #define JSON_HEDLEY_NON_NULL(...) __attribute__((__nonnull__(__VA_ARGS__)))
+#else
+ #define JSON_HEDLEY_NON_NULL(...)
+#endif
+JSON_HEDLEY_DIAGNOSTIC_POP
- @note For an input with n bytes, 1 is the index of the first character and
- n+1 is the index of the terminating null byte or the end of file.
- This also holds true when reading a byte vector (CBOR or MessagePack).
- */
- const std::size_t byte;
+#if defined(JSON_HEDLEY_PRINTF_FORMAT)
+ #undef JSON_HEDLEY_PRINTF_FORMAT
+#endif
+#if defined(__MINGW32__) && JSON_HEDLEY_GCC_HAS_ATTRIBUTE(format,4,4,0) && !defined(__USE_MINGW_ANSI_STDIO)
+ #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __attribute__((__format__(ms_printf, string_idx, first_to_check)))
+#elif defined(__MINGW32__) && JSON_HEDLEY_GCC_HAS_ATTRIBUTE(format,4,4,0) && defined(__USE_MINGW_ANSI_STDIO)
+ #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __attribute__((__format__(gnu_printf, string_idx, first_to_check)))
+#elif \
+ JSON_HEDLEY_HAS_ATTRIBUTE(format) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(5,6,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __attribute__((__format__(__printf__, string_idx, first_to_check)))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(6,0,0)
+ #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check) __declspec(vaformat(printf,string_idx,first_to_check))
+#else
+ #define JSON_HEDLEY_PRINTF_FORMAT(string_idx,first_to_check)
+#endif
- private:
- parse_error(int id_, std::size_t byte_, const char* what_arg)
- : exception(id_, what_arg), byte(byte_) {}
-};
+#if defined(JSON_HEDLEY_CONSTEXPR)
+ #undef JSON_HEDLEY_CONSTEXPR
+#endif
+#if defined(__cplusplus)
+ #if __cplusplus >= 201103L
+ #define JSON_HEDLEY_CONSTEXPR JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(constexpr)
+ #endif
+#endif
+#if !defined(JSON_HEDLEY_CONSTEXPR)
+ #define JSON_HEDLEY_CONSTEXPR
+#endif
-/*!
-@brief exception indicating errors with iterators
+#if defined(JSON_HEDLEY_PREDICT)
+ #undef JSON_HEDLEY_PREDICT
+#endif
+#if defined(JSON_HEDLEY_LIKELY)
+ #undef JSON_HEDLEY_LIKELY
+#endif
+#if defined(JSON_HEDLEY_UNLIKELY)
+ #undef JSON_HEDLEY_UNLIKELY
+#endif
+#if defined(JSON_HEDLEY_UNPREDICTABLE)
+ #undef JSON_HEDLEY_UNPREDICTABLE
+#endif
+#if JSON_HEDLEY_HAS_BUILTIN(__builtin_unpredictable)
+ #define JSON_HEDLEY_UNPREDICTABLE(expr) __builtin_unpredictable((expr))
+#endif
+#if \
+ JSON_HEDLEY_HAS_BUILTIN(__builtin_expect_with_probability) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(9,0,0)
+# define JSON_HEDLEY_PREDICT(expr, value, probability) __builtin_expect_with_probability( (expr), (value), (probability))
+# define JSON_HEDLEY_PREDICT_TRUE(expr, probability) __builtin_expect_with_probability(!!(expr), 1 , (probability))
+# define JSON_HEDLEY_PREDICT_FALSE(expr, probability) __builtin_expect_with_probability(!!(expr), 0 , (probability))
+# define JSON_HEDLEY_LIKELY(expr) __builtin_expect (!!(expr), 1 )
+# define JSON_HEDLEY_UNLIKELY(expr) __builtin_expect (!!(expr), 0 )
+#elif \
+ JSON_HEDLEY_HAS_BUILTIN(__builtin_expect) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,15,0) && defined(__cplusplus)) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,7,0) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(3,1,0) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,1,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,1,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+ JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,27) || \
+ JSON_HEDLEY_CRAY_VERSION_CHECK(8,1,0)
+# define JSON_HEDLEY_PREDICT(expr, expected, probability) \
+ (((probability) >= 0.9) ? __builtin_expect((expr), (expected)) : (JSON_HEDLEY_STATIC_CAST(void, expected), (expr)))
+# define JSON_HEDLEY_PREDICT_TRUE(expr, probability) \
+ (__extension__ ({ \
+ double hedley_probability_ = (probability); \
+ ((hedley_probability_ >= 0.9) ? __builtin_expect(!!(expr), 1) : ((hedley_probability_ <= 0.1) ? __builtin_expect(!!(expr), 0) : !!(expr))); \
+ }))
+# define JSON_HEDLEY_PREDICT_FALSE(expr, probability) \
+ (__extension__ ({ \
+ double hedley_probability_ = (probability); \
+ ((hedley_probability_ >= 0.9) ? __builtin_expect(!!(expr), 0) : ((hedley_probability_ <= 0.1) ? __builtin_expect(!!(expr), 1) : !!(expr))); \
+ }))
+# define JSON_HEDLEY_LIKELY(expr) __builtin_expect(!!(expr), 1)
+# define JSON_HEDLEY_UNLIKELY(expr) __builtin_expect(!!(expr), 0)
+#else
+# define JSON_HEDLEY_PREDICT(expr, expected, probability) (JSON_HEDLEY_STATIC_CAST(void, expected), (expr))
+# define JSON_HEDLEY_PREDICT_TRUE(expr, probability) (!!(expr))
+# define JSON_HEDLEY_PREDICT_FALSE(expr, probability) (!!(expr))
+# define JSON_HEDLEY_LIKELY(expr) (!!(expr))
+# define JSON_HEDLEY_UNLIKELY(expr) (!!(expr))
+#endif
+#if !defined(JSON_HEDLEY_UNPREDICTABLE)
+ #define JSON_HEDLEY_UNPREDICTABLE(expr) JSON_HEDLEY_PREDICT(expr, 1, 0.5)
+#endif
-This exception is thrown if iterators passed to a library function do not match
-the expected semantics.
+#if defined(JSON_HEDLEY_MALLOC)
+ #undef JSON_HEDLEY_MALLOC
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(malloc) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(12,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_MALLOC __attribute__((__malloc__))
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+ #define JSON_HEDLEY_MALLOC _Pragma("returns_new_memory")
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(14, 0, 0)
+ #define JSON_HEDLEY_MALLOC __declspec(restrict)
+#else
+ #define JSON_HEDLEY_MALLOC
+#endif
-Exceptions have ids 2xx.
+#if defined(JSON_HEDLEY_PURE)
+ #undef JSON_HEDLEY_PURE
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(pure) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(2,96,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+# define JSON_HEDLEY_PURE __attribute__((__pure__))
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+# define JSON_HEDLEY_PURE _Pragma("does_not_write_global_data")
+#elif defined(__cplusplus) && \
+ ( \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(2,0,1) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(4,0,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) \
+ )
+# define JSON_HEDLEY_PURE _Pragma("FUNC_IS_PURE;")
+#else
+# define JSON_HEDLEY_PURE
+#endif
-name / id | example message | description
------------------------------------ | --------------- | -------------------------
-json.exception.invalid_iterator.201 | iterators are not compatible | The iterators passed to constructor @ref basic_json(InputIT first, InputIT last) are not compatible, meaning they do not belong to the same container. Therefore, the range (@a first, @a last) is invalid.
-json.exception.invalid_iterator.202 | iterator does not fit current value | In an erase or insert function, the passed iterator @a pos does not belong to the JSON value for which the function was called. It hence does not define a valid position for the deletion/insertion.
-json.exception.invalid_iterator.203 | iterators do not fit current value | Either iterator passed to function @ref erase(IteratorType first, IteratorType last) does not belong to the JSON value from which values shall be erased. It hence does not define a valid range to delete values from.
-json.exception.invalid_iterator.204 | iterators out of range | When an iterator range for a primitive type (number, boolean, or string) is passed to a constructor or an erase function, this range has to be exactly (@ref begin(), @ref end()), because this is the only way the single stored value is expressed. All other ranges are invalid.
-json.exception.invalid_iterator.205 | iterator out of range | When an iterator for a primitive type (number, boolean, or string) is passed to an erase function, the iterator has to be the @ref begin() iterator, because it is the only way to address the stored value. All other iterators are invalid.
-json.exception.invalid_iterator.206 | cannot construct with iterators from null | The iterators passed to constructor @ref basic_json(InputIT first, InputIT last) belong to a JSON null value and hence to not define a valid range.
-json.exception.invalid_iterator.207 | cannot use key() for non-object iterators | The key() member function can only be used on iterators belonging to a JSON object, because other types do not have a concept of a key.
-json.exception.invalid_iterator.208 | cannot use operator[] for object iterators | The operator[] to specify a concrete offset cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
-json.exception.invalid_iterator.209 | cannot use offsets with object iterators | The offset operators (+, -, +=, -=) cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
-json.exception.invalid_iterator.210 | iterators do not fit | The iterator range passed to the insert function are not compatible, meaning they do not belong to the same container. Therefore, the range (@a first, @a last) is invalid.
-json.exception.invalid_iterator.211 | passed iterators may not belong to container | The iterator range passed to the insert function must not be a subrange of the container to insert to.
-json.exception.invalid_iterator.212 | cannot compare iterators of different containers | When two iterators are compared, they must belong to the same container.
-json.exception.invalid_iterator.213 | cannot compare order of object iterators | The order of object iterators cannot be compared, because JSON objects are unordered.
-json.exception.invalid_iterator.214 | cannot get value | Cannot get value for iterator: Either the iterator belongs to a null value or it is an iterator to a primitive type (number, boolean, or string), but the iterator is different to @ref begin().
+#if defined(JSON_HEDLEY_CONST)
+ #undef JSON_HEDLEY_CONST
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(const) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(2,5,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0)
+ #define JSON_HEDLEY_CONST __attribute__((__const__))
+#elif \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0)
+ #define JSON_HEDLEY_CONST _Pragma("no_side_effect")
+#else
+ #define JSON_HEDLEY_CONST JSON_HEDLEY_PURE
+#endif
-@liveexample{The following code shows how an `invalid_iterator` exception can be
-caught.,invalid_iterator}
+#if defined(JSON_HEDLEY_RESTRICT)
+ #undef JSON_HEDLEY_RESTRICT
+#endif
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && !defined(__cplusplus)
+ #define JSON_HEDLEY_RESTRICT restrict
+#elif \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,1,0) || \
+ JSON_HEDLEY_MSVC_VERSION_CHECK(14,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(17,10,0) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,4) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,1,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,14,0) && defined(__cplusplus)) || \
+ JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0) || \
+ defined(__clang__)
+ #define JSON_HEDLEY_RESTRICT __restrict
+#elif JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,3,0) && !defined(__cplusplus)
+ #define JSON_HEDLEY_RESTRICT _Restrict
+#else
+ #define JSON_HEDLEY_RESTRICT
+#endif
-@sa @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
-@sa @ref type_error for exceptions indicating executing a member function with
- a wrong type
-@sa @ref out_of_range for exceptions indicating access out of the defined range
-@sa @ref other_error for exceptions indicating other library errors
+#if defined(JSON_HEDLEY_INLINE)
+ #undef JSON_HEDLEY_INLINE
+#endif
+#if \
+ (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \
+ (defined(__cplusplus) && (__cplusplus >= 199711L))
+ #define JSON_HEDLEY_INLINE inline
+#elif \
+ defined(JSON_HEDLEY_GCC_VERSION) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(6,2,0)
+ #define JSON_HEDLEY_INLINE __inline__
+#elif \
+ JSON_HEDLEY_MSVC_VERSION_CHECK(12,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,1,0) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(3,1,0) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,2,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(8,0,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_INLINE __inline
+#else
+ #define JSON_HEDLEY_INLINE
+#endif
-@since version 3.0.0
-*/
-class invalid_iterator : public exception
-{
- public:
- static invalid_iterator create(int id_, const std::string& what_arg)
- {
- std::string w = exception::name("invalid_iterator", id_) + what_arg;
- return invalid_iterator(id_, w.c_str());
- }
+#if defined(JSON_HEDLEY_ALWAYS_INLINE)
+ #undef JSON_HEDLEY_ALWAYS_INLINE
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(always_inline) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+# define JSON_HEDLEY_ALWAYS_INLINE __attribute__((__always_inline__)) JSON_HEDLEY_INLINE
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(12,0,0)
+# define JSON_HEDLEY_ALWAYS_INLINE __forceinline
+#elif defined(__cplusplus) && \
+ ( \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,1,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0) \
+ )
+# define JSON_HEDLEY_ALWAYS_INLINE _Pragma("FUNC_ALWAYS_INLINE;")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+# define JSON_HEDLEY_ALWAYS_INLINE _Pragma("inline=forced")
+#else
+# define JSON_HEDLEY_ALWAYS_INLINE JSON_HEDLEY_INLINE
+#endif
- private:
- invalid_iterator(int id_, const char* what_arg)
- : exception(id_, what_arg) {}
-};
+#if defined(JSON_HEDLEY_NEVER_INLINE)
+ #undef JSON_HEDLEY_NEVER_INLINE
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(noinline) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(10,1,0) || \
+ JSON_HEDLEY_TI_VERSION_CHECK(15,12,0) || \
+ (JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(4,8,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_ARMCL_VERSION_CHECK(5,2,0) || \
+ (JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL2000_VERSION_CHECK(6,4,0) || \
+ (JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,0,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(4,3,0) || \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) || \
+ JSON_HEDLEY_TI_CL7X_VERSION_CHECK(1,2,0) || \
+ JSON_HEDLEY_TI_CLPRU_VERSION_CHECK(2,1,0)
+ #define JSON_HEDLEY_NEVER_INLINE __attribute__((__noinline__))
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(13,10,0)
+ #define JSON_HEDLEY_NEVER_INLINE __declspec(noinline)
+#elif JSON_HEDLEY_PGI_VERSION_CHECK(10,2,0)
+ #define JSON_HEDLEY_NEVER_INLINE _Pragma("noinline")
+#elif JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,0,0) && defined(__cplusplus)
+ #define JSON_HEDLEY_NEVER_INLINE _Pragma("FUNC_CANNOT_INLINE;")
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+ #define JSON_HEDLEY_NEVER_INLINE _Pragma("inline=never")
+#elif JSON_HEDLEY_COMPCERT_VERSION_CHECK(3,2,0)
+ #define JSON_HEDLEY_NEVER_INLINE __attribute((noinline))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(9,0,0)
+ #define JSON_HEDLEY_NEVER_INLINE __declspec(noinline)
+#else
+ #define JSON_HEDLEY_NEVER_INLINE
+#endif
-/*!
-@brief exception indicating executing a member function with a wrong type
+#if defined(JSON_HEDLEY_PRIVATE)
+ #undef JSON_HEDLEY_PRIVATE
+#endif
+#if defined(JSON_HEDLEY_PUBLIC)
+ #undef JSON_HEDLEY_PUBLIC
+#endif
+#if defined(JSON_HEDLEY_IMPORT)
+ #undef JSON_HEDLEY_IMPORT
+#endif
+#if defined(_WIN32) || defined(__CYGWIN__)
+# define JSON_HEDLEY_PRIVATE
+# define JSON_HEDLEY_PUBLIC __declspec(dllexport)
+# define JSON_HEDLEY_IMPORT __declspec(dllimport)
+#else
+# if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(visibility) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,3,0) || \
+ JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,11,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(13,1,0) || \
+ ( \
+ defined(__TI_EABI__) && \
+ ( \
+ (JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,2,0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(7,5,0) \
+ ) \
+ )
+# define JSON_HEDLEY_PRIVATE __attribute__((__visibility__("hidden")))
+# define JSON_HEDLEY_PUBLIC __attribute__((__visibility__("default")))
+# else
+# define JSON_HEDLEY_PRIVATE
+# define JSON_HEDLEY_PUBLIC
+# endif
+# define JSON_HEDLEY_IMPORT extern
+#endif
-This exception is thrown in case of a type error; that is, a library function is
-executed on a JSON value whose type does not match the expected semantics.
+#if defined(JSON_HEDLEY_NO_THROW)
+ #undef JSON_HEDLEY_NO_THROW
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(nothrow) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,3,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+ #define JSON_HEDLEY_NO_THROW __attribute__((__nothrow__))
+#elif \
+ JSON_HEDLEY_MSVC_VERSION_CHECK(13,1,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0)
+ #define JSON_HEDLEY_NO_THROW __declspec(nothrow)
+#else
+ #define JSON_HEDLEY_NO_THROW
+#endif
-Exceptions have ids 3xx.
+#if defined(JSON_HEDLEY_FALL_THROUGH)
+ #undef JSON_HEDLEY_FALL_THROUGH
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(fallthrough) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(7,0,0)
+ #define JSON_HEDLEY_FALL_THROUGH __attribute__((__fallthrough__))
+#elif JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS(clang,fallthrough)
+ #define JSON_HEDLEY_FALL_THROUGH JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[clang::fallthrough]])
+#elif JSON_HEDLEY_HAS_CPP_ATTRIBUTE(fallthrough)
+ #define JSON_HEDLEY_FALL_THROUGH JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_([[fallthrough]])
+#elif defined(__fallthrough) /* SAL */
+ #define JSON_HEDLEY_FALL_THROUGH __fallthrough
+#else
+ #define JSON_HEDLEY_FALL_THROUGH
+#endif
-name / id | example message | description
------------------------------ | --------------- | -------------------------
-json.exception.type_error.301 | cannot create object from initializer list | To create an object from an initializer list, the initializer list must consist only of a list of pairs whose first element is a string. When this constraint is violated, an array is created instead.
-json.exception.type_error.302 | type must be object, but is array | During implicit or explicit value conversion, the JSON type must be compatible to the target type. For instance, a JSON string can only be converted into string types, but not into numbers or boolean types.
-json.exception.type_error.303 | incompatible ReferenceType for get_ref, actual type is object | To retrieve a reference to a value stored in a @ref basic_json object with @ref get_ref, the type of the reference must match the value type. For instance, for a JSON array, the @a ReferenceType must be @ref array_t&.
-json.exception.type_error.304 | cannot use at() with string | The @ref at() member functions can only be executed for certain JSON types.
-json.exception.type_error.305 | cannot use operator[] with string | The @ref operator[] member functions can only be executed for certain JSON types.
-json.exception.type_error.306 | cannot use value() with string | The @ref value() member functions can only be executed for certain JSON types.
-json.exception.type_error.307 | cannot use erase() with string | The @ref erase() member functions can only be executed for certain JSON types.
-json.exception.type_error.308 | cannot use push_back() with string | The @ref push_back() and @ref operator+= member functions can only be executed for certain JSON types.
-json.exception.type_error.309 | cannot use insert() with | The @ref insert() member functions can only be executed for certain JSON types.
-json.exception.type_error.310 | cannot use swap() with number | The @ref swap() member functions can only be executed for certain JSON types.
-json.exception.type_error.311 | cannot use emplace_back() with string | The @ref emplace_back() member function can only be executed for certain JSON types.
-json.exception.type_error.312 | cannot use update() with string | The @ref update() member functions can only be executed for certain JSON types.
-json.exception.type_error.313 | invalid value to unflatten | The @ref unflatten function converts an object whose keys are JSON Pointers back into an arbitrary nested JSON value. The JSON Pointers must not overlap, because then the resulting value would not be well defined.
-json.exception.type_error.314 | only objects can be unflattened | The @ref unflatten function only works for an object whose keys are JSON Pointers.
-json.exception.type_error.315 | values in object must be primitive | The @ref unflatten function only works for an object whose keys are JSON Pointers and whose values are primitive.
-json.exception.type_error.316 | invalid UTF-8 byte at index 10: 0x7E | The @ref dump function only works with UTF-8 encoded strings; that is, if you assign a `std::string` to a JSON value, make sure it is UTF-8 encoded. |
+#if defined(JSON_HEDLEY_RETURNS_NON_NULL)
+ #undef JSON_HEDLEY_RETURNS_NON_NULL
+#endif
+#if \
+ JSON_HEDLEY_HAS_ATTRIBUTE(returns_nonnull) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0)
+ #define JSON_HEDLEY_RETURNS_NON_NULL __attribute__((__returns_nonnull__))
+#elif defined(_Ret_notnull_) /* SAL */
+ #define JSON_HEDLEY_RETURNS_NON_NULL _Ret_notnull_
+#else
+ #define JSON_HEDLEY_RETURNS_NON_NULL
+#endif
-@liveexample{The following code shows how a `type_error` exception can be
-caught.,type_error}
+#if defined(JSON_HEDLEY_ARRAY_PARAM)
+ #undef JSON_HEDLEY_ARRAY_PARAM
+#endif
+#if \
+ defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
+ !defined(__STDC_NO_VLA__) && \
+ !defined(__cplusplus) && \
+ !defined(JSON_HEDLEY_PGI_VERSION) && \
+ !defined(JSON_HEDLEY_TINYC_VERSION)
+ #define JSON_HEDLEY_ARRAY_PARAM(name) (name)
+#else
+ #define JSON_HEDLEY_ARRAY_PARAM(name)
+#endif
-@sa @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref out_of_range for exceptions indicating access out of the defined range
-@sa @ref other_error for exceptions indicating other library errors
+#if defined(JSON_HEDLEY_IS_CONSTANT)
+ #undef JSON_HEDLEY_IS_CONSTANT
+#endif
+#if defined(JSON_HEDLEY_REQUIRE_CONSTEXPR)
+ #undef JSON_HEDLEY_REQUIRE_CONSTEXPR
+#endif
+/* JSON_HEDLEY_IS_CONSTEXPR_ is for
+ HEDLEY INTERNAL USE ONLY. API subject to change without notice. */
+#if defined(JSON_HEDLEY_IS_CONSTEXPR_)
+ #undef JSON_HEDLEY_IS_CONSTEXPR_
+#endif
+#if \
+ JSON_HEDLEY_HAS_BUILTIN(__builtin_constant_p) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,19) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(4,1,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(13,1,0) || \
+ JSON_HEDLEY_TI_CL6X_VERSION_CHECK(6,1,0) || \
+ (JSON_HEDLEY_SUNPRO_VERSION_CHECK(5,10,0) && !defined(__cplusplus)) || \
+ JSON_HEDLEY_CRAY_VERSION_CHECK(8,1,0)
+ #define JSON_HEDLEY_IS_CONSTANT(expr) __builtin_constant_p(expr)
+#endif
+#if !defined(__cplusplus)
+# if \
+ JSON_HEDLEY_HAS_BUILTIN(__builtin_types_compatible_p) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(3,4,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(13,1,0) || \
+ JSON_HEDLEY_CRAY_VERSION_CHECK(8,1,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(5,4,0) || \
+ JSON_HEDLEY_TINYC_VERSION_CHECK(0,9,24)
+#if defined(__INTPTR_TYPE__)
+ #define JSON_HEDLEY_IS_CONSTEXPR_(expr) __builtin_types_compatible_p(__typeof__((1 ? (void*) ((__INTPTR_TYPE__) ((expr) * 0)) : (int*) 0)), int*)
+#else
+ #include <stdint.h>
+ #define JSON_HEDLEY_IS_CONSTEXPR_(expr) __builtin_types_compatible_p(__typeof__((1 ? (void*) ((intptr_t) ((expr) * 0)) : (int*) 0)), int*)
+#endif
+# elif \
+ ( \
+ defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) && \
+ !defined(JSON_HEDLEY_SUNPRO_VERSION) && \
+ !defined(JSON_HEDLEY_PGI_VERSION) && \
+ !defined(JSON_HEDLEY_IAR_VERSION)) || \
+ JSON_HEDLEY_HAS_EXTENSION(c_generic_selections) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,9,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(17,0,0) || \
+ JSON_HEDLEY_IBM_VERSION_CHECK(12,1,0) || \
+ JSON_HEDLEY_ARM_VERSION_CHECK(5,3,0)
+#if defined(__INTPTR_TYPE__)
+ #define JSON_HEDLEY_IS_CONSTEXPR_(expr) _Generic((1 ? (void*) ((__INTPTR_TYPE__) ((expr) * 0)) : (int*) 0), int*: 1, void*: 0)
+#else
+ #include <stdint.h>
+ #define JSON_HEDLEY_IS_CONSTEXPR_(expr) _Generic((1 ? (void*) ((intptr_t) * 0) : (int*) 0), int*: 1, void*: 0)
+#endif
+# elif \
+ defined(JSON_HEDLEY_GCC_VERSION) || \
+ defined(JSON_HEDLEY_INTEL_VERSION) || \
+ defined(JSON_HEDLEY_TINYC_VERSION) || \
+ defined(JSON_HEDLEY_TI_ARMCL_VERSION) || \
+ JSON_HEDLEY_TI_CL430_VERSION_CHECK(18,12,0) || \
+ defined(JSON_HEDLEY_TI_CL2000_VERSION) || \
+ defined(JSON_HEDLEY_TI_CL6X_VERSION) || \
+ defined(JSON_HEDLEY_TI_CL7X_VERSION) || \
+ defined(JSON_HEDLEY_TI_CLPRU_VERSION) || \
+ defined(__clang__)
+# define JSON_HEDLEY_IS_CONSTEXPR_(expr) ( \
+ sizeof(void) != \
+ sizeof(*( \
+ 1 ? \
+ ((void*) ((expr) * 0L) ) : \
+((struct { char v[sizeof(void) * 2]; } *) 1) \
+ ) \
+ ) \
+ )
+# endif
+#endif
+#if defined(JSON_HEDLEY_IS_CONSTEXPR_)
+ #if !defined(JSON_HEDLEY_IS_CONSTANT)
+ #define JSON_HEDLEY_IS_CONSTANT(expr) JSON_HEDLEY_IS_CONSTEXPR_(expr)
+ #endif
+ #define JSON_HEDLEY_REQUIRE_CONSTEXPR(expr) (JSON_HEDLEY_IS_CONSTEXPR_(expr) ? (expr) : (-1))
+#else
+ #if !defined(JSON_HEDLEY_IS_CONSTANT)
+ #define JSON_HEDLEY_IS_CONSTANT(expr) (0)
+ #endif
+ #define JSON_HEDLEY_REQUIRE_CONSTEXPR(expr) (expr)
+#endif
-@since version 3.0.0
-*/
-class type_error : public exception
-{
- public:
- static type_error create(int id_, const std::string& what_arg)
- {
- std::string w = exception::name("type_error", id_) + what_arg;
- return type_error(id_, w.c_str());
- }
+#if defined(JSON_HEDLEY_BEGIN_C_DECLS)
+ #undef JSON_HEDLEY_BEGIN_C_DECLS
+#endif
+#if defined(JSON_HEDLEY_END_C_DECLS)
+ #undef JSON_HEDLEY_END_C_DECLS
+#endif
+#if defined(JSON_HEDLEY_C_DECL)
+ #undef JSON_HEDLEY_C_DECL
+#endif
+#if defined(__cplusplus)
+ #define JSON_HEDLEY_BEGIN_C_DECLS extern "C" {
+ #define JSON_HEDLEY_END_C_DECLS }
+ #define JSON_HEDLEY_C_DECL extern "C"
+#else
+ #define JSON_HEDLEY_BEGIN_C_DECLS
+ #define JSON_HEDLEY_END_C_DECLS
+ #define JSON_HEDLEY_C_DECL
+#endif
- private:
- type_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
-};
+#if defined(JSON_HEDLEY_STATIC_ASSERT)
+ #undef JSON_HEDLEY_STATIC_ASSERT
+#endif
+#if \
+ !defined(__cplusplus) && ( \
+ (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)) || \
+ JSON_HEDLEY_HAS_FEATURE(c_static_assert) || \
+ JSON_HEDLEY_GCC_VERSION_CHECK(6,0,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0) || \
+ defined(_Static_assert) \
+ )
+# define JSON_HEDLEY_STATIC_ASSERT(expr, message) _Static_assert(expr, message)
+#elif \
+ (defined(__cplusplus) && (__cplusplus >= 201103L)) || \
+ JSON_HEDLEY_MSVC_VERSION_CHECK(16,0,0)
+# define JSON_HEDLEY_STATIC_ASSERT(expr, message) JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(static_assert(expr, message))
+#else
+# define JSON_HEDLEY_STATIC_ASSERT(expr, message)
+#endif
-/*!
-@brief exception indicating access out of the defined range
+#if defined(JSON_HEDLEY_NULL)
+ #undef JSON_HEDLEY_NULL
+#endif
+#if defined(__cplusplus)
+ #if __cplusplus >= 201103L
+ #define JSON_HEDLEY_NULL JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_(nullptr)
+ #elif defined(NULL)
+ #define JSON_HEDLEY_NULL NULL
+ #else
+ #define JSON_HEDLEY_NULL JSON_HEDLEY_STATIC_CAST(void*, 0)
+ #endif
+#elif defined(NULL)
+ #define JSON_HEDLEY_NULL NULL
+#else
+ #define JSON_HEDLEY_NULL ((void*) 0)
+#endif
-This exception is thrown in case a library function is called on an input
-parameter that exceeds the expected range, for instance in case of array
-indices or nonexisting object keys.
+#if defined(JSON_HEDLEY_MESSAGE)
+ #undef JSON_HEDLEY_MESSAGE
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-pragmas")
+# define JSON_HEDLEY_MESSAGE(msg) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS \
+ JSON_HEDLEY_PRAGMA(message msg) \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+#elif \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,4,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+# define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(message msg)
+#elif JSON_HEDLEY_CRAY_VERSION_CHECK(5,0,0)
+# define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(_CRI message msg)
+#elif JSON_HEDLEY_IAR_VERSION_CHECK(8,0,0)
+# define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(message(msg))
+#elif JSON_HEDLEY_PELLES_VERSION_CHECK(2,0,0)
+# define JSON_HEDLEY_MESSAGE(msg) JSON_HEDLEY_PRAGMA(message(msg))
+#else
+# define JSON_HEDLEY_MESSAGE(msg)
+#endif
-Exceptions have ids 4xx.
+#if defined(JSON_HEDLEY_WARNING)
+ #undef JSON_HEDLEY_WARNING
+#endif
+#if JSON_HEDLEY_HAS_WARNING("-Wunknown-pragmas")
+# define JSON_HEDLEY_WARNING(msg) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS \
+ JSON_HEDLEY_PRAGMA(clang warning msg) \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+#elif \
+ JSON_HEDLEY_GCC_VERSION_CHECK(4,8,0) || \
+ JSON_HEDLEY_PGI_VERSION_CHECK(18,4,0) || \
+ JSON_HEDLEY_INTEL_VERSION_CHECK(13,0,0)
+# define JSON_HEDLEY_WARNING(msg) JSON_HEDLEY_PRAGMA(GCC warning msg)
+#elif JSON_HEDLEY_MSVC_VERSION_CHECK(15,0,0)
+# define JSON_HEDLEY_WARNING(msg) JSON_HEDLEY_PRAGMA(message(msg))
+#else
+# define JSON_HEDLEY_WARNING(msg) JSON_HEDLEY_MESSAGE(msg)
+#endif
-name / id | example message | description
-------------------------------- | --------------- | -------------------------
-json.exception.out_of_range.401 | array index 3 is out of range | The provided array index @a i is larger than @a size-1.
-json.exception.out_of_range.402 | array index '-' (3) is out of range | The special array index `-` in a JSON Pointer never describes a valid element of the array, but the index past the end. That is, it can only be used to add elements at this position, but not to read it.
-json.exception.out_of_range.403 | key 'foo' not found | The provided key was not found in the JSON object.
-json.exception.out_of_range.404 | unresolved reference token 'foo' | A reference token in a JSON Pointer could not be resolved.
-json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch operations 'remove' and 'add' can not be applied to the root element of the JSON value.
-json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF.
-json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON only supports integers numbers up to 9223372036854775807. |
-json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. |
+#if defined(JSON_HEDLEY_REQUIRE)
+ #undef JSON_HEDLEY_REQUIRE
+#endif
+#if defined(JSON_HEDLEY_REQUIRE_MSG)
+ #undef JSON_HEDLEY_REQUIRE_MSG
+#endif
+#if JSON_HEDLEY_HAS_ATTRIBUTE(diagnose_if)
+# if JSON_HEDLEY_HAS_WARNING("-Wgcc-compat")
+# define JSON_HEDLEY_REQUIRE(expr) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("clang diagnostic ignored \"-Wgcc-compat\"") \
+ __attribute__((diagnose_if(!(expr), #expr, "error"))) \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+# define JSON_HEDLEY_REQUIRE_MSG(expr,msg) \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("clang diagnostic ignored \"-Wgcc-compat\"") \
+ __attribute__((diagnose_if(!(expr), msg, "error"))) \
+ JSON_HEDLEY_DIAGNOSTIC_POP
+# else
+# define JSON_HEDLEY_REQUIRE(expr) __attribute__((diagnose_if(!(expr), #expr, "error")))
+# define JSON_HEDLEY_REQUIRE_MSG(expr,msg) __attribute__((diagnose_if(!(expr), msg, "error")))
+# endif
+#else
+# define JSON_HEDLEY_REQUIRE(expr)
+# define JSON_HEDLEY_REQUIRE_MSG(expr,msg)
+#endif
-@liveexample{The following code shows how an `out_of_range` exception can be
-caught.,out_of_range}
+#if defined(JSON_HEDLEY_FLAGS)
+ #undef JSON_HEDLEY_FLAGS
+#endif
+#if JSON_HEDLEY_HAS_ATTRIBUTE(flag_enum)
+ #define JSON_HEDLEY_FLAGS __attribute__((__flag_enum__))
+#endif
-@sa @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref type_error for exceptions indicating executing a member function with
- a wrong type
-@sa @ref other_error for exceptions indicating other library errors
+#if defined(JSON_HEDLEY_FLAGS_CAST)
+ #undef JSON_HEDLEY_FLAGS_CAST
+#endif
+#if JSON_HEDLEY_INTEL_VERSION_CHECK(19,0,0)
+# define JSON_HEDLEY_FLAGS_CAST(T, expr) (__extension__ ({ \
+ JSON_HEDLEY_DIAGNOSTIC_PUSH \
+ _Pragma("warning(disable:188)") \
+ ((T) (expr)); \
+ JSON_HEDLEY_DIAGNOSTIC_POP \
+ }))
+#else
+# define JSON_HEDLEY_FLAGS_CAST(T, expr) JSON_HEDLEY_STATIC_CAST(T, expr)
+#endif
-@since version 3.0.0
-*/
-class out_of_range : public exception
-{
- public:
- static out_of_range create(int id_, const std::string& what_arg)
- {
- std::string w = exception::name("out_of_range", id_) + what_arg;
- return out_of_range(id_, w.c_str());
- }
+#if defined(JSON_HEDLEY_EMPTY_BASES)
+ #undef JSON_HEDLEY_EMPTY_BASES
+#endif
+#if JSON_HEDLEY_MSVC_VERSION_CHECK(19,0,23918) && !JSON_HEDLEY_MSVC_VERSION_CHECK(20,0,0)
+ #define JSON_HEDLEY_EMPTY_BASES __declspec(empty_bases)
+#else
+ #define JSON_HEDLEY_EMPTY_BASES
+#endif
- private:
- out_of_range(int id_, const char* what_arg) : exception(id_, what_arg) {}
-};
+/* Remaining macros are deprecated. */
-/*!
-@brief exception indicating other library errors
+#if defined(JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK)
+ #undef JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK
+#endif
+#if defined(__clang__)
+ #define JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK(major,minor,patch) (0)
+#else
+ #define JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK(major,minor,patch) JSON_HEDLEY_GCC_VERSION_CHECK(major,minor,patch)
+#endif
-This exception is thrown in case of errors that cannot be classified with the
-other exception types.
+#if defined(JSON_HEDLEY_CLANG_HAS_ATTRIBUTE)
+ #undef JSON_HEDLEY_CLANG_HAS_ATTRIBUTE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_ATTRIBUTE(attribute) JSON_HEDLEY_HAS_ATTRIBUTE(attribute)
-Exceptions have ids 5xx.
+#if defined(JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE)
+ #undef JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE(attribute) JSON_HEDLEY_HAS_CPP_ATTRIBUTE(attribute)
-name / id | example message | description
------------------------------- | --------------- | -------------------------
-json.exception.other_error.501 | unsuccessful: {"op":"test","path":"/baz", "value":"bar"} | A JSON Patch operation 'test' failed. The unsuccessful operation is also printed.
+#if defined(JSON_HEDLEY_CLANG_HAS_BUILTIN)
+ #undef JSON_HEDLEY_CLANG_HAS_BUILTIN
+#endif
+#define JSON_HEDLEY_CLANG_HAS_BUILTIN(builtin) JSON_HEDLEY_HAS_BUILTIN(builtin)
-@sa @ref exception for the base class of the library exceptions
-@sa @ref parse_error for exceptions indicating a parse error
-@sa @ref invalid_iterator for exceptions indicating errors with iterators
-@sa @ref type_error for exceptions indicating executing a member function with
- a wrong type
-@sa @ref out_of_range for exceptions indicating access out of the defined range
+#if defined(JSON_HEDLEY_CLANG_HAS_FEATURE)
+ #undef JSON_HEDLEY_CLANG_HAS_FEATURE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_FEATURE(feature) JSON_HEDLEY_HAS_FEATURE(feature)
-@liveexample{The following code shows how an `other_error` exception can be
-caught.,other_error}
+#if defined(JSON_HEDLEY_CLANG_HAS_EXTENSION)
+ #undef JSON_HEDLEY_CLANG_HAS_EXTENSION
+#endif
+#define JSON_HEDLEY_CLANG_HAS_EXTENSION(extension) JSON_HEDLEY_HAS_EXTENSION(extension)
-@since version 3.0.0
-*/
-class other_error : public exception
-{
- public:
- static other_error create(int id_, const std::string& what_arg)
- {
- std::string w = exception::name("other_error", id_) + what_arg;
- return other_error(id_, w.c_str());
- }
+#if defined(JSON_HEDLEY_CLANG_HAS_DECLSPEC_DECLSPEC_ATTRIBUTE)
+ #undef JSON_HEDLEY_CLANG_HAS_DECLSPEC_DECLSPEC_ATTRIBUTE
+#endif
+#define JSON_HEDLEY_CLANG_HAS_DECLSPEC_ATTRIBUTE(attribute) JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE(attribute)
- private:
- other_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
-};
-}
-}
+#if defined(JSON_HEDLEY_CLANG_HAS_WARNING)
+ #undef JSON_HEDLEY_CLANG_HAS_WARNING
+#endif
+#define JSON_HEDLEY_CLANG_HAS_WARNING(warning) JSON_HEDLEY_HAS_WARNING(warning)
-// #include <nlohmann/detail/value_t.hpp>
+#endif /* !defined(JSON_HEDLEY_VERSION) || (JSON_HEDLEY_VERSION < X) */
-#include <array> // array
-#include <ciso646> // and
-#include <cstddef> // size_t
-#include <cstdint> // uint8_t
+// This file contains all internal macro definitions
+// You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them
-namespace nlohmann
-{
-namespace detail
-{
-///////////////////////////
-// JSON type enumeration //
-///////////////////////////
+// exclude unsupported compilers
+#if !defined(JSON_SKIP_UNSUPPORTED_COMPILER_CHECK)
+ #if defined(__clang__)
+ #if (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__) < 30400
+ #error "unsupported Clang version - see https://github.com/nlohmann/json#supported-compilers"
+ #endif
+ #elif defined(__GNUC__) && !(defined(__ICC) || defined(__INTEL_COMPILER))
+ #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40800
+ #error "unsupported GCC version - see https://github.com/nlohmann/json#supported-compilers"
+ #endif
+ #endif
+#endif
-/*!
-@brief the JSON type enumeration
+// C++ language standard detection
+#if (defined(__cplusplus) && __cplusplus >= 201703L) || (defined(_HAS_CXX17) && _HAS_CXX17 == 1) // fix for issue #464
+ #define JSON_HAS_CPP_17
+ #define JSON_HAS_CPP_14
+#elif (defined(__cplusplus) && __cplusplus >= 201402L) || (defined(_HAS_CXX14) && _HAS_CXX14 == 1)
+ #define JSON_HAS_CPP_14
+#endif
-This enumeration collects the different JSON types. It is internally used to
-distinguish the stored values, and the functions @ref basic_json::is_null(),
-@ref basic_json::is_object(), @ref basic_json::is_array(),
-@ref basic_json::is_string(), @ref basic_json::is_boolean(),
-@ref basic_json::is_number() (with @ref basic_json::is_number_integer(),
-@ref basic_json::is_number_unsigned(), and @ref basic_json::is_number_float()),
-@ref basic_json::is_discarded(), @ref basic_json::is_primitive(), and
-@ref basic_json::is_structured() rely on it.
+// disable float-equal warnings on GCC/clang
+#if defined(__clang__) || defined(__GNUC__) || defined(__GNUG__)
+ #pragma GCC diagnostic push
+ #pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
-@note There are three enumeration entries (number_integer, number_unsigned, and
-number_float), because the library distinguishes these three types for numbers:
-@ref basic_json::number_unsigned_t is used for unsigned integers,
-@ref basic_json::number_integer_t is used for signed integers, and
-@ref basic_json::number_float_t is used for floating-point numbers or to
-approximate integers which do not fit in the limits of their respective type.
+// disable documentation warnings on clang
+#if defined(__clang__)
+ #pragma GCC diagnostic push
+ #pragma GCC diagnostic ignored "-Wdocumentation"
+#endif
-@sa @ref basic_json::basic_json(const value_t value_type) -- create a JSON
-value with the default value for a given type
+// allow to disable exceptions
+#if (defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND)) && !defined(JSON_NOEXCEPTION)
+ #define JSON_THROW(exception) throw exception
+ #define JSON_TRY try
+ #define JSON_CATCH(exception) catch(exception)
+ #define JSON_INTERNAL_CATCH(exception) catch(exception)
+#else
+ #include <cstdlib>
+ #define JSON_THROW(exception) std::abort()
+ #define JSON_TRY if(true)
+ #define JSON_CATCH(exception) if(false)
+ #define JSON_INTERNAL_CATCH(exception) if(false)
+#endif
-@since version 1.0.0
-*/
-enum class value_t : std::uint8_t
-{
- null, ///< null value
- object, ///< object (unordered set of name/value pairs)
- array, ///< array (ordered collection of values)
- string, ///< string value
- boolean, ///< boolean value
- number_integer, ///< number value (signed integer)
- number_unsigned, ///< number value (unsigned integer)
- number_float, ///< number value (floating-point)
- discarded ///< discarded by the the parser callback function
-};
+// override exception macros
+#if defined(JSON_THROW_USER)
+ #undef JSON_THROW
+ #define JSON_THROW JSON_THROW_USER
+#endif
+#if defined(JSON_TRY_USER)
+ #undef JSON_TRY
+ #define JSON_TRY JSON_TRY_USER
+#endif
+#if defined(JSON_CATCH_USER)
+ #undef JSON_CATCH
+ #define JSON_CATCH JSON_CATCH_USER
+ #undef JSON_INTERNAL_CATCH
+ #define JSON_INTERNAL_CATCH JSON_CATCH_USER
+#endif
+#if defined(JSON_INTERNAL_CATCH_USER)
+ #undef JSON_INTERNAL_CATCH
+ #define JSON_INTERNAL_CATCH JSON_INTERNAL_CATCH_USER
+#endif
/*!
-@brief comparison operator for JSON types
-
-Returns an ordering that is similar to Python:
-- order: null < boolean < number < object < array < string
-- furthermore, each type is not smaller than itself
-- discarded values are not comparable
-
-@since version 1.0.0
+@brief macro to briefly define a mapping between an enum and JSON
+@def NLOHMANN_JSON_SERIALIZE_ENUM
+@since version 3.4.0
*/
-inline bool operator<(const value_t lhs, const value_t rhs) noexcept
-{
- static constexpr std::array<std::uint8_t, 8> order = {{
- 0 /* null */, 3 /* object */, 4 /* array */, 5 /* string */,
- 1 /* boolean */, 2 /* integer */, 2 /* unsigned */, 2 /* float */
- }
- };
-
- const auto l_index = static_cast<std::size_t>(lhs);
- const auto r_index = static_cast<std::size_t>(rhs);
- return l_index < order.size() and r_index < order.size() and order[l_index] < order[r_index];
-}
-}
-}
-
-// #include <nlohmann/detail/conversions/from_json.hpp>
-
-
-#include <algorithm> // transform
-#include <array> // array
-#include <ciso646> // and, not
-#include <forward_list> // forward_list
-#include <iterator> // inserter, front_inserter, end
-#include <string> // string
-#include <tuple> // tuple, make_tuple
-#include <type_traits> // is_arithmetic, is_same, is_enum, underlying_type, is_convertible
-#include <utility> // pair, declval
-#include <valarray> // valarray
-
-// #include <nlohmann/detail/exceptions.hpp>
+#define NLOHMANN_JSON_SERIALIZE_ENUM(ENUM_TYPE, ...) \
+ template<typename BasicJsonType> \
+ inline void to_json(BasicJsonType& j, const ENUM_TYPE& e) \
+ { \
+ static_assert(std::is_enum<ENUM_TYPE>::value, #ENUM_TYPE " must be an enum!"); \
+ static const std::pair<ENUM_TYPE, BasicJsonType> m[] = __VA_ARGS__; \
+ auto it = std::find_if(std::begin(m), std::end(m), \
+ [e](const std::pair<ENUM_TYPE, BasicJsonType>& ej_pair) -> bool \
+ { \
+ return ej_pair.first == e; \
+ }); \
+ j = ((it != std::end(m)) ? it : std::begin(m))->second; \
+ } \
+ template<typename BasicJsonType> \
+ inline void from_json(const BasicJsonType& j, ENUM_TYPE& e) \
+ { \
+ static_assert(std::is_enum<ENUM_TYPE>::value, #ENUM_TYPE " must be an enum!"); \
+ static const std::pair<ENUM_TYPE, BasicJsonType> m[] = __VA_ARGS__; \
+ auto it = std::find_if(std::begin(m), std::end(m), \
+ [&j](const std::pair<ENUM_TYPE, BasicJsonType>& ej_pair) -> bool \
+ { \
+ return ej_pair.second == j; \
+ }); \
+ e = ((it != std::end(m)) ? it : std::begin(m))->first; \
+ }
-// #include <nlohmann/detail/macro_scope.hpp>
+// Ugly macros to avoid uglier copy-paste when specializing basic_json. They
+// may be removed in the future once the class is split.
-// #include <nlohmann/detail/meta.hpp>
+#define NLOHMANN_BASIC_JSON_TPL_DECLARATION \
+ template<template<typename, typename, typename...> class ObjectType, \
+ template<typename, typename...> class ArrayType, \
+ class StringType, class BooleanType, class NumberIntegerType, \
+ class NumberUnsignedType, class NumberFloatType, \
+ template<typename> class AllocatorType, \
+ template<typename, typename = void> class JSONSerializer, \
+ class BinaryType>
-// #include <nlohmann/detail/value_t.hpp>
+#define NLOHMANN_BASIC_JSON_TPL \
+ basic_json<ObjectType, ArrayType, StringType, BooleanType, \
+ NumberIntegerType, NumberUnsignedType, NumberFloatType, \
+ AllocatorType, JSONSerializer, BinaryType>
namespace nlohmann
{
namespace detail
{
-// overloads for basic_json template parameters
-template<typename BasicJsonType, typename ArithmeticType,
- enable_if_t<std::is_arithmetic<ArithmeticType>::value and
- not std::is_same<ArithmeticType, typename BasicJsonType::boolean_t>::value,
- int> = 0>
-void get_arithmetic_value(const BasicJsonType& j, ArithmeticType& val)
-{
- switch (static_cast<value_t>(j))
- {
- case value_t::number_unsigned:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_unsigned_t*>());
- break;
- }
- case value_t::number_integer:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_integer_t*>());
- break;
- }
- case value_t::number_float:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_float_t*>());
- break;
- }
+////////////////
+// exceptions //
+////////////////
- default:
- JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name())));
- }
-}
+/*!
+@brief general exception of the @ref basic_json class
-template<typename BasicJsonType>
-void from_json(const BasicJsonType& j, typename BasicJsonType::boolean_t& b)
+This class is an extension of `std::exception` objects with a member @a id for
+exception ids. It is used as the base class for all exceptions thrown by the
+@ref basic_json class. This class can hence be used as "wildcard" to catch
+exceptions.
+
+Subclasses:
+- @ref parse_error for exceptions indicating a parse error
+- @ref invalid_iterator for exceptions indicating errors with iterators
+- @ref type_error for exceptions indicating executing a member function with
+ a wrong type
+- @ref out_of_range for exceptions indicating access out of the defined range
+- @ref other_error for exceptions indicating other library errors
+
+@internal
+@note To have nothrow-copy-constructible exceptions, we internally use
+ `std::runtime_error` which can cope with arbitrary-length error messages.
+ Intermediate strings are built with static functions and then passed to
+ the actual constructor.
+@endinternal
+
+@liveexample{The following code shows how arbitrary library exceptions can be
+caught.,exception}
+
+@since version 3.0.0
+*/
+class exception : public std::exception
{
- if (JSON_UNLIKELY(not j.is_boolean()))
+ public:
+ /// returns the explanatory string
+ JSON_HEDLEY_RETURNS_NON_NULL
+ const char* what() const noexcept override
{
- JSON_THROW(type_error::create(302, "type must be boolean, but is " + std::string(j.type_name())));
+ return m.what();
}
- b = *j.template get_ptr<const typename BasicJsonType::boolean_t*>();
-}
-template<typename BasicJsonType>
-void from_json(const BasicJsonType& j, typename BasicJsonType::string_t& s)
-{
- if (JSON_UNLIKELY(not j.is_string()))
+ /// the id of the exception
+ const int id;
+
+ protected:
+ JSON_HEDLEY_NON_NULL(3)
+ exception(int id_, const char* what_arg) : id(id_), m(what_arg) {}
+
+ static std::string name(const std::string& ename, int id_)
{
- JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name())));
+ return "[json.exception." + ename + "." + std::to_string(id_) + "] ";
}
- s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
-}
-template<typename BasicJsonType>
-void from_json(const BasicJsonType& j, typename BasicJsonType::number_float_t& val)
-{
- get_arithmetic_value(j, val);
-}
+ private:
+ /// an exception object as storage for error messages
+ std::runtime_error m;
+};
-template<typename BasicJsonType>
-void from_json(const BasicJsonType& j, typename BasicJsonType::number_unsigned_t& val)
-{
- get_arithmetic_value(j, val);
-}
+/*!
+@brief exception indicating a parse error
-template<typename BasicJsonType>
-void from_json(const BasicJsonType& j, typename BasicJsonType::number_integer_t& val)
-{
- get_arithmetic_value(j, val);
-}
+This exception is thrown by the library when a parse error occurs. Parse errors
+can occur during the deserialization of JSON text, CBOR, MessagePack, as well
+as when using JSON Patch.
-template<typename BasicJsonType, typename EnumType,
- enable_if_t<std::is_enum<EnumType>::value, int> = 0>
-void from_json(const BasicJsonType& j, EnumType& e)
-{
- typename std::underlying_type<EnumType>::type val;
- get_arithmetic_value(j, val);
- e = static_cast<EnumType>(val);
-}
+Member @a byte holds the byte index of the last read character in the input
+file.
-template<typename BasicJsonType>
-void from_json(const BasicJsonType& j, typename BasicJsonType::array_t& arr)
-{
- if (JSON_UNLIKELY(not j.is_array()))
- {
- JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
- }
- arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
-}
+Exceptions have ids 1xx.
-// forward_list doesn't have an insert method
-template<typename BasicJsonType, typename T, typename Allocator,
- enable_if_t<std::is_convertible<BasicJsonType, T>::value, int> = 0>
-void from_json(const BasicJsonType& j, std::forward_list<T, Allocator>& l)
+name / id | example message | description
+------------------------------ | --------------- | -------------------------
+json.exception.parse_error.101 | parse error at 2: unexpected end of input; expected string literal | This error indicates a syntax error while deserializing a JSON text. The error message describes that an unexpected token (character) was encountered, and the member @a byte indicates the error position.
+json.exception.parse_error.102 | parse error at 14: missing or wrong low surrogate | JSON uses the `\uxxxx` format to describe Unicode characters. Code points above above 0xFFFF are split into two `\uxxxx` entries ("surrogate pairs"). This error indicates that the surrogate pair is incomplete or contains an invalid code point.
+json.exception.parse_error.103 | parse error: code points above 0x10FFFF are invalid | Unicode supports code points up to 0x10FFFF. Code points above 0x10FFFF are invalid.
+json.exception.parse_error.104 | parse error: JSON patch must be an array of objects | [RFC 6902](https://tools.ietf.org/html/rfc6902) requires a JSON Patch document to be a JSON document that represents an array of objects.
+json.exception.parse_error.105 | parse error: operation must have string member 'op' | An operation of a JSON Patch document must contain exactly one "op" member, whose value indicates the operation to perform. Its value must be one of "add", "remove", "replace", "move", "copy", or "test"; other values are errors.
+json.exception.parse_error.106 | parse error: array index '01' must not begin with '0' | An array index in a JSON Pointer ([RFC 6901](https://tools.ietf.org/html/rfc6901)) may be `0` or any number without a leading `0`.
+json.exception.parse_error.107 | parse error: JSON pointer must be empty or begin with '/' - was: 'foo' | A JSON Pointer must be a Unicode string containing a sequence of zero or more reference tokens, each prefixed by a `/` character.
+json.exception.parse_error.108 | parse error: escape character '~' must be followed with '0' or '1' | In a JSON Pointer, only `~0` and `~1` are valid escape sequences.
+json.exception.parse_error.109 | parse error: array index 'one' is not a number | A JSON Pointer array index must be a number.
+json.exception.parse_error.110 | parse error at 1: cannot read 2 bytes from vector | When parsing CBOR or MessagePack, the byte vector ends before the complete value has been read.
+json.exception.parse_error.112 | parse error at 1: error reading CBOR; last byte: 0xF8 | Not all types of CBOR or MessagePack are supported. This exception occurs if an unsupported byte was read.
+json.exception.parse_error.113 | parse error at 2: expected a CBOR string; last byte: 0x98 | While parsing a map key, a value that is not a string has been read.
+json.exception.parse_error.114 | parse error: Unsupported BSON record type 0x0F | The parsing of the corresponding BSON record type is not implemented (yet).
+
+@note For an input with n bytes, 1 is the index of the first character and n+1
+ is the index of the terminating null byte or the end of file. This also
+ holds true when reading a byte vector (CBOR or MessagePack).
+
+@liveexample{The following code shows how a `parse_error` exception can be
+caught.,parse_error}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref type_error for exceptions indicating executing a member function with
+ a wrong type
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class parse_error : public exception
{
- if (JSON_UNLIKELY(not j.is_array()))
+ public:
+ /*!
+ @brief create a parse error exception
+ @param[in] id_ the id of the exception
+ @param[in] pos the position where the error occurred (or with
+ chars_read_total=0 if the position cannot be
+ determined)
+ @param[in] what_arg the explanatory string
+ @return parse_error object
+ */
+ static parse_error create(int id_, const position_t& pos, const std::string& what_arg)
{
- JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+ std::string w = exception::name("parse_error", id_) + "parse error" +
+ position_string(pos) + ": " + what_arg;
+ return parse_error(id_, pos.chars_read_total, w.c_str());
}
- std::transform(j.rbegin(), j.rend(),
- std::front_inserter(l), [](const BasicJsonType & i)
- {
- return i.template get<T>();
- });
-}
-// valarray doesn't have an insert method
-template<typename BasicJsonType, typename T,
- enable_if_t<std::is_convertible<BasicJsonType, T>::value, int> = 0>
-void from_json(const BasicJsonType& j, std::valarray<T>& l)
-{
- if (JSON_UNLIKELY(not j.is_array()))
+ static parse_error create(int id_, std::size_t byte_, const std::string& what_arg)
{
- JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+ std::string w = exception::name("parse_error", id_) + "parse error" +
+ (byte_ != 0 ? (" at byte " + std::to_string(byte_)) : "") +
+ ": " + what_arg;
+ return parse_error(id_, byte_, w.c_str());
}
- l.resize(j.size());
- std::copy(j.m_value.array->begin(), j.m_value.array->end(), std::begin(l));
-}
-template<typename BasicJsonType, typename CompatibleArrayType>
-void from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, priority_tag<0> /*unused*/)
-{
- using std::end;
+ /*!
+ @brief byte index of the parse error
- std::transform(j.begin(), j.end(),
- std::inserter(arr, end(arr)), [](const BasicJsonType & i)
- {
- // get<BasicJsonType>() returns *this, this won't call a from_json
- // method when value_type is BasicJsonType
- return i.template get<typename CompatibleArrayType::value_type>();
- });
-}
+ The byte index of the last read character in the input file.
-template<typename BasicJsonType, typename CompatibleArrayType>
-auto from_json_array_impl(const BasicJsonType& j, CompatibleArrayType& arr, priority_tag<1> /*unused*/)
--> decltype(
- arr.reserve(std::declval<typename CompatibleArrayType::size_type>()),
- void())
-{
- using std::end;
+ @note For an input with n bytes, 1 is the index of the first character and
+ n+1 is the index of the terminating null byte or the end of file.
+ This also holds true when reading a byte vector (CBOR or MessagePack).
+ */
+ const std::size_t byte;
- arr.reserve(j.size());
- std::transform(j.begin(), j.end(),
- std::inserter(arr, end(arr)), [](const BasicJsonType & i)
- {
- // get<BasicJsonType>() returns *this, this won't call a from_json
- // method when value_type is BasicJsonType
- return i.template get<typename CompatibleArrayType::value_type>();
- });
-}
+ private:
+ parse_error(int id_, std::size_t byte_, const char* what_arg)
+ : exception(id_, what_arg), byte(byte_) {}
-template<typename BasicJsonType, typename T, std::size_t N>
-void from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr, priority_tag<2> /*unused*/)
-{
- for (std::size_t i = 0; i < N; ++i)
+ static std::string position_string(const position_t& pos)
{
- arr[i] = j.at(i).template get<T>();
+ return " at line " + std::to_string(pos.lines_read + 1) +
+ ", column " + std::to_string(pos.chars_read_current_line);
}
-}
+};
-template <
- typename BasicJsonType, typename CompatibleArrayType,
- enable_if_t <
- is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value and
- not std::is_same<typename BasicJsonType::array_t,
- CompatibleArrayType>::value and
- std::is_constructible <
- BasicJsonType, typename CompatibleArrayType::value_type >::value,
- int > = 0 >
-void from_json(const BasicJsonType& j, CompatibleArrayType& arr)
-{
- if (JSON_UNLIKELY(not j.is_array()))
- {
- JSON_THROW(type_error::create(302, "type must be array, but is " +
- std::string(j.type_name())));
- }
+/*!
+@brief exception indicating errors with iterators
- from_json_array_impl(j, arr, priority_tag<2> {});
-}
+This exception is thrown if iterators passed to a library function do not match
+the expected semantics.
-template<typename BasicJsonType, typename CompatibleObjectType,
- enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value, int> = 0>
-void from_json(const BasicJsonType& j, CompatibleObjectType& obj)
+Exceptions have ids 2xx.
+
+name / id | example message | description
+----------------------------------- | --------------- | -------------------------
+json.exception.invalid_iterator.201 | iterators are not compatible | The iterators passed to constructor @ref basic_json(InputIT first, InputIT last) are not compatible, meaning they do not belong to the same container. Therefore, the range (@a first, @a last) is invalid.
+json.exception.invalid_iterator.202 | iterator does not fit current value | In an erase or insert function, the passed iterator @a pos does not belong to the JSON value for which the function was called. It hence does not define a valid position for the deletion/insertion.
+json.exception.invalid_iterator.203 | iterators do not fit current value | Either iterator passed to function @ref erase(IteratorType first, IteratorType last) does not belong to the JSON value from which values shall be erased. It hence does not define a valid range to delete values from.
+json.exception.invalid_iterator.204 | iterators out of range | When an iterator range for a primitive type (number, boolean, or string) is passed to a constructor or an erase function, this range has to be exactly (@ref begin(), @ref end()), because this is the only way the single stored value is expressed. All other ranges are invalid.
+json.exception.invalid_iterator.205 | iterator out of range | When an iterator for a primitive type (number, boolean, or string) is passed to an erase function, the iterator has to be the @ref begin() iterator, because it is the only way to address the stored value. All other iterators are invalid.
+json.exception.invalid_iterator.206 | cannot construct with iterators from null | The iterators passed to constructor @ref basic_json(InputIT first, InputIT last) belong to a JSON null value and hence to not define a valid range.
+json.exception.invalid_iterator.207 | cannot use key() for non-object iterators | The key() member function can only be used on iterators belonging to a JSON object, because other types do not have a concept of a key.
+json.exception.invalid_iterator.208 | cannot use operator[] for object iterators | The operator[] to specify a concrete offset cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
+json.exception.invalid_iterator.209 | cannot use offsets with object iterators | The offset operators (+, -, +=, -=) cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
+json.exception.invalid_iterator.210 | iterators do not fit | The iterator range passed to the insert function are not compatible, meaning they do not belong to the same container. Therefore, the range (@a first, @a last) is invalid.
+json.exception.invalid_iterator.211 | passed iterators may not belong to container | The iterator range passed to the insert function must not be a subrange of the container to insert to.
+json.exception.invalid_iterator.212 | cannot compare iterators of different containers | When two iterators are compared, they must belong to the same container.
+json.exception.invalid_iterator.213 | cannot compare order of object iterators | The order of object iterators cannot be compared, because JSON objects are unordered.
+json.exception.invalid_iterator.214 | cannot get value | Cannot get value for iterator: Either the iterator belongs to a null value or it is an iterator to a primitive type (number, boolean, or string), but the iterator is different to @ref begin().
+
+@liveexample{The following code shows how an `invalid_iterator` exception can be
+caught.,invalid_iterator}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref type_error for exceptions indicating executing a member function with
+ a wrong type
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class invalid_iterator : public exception
{
- if (JSON_UNLIKELY(not j.is_object()))
+ public:
+ static invalid_iterator create(int id_, const std::string& what_arg)
{
- JSON_THROW(type_error::create(302, "type must be object, but is " + std::string(j.type_name())));
+ std::string w = exception::name("invalid_iterator", id_) + what_arg;
+ return invalid_iterator(id_, w.c_str());
}
- auto inner_object = j.template get_ptr<const typename BasicJsonType::object_t*>();
- using value_type = typename CompatibleObjectType::value_type;
- std::transform(
- inner_object->begin(), inner_object->end(),
- std::inserter(obj, obj.begin()),
- [](typename BasicJsonType::object_t::value_type const & p)
- {
- return value_type(p.first, p.second.template get<typename CompatibleObjectType::mapped_type>());
- });
-}
+ private:
+ JSON_HEDLEY_NON_NULL(3)
+ invalid_iterator(int id_, const char* what_arg)
+ : exception(id_, what_arg) {}
+};
-// overload for arithmetic types, not chosen for basic_json template arguments
-// (BooleanType, etc..); note: Is it really necessary to provide explicit
-// overloads for boolean_t etc. in case of a custom BooleanType which is not
-// an arithmetic type?
-template<typename BasicJsonType, typename ArithmeticType,
- enable_if_t <
- std::is_arithmetic<ArithmeticType>::value and
- not std::is_same<ArithmeticType, typename BasicJsonType::number_unsigned_t>::value and
- not std::is_same<ArithmeticType, typename BasicJsonType::number_integer_t>::value and
- not std::is_same<ArithmeticType, typename BasicJsonType::number_float_t>::value and
- not std::is_same<ArithmeticType, typename BasicJsonType::boolean_t>::value,
- int> = 0>
-void from_json(const BasicJsonType& j, ArithmeticType& val)
-{
- switch (static_cast<value_t>(j))
- {
- case value_t::number_unsigned:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_unsigned_t*>());
- break;
- }
- case value_t::number_integer:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_integer_t*>());
- break;
- }
- case value_t::number_float:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_float_t*>());
- break;
- }
- case value_t::boolean:
- {
- val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::boolean_t*>());
- break;
- }
+/*!
+@brief exception indicating executing a member function with a wrong type
- default:
- JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name())));
- }
-}
+This exception is thrown in case of a type error; that is, a library function is
+executed on a JSON value whose type does not match the expected semantics.
-template<typename BasicJsonType, typename A1, typename A2>
-void from_json(const BasicJsonType& j, std::pair<A1, A2>& p)
-{
- p = {j.at(0).template get<A1>(), j.at(1).template get<A2>()};
-}
+Exceptions have ids 3xx.
-template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
-void from_json_tuple_impl(const BasicJsonType& j, Tuple& t, index_sequence<Idx...>)
-{
- t = std::make_tuple(j.at(Idx).template get<typename std::tuple_element<Idx, Tuple>::type>()...);
-}
+name / id | example message | description
+----------------------------- | --------------- | -------------------------
+json.exception.type_error.301 | cannot create object from initializer list | To create an object from an initializer list, the initializer list must consist only of a list of pairs whose first element is a string. When this constraint is violated, an array is created instead.
+json.exception.type_error.302 | type must be object, but is array | During implicit or explicit value conversion, the JSON type must be compatible to the target type. For instance, a JSON string can only be converted into string types, but not into numbers or boolean types.
+json.exception.type_error.303 | incompatible ReferenceType for get_ref, actual type is object | To retrieve a reference to a value stored in a @ref basic_json object with @ref get_ref, the type of the reference must match the value type. For instance, for a JSON array, the @a ReferenceType must be @ref array_t &.
+json.exception.type_error.304 | cannot use at() with string | The @ref at() member functions can only be executed for certain JSON types.
+json.exception.type_error.305 | cannot use operator[] with string | The @ref operator[] member functions can only be executed for certain JSON types.
+json.exception.type_error.306 | cannot use value() with string | The @ref value() member functions can only be executed for certain JSON types.
+json.exception.type_error.307 | cannot use erase() with string | The @ref erase() member functions can only be executed for certain JSON types.
+json.exception.type_error.308 | cannot use push_back() with string | The @ref push_back() and @ref operator+= member functions can only be executed for certain JSON types.
+json.exception.type_error.309 | cannot use insert() with | The @ref insert() member functions can only be executed for certain JSON types.
+json.exception.type_error.310 | cannot use swap() with number | The @ref swap() member functions can only be executed for certain JSON types.
+json.exception.type_error.311 | cannot use emplace_back() with string | The @ref emplace_back() member function can only be executed for certain JSON types.
+json.exception.type_error.312 | cannot use update() with string | The @ref update() member functions can only be executed for certain JSON types.
+json.exception.type_error.313 | invalid value to unflatten | The @ref unflatten function converts an object whose keys are JSON Pointers back into an arbitrary nested JSON value. The JSON Pointers must not overlap, because then the resulting value would not be well defined.
+json.exception.type_error.314 | only objects can be unflattened | The @ref unflatten function only works for an object whose keys are JSON Pointers.
+json.exception.type_error.315 | values in object must be primitive | The @ref unflatten function only works for an object whose keys are JSON Pointers and whose values are primitive.
+json.exception.type_error.316 | invalid UTF-8 byte at index 10: 0x7E | The @ref dump function only works with UTF-8 encoded strings; that is, if you assign a `std::string` to a JSON value, make sure it is UTF-8 encoded. |
+json.exception.type_error.317 | JSON value cannot be serialized to requested format | The dynamic type of the object cannot be represented in the requested serialization format (e.g. a raw `true` or `null` JSON object cannot be serialized to BSON) |
-template<typename BasicJsonType, typename... Args>
-void from_json(const BasicJsonType& j, std::tuple<Args...>& t)
-{
- from_json_tuple_impl(j, t, index_sequence_for<Args...> {});
-}
+@liveexample{The following code shows how a `type_error` exception can be
+caught.,type_error}
-struct from_json_fn
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+@sa - @ref other_error for exceptions indicating other library errors
+
+@since version 3.0.0
+*/
+class type_error : public exception
{
- private:
- template<typename BasicJsonType, typename T>
- auto call(const BasicJsonType& j, T& val, priority_tag<1> /*unused*/) const
- noexcept(noexcept(from_json(j, val)))
- -> decltype(from_json(j, val), void())
+ public:
+ static type_error create(int id_, const std::string& what_arg)
{
- return from_json(j, val);
+ std::string w = exception::name("type_error", id_) + what_arg;
+ return type_error(id_, w.c_str());
}
- template<typename BasicJsonType, typename T>
- void call(const BasicJsonType& /*unused*/, T& /*unused*/, priority_tag<0> /*unused*/) const noexcept
- {
- static_assert(sizeof(BasicJsonType) == 0,
- "could not find from_json() method in T's namespace");
-#ifdef _MSC_VER
- // MSVC does not show a stacktrace for the above assert
- using decayed = uncvref_t<T>;
- static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
- "forcing MSVC stacktrace to show which T we're talking about.");
-#endif
- }
+ private:
+ JSON_HEDLEY_NON_NULL(3)
+ type_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
+};
+
+/*!
+@brief exception indicating access out of the defined range
+
+This exception is thrown in case a library function is called on an input
+parameter that exceeds the expected range, for instance in case of array
+indices or nonexisting object keys.
+
+Exceptions have ids 4xx.
+
+name / id | example message | description
+------------------------------- | --------------- | -------------------------
+json.exception.out_of_range.401 | array index 3 is out of range | The provided array index @a i is larger than @a size-1.
+json.exception.out_of_range.402 | array index '-' (3) is out of range | The special array index `-` in a JSON Pointer never describes a valid element of the array, but the index past the end. That is, it can only be used to add elements at this position, but not to read it.
+json.exception.out_of_range.403 | key 'foo' not found | The provided key was not found in the JSON object.
+json.exception.out_of_range.404 | unresolved reference token 'foo' | A reference token in a JSON Pointer could not be resolved.
+json.exception.out_of_range.405 | JSON pointer has no parent | The JSON Patch operations 'remove' and 'add' can not be applied to the root element of the JSON value.
+json.exception.out_of_range.406 | number overflow parsing '10E1000' | A parsed number could not be stored as without changing it to NaN or INF.
+json.exception.out_of_range.407 | number overflow serializing '9223372036854775808' | UBJSON and BSON only support integer numbers up to 9223372036854775807. |
+json.exception.out_of_range.408 | excessive array size: 8658170730974374167 | The size (following `#`) of an UBJSON array or object exceeds the maximal capacity. |
+json.exception.out_of_range.409 | BSON key cannot contain code point U+0000 (at byte 2) | Key identifiers to be serialized to BSON cannot contain code point U+0000, since the key is stored as zero-terminated c-string |
+
+@liveexample{The following code shows how an `out_of_range` exception can be
+caught.,out_of_range}
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref type_error for exceptions indicating executing a member function with
+ a wrong type
+@sa - @ref other_error for exceptions indicating other library errors
+@since version 3.0.0
+*/
+class out_of_range : public exception
+{
public:
- template<typename BasicJsonType, typename T>
- void operator()(const BasicJsonType& j, T& val) const
- noexcept(noexcept(std::declval<from_json_fn>().call(j, val, priority_tag<1> {})))
+ static out_of_range create(int id_, const std::string& what_arg)
{
- return call(j, val, priority_tag<1> {});
+ std::string w = exception::name("out_of_range", id_) + what_arg;
+ return out_of_range(id_, w.c_str());
}
+
+ private:
+ JSON_HEDLEY_NON_NULL(3)
+ out_of_range(int id_, const char* what_arg) : exception(id_, what_arg) {}
};
-}
-/// namespace to hold default `from_json` function
-/// to see why this is required:
-/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
-namespace
+/*!
+@brief exception indicating other library errors
+
+This exception is thrown in case of errors that cannot be classified with the
+other exception types.
+
+Exceptions have ids 5xx.
+
+name / id | example message | description
+------------------------------ | --------------- | -------------------------
+json.exception.other_error.501 | unsuccessful: {"op":"test","path":"/baz", "value":"bar"} | A JSON Patch operation 'test' failed. The unsuccessful operation is also printed.
+
+@sa - @ref exception for the base class of the library exceptions
+@sa - @ref parse_error for exceptions indicating a parse error
+@sa - @ref invalid_iterator for exceptions indicating errors with iterators
+@sa - @ref type_error for exceptions indicating executing a member function with
+ a wrong type
+@sa - @ref out_of_range for exceptions indicating access out of the defined range
+
+@liveexample{The following code shows how an `other_error` exception can be
+caught.,other_error}
+
+@since version 3.0.0
+*/
+class other_error : public exception
{
-constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value;
-}
-}
+ public:
+ static other_error create(int id_, const std::string& what_arg)
+ {
+ std::string w = exception::name("other_error", id_) + what_arg;
+ return other_error(id_, w.c_str());
+ }
-// #include <nlohmann/detail/conversions/to_json.hpp>
+ private:
+ JSON_HEDLEY_NON_NULL(3)
+ other_error(int id_, const char* what_arg) : exception(id_, what_arg) {}
+};
+} // namespace detail
+} // namespace nlohmann
+// #include <nlohmann/detail/macro_scope.hpp>
-#include <ciso646> // or, and, not
-#include <iterator> // begin, end
-#include <tuple> // tuple, get
-#include <type_traits> // is_same, is_constructible, is_floating_point, is_enum, underlying_type
-#include <utility> // move, forward, declval, pair
-#include <valarray> // valarray
-#include <vector> // vector
+// #include <nlohmann/detail/meta/cpp_future.hpp>
-// #include <nlohmann/detail/meta.hpp>
-// #include <nlohmann/detail/value_t.hpp>
+#include <cstddef> // size_t
+#include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
+
+// #include <nlohmann/detail/boolean_operators.hpp>
namespace nlohmann
{
namespace detail
{
-//////////////////
-// constructors //
-//////////////////
+// alias templates to reduce boilerplate
+template<bool B, typename T = void>
+using enable_if_t = typename std::enable_if<B, T>::type;
-template<value_t> struct external_constructor;
+template<typename T>
+using uncvref_t = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
-template<>
-struct external_constructor<value_t::boolean>
+// implementation of C++14 index_sequence and affiliates
+// source: https://stackoverflow.com/a/32223343
+template<std::size_t... Ints>
+struct index_sequence
{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::boolean_t b) noexcept
+ using type = index_sequence;
+ using value_type = std::size_t;
+ static constexpr std::size_t size() noexcept
{
- j.m_type = value_t::boolean;
- j.m_value = b;
- j.assert_invariant();
+ return sizeof...(Ints);
}
};
-template<>
-struct external_constructor<value_t::string>
-{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, const typename BasicJsonType::string_t& s)
- {
- j.m_type = value_t::string;
- j.m_value = s;
- j.assert_invariant();
- }
+template<class Sequence1, class Sequence2>
+struct merge_and_renumber;
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::string_t&& s)
- {
- j.m_type = value_t::string;
- j.m_value = std::move(s);
- j.assert_invariant();
- }
-};
+template<std::size_t... I1, std::size_t... I2>
+struct merge_and_renumber<index_sequence<I1...>, index_sequence<I2...>>
+ : index_sequence < I1..., (sizeof...(I1) + I2)... > {};
-template<>
-struct external_constructor<value_t::number_float>
-{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::number_float_t val) noexcept
- {
- j.m_type = value_t::number_float;
- j.m_value = val;
- j.assert_invariant();
- }
-};
+template<std::size_t N>
+struct make_index_sequence
+ : merge_and_renumber < typename make_index_sequence < N / 2 >::type,
+ typename make_index_sequence < N - N / 2 >::type > {};
-template<>
-struct external_constructor<value_t::number_unsigned>
-{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::number_unsigned_t val) noexcept
- {
- j.m_type = value_t::number_unsigned;
- j.m_value = val;
- j.assert_invariant();
- }
-};
+template<> struct make_index_sequence<0> : index_sequence<> {};
+template<> struct make_index_sequence<1> : index_sequence<0> {};
-template<>
-struct external_constructor<value_t::number_integer>
-{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::number_integer_t val) noexcept
- {
- j.m_type = value_t::number_integer;
- j.m_value = val;
- j.assert_invariant();
- }
-};
+template<typename... Ts>
+using index_sequence_for = make_index_sequence<sizeof...(Ts)>;
-template<>
-struct external_constructor<value_t::array>
+// dispatch utility (taken from ranges-v3)
+template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
+template<> struct priority_tag<0> {};
+
+// taken from ranges-v3
+template<typename T>
+struct static_const
{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, const typename BasicJsonType::array_t& arr)
- {
- j.m_type = value_t::array;
- j.m_value = arr;
- j.assert_invariant();
- }
+ static constexpr T value{};
+};
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
- {
- j.m_type = value_t::array;
- j.m_value = std::move(arr);
- j.assert_invariant();
- }
+template<typename T>
+constexpr T static_const<T>::value;
+} // namespace detail
+} // namespace nlohmann
- template<typename BasicJsonType, typename CompatibleArrayType,
- enable_if_t<not std::is_same<CompatibleArrayType, typename BasicJsonType::array_t>::value,
- int> = 0>
- static void construct(BasicJsonType& j, const CompatibleArrayType& arr)
- {
- using std::begin;
- using std::end;
- j.m_type = value_t::array;
- j.m_value.array = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
- j.assert_invariant();
- }
+// #include <nlohmann/detail/meta/type_traits.hpp>
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, const std::vector<bool>& arr)
- {
- j.m_type = value_t::array;
- j.m_value = value_t::array;
- j.m_value.array->reserve(arr.size());
- for (const bool x : arr)
- {
- j.m_value.array->push_back(x);
- }
- j.assert_invariant();
- }
- template<typename BasicJsonType, typename T,
- enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
- static void construct(BasicJsonType& j, const std::valarray<T>& arr)
- {
- j.m_type = value_t::array;
- j.m_value = value_t::array;
- j.m_value.array->resize(arr.size());
- std::copy(std::begin(arr), std::end(arr), j.m_value.array->begin());
- j.assert_invariant();
- }
-};
+#include <limits> // numeric_limits
+#include <type_traits> // false_type, is_constructible, is_integral, is_same, true_type
+#include <utility> // declval
-template<>
-struct external_constructor<value_t::object>
-{
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, const typename BasicJsonType::object_t& obj)
- {
- j.m_type = value_t::object;
- j.m_value = obj;
- j.assert_invariant();
- }
+// #include <nlohmann/detail/boolean_operators.hpp>
- template<typename BasicJsonType>
- static void construct(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
- {
- j.m_type = value_t::object;
- j.m_value = std::move(obj);
- j.assert_invariant();
- }
+// #include <nlohmann/detail/iterators/iterator_traits.hpp>
- template<typename BasicJsonType, typename CompatibleObjectType,
- enable_if_t<not std::is_same<CompatibleObjectType, typename BasicJsonType::object_t>::value, int> = 0>
- static void construct(BasicJsonType& j, const CompatibleObjectType& obj)
- {
- using std::begin;
- using std::end;
- j.m_type = value_t::object;
- j.m_value.object = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
- j.assert_invariant();
- }
-};
+#include <iterator> // random_access_iterator_tag
-/////////////
-// to_json //
-/////////////
+// #include <nlohmann/detail/meta/void_t.hpp>
-template<typename BasicJsonType, typename T,
- enable_if_t<std::is_same<T, typename BasicJsonType::boolean_t>::value, int> = 0>
-void to_json(BasicJsonType& j, T b) noexcept
-{
- external_constructor<value_t::boolean>::construct(j, b);
-}
-template<typename BasicJsonType, typename CompatibleString,
- enable_if_t<std::is_constructible<typename BasicJsonType::string_t, CompatibleString>::value, int> = 0>
-void to_json(BasicJsonType& j, const CompatibleString& s)
+namespace nlohmann
{
- external_constructor<value_t::string>::construct(j, s);
-}
-
-template<typename BasicJsonType>
-void to_json(BasicJsonType& j, typename BasicJsonType::string_t&& s)
+namespace detail
{
- external_constructor<value_t::string>::construct(j, std::move(s));
-}
-
-template<typename BasicJsonType, typename FloatType,
- enable_if_t<std::is_floating_point<FloatType>::value, int> = 0>
-void to_json(BasicJsonType& j, FloatType val) noexcept
+template <typename ...Ts> struct make_void
{
- external_constructor<value_t::number_float>::construct(j, static_cast<typename BasicJsonType::number_float_t>(val));
-}
+ using type = void;
+};
+template <typename ...Ts> using void_t = typename make_void<Ts...>::type;
+} // namespace detail
+} // namespace nlohmann
-template<typename BasicJsonType, typename CompatibleNumberUnsignedType,
- enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_unsigned_t, CompatibleNumberUnsignedType>::value, int> = 0>
-void to_json(BasicJsonType& j, CompatibleNumberUnsignedType val) noexcept
-{
- external_constructor<value_t::number_unsigned>::construct(j, static_cast<typename BasicJsonType::number_unsigned_t>(val));
-}
+// #include <nlohmann/detail/meta/cpp_future.hpp>
-template<typename BasicJsonType, typename CompatibleNumberIntegerType,
- enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_integer_t, CompatibleNumberIntegerType>::value, int> = 0>
-void to_json(BasicJsonType& j, CompatibleNumberIntegerType val) noexcept
-{
- external_constructor<value_t::number_integer>::construct(j, static_cast<typename BasicJsonType::number_integer_t>(val));
-}
-template<typename BasicJsonType, typename EnumType,
- enable_if_t<std::is_enum<EnumType>::value, int> = 0>
-void to_json(BasicJsonType& j, EnumType e) noexcept
+namespace nlohmann
{
- using underlying_type = typename std::underlying_type<EnumType>::type;
- external_constructor<value_t::number_integer>::construct(j, static_cast<underlying_type>(e));
-}
-
-template<typename BasicJsonType>
-void to_json(BasicJsonType& j, const std::vector<bool>& e)
+namespace detail
{
- external_constructor<value_t::array>::construct(j, e);
-}
-
-template<typename BasicJsonType, typename CompatibleArrayType,
- enable_if_t<is_compatible_array_type<BasicJsonType, CompatibleArrayType>::value or
- std::is_same<typename BasicJsonType::array_t, CompatibleArrayType>::value,
- int> = 0>
-void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
+template <typename It, typename = void>
+struct iterator_types {};
+
+template <typename It>
+struct iterator_types <
+ It,
+ void_t<typename It::difference_type, typename It::value_type, typename It::pointer,
+ typename It::reference, typename It::iterator_category >>
{
- external_constructor<value_t::array>::construct(j, arr);
-}
+ using difference_type = typename It::difference_type;
+ using value_type = typename It::value_type;
+ using pointer = typename It::pointer;
+ using reference = typename It::reference;
+ using iterator_category = typename It::iterator_category;
+};
-template<typename BasicJsonType, typename T,
- enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
-void to_json(BasicJsonType& j, std::valarray<T> arr)
+// This is required as some compilers implement std::iterator_traits in a way that
+// doesn't work with SFINAE. See https://github.com/nlohmann/json/issues/1341.
+template <typename T, typename = void>
+struct iterator_traits
{
- external_constructor<value_t::array>::construct(j, std::move(arr));
-}
+};
-template<typename BasicJsonType>
-void to_json(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
+template <typename T>
+struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
+ : iterator_types<T>
{
- external_constructor<value_t::array>::construct(j, std::move(arr));
-}
+};
-template<typename BasicJsonType, typename CompatibleObjectType,
- enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value, int> = 0>
-void to_json(BasicJsonType& j, const CompatibleObjectType& obj)
+template <typename T>
+struct iterator_traits<T*, enable_if_t<std::is_object<T>::value>>
{
- external_constructor<value_t::object>::construct(j, obj);
-}
+ using iterator_category = std::random_access_iterator_tag;
+ using value_type = T;
+ using difference_type = ptrdiff_t;
+ using pointer = T*;
+ using reference = T&;
+};
+} // namespace detail
+} // namespace nlohmann
-template<typename BasicJsonType>
-void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
-{
- external_constructor<value_t::object>::construct(j, std::move(obj));
-}
+// #include <nlohmann/detail/macro_scope.hpp>
-template<typename BasicJsonType, typename T, std::size_t N,
- enable_if_t<not std::is_constructible<typename BasicJsonType::string_t, T (&)[N]>::value, int> = 0>
-void to_json(BasicJsonType& j, T (&arr)[N])
-{
- external_constructor<value_t::array>::construct(j, arr);
-}
+// #include <nlohmann/detail/meta/cpp_future.hpp>
-template<typename BasicJsonType, typename... Args>
-void to_json(BasicJsonType& j, const std::pair<Args...>& p)
-{
- j = {p.first, p.second};
-}
+// #include <nlohmann/detail/meta/detected.hpp>
-template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
-void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...>)
-{
- j = {std::get<Idx>(t)...};
-}
-template<typename BasicJsonType, typename... Args>
-void to_json(BasicJsonType& j, const std::tuple<Args...>& t)
-{
- to_json_tuple_impl(j, t, index_sequence_for<Args...> {});
-}
+#include <type_traits>
-struct to_json_fn
-{
- private:
- template<typename BasicJsonType, typename T>
- auto call(BasicJsonType& j, T&& val, priority_tag<1> /*unused*/) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
- -> decltype(to_json(j, std::forward<T>(val)), void())
- {
- return to_json(j, std::forward<T>(val));
- }
+// #include <nlohmann/detail/meta/void_t.hpp>
- template<typename BasicJsonType, typename T>
- void call(BasicJsonType& /*unused*/, T&& /*unused*/, priority_tag<0> /*unused*/) const noexcept
- {
- static_assert(sizeof(BasicJsonType) == 0,
- "could not find to_json() method in T's namespace");
-#ifdef _MSC_VER
- // MSVC does not show a stacktrace for the above assert
- using decayed = uncvref_t<T>;
- static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
- "forcing MSVC stacktrace to show which T we're talking about.");
-#endif
- }
+// https://en.cppreference.com/w/cpp/experimental/is_detected
+namespace nlohmann
+{
+namespace detail
+{
+struct nonesuch
+{
+ nonesuch() = delete;
+ ~nonesuch() = delete;
+ nonesuch(nonesuch const&) = delete;
+ nonesuch(nonesuch const&&) = delete;
+ void operator=(nonesuch const&) = delete;
+ void operator=(nonesuch&&) = delete;
+};
- public:
- template<typename BasicJsonType, typename T>
- void operator()(BasicJsonType& j, T&& val) const
- noexcept(noexcept(std::declval<to_json_fn>().call(j, std::forward<T>(val), priority_tag<1> {})))
- {
- return call(j, std::forward<T>(val), priority_tag<1> {});
- }
+template <class Default,
+ class AlwaysVoid,
+ template <class...> class Op,
+ class... Args>
+struct detector
+{
+ using value_t = std::false_type;
+ using type = Default;
};
-}
-/// namespace to hold default `to_json` function
-namespace
+template <class Default, template <class...> class Op, class... Args>
+struct detector<Default, void_t<Op<Args...>>, Op, Args...>
{
-constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
-}
-}
+ using value_t = std::true_type;
+ using type = Op<Args...>;
+};
-// #include <nlohmann/detail/input/input_adapters.hpp>
+template <template <class...> class Op, class... Args>
+using is_detected = typename detector<nonesuch, void, Op, Args...>::value_t;
+template <template <class...> class Op, class... Args>
+using detected_t = typename detector<nonesuch, void, Op, Args...>::type;
-#include <algorithm> // min
-#include <array> // array
-#include <cassert> // assert
-#include <cstddef> // size_t
-#include <cstring> // strlen
-#include <ios> // streamsize, streamoff, streampos
-#include <istream> // istream
-#include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
-#include <memory> // shared_ptr, make_shared, addressof
-#include <numeric> // accumulate
-#include <string> // string, char_traits
-#include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
-#include <utility> // pair, declval
+template <class Default, template <class...> class Op, class... Args>
+using detected_or = detector<Default, void, Op, Args...>;
-// #include <nlohmann/detail/macro_scope.hpp>
+template <class Default, template <class...> class Op, class... Args>
+using detected_or_t = typename detected_or<Default, Op, Args...>::type;
+template <class Expected, template <class...> class Op, class... Args>
+using is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>;
-namespace nlohmann
-{
-namespace detail
-{
-////////////////////
-// input adapters //
-////////////////////
+template <class To, template <class...> class Op, class... Args>
+using is_detected_convertible =
+ std::is_convertible<detected_t<Op, Args...>, To>;
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/json_fwd.hpp>
+#ifndef INCLUDE_NLOHMANN_JSON_FWD_HPP_
+#define INCLUDE_NLOHMANN_JSON_FWD_HPP_
+
+#include <cstdint> // int64_t, uint64_t
+#include <map> // map
+#include <memory> // allocator
+#include <string> // string
+#include <vector> // vector
/*!
-@brief abstract input adapter interface
-
-Produces a stream of std::char_traits<char>::int_type characters from a
-std::istream, a buffer, or some other input type. Accepts the return of exactly
-one non-EOF character for future input. The int_type characters returned
-consist of all valid char values as positive values (typically unsigned char),
-plus an EOF value outside that range, specified by the value of the function
-std::char_traits<char>::eof(). This value is typically -1, but could be any
-arbitrary value which is not a valid char value.
+@brief namespace for Niels Lohmann
+@see https://github.com/nlohmann
+@since version 1.0.0
*/
-struct input_adapter_protocol
+namespace nlohmann
{
- /// get a character [0,255] or std::char_traits<char>::eof().
- virtual std::char_traits<char>::int_type get_character() = 0;
- /// restore the last non-eof() character to input
- virtual void unget_character() = 0;
- virtual ~input_adapter_protocol() = default;
-};
+/*!
+@brief default JSONSerializer template argument
-/// a type to simplify interfaces
-using input_adapter_t = std::shared_ptr<input_adapter_protocol>;
+This serializer ignores the template arguments and uses ADL
+([argument-dependent lookup](https://en.cppreference.com/w/cpp/language/adl))
+for serialization.
+*/
+template<typename T = void, typename SFINAE = void>
+struct adl_serializer;
+
+template<template<typename U, typename V, typename... Args> class ObjectType =
+ std::map,
+ template<typename U, typename... Args> class ArrayType = std::vector,
+ class StringType = std::string, class BooleanType = bool,
+ class NumberIntegerType = std::int64_t,
+ class NumberUnsignedType = std::uint64_t,
+ class NumberFloatType = double,
+ template<typename U> class AllocatorType = std::allocator,
+ template<typename T, typename SFINAE = void> class JSONSerializer =
+ adl_serializer,
+ class BinaryType = std::vector<std::uint8_t>>
+class basic_json;
/*!
-Input adapter for a (caching) istream. Ignores a UFT Byte Order Mark at
-beginning of input. Does not support changing the underlying std::streambuf
-in mid-input. Maintains underlying std::istream and std::streambuf to support
-subsequent use of standard std::istream operations to process any input
-characters following those used in parsing the JSON input. Clears the
-std::istream flags; any input errors (e.g., EOF) will be detected by the first
-subsequent call for input from the std::istream.
+@brief JSON Pointer
+
+A JSON pointer defines a string syntax for identifying a specific value
+within a JSON document. It can be used with functions `at` and
+`operator[]`. Furthermore, JSON pointers are the base for JSON patches.
+
+@sa [RFC 6901](https://tools.ietf.org/html/rfc6901)
+
+@since version 2.0.0
*/
-class input_stream_adapter : public input_adapter_protocol
-{
- public:
- ~input_stream_adapter() override
- {
- // clear stream flags; we use underlying streambuf I/O, do not
- // maintain ifstream flags
- is.clear();
- }
+template<typename BasicJsonType>
+class json_pointer;
- explicit input_stream_adapter(std::istream& i)
- : is(i), sb(*i.rdbuf())
- {
- // skip byte order mark
- std::char_traits<char>::int_type c;
- if ((c = get_character()) == 0xEF)
- {
- if ((c = get_character()) == 0xBB)
- {
- if ((c = get_character()) == 0xBF)
- {
- return; // Ignore BOM
- }
- else if (c != std::char_traits<char>::eof())
- {
- is.unget();
- }
- is.putback('\xBB');
- }
- else if (c != std::char_traits<char>::eof())
- {
- is.unget();
- }
- is.putback('\xEF');
- }
- else if (c != std::char_traits<char>::eof())
- {
- is.unget(); // no byte order mark; process as usual
- }
- }
+/*!
+@brief default JSON class
- // delete because of pointer members
- input_stream_adapter(const input_stream_adapter&) = delete;
- input_stream_adapter& operator=(input_stream_adapter&) = delete;
+This type is the default specialization of the @ref basic_json class which
+uses the standard template types.
- // std::istream/std::streambuf use std::char_traits<char>::to_int_type, to
- // ensure that std::char_traits<char>::eof() and the character 0xFF do not
- // end up as the same value, eg. 0xFFFFFFFF.
- std::char_traits<char>::int_type get_character() override
- {
- return sb.sbumpc();
- }
+@since version 1.0.0
+*/
+using json = basic_json<>;
+} // namespace nlohmann
- void unget_character() override
- {
- sb.sungetc(); // is.unget() avoided for performance
- }
+#endif // INCLUDE_NLOHMANN_JSON_FWD_HPP_
- private:
- /// the associated input stream
- std::istream& is;
- std::streambuf& sb;
-};
-/// input adapter for buffer input
-class input_buffer_adapter : public input_adapter_protocol
+namespace nlohmann
{
- public:
- input_buffer_adapter(const char* b, const std::size_t l)
- : cursor(b), limit(b + l), start(b)
- {
- // skip byte order mark
- if (l >= 3 and b[0] == '\xEF' and b[1] == '\xBB' and b[2] == '\xBF')
- {
- cursor += 3;
- }
- }
+/*!
+@brief detail namespace with internal helper functions
- // delete because of pointer members
- input_buffer_adapter(const input_buffer_adapter&) = delete;
- input_buffer_adapter& operator=(input_buffer_adapter&) = delete;
+This namespace collects functions that should not be exposed,
+implementations of some @ref basic_json methods, and meta-programming helpers.
- std::char_traits<char>::int_type get_character() noexcept override
- {
- if (JSON_LIKELY(cursor < limit))
- {
- return std::char_traits<char>::to_int_type(*(cursor++));
- }
+@since version 2.1.0
+*/
+namespace detail
+{
+/////////////
+// helpers //
+/////////////
- return std::char_traits<char>::eof();
- }
+// Note to maintainers:
+//
+// Every trait in this file expects a non CV-qualified type.
+// The only exceptions are in the 'aliases for detected' section
+// (i.e. those of the form: decltype(T::member_function(std::declval<T>())))
+//
+// In this case, T has to be properly CV-qualified to constraint the function arguments
+// (e.g. to_json(BasicJsonType&, const T&))
- void unget_character() noexcept override
- {
- if (JSON_LIKELY(cursor > start))
- {
- --cursor;
- }
- }
+template<typename> struct is_basic_json : std::false_type {};
- private:
- /// pointer to the current character
- const char* cursor;
- /// pointer past the last character
- const char* limit;
- /// pointer to the first character
- const char* start;
-};
+NLOHMANN_BASIC_JSON_TPL_DECLARATION
+struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
-class input_adapter
-{
- public:
- // native support
+//////////////////////
+// json_ref helpers //
+//////////////////////
- /// input adapter for input stream
- input_adapter(std::istream& i)
- : ia(std::make_shared<input_stream_adapter>(i)) {}
+template <typename>
+class json_ref;
- /// input adapter for input stream
- input_adapter(std::istream&& i)
- : ia(std::make_shared<input_stream_adapter>(i)) {}
+template<typename>
+struct is_json_ref : std::false_type {};
- /// input adapter for buffer
- template<typename CharT,
- typename std::enable_if<
- std::is_pointer<CharT>::value and
- std::is_integral<typename std::remove_pointer<CharT>::type>::value and
- sizeof(typename std::remove_pointer<CharT>::type) == 1,
- int>::type = 0>
- input_adapter(CharT b, std::size_t l)
- : ia(std::make_shared<input_buffer_adapter>(reinterpret_cast<const char*>(b), l)) {}
+template <typename T>
+struct is_json_ref<json_ref<T>> : std::true_type {};
- // derived support
+//////////////////////////
+// aliases for detected //
+//////////////////////////
- /// input adapter for string literal
- template<typename CharT,
- typename std::enable_if<
- std::is_pointer<CharT>::value and
- std::is_integral<typename std::remove_pointer<CharT>::type>::value and
- sizeof(typename std::remove_pointer<CharT>::type) == 1,
- int>::type = 0>
- input_adapter(CharT b)
- : input_adapter(reinterpret_cast<const char*>(b),
- std::strlen(reinterpret_cast<const char*>(b))) {}
+template <typename T>
+using mapped_type_t = typename T::mapped_type;
- /// input adapter for iterator range with contiguous storage
- template<class IteratorType,
- typename std::enable_if<
- std::is_same<typename std::iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value,
- int>::type = 0>
- input_adapter(IteratorType first, IteratorType last)
- {
- // assertion to check that the iterator range is indeed contiguous,
- // see http://stackoverflow.com/a/35008842/266378 for more discussion
- assert(std::accumulate(
- first, last, std::pair<bool, int>(true, 0),
- [&first](std::pair<bool, int> res, decltype(*first) val)
- {
- res.first &= (val == *(std::next(std::addressof(*first), res.second++)));
- return res;
- }).first);
+template <typename T>
+using key_type_t = typename T::key_type;
- // assertion to check that each element is 1 byte long
- static_assert(
- sizeof(typename std::iterator_traits<IteratorType>::value_type) == 1,
- "each element in the iterator range must have the size of 1 byte");
+template <typename T>
+using value_type_t = typename T::value_type;
- const auto len = static_cast<size_t>(std::distance(first, last));
- if (JSON_LIKELY(len > 0))
- {
- // there is at least one element: use the address of first
- ia = std::make_shared<input_buffer_adapter>(reinterpret_cast<const char*>(&(*first)), len);
- }
- else
- {
- // the address of first cannot be used: use nullptr
- ia = std::make_shared<input_buffer_adapter>(nullptr, len);
- }
- }
+template <typename T>
+using difference_type_t = typename T::difference_type;
- /// input adapter for array
- template<class T, std::size_t N>
- input_adapter(T (&array)[N])
- : input_adapter(std::begin(array), std::end(array)) {}
+template <typename T>
+using pointer_t = typename T::pointer;
- /// input adapter for contiguous container
- template<class ContiguousContainer, typename
- std::enable_if<not std::is_pointer<ContiguousContainer>::value and
- std::is_base_of<std::random_access_iterator_tag, typename std::iterator_traits<decltype(std::begin(std::declval<ContiguousContainer const>()))>::iterator_category>::value,
- int>::type = 0>
- input_adapter(const ContiguousContainer& c)
- : input_adapter(std::begin(c), std::end(c)) {}
+template <typename T>
+using reference_t = typename T::reference;
- operator input_adapter_t()
- {
- return ia;
- }
+template <typename T>
+using iterator_category_t = typename T::iterator_category;
- private:
- /// the actual adapter
- input_adapter_t ia = nullptr;
-};
-}
-}
+template <typename T>
+using iterator_t = typename T::iterator;
-// #include <nlohmann/detail/input/lexer.hpp>
+template <typename T, typename... Args>
+using to_json_function = decltype(T::to_json(std::declval<Args>()...));
+template <typename T, typename... Args>
+using from_json_function = decltype(T::from_json(std::declval<Args>()...));
-#include <clocale> // localeconv
-#include <cstddef> // size_t
-#include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
-#include <initializer_list> // initializer_list
-#include <ios> // hex, uppercase
-#include <iomanip> // setw, setfill
-#include <sstream> // stringstream
-#include <string> // char_traits, string
-#include <vector> // vector
+template <typename T, typename U>
+using get_template_function = decltype(std::declval<T>().template get<U>());
-// #include <nlohmann/detail/macro_scope.hpp>
+// trait checking if JSONSerializer<T>::from_json(json const&, udt&) exists
+template <typename BasicJsonType, typename T, typename = void>
+struct has_from_json : std::false_type {};
-// #include <nlohmann/detail/input/input_adapters.hpp>
+template <typename BasicJsonType, typename T>
+struct has_from_json<BasicJsonType, T,
+ enable_if_t<not is_basic_json<T>::value>>
+{
+ using serializer = typename BasicJsonType::template json_serializer<T, void>;
+ static constexpr bool value =
+ is_detected_exact<void, from_json_function, serializer,
+ const BasicJsonType&, T&>::value;
+};
-namespace nlohmann
+// This trait checks if JSONSerializer<T>::from_json(json const&) exists
+// this overload is used for non-default-constructible user-defined-types
+template <typename BasicJsonType, typename T, typename = void>
+struct has_non_default_from_json : std::false_type {};
+
+template<typename BasicJsonType, typename T>
+struct has_non_default_from_json<BasicJsonType, T, enable_if_t<not is_basic_json<T>::value>>
{
-namespace detail
+ using serializer = typename BasicJsonType::template json_serializer<T, void>;
+
+ static constexpr bool value =
+ is_detected_exact<T, from_json_function, serializer,
+ const BasicJsonType&>::value;
+};
+
+// This trait checks if BasicJsonType::json_serializer<T>::to_json exists
+// Do not evaluate the trait when T is a basic_json type, to avoid template instantiation infinite recursion.
+template <typename BasicJsonType, typename T, typename = void>
+struct has_to_json : std::false_type {};
+
+template <typename BasicJsonType, typename T>
+struct has_to_json<BasicJsonType, T, enable_if_t<not is_basic_json<T>::value>>
{
-///////////
-// lexer //
-///////////
+ using serializer = typename BasicJsonType::template json_serializer<T, void>;
-/*!
-@brief lexical analysis
+ static constexpr bool value =
+ is_detected_exact<void, to_json_function, serializer, BasicJsonType&,
+ T>::value;
+};
-This class organizes the lexical analysis during JSON deserialization.
-*/
-template<typename BasicJsonType>
-class lexer
+
+///////////////////
+// is_ functions //
+///////////////////
+
+template <typename T, typename = void>
+struct is_iterator_traits : std::false_type {};
+
+template <typename T>
+struct is_iterator_traits<iterator_traits<T>>
{
- using number_integer_t = typename BasicJsonType::number_integer_t;
- using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
- using number_float_t = typename BasicJsonType::number_float_t;
- using string_t = typename BasicJsonType::string_t;
+ private:
+ using traits = iterator_traits<T>;
public:
- /// token types for the parser
- enum class token_type
- {
- uninitialized, ///< indicating the scanner is uninitialized
- literal_true, ///< the `true` literal
- literal_false, ///< the `false` literal
- literal_null, ///< the `null` literal
- value_string, ///< a string -- use get_string() for actual value
- value_unsigned, ///< an unsigned integer -- use get_number_unsigned() for actual value
- value_integer, ///< a signed integer -- use get_number_integer() for actual value
- value_float, ///< an floating point number -- use get_number_float() for actual value
- begin_array, ///< the character for array begin `[`
- begin_object, ///< the character for object begin `{`
- end_array, ///< the character for array end `]`
- end_object, ///< the character for object end `}`
- name_separator, ///< the name separator `:`
- value_separator, ///< the value separator `,`
- parse_error, ///< indicating a parse error
- end_of_input, ///< indicating the end of the input buffer
- literal_or_value ///< a literal or the begin of a value (only for diagnostics)
- };
+ static constexpr auto value =
+ is_detected<value_type_t, traits>::value &&
+ is_detected<difference_type_t, traits>::value &&
+ is_detected<pointer_t, traits>::value &&
+ is_detected<iterator_category_t, traits>::value &&
+ is_detected<reference_t, traits>::value;
+};
- /// return name of values of type token_type (only used for errors)
- static const char* token_type_name(const token_type t) noexcept
- {
- switch (t)
- {
- case token_type::uninitialized:
- return "<uninitialized>";
- case token_type::literal_true:
- return "true literal";
- case token_type::literal_false:
- return "false literal";
- case token_type::literal_null:
- return "null literal";
- case token_type::value_string:
- return "string literal";
- case lexer::token_type::value_unsigned:
- case lexer::token_type::value_integer:
- case lexer::token_type::value_float:
- return "number literal";
- case token_type::begin_array:
- return "'['";
- case token_type::begin_object:
- return "'{'";
- case token_type::end_array:
- return "']'";
- case token_type::end_object:
- return "'}'";
- case token_type::name_separator:
- return "':'";
- case token_type::value_separator:
- return "','";
- case token_type::parse_error:
- return "<parse error>";
- case token_type::end_of_input:
- return "end of input";
- case token_type::literal_or_value:
- return "'[', '{', or a literal";
- default: // catch non-enum values
- return "unknown token"; // LCOV_EXCL_LINE
- }
- }
-
- explicit lexer(detail::input_adapter_t adapter)
- : ia(std::move(adapter)), decimal_point_char(get_decimal_point()) {}
+// source: https://stackoverflow.com/a/37193089/4116453
- // delete because of pointer members
- lexer(const lexer&) = delete;
- lexer& operator=(lexer&) = delete;
+template <typename T, typename = void>
+struct is_complete_type : std::false_type {};
- private:
- /////////////////////
- // locales
- /////////////////////
+template <typename T>
+struct is_complete_type<T, decltype(void(sizeof(T)))> : std::true_type {};
- /// return the locale-dependent decimal point
- static char get_decimal_point() noexcept
- {
- const auto loc = localeconv();
- assert(loc != nullptr);
- return (loc->decimal_point == nullptr) ? '.' : *(loc->decimal_point);
- }
+template <typename BasicJsonType, typename CompatibleObjectType,
+ typename = void>
+struct is_compatible_object_type_impl : std::false_type {};
- /////////////////////
- // scan functions
- /////////////////////
+template <typename BasicJsonType, typename CompatibleObjectType>
+struct is_compatible_object_type_impl <
+ BasicJsonType, CompatibleObjectType,
+ enable_if_t<is_detected<mapped_type_t, CompatibleObjectType>::value and
+ is_detected<key_type_t, CompatibleObjectType>::value >>
+{
- /*!
- @brief get codepoint from 4 hex characters following `\u`
+ using object_t = typename BasicJsonType::object_t;
- For input "\u c1 c2 c3 c4" the codepoint is:
- (c1 * 0x1000) + (c2 * 0x0100) + (c3 * 0x0010) + c4
- = (c1 << 12) + (c2 << 8) + (c3 << 4) + (c4 << 0)
+ // macOS's is_constructible does not play well with nonesuch...
+ static constexpr bool value =
+ std::is_constructible<typename object_t::key_type,
+ typename CompatibleObjectType::key_type>::value and
+ std::is_constructible<typename object_t::mapped_type,
+ typename CompatibleObjectType::mapped_type>::value;
+};
- Furthermore, the possible characters '0'..'9', 'A'..'F', and 'a'..'f'
- must be converted to the integers 0x0..0x9, 0xA..0xF, 0xA..0xF, resp. The
- conversion is done by subtracting the offset (0x30, 0x37, and 0x57)
- between the ASCII value of the character and the desired integer value.
+template <typename BasicJsonType, typename CompatibleObjectType>
+struct is_compatible_object_type
+ : is_compatible_object_type_impl<BasicJsonType, CompatibleObjectType> {};
- @return codepoint (0x0000..0xFFFF) or -1 in case of an error (e.g. EOF or
- non-hex character)
- */
- int get_codepoint()
- {
- // this function only makes sense after reading `\u`
- assert(current == 'u');
- int codepoint = 0;
+template <typename BasicJsonType, typename ConstructibleObjectType,
+ typename = void>
+struct is_constructible_object_type_impl : std::false_type {};
- const auto factors = { 12, 8, 4, 0 };
- for (const auto factor : factors)
- {
- get();
+template <typename BasicJsonType, typename ConstructibleObjectType>
+struct is_constructible_object_type_impl <
+ BasicJsonType, ConstructibleObjectType,
+ enable_if_t<is_detected<mapped_type_t, ConstructibleObjectType>::value and
+ is_detected<key_type_t, ConstructibleObjectType>::value >>
+{
+ using object_t = typename BasicJsonType::object_t;
- if (current >= '0' and current <= '9')
- {
- codepoint += ((current - 0x30) << factor);
- }
- else if (current >= 'A' and current <= 'F')
- {
- codepoint += ((current - 0x37) << factor);
- }
- else if (current >= 'a' and current <= 'f')
- {
- codepoint += ((current - 0x57) << factor);
- }
- else
- {
- return -1;
- }
- }
+ static constexpr bool value =
+ (std::is_default_constructible<ConstructibleObjectType>::value and
+ (std::is_move_assignable<ConstructibleObjectType>::value or
+ std::is_copy_assignable<ConstructibleObjectType>::value) and
+ (std::is_constructible<typename ConstructibleObjectType::key_type,
+ typename object_t::key_type>::value and
+ std::is_same <
+ typename object_t::mapped_type,
+ typename ConstructibleObjectType::mapped_type >::value)) or
+ (has_from_json<BasicJsonType,
+ typename ConstructibleObjectType::mapped_type>::value or
+ has_non_default_from_json <
+ BasicJsonType,
+ typename ConstructibleObjectType::mapped_type >::value);
+};
- assert(0x0000 <= codepoint and codepoint <= 0xFFFF);
- return codepoint;
- }
+template <typename BasicJsonType, typename ConstructibleObjectType>
+struct is_constructible_object_type
+ : is_constructible_object_type_impl<BasicJsonType,
+ ConstructibleObjectType> {};
- /*!
- @brief check if the next byte(s) are inside a given range
+template <typename BasicJsonType, typename CompatibleStringType,
+ typename = void>
+struct is_compatible_string_type_impl : std::false_type {};
- Adds the current byte and, for each passed range, reads a new byte and
- checks if it is inside the range. If a violation was detected, set up an
- error message and return false. Otherwise, return true.
+template <typename BasicJsonType, typename CompatibleStringType>
+struct is_compatible_string_type_impl <
+ BasicJsonType, CompatibleStringType,
+ enable_if_t<is_detected_exact<typename BasicJsonType::string_t::value_type,
+ value_type_t, CompatibleStringType>::value >>
+{
+ static constexpr auto value =
+ std::is_constructible<typename BasicJsonType::string_t, CompatibleStringType>::value;
+};
- @param[in] ranges list of integers; interpreted as list of pairs of
- inclusive lower and upper bound, respectively
+template <typename BasicJsonType, typename ConstructibleStringType>
+struct is_compatible_string_type
+ : is_compatible_string_type_impl<BasicJsonType, ConstructibleStringType> {};
- @pre The passed list @a ranges must have 2, 4, or 6 elements; that is,
- 1, 2, or 3 pairs. This precondition is enforced by an assertion.
+template <typename BasicJsonType, typename ConstructibleStringType,
+ typename = void>
+struct is_constructible_string_type_impl : std::false_type {};
- @return true if and only if no range violation was detected
- */
- bool next_byte_in_range(std::initializer_list<int> ranges)
- {
- assert(ranges.size() == 2 or ranges.size() == 4 or ranges.size() == 6);
- add(current);
+template <typename BasicJsonType, typename ConstructibleStringType>
+struct is_constructible_string_type_impl <
+ BasicJsonType, ConstructibleStringType,
+ enable_if_t<is_detected_exact<typename BasicJsonType::string_t::value_type,
+ value_type_t, ConstructibleStringType>::value >>
+{
+ static constexpr auto value =
+ std::is_constructible<ConstructibleStringType,
+ typename BasicJsonType::string_t>::value;
+};
- for (auto range = ranges.begin(); range != ranges.end(); ++range)
- {
- get();
- if (JSON_LIKELY(*range <= current and current <= *(++range)))
- {
- add(current);
- }
- else
- {
- error_message = "invalid string: ill-formed UTF-8 byte";
- return false;
- }
- }
+template <typename BasicJsonType, typename ConstructibleStringType>
+struct is_constructible_string_type
+ : is_constructible_string_type_impl<BasicJsonType, ConstructibleStringType> {};
+
+template <typename BasicJsonType, typename CompatibleArrayType, typename = void>
+struct is_compatible_array_type_impl : std::false_type {};
+
+template <typename BasicJsonType, typename CompatibleArrayType>
+struct is_compatible_array_type_impl <
+ BasicJsonType, CompatibleArrayType,
+ enable_if_t<is_detected<value_type_t, CompatibleArrayType>::value and
+ is_detected<iterator_t, CompatibleArrayType>::value and
+// This is needed because json_reverse_iterator has a ::iterator type...
+// Therefore it is detected as a CompatibleArrayType.
+// The real fix would be to have an Iterable concept.
+ not is_iterator_traits<
+ iterator_traits<CompatibleArrayType>>::value >>
+{
+ static constexpr bool value =
+ std::is_constructible<BasicJsonType,
+ typename CompatibleArrayType::value_type>::value;
+};
- return true;
- }
+template <typename BasicJsonType, typename CompatibleArrayType>
+struct is_compatible_array_type
+ : is_compatible_array_type_impl<BasicJsonType, CompatibleArrayType> {};
+
+template <typename BasicJsonType, typename ConstructibleArrayType, typename = void>
+struct is_constructible_array_type_impl : std::false_type {};
+
+template <typename BasicJsonType, typename ConstructibleArrayType>
+struct is_constructible_array_type_impl <
+ BasicJsonType, ConstructibleArrayType,
+ enable_if_t<std::is_same<ConstructibleArrayType,
+ typename BasicJsonType::value_type>::value >>
+ : std::true_type {};
+
+template <typename BasicJsonType, typename ConstructibleArrayType>
+struct is_constructible_array_type_impl <
+ BasicJsonType, ConstructibleArrayType,
+ enable_if_t<not std::is_same<ConstructibleArrayType,
+ typename BasicJsonType::value_type>::value and
+ std::is_default_constructible<ConstructibleArrayType>::value and
+(std::is_move_assignable<ConstructibleArrayType>::value or
+ std::is_copy_assignable<ConstructibleArrayType>::value) and
+is_detected<value_type_t, ConstructibleArrayType>::value and
+is_detected<iterator_t, ConstructibleArrayType>::value and
+is_complete_type<
+detected_t<value_type_t, ConstructibleArrayType>>::value >>
+{
+ static constexpr bool value =
+ // This is needed because json_reverse_iterator has a ::iterator type,
+ // furthermore, std::back_insert_iterator (and other iterators) have a
+ // base class `iterator`... Therefore it is detected as a
+ // ConstructibleArrayType. The real fix would be to have an Iterable
+ // concept.
+ not is_iterator_traits<iterator_traits<ConstructibleArrayType>>::value and
+
+ (std::is_same<typename ConstructibleArrayType::value_type,
+ typename BasicJsonType::array_t::value_type>::value or
+ has_from_json<BasicJsonType,
+ typename ConstructibleArrayType::value_type>::value or
+ has_non_default_from_json <
+ BasicJsonType, typename ConstructibleArrayType::value_type >::value);
+};
- /*!
- @brief scan a string literal
+template <typename BasicJsonType, typename ConstructibleArrayType>
+struct is_constructible_array_type
+ : is_constructible_array_type_impl<BasicJsonType, ConstructibleArrayType> {};
- This function scans a string according to Sect. 7 of RFC 7159. While
- scanning, bytes are escaped and copied into buffer token_buffer. Then the
- function returns successfully, token_buffer is *not* null-terminated (as it
- may contain \0 bytes), and token_buffer.size() is the number of bytes in the
- string.
+template <typename RealIntegerType, typename CompatibleNumberIntegerType,
+ typename = void>
+struct is_compatible_integer_type_impl : std::false_type {};
- @return token_type::value_string if string could be successfully scanned,
- token_type::parse_error otherwise
+template <typename RealIntegerType, typename CompatibleNumberIntegerType>
+struct is_compatible_integer_type_impl <
+ RealIntegerType, CompatibleNumberIntegerType,
+ enable_if_t<std::is_integral<RealIntegerType>::value and
+ std::is_integral<CompatibleNumberIntegerType>::value and
+ not std::is_same<bool, CompatibleNumberIntegerType>::value >>
+{
+ // is there an assert somewhere on overflows?
+ using RealLimits = std::numeric_limits<RealIntegerType>;
+ using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
- @note In case of errors, variable error_message contains a textual
- description.
- */
- token_type scan_string()
- {
- // reset token_buffer (ignore opening quote)
- reset();
+ static constexpr auto value =
+ std::is_constructible<RealIntegerType,
+ CompatibleNumberIntegerType>::value and
+ CompatibleLimits::is_integer and
+ RealLimits::is_signed == CompatibleLimits::is_signed;
+};
- // we entered the function by reading an open quote
- assert(current == '\"');
+template <typename RealIntegerType, typename CompatibleNumberIntegerType>
+struct is_compatible_integer_type
+ : is_compatible_integer_type_impl<RealIntegerType,
+ CompatibleNumberIntegerType> {};
- while (true)
- {
- // get next character
- switch (get())
- {
- // end of file while parsing string
- case std::char_traits<char>::eof():
- {
- error_message = "invalid string: missing closing quote";
- return token_type::parse_error;
- }
+template <typename BasicJsonType, typename CompatibleType, typename = void>
+struct is_compatible_type_impl: std::false_type {};
- // closing quote
- case '\"':
- {
- return token_type::value_string;
- }
+template <typename BasicJsonType, typename CompatibleType>
+struct is_compatible_type_impl <
+ BasicJsonType, CompatibleType,
+ enable_if_t<is_complete_type<CompatibleType>::value >>
+{
+ static constexpr bool value =
+ has_to_json<BasicJsonType, CompatibleType>::value;
+};
- // escapes
- case '\\':
- {
- switch (get())
- {
- // quotation mark
- case '\"':
- add('\"');
- break;
- // reverse solidus
- case '\\':
- add('\\');
- break;
- // solidus
- case '/':
- add('/');
- break;
- // backspace
- case 'b':
- add('\b');
- break;
- // form feed
- case 'f':
- add('\f');
- break;
- // line feed
- case 'n':
- add('\n');
- break;
- // carriage return
- case 'r':
- add('\r');
- break;
- // tab
- case 't':
- add('\t');
- break;
+template <typename BasicJsonType, typename CompatibleType>
+struct is_compatible_type
+ : is_compatible_type_impl<BasicJsonType, CompatibleType> {};
- // unicode escapes
- case 'u':
- {
- const int codepoint1 = get_codepoint();
- int codepoint = codepoint1; // start with codepoint1
+// https://en.cppreference.com/w/cpp/types/conjunction
+template<class...> struct conjunction : std::true_type { };
+template<class B1> struct conjunction<B1> : B1 { };
+template<class B1, class... Bn>
+struct conjunction<B1, Bn...>
+: std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
- if (JSON_UNLIKELY(codepoint1 == -1))
- {
- error_message = "invalid string: '\\u' must be followed by 4 hex digits";
- return token_type::parse_error;
- }
+template <typename T1, typename T2>
+struct is_constructible_tuple : std::false_type {};
- // check if code point is a high surrogate
- if (0xD800 <= codepoint1 and codepoint1 <= 0xDBFF)
- {
- // expect next \uxxxx entry
- if (JSON_LIKELY(get() == '\\' and get() == 'u'))
- {
- const int codepoint2 = get_codepoint();
+template <typename T1, typename... Args>
+struct is_constructible_tuple<T1, std::tuple<Args...>> : conjunction<std::is_constructible<T1, Args>...> {};
+} // namespace detail
+} // namespace nlohmann
- if (JSON_UNLIKELY(codepoint2 == -1))
- {
- error_message = "invalid string: '\\u' must be followed by 4 hex digits";
- return token_type::parse_error;
- }
+// #include <nlohmann/detail/value_t.hpp>
- // check if codepoint2 is a low surrogate
- if (JSON_LIKELY(0xDC00 <= codepoint2 and codepoint2 <= 0xDFFF))
- {
- // overwrite codepoint
- codepoint =
- // high surrogate occupies the most significant 22 bits
- (codepoint1 << 10)
- // low surrogate occupies the least significant 15 bits
- + codepoint2
- // there is still the 0xD800, 0xDC00 and 0x10000 noise
- // in the result so we have to subtract with:
- // (0xD800 << 10) + DC00 - 0x10000 = 0x35FDC00
- - 0x35FDC00;
- }
- else
- {
- error_message = "invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF";
- return token_type::parse_error;
- }
- }
- else
- {
- error_message = "invalid string: surrogate U+DC00..U+DFFF must be followed by U+DC00..U+DFFF";
- return token_type::parse_error;
- }
- }
- else
- {
- if (JSON_UNLIKELY(0xDC00 <= codepoint1 and codepoint1 <= 0xDFFF))
- {
- error_message = "invalid string: surrogate U+DC00..U+DFFF must follow U+D800..U+DBFF";
- return token_type::parse_error;
- }
- }
+
+#include <array> // array
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t
+#include <string> // string
+
+// #include <nlohmann/detail/boolean_operators.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+///////////////////////////
+// JSON type enumeration //
+///////////////////////////
+
+/*!
+@brief the JSON type enumeration
+
+This enumeration collects the different JSON types. It is internally used to
+distinguish the stored values, and the functions @ref basic_json::is_null(),
+@ref basic_json::is_object(), @ref basic_json::is_array(),
+@ref basic_json::is_string(), @ref basic_json::is_boolean(),
+@ref basic_json::is_number() (with @ref basic_json::is_number_integer(),
+@ref basic_json::is_number_unsigned(), and @ref basic_json::is_number_float()),
+@ref basic_json::is_discarded(), @ref basic_json::is_primitive(), and
+@ref basic_json::is_structured() rely on it.
+
+@note There are three enumeration entries (number_integer, number_unsigned, and
+number_float), because the library distinguishes these three types for numbers:
+@ref basic_json::number_unsigned_t is used for unsigned integers,
+@ref basic_json::number_integer_t is used for signed integers, and
+@ref basic_json::number_float_t is used for floating-point numbers or to
+approximate integers which do not fit in the limits of their respective type.
+
+@sa @ref basic_json::basic_json(const value_t value_type) -- create a JSON
+value with the default value for a given type
+
+@since version 1.0.0
+*/
+enum class value_t : std::uint8_t
+{
+ null, ///< null value
+ object, ///< object (unordered set of name/value pairs)
+ array, ///< array (ordered collection of values)
+ string, ///< string value
+ boolean, ///< boolean value
+ number_integer, ///< number value (signed integer)
+ number_unsigned, ///< number value (unsigned integer)
+ number_float, ///< number value (floating-point)
+ binary, ///< binary array (ordered collection of bytes)
+ discarded ///< discarded by the parser callback function
+};
+
+/*!
+@brief comparison operator for JSON types
+
+Returns an ordering that is similar to Python:
+- order: null < boolean < number < object < array < string < binary
+- furthermore, each type is not smaller than itself
+- discarded values are not comparable
+- binary is represented as a b"" string in python and directly comparable to a
+ string; however, making a binary array directly comparable with a string would
+ be surprising behavior in a JSON file.
+
+@since version 1.0.0
+*/
+inline bool operator<(const value_t lhs, const value_t rhs) noexcept
+{
+ static constexpr std::array<std::uint8_t, 9> order = {{
+ 0 /* null */, 3 /* object */, 4 /* array */, 5 /* string */,
+ 1 /* boolean */, 2 /* integer */, 2 /* unsigned */, 2 /* float */,
+ 6 /* binary */
+ }
+ };
+
+ const auto l_index = static_cast<std::size_t>(lhs);
+ const auto r_index = static_cast<std::size_t>(rhs);
+ return l_index < order.size() and r_index < order.size() and order[l_index] < order[r_index];
+}
+} // namespace detail
+} // namespace nlohmann
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_null()))
+ {
+ JSON_THROW(type_error::create(302, "type must be null, but is " + std::string(j.type_name())));
+ }
+ n = nullptr;
+}
+
+// overloads for basic_json template parameters
+template<typename BasicJsonType, typename ArithmeticType,
+ enable_if_t<std::is_arithmetic<ArithmeticType>::value and
+ not std::is_same<ArithmeticType, typename BasicJsonType::boolean_t>::value,
+ int> = 0>
+void get_arithmetic_value(const BasicJsonType& j, ArithmeticType& val)
+{
+ switch (static_cast<value_t>(j))
+ {
+ case value_t::number_unsigned:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_unsigned_t*>());
+ break;
+ }
+ case value_t::number_integer:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_integer_t*>());
+ break;
+ }
+ case value_t::number_float:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_float_t*>());
+ break;
+ }
+
+ default:
+ JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name())));
+ }
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::boolean_t& b)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_boolean()))
+ {
+ JSON_THROW(type_error::create(302, "type must be boolean, but is " + std::string(j.type_name())));
+ }
+ b = *j.template get_ptr<const typename BasicJsonType::boolean_t*>();
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::string_t& s)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_string()))
+ {
+ JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name())));
+ }
+ s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+
+template <
+ typename BasicJsonType, typename ConstructibleStringType,
+ enable_if_t <
+ is_constructible_string_type<BasicJsonType, ConstructibleStringType>::value and
+ not std::is_same<typename BasicJsonType::string_t,
+ ConstructibleStringType>::value,
+ int > = 0 >
+void from_json(const BasicJsonType& j, ConstructibleStringType& s)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_string()))
+ {
+ JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name())));
+ }
+
+ s = *j.template get_ptr<const typename BasicJsonType::string_t*>();
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::number_float_t& val)
+{
+ get_arithmetic_value(j, val);
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::number_unsigned_t& val)
+{
+ get_arithmetic_value(j, val);
+}
+
+template<typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::number_integer_t& val)
+{
+ get_arithmetic_value(j, val);
+}
+
+template<typename BasicJsonType, typename EnumType,
+ enable_if_t<std::is_enum<EnumType>::value, int> = 0>
+void from_json(const BasicJsonType& j, EnumType& e)
+{
+ typename std::underlying_type<EnumType>::type val;
+ get_arithmetic_value(j, val);
+ e = static_cast<EnumType>(val);
+}
+
+// forward_list doesn't have an insert method
+template<typename BasicJsonType, typename T, typename Allocator,
+ enable_if_t<std::is_convertible<BasicJsonType, T>::value, int> = 0>
+void from_json(const BasicJsonType& j, std::forward_list<T, Allocator>& l)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+ }
+ l.clear();
+ std::transform(j.rbegin(), j.rend(),
+ std::front_inserter(l), [](const BasicJsonType & i)
+ {
+ return i.template get<T>();
+ });
+}
+
+// valarray doesn't have an insert method
+template<typename BasicJsonType, typename T,
+ enable_if_t<std::is_convertible<BasicJsonType, T>::value, int> = 0>
+void from_json(const BasicJsonType& j, std::valarray<T>& l)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+ }
+ l.resize(j.size());
+ std::copy(j.begin(), j.end(), std::begin(l));
+}
+
+template <typename BasicJsonType, typename T, std::size_t N>
+auto from_json(const BasicJsonType& j, T (&arr)[N])
+-> decltype(j.template get<T>(), void())
+{
+ for (std::size_t i = 0; i < N; ++i)
+ {
+ arr[i] = j.at(i).template get<T>();
+ }
+}
+
+template<typename BasicJsonType>
+void from_json_array_impl(const BasicJsonType& j, typename BasicJsonType::array_t& arr, priority_tag<3> /*unused*/)
+{
+ arr = *j.template get_ptr<const typename BasicJsonType::array_t*>();
+}
+
+template <typename BasicJsonType, typename T, std::size_t N>
+auto from_json_array_impl(const BasicJsonType& j, std::array<T, N>& arr,
+ priority_tag<2> /*unused*/)
+-> decltype(j.template get<T>(), void())
+{
+ for (std::size_t i = 0; i < N; ++i)
+ {
+ arr[i] = j.at(i).template get<T>();
+ }
+}
+
+template<typename BasicJsonType, typename ConstructibleArrayType>
+auto from_json_array_impl(const BasicJsonType& j, ConstructibleArrayType& arr, priority_tag<1> /*unused*/)
+-> decltype(
+ arr.reserve(std::declval<typename ConstructibleArrayType::size_type>()),
+ j.template get<typename ConstructibleArrayType::value_type>(),
+ void())
+{
+ using std::end;
+
+ ConstructibleArrayType ret;
+ ret.reserve(j.size());
+ std::transform(j.begin(), j.end(),
+ std::inserter(ret, end(ret)), [](const BasicJsonType & i)
+ {
+ // get<BasicJsonType>() returns *this, this won't call a from_json
+ // method when value_type is BasicJsonType
+ return i.template get<typename ConstructibleArrayType::value_type>();
+ });
+ arr = std::move(ret);
+}
+
+template <typename BasicJsonType, typename ConstructibleArrayType>
+void from_json_array_impl(const BasicJsonType& j, ConstructibleArrayType& arr,
+ priority_tag<0> /*unused*/)
+{
+ using std::end;
+
+ ConstructibleArrayType ret;
+ std::transform(
+ j.begin(), j.end(), std::inserter(ret, end(ret)),
+ [](const BasicJsonType & i)
+ {
+ // get<BasicJsonType>() returns *this, this won't call a from_json
+ // method when value_type is BasicJsonType
+ return i.template get<typename ConstructibleArrayType::value_type>();
+ });
+ arr = std::move(ret);
+}
+
+template <typename BasicJsonType, typename ConstructibleArrayType,
+ enable_if_t <
+ is_constructible_array_type<BasicJsonType, ConstructibleArrayType>::value and
+ not is_constructible_object_type<BasicJsonType, ConstructibleArrayType>::value and
+ not is_constructible_string_type<BasicJsonType, ConstructibleArrayType>::value and
+ not std::is_same<ConstructibleArrayType, typename BasicJsonType::binary_t>::value and
+ not is_basic_json<ConstructibleArrayType>::value,
+ int > = 0 >
+auto from_json(const BasicJsonType& j, ConstructibleArrayType& arr)
+-> decltype(from_json_array_impl(j, arr, priority_tag<3> {}),
+j.template get<typename ConstructibleArrayType::value_type>(),
+void())
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " +
+ std::string(j.type_name())));
+ }
+
+ from_json_array_impl(j, arr, priority_tag<3> {});
+}
+
+template <typename BasicJsonType>
+void from_json(const BasicJsonType& j, typename BasicJsonType::binary_t& bin)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_binary()))
+ {
+ JSON_THROW(type_error::create(302, "type must be binary, but is " + std::string(j.type_name())));
+ }
+
+ bin = *j.template get_ptr<const typename BasicJsonType::binary_t*>();
+}
+
+template<typename BasicJsonType, typename ConstructibleObjectType,
+ enable_if_t<is_constructible_object_type<BasicJsonType, ConstructibleObjectType>::value, int> = 0>
+void from_json(const BasicJsonType& j, ConstructibleObjectType& obj)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_object()))
+ {
+ JSON_THROW(type_error::create(302, "type must be object, but is " + std::string(j.type_name())));
+ }
+
+ ConstructibleObjectType ret;
+ auto inner_object = j.template get_ptr<const typename BasicJsonType::object_t*>();
+ using value_type = typename ConstructibleObjectType::value_type;
+ std::transform(
+ inner_object->begin(), inner_object->end(),
+ std::inserter(ret, ret.begin()),
+ [](typename BasicJsonType::object_t::value_type const & p)
+ {
+ return value_type(p.first, p.second.template get<typename ConstructibleObjectType::mapped_type>());
+ });
+ obj = std::move(ret);
+}
+
+// overload for arithmetic types, not chosen for basic_json template arguments
+// (BooleanType, etc..); note: Is it really necessary to provide explicit
+// overloads for boolean_t etc. in case of a custom BooleanType which is not
+// an arithmetic type?
+template<typename BasicJsonType, typename ArithmeticType,
+ enable_if_t <
+ std::is_arithmetic<ArithmeticType>::value and
+ not std::is_same<ArithmeticType, typename BasicJsonType::number_unsigned_t>::value and
+ not std::is_same<ArithmeticType, typename BasicJsonType::number_integer_t>::value and
+ not std::is_same<ArithmeticType, typename BasicJsonType::number_float_t>::value and
+ not std::is_same<ArithmeticType, typename BasicJsonType::boolean_t>::value,
+ int> = 0>
+void from_json(const BasicJsonType& j, ArithmeticType& val)
+{
+ switch (static_cast<value_t>(j))
+ {
+ case value_t::number_unsigned:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_unsigned_t*>());
+ break;
+ }
+ case value_t::number_integer:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_integer_t*>());
+ break;
+ }
+ case value_t::number_float:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::number_float_t*>());
+ break;
+ }
+ case value_t::boolean:
+ {
+ val = static_cast<ArithmeticType>(*j.template get_ptr<const typename BasicJsonType::boolean_t*>());
+ break;
+ }
+
+ default:
+ JSON_THROW(type_error::create(302, "type must be number, but is " + std::string(j.type_name())));
+ }
+}
+
+template<typename BasicJsonType, typename A1, typename A2>
+void from_json(const BasicJsonType& j, std::pair<A1, A2>& p)
+{
+ p = {j.at(0).template get<A1>(), j.at(1).template get<A2>()};
+}
+
+template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
+void from_json_tuple_impl(const BasicJsonType& j, Tuple& t, index_sequence<Idx...> /*unused*/)
+{
+ t = std::make_tuple(j.at(Idx).template get<typename std::tuple_element<Idx, Tuple>::type>()...);
+}
+
+template<typename BasicJsonType, typename... Args>
+void from_json(const BasicJsonType& j, std::tuple<Args...>& t)
+{
+ from_json_tuple_impl(j, t, index_sequence_for<Args...> {});
+}
+
+template <typename BasicJsonType, typename Key, typename Value, typename Compare, typename Allocator,
+ typename = enable_if_t<not std::is_constructible<
+ typename BasicJsonType::string_t, Key>::value>>
+void from_json(const BasicJsonType& j, std::map<Key, Value, Compare, Allocator>& m)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+ }
+ m.clear();
+ for (const auto& p : j)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not p.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name())));
+ }
+ m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+ }
+}
+
+template <typename BasicJsonType, typename Key, typename Value, typename Hash, typename KeyEqual, typename Allocator,
+ typename = enable_if_t<not std::is_constructible<
+ typename BasicJsonType::string_t, Key>::value>>
+void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyEqual, Allocator>& m)
+{
+ if (JSON_HEDLEY_UNLIKELY(not j.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(j.type_name())));
+ }
+ m.clear();
+ for (const auto& p : j)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not p.is_array()))
+ {
+ JSON_THROW(type_error::create(302, "type must be array, but is " + std::string(p.type_name())));
+ }
+ m.emplace(p.at(0).template get<Key>(), p.at(1).template get<Value>());
+ }
+}
+
+struct from_json_fn
+{
+ template<typename BasicJsonType, typename T>
+ auto operator()(const BasicJsonType& j, T& val) const
+ noexcept(noexcept(from_json(j, val)))
+ -> decltype(from_json(j, val), void())
+ {
+ return from_json(j, val);
+ }
+};
+} // namespace detail
+
+/// namespace to hold default `from_json` function
+/// to see why this is required:
+/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
+namespace
+{
+constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::value;
+} // namespace
+} // namespace nlohmann
+
+// #include <nlohmann/detail/conversions/to_json.hpp>
+
+
+#include <algorithm> // copy
+#include <iterator> // begin, end
+#include <string> // string
+#include <tuple> // tuple, get
+#include <type_traits> // is_same, is_constructible, is_floating_point, is_enum, underlying_type
+#include <utility> // move, forward, declval, pair
+#include <valarray> // valarray
+#include <vector> // vector
+
+// #include <nlohmann/detail/boolean_operators.hpp>
+
+// #include <nlohmann/detail/iterators/iteration_proxy.hpp>
+
+
+#include <cstddef> // size_t
+#include <iterator> // input_iterator_tag
+#include <string> // string, to_string
+#include <tuple> // tuple_size, get, tuple_element
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template<typename string_type>
+void int_to_string( string_type& target, std::size_t value )
+{
+ target = std::to_string(value);
+}
+template <typename IteratorType> class iteration_proxy_value
+{
+ public:
+ using difference_type = std::ptrdiff_t;
+ using value_type = iteration_proxy_value;
+ using pointer = value_type * ;
+ using reference = value_type & ;
+ using iterator_category = std::input_iterator_tag;
+ using string_type = typename std::remove_cv< typename std::remove_reference<decltype( std::declval<IteratorType>().key() ) >::type >::type;
+
+ private:
+ /// the iterator
+ IteratorType anchor;
+ /// an index for arrays (used to create key names)
+ std::size_t array_index = 0;
+ /// last stringified array index
+ mutable std::size_t array_index_last = 0;
+ /// a string representation of the array index
+ mutable string_type array_index_str = "0";
+ /// an empty string (to return a reference for primitive values)
+ const string_type empty_str = "";
+
+ public:
+ explicit iteration_proxy_value(IteratorType it) noexcept : anchor(it) {}
+
+ /// dereference operator (needed for range-based for)
+ iteration_proxy_value& operator*()
+ {
+ return *this;
+ }
+
+ /// increment operator (needed for range-based for)
+ iteration_proxy_value& operator++()
+ {
+ ++anchor;
+ ++array_index;
+
+ return *this;
+ }
+
+ /// equality operator (needed for InputIterator)
+ bool operator==(const iteration_proxy_value& o) const
+ {
+ return anchor == o.anchor;
+ }
+
+ /// inequality operator (needed for range-based for)
+ bool operator!=(const iteration_proxy_value& o) const
+ {
+ return anchor != o.anchor;
+ }
+
+ /// return key of the iterator
+ const string_type& key() const
+ {
+ assert(anchor.m_object != nullptr);
+
+ switch (anchor.m_object->type())
+ {
+ // use integer array index as key
+ case value_t::array:
+ {
+ if (array_index != array_index_last)
+ {
+ int_to_string( array_index_str, array_index );
+ array_index_last = array_index;
+ }
+ return array_index_str;
+ }
+
+ // use key from the object
+ case value_t::object:
+ return anchor.key();
+
+ // use an empty key for all primitive types
+ default:
+ return empty_str;
+ }
+ }
+
+ /// return value of the iterator
+ typename IteratorType::reference value() const
+ {
+ return anchor.value();
+ }
+};
+
+/// proxy class for the items() function
+template<typename IteratorType> class iteration_proxy
+{
+ private:
+ /// the container to iterate
+ typename IteratorType::reference container;
+
+ public:
+ /// construct iteration proxy from a container
+ explicit iteration_proxy(typename IteratorType::reference cont) noexcept
+ : container(cont) {}
+
+ /// return iterator begin (needed for range-based for)
+ iteration_proxy_value<IteratorType> begin() noexcept
+ {
+ return iteration_proxy_value<IteratorType>(container.begin());
+ }
+
+ /// return iterator end (needed for range-based for)
+ iteration_proxy_value<IteratorType> end() noexcept
+ {
+ return iteration_proxy_value<IteratorType>(container.end());
+ }
+};
+// Structured Bindings Support
+// For further reference see https://blog.tartanllama.xyz/structured-bindings/
+// And see https://github.com/nlohmann/json/pull/1391
+template <std::size_t N, typename IteratorType, enable_if_t<N == 0, int> = 0>
+auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.key())
+{
+ return i.key();
+}
+// Structured Bindings Support
+// For further reference see https://blog.tartanllama.xyz/structured-bindings/
+// And see https://github.com/nlohmann/json/pull/1391
+template <std::size_t N, typename IteratorType, enable_if_t<N == 1, int> = 0>
+auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.value())
+{
+ return i.value();
+}
+} // namespace detail
+} // namespace nlohmann
+
+// The Addition to the STD Namespace is required to add
+// Structured Bindings Support to the iteration_proxy_value class
+// For further reference see https://blog.tartanllama.xyz/structured-bindings/
+// And see https://github.com/nlohmann/json/pull/1391
+namespace std
+{
+#if defined(__clang__)
+ // Fix: https://github.com/nlohmann/json/issues/1401
+ #pragma clang diagnostic push
+ #pragma clang diagnostic ignored "-Wmismatched-tags"
+#endif
+template <typename IteratorType>
+class tuple_size<::nlohmann::detail::iteration_proxy_value<IteratorType>>
+ : public std::integral_constant<std::size_t, 2> {};
+
+template <std::size_t N, typename IteratorType>
+class tuple_element<N, ::nlohmann::detail::iteration_proxy_value<IteratorType >>
+{
+ public:
+ using type = decltype(
+ get<N>(std::declval <
+ ::nlohmann::detail::iteration_proxy_value<IteratorType >> ()));
+};
+#if defined(__clang__)
+ #pragma clang diagnostic pop
+#endif
+} // namespace std
+
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+//////////////////
+// constructors //
+//////////////////
+
+template<value_t> struct external_constructor;
+
+template<>
+struct external_constructor<value_t::boolean>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::boolean_t b) noexcept
+ {
+ j.m_type = value_t::boolean;
+ j.m_value = b;
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::string>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, const typename BasicJsonType::string_t& s)
+ {
+ j.m_type = value_t::string;
+ j.m_value = s;
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::string_t&& s)
+ {
+ j.m_type = value_t::string;
+ j.m_value = std::move(s);
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType, typename CompatibleStringType,
+ enable_if_t<not std::is_same<CompatibleStringType, typename BasicJsonType::string_t>::value,
+ int> = 0>
+ static void construct(BasicJsonType& j, const CompatibleStringType& str)
+ {
+ j.m_type = value_t::string;
+ j.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::binary>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, const typename BasicJsonType::binary_t& b)
+ {
+ j.m_type = value_t::binary;
+ typename BasicJsonType::binary_t value{b};
+ j.m_value = value;
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::binary_t&& b)
+ {
+ j.m_type = value_t::binary;
+ typename BasicJsonType::binary_t value{std::move(b)};
+ j.m_value = value;
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::number_float>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::number_float_t val) noexcept
+ {
+ j.m_type = value_t::number_float;
+ j.m_value = val;
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::number_unsigned>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::number_unsigned_t val) noexcept
+ {
+ j.m_type = value_t::number_unsigned;
+ j.m_value = val;
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::number_integer>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::number_integer_t val) noexcept
+ {
+ j.m_type = value_t::number_integer;
+ j.m_value = val;
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::array>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, const typename BasicJsonType::array_t& arr)
+ {
+ j.m_type = value_t::array;
+ j.m_value = arr;
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
+ {
+ j.m_type = value_t::array;
+ j.m_value = std::move(arr);
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType, typename CompatibleArrayType,
+ enable_if_t<not std::is_same<CompatibleArrayType, typename BasicJsonType::array_t>::value,
+ int> = 0>
+ static void construct(BasicJsonType& j, const CompatibleArrayType& arr)
+ {
+ using std::begin;
+ using std::end;
+ j.m_type = value_t::array;
+ j.m_value.array = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, const std::vector<bool>& arr)
+ {
+ j.m_type = value_t::array;
+ j.m_value = value_t::array;
+ j.m_value.array->reserve(arr.size());
+ for (const bool x : arr)
+ {
+ j.m_value.array->push_back(x);
+ }
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType, typename T,
+ enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
+ static void construct(BasicJsonType& j, const std::valarray<T>& arr)
+ {
+ j.m_type = value_t::array;
+ j.m_value = value_t::array;
+ j.m_value.array->resize(arr.size());
+ if (arr.size() > 0)
+ {
+ std::copy(std::begin(arr), std::end(arr), j.m_value.array->begin());
+ }
+ j.assert_invariant();
+ }
+};
+
+template<>
+struct external_constructor<value_t::object>
+{
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, const typename BasicJsonType::object_t& obj)
+ {
+ j.m_type = value_t::object;
+ j.m_value = obj;
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType>
+ static void construct(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
+ {
+ j.m_type = value_t::object;
+ j.m_value = std::move(obj);
+ j.assert_invariant();
+ }
+
+ template<typename BasicJsonType, typename CompatibleObjectType,
+ enable_if_t<not std::is_same<CompatibleObjectType, typename BasicJsonType::object_t>::value, int> = 0>
+ static void construct(BasicJsonType& j, const CompatibleObjectType& obj)
+ {
+ using std::begin;
+ using std::end;
+
+ j.m_type = value_t::object;
+ j.m_value.object = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
+ j.assert_invariant();
+ }
+};
+
+/////////////
+// to_json //
+/////////////
+
+template<typename BasicJsonType, typename T,
+ enable_if_t<std::is_same<T, typename BasicJsonType::boolean_t>::value, int> = 0>
+void to_json(BasicJsonType& j, T b) noexcept
+{
+ external_constructor<value_t::boolean>::construct(j, b);
+}
+
+template<typename BasicJsonType, typename CompatibleString,
+ enable_if_t<std::is_constructible<typename BasicJsonType::string_t, CompatibleString>::value, int> = 0>
+void to_json(BasicJsonType& j, const CompatibleString& s)
+{
+ external_constructor<value_t::string>::construct(j, s);
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, typename BasicJsonType::string_t&& s)
+{
+ external_constructor<value_t::string>::construct(j, std::move(s));
+}
+
+template<typename BasicJsonType, typename FloatType,
+ enable_if_t<std::is_floating_point<FloatType>::value, int> = 0>
+void to_json(BasicJsonType& j, FloatType val) noexcept
+{
+ external_constructor<value_t::number_float>::construct(j, static_cast<typename BasicJsonType::number_float_t>(val));
+}
+
+template<typename BasicJsonType, typename CompatibleNumberUnsignedType,
+ enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_unsigned_t, CompatibleNumberUnsignedType>::value, int> = 0>
+void to_json(BasicJsonType& j, CompatibleNumberUnsignedType val) noexcept
+{
+ external_constructor<value_t::number_unsigned>::construct(j, static_cast<typename BasicJsonType::number_unsigned_t>(val));
+}
+
+template<typename BasicJsonType, typename CompatibleNumberIntegerType,
+ enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_integer_t, CompatibleNumberIntegerType>::value, int> = 0>
+void to_json(BasicJsonType& j, CompatibleNumberIntegerType val) noexcept
+{
+ external_constructor<value_t::number_integer>::construct(j, static_cast<typename BasicJsonType::number_integer_t>(val));
+}
+
+template<typename BasicJsonType, typename EnumType,
+ enable_if_t<std::is_enum<EnumType>::value, int> = 0>
+void to_json(BasicJsonType& j, EnumType e) noexcept
+{
+ using underlying_type = typename std::underlying_type<EnumType>::type;
+ external_constructor<value_t::number_integer>::construct(j, static_cast<underlying_type>(e));
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, const std::vector<bool>& e)
+{
+ external_constructor<value_t::array>::construct(j, e);
+}
+
+template <typename BasicJsonType, typename CompatibleArrayType,
+ enable_if_t<is_compatible_array_type<BasicJsonType,
+ CompatibleArrayType>::value and
+ not is_compatible_object_type<BasicJsonType, CompatibleArrayType>::value and
+ not is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value and
+ not std::is_same<typename BasicJsonType::binary_t, CompatibleArrayType>::value and
+ not is_basic_json<CompatibleArrayType>::value,
+ int> = 0>
+void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
+{
+ external_constructor<value_t::array>::construct(j, arr);
+}
+
+template <typename BasicJsonType>
+void to_json(BasicJsonType& j, const typename BasicJsonType::binary_t& bin)
+{
+ external_constructor<value_t::binary>::construct(j, bin);
+}
+
+template<typename BasicJsonType, typename T,
+ enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
+void to_json(BasicJsonType& j, const std::valarray<T>& arr)
+{
+ external_constructor<value_t::array>::construct(j, std::move(arr));
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
+{
+ external_constructor<value_t::array>::construct(j, std::move(arr));
+}
+
+template<typename BasicJsonType, typename CompatibleObjectType,
+ enable_if_t<is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value and not is_basic_json<CompatibleObjectType>::value, int> = 0>
+void to_json(BasicJsonType& j, const CompatibleObjectType& obj)
+{
+ external_constructor<value_t::object>::construct(j, obj);
+}
+
+template<typename BasicJsonType>
+void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
+{
+ external_constructor<value_t::object>::construct(j, std::move(obj));
+}
+
+template <
+ typename BasicJsonType, typename T, std::size_t N,
+ enable_if_t<not std::is_constructible<typename BasicJsonType::string_t,
+ const T(&)[N]>::value,
+ int> = 0 >
+void to_json(BasicJsonType& j, const T(&arr)[N])
+{
+ external_constructor<value_t::array>::construct(j, arr);
+}
+
+template < typename BasicJsonType, typename T1, typename T2, enable_if_t < std::is_constructible<BasicJsonType, T1>::value&& std::is_constructible<BasicJsonType, T2>::value, int > = 0 >
+void to_json(BasicJsonType& j, const std::pair<T1, T2>& p)
+{
+ j = { p.first, p.second };
+}
+
+// for https://github.com/nlohmann/json/pull/1134
+template < typename BasicJsonType, typename T,
+ enable_if_t<std::is_same<T, iteration_proxy_value<typename BasicJsonType::iterator>>::value, int> = 0>
+void to_json(BasicJsonType& j, const T& b)
+{
+ j = { {b.key(), b.value()} };
+}
+
+template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
+void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...> /*unused*/)
+{
+ j = { std::get<Idx>(t)... };
+}
+
+template<typename BasicJsonType, typename T, enable_if_t<is_constructible_tuple<BasicJsonType, T>::value, int > = 0>
+void to_json(BasicJsonType& j, const T& t)
+{
+ to_json_tuple_impl(j, t, make_index_sequence<std::tuple_size<T>::value> {});
+}
+
+struct to_json_fn
+{
+ template<typename BasicJsonType, typename T>
+ auto operator()(BasicJsonType& j, T&& val) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
+ -> decltype(to_json(j, std::forward<T>(val)), void())
+ {
+ return to_json(j, std::forward<T>(val));
+ }
+};
+} // namespace detail
+
+/// namespace to hold default `to_json` function
+namespace
+{
+constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
+} // namespace
+} // namespace nlohmann
+
+
+namespace nlohmann
+{
+
+template<typename, typename>
+struct adl_serializer
+{
+ /*!
+ @brief convert a JSON value to any value type
+
+ This function is usually called by the `get()` function of the
+ @ref basic_json class (either explicit or via conversion operators).
+
+ @param[in] j JSON value to read from
+ @param[in,out] val value to write to
+ */
+ template<typename BasicJsonType, typename ValueType>
+ static auto from_json(BasicJsonType&& j, ValueType& val) noexcept(
+ noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
+ -> decltype(::nlohmann::from_json(std::forward<BasicJsonType>(j), val), void())
+ {
+ ::nlohmann::from_json(std::forward<BasicJsonType>(j), val);
+ }
+
+ /*!
+ @brief convert any value type to a JSON value
+
+ This function is usually called by the constructors of the @ref basic_json
+ class.
+
+ @param[in,out] j JSON value to write to
+ @param[in] val value to read from
+ */
+ template <typename BasicJsonType, typename ValueType>
+ static auto to_json(BasicJsonType& j, ValueType&& val) noexcept(
+ noexcept(::nlohmann::to_json(j, std::forward<ValueType>(val))))
+ -> decltype(::nlohmann::to_json(j, std::forward<ValueType>(val)), void())
+ {
+ ::nlohmann::to_json(j, std::forward<ValueType>(val));
+ }
+};
+
+} // namespace nlohmann
+
+// #include <nlohmann/byte_container_with_subtype.hpp>
+
+
+#include <cstdint> // uint8_t
+#include <tuple> // tie
+#include <utility> // move
+
+namespace nlohmann
+{
+
+/*!
+@brief an internal type for a backed binary type
+
+This type extends the template parameter @a BinaryType provided to `basic_json`
+with a subtype used by BSON and MessagePack. This type exists so that the user
+does not have to specify a type themselves with a specific naming scheme in
+order to override the binary type.
+
+@tparam BinaryType container to store bytes (`std::vector<std::uint8_t>` by
+ default)
+
+@since version 3.8.0
+*/
+template<typename BinaryType>
+class byte_container_with_subtype : public BinaryType
+{
+ public:
+ /// the type of the underlying container
+ using container_type = BinaryType;
+
+ byte_container_with_subtype() noexcept(noexcept(container_type()))
+ : container_type()
+ {}
+
+ byte_container_with_subtype(const container_type& b) noexcept(noexcept(container_type(b)))
+ : container_type(b)
+ {}
+
+ byte_container_with_subtype(container_type&& b) noexcept(noexcept(container_type(std::move(b))))
+ : container_type(std::move(b))
+ {}
+
+ byte_container_with_subtype(const container_type& b, std::uint8_t subtype) noexcept(noexcept(container_type(b)))
+ : container_type(b)
+ , m_subtype(subtype)
+ , m_has_subtype(true)
+ {}
+
+ byte_container_with_subtype(container_type&& b, std::uint8_t subtype) noexcept(noexcept(container_type(std::move(b))))
+ : container_type(std::move(b))
+ , m_subtype(subtype)
+ , m_has_subtype(true)
+ {}
+
+ bool operator==(const byte_container_with_subtype& rhs) const
+ {
+ return std::tie(static_cast<const BinaryType&>(*this), m_subtype, m_has_subtype) ==
+ std::tie(static_cast<const BinaryType&>(rhs), rhs.m_subtype, rhs.m_has_subtype);
+ }
+
+ bool operator!=(const byte_container_with_subtype& rhs) const
+ {
+ return !(rhs == *this);
+ }
+
+ /*!
+ @brief sets the binary subtype
+
+ Sets the binary subtype of the value, also flags a binary JSON value as
+ having a subtype, which has implications for serialization.
+
+ @complexity Constant.
+
+ @exceptionsafety No-throw guarantee: this member function never throws
+ exceptions.
+
+ @sa @ref subtype() -- return the binary subtype
+ @sa @ref clear_subtype() -- clears the binary subtype
+ @sa @ref has_subtype() -- returns whether or not the binary value has a
+ subtype
+
+ @since version 3.8.0
+ */
+ void set_subtype(std::uint8_t subtype) noexcept
+ {
+ m_subtype = subtype;
+ m_has_subtype = true;
+ }
+
+ /*!
+ @brief return the binary subtype
+
+ Returns the numerical subtype of the value if it has a subtype. If it does
+ not have a subtype, this function will return size_t(-1) as a sentinel
+ value.
+
+ @return the numerical subtype of the binary value
+
+ @complexity Constant.
+
+ @exceptionsafety No-throw guarantee: this member function never throws
+ exceptions.
+
+ @sa @ref set_subtype() -- sets the binary subtype
+ @sa @ref clear_subtype() -- clears the binary subtype
+ @sa @ref has_subtype() -- returns whether or not the binary value has a
+ subtype
+
+ @since version 3.8.0
+ */
+ constexpr std::uint8_t subtype() const noexcept
+ {
+ return m_subtype;
+ }
+
+ /*!
+ @brief return whether the value has a subtype
+
+ @return whether the value has a subtype
+
+ @complexity Constant.
+
+ @exceptionsafety No-throw guarantee: this member function never throws
+ exceptions.
+
+ @sa @ref subtype() -- return the binary subtype
+ @sa @ref set_subtype() -- sets the binary subtype
+ @sa @ref clear_subtype() -- clears the binary subtype
+
+ @since version 3.8.0
+ */
+ constexpr bool has_subtype() const noexcept
+ {
+ return m_has_subtype;
+ }
+
+ /*!
+ @brief clears the binary subtype
+
+ Clears the binary subtype and flags the value as not having a subtype, which
+ has implications for serialization; for instance MessagePack will prefer the
+ bin family over the ext family.
+
+ @complexity Constant.
+
+ @exceptionsafety No-throw guarantee: this member function never throws
+ exceptions.
+
+ @sa @ref subtype() -- return the binary subtype
+ @sa @ref set_subtype() -- sets the binary subtype
+ @sa @ref has_subtype() -- returns whether or not the binary value has a
+ subtype
+
+ @since version 3.8.0
+ */
+ void clear_subtype() noexcept
+ {
+ m_subtype = 0;
+ m_has_subtype = false;
+ }
+
+ private:
+ std::uint8_t m_subtype = 0;
+ bool m_has_subtype = false;
+};
+
+} // namespace nlohmann
+
+// #include <nlohmann/detail/boolean_operators.hpp>
+
+// #include <nlohmann/detail/conversions/from_json.hpp>
+
+// #include <nlohmann/detail/conversions/to_json.hpp>
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/input/binary_reader.hpp>
+
+
+#include <algorithm> // generate_n
+#include <array> // array
+#include <cassert> // assert
+#include <cmath> // ldexp
+#include <cstddef> // size_t
+#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
+#include <cstdio> // snprintf
+#include <cstring> // memcpy
+#include <iterator> // back_inserter
+#include <limits> // numeric_limits
+#include <string> // char_traits, string
+#include <utility> // make_pair, move
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+
+#include <array> // array
+#include <cassert> // assert
+#include <cstddef> // size_t
+#include <cstdio> //FILE *
+#include <cstring> // strlen
+#include <istream> // istream
+#include <iterator> // begin, end, iterator_traits, random_access_iterator_tag, distance, next
+#include <memory> // shared_ptr, make_shared, addressof
+#include <numeric> // accumulate
+#include <string> // string, char_traits
+#include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
+#include <utility> // pair, declval
+
+// #include <nlohmann/detail/iterators/iterator_traits.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+/// the supported input formats
+enum class input_format_t { json, cbor, msgpack, ubjson, bson };
+
+////////////////////
+// input adapters //
+////////////////////
+
+/*!
+Input adapter for stdio file access. This adapter read only 1 byte and do not use any
+ buffer. This adapter is a very low level adapter.
+*/
+class file_input_adapter
+{
+ public:
+ using char_type = char;
+
+ JSON_HEDLEY_NON_NULL(2)
+ explicit file_input_adapter(std::FILE* f) noexcept
+ : m_file(f)
+ {}
+
+ // make class move-only
+ file_input_adapter(const file_input_adapter&) = delete;
+ file_input_adapter(file_input_adapter&&) = default;
+ file_input_adapter& operator=(const file_input_adapter&) = delete;
+ file_input_adapter& operator=(file_input_adapter&&) = delete;
+
+ std::char_traits<char>::int_type get_character() noexcept
+ {
+ return std::fgetc(m_file);
+ }
+
+ private:
+ /// the file pointer to read from
+ std::FILE* m_file;
+};
+
+
+/*!
+Input adapter for a (caching) istream. Ignores a UFT Byte Order Mark at
+beginning of input. Does not support changing the underlying std::streambuf
+in mid-input. Maintains underlying std::istream and std::streambuf to support
+subsequent use of standard std::istream operations to process any input
+characters following those used in parsing the JSON input. Clears the
+std::istream flags; any input errors (e.g., EOF) will be detected by the first
+subsequent call for input from the std::istream.
+*/
+class input_stream_adapter
+{
+ public:
+ using char_type = char;
+
+ ~input_stream_adapter()
+ {
+ // clear stream flags; we use underlying streambuf I/O, do not
+ // maintain ifstream flags, except eof
+ if (is)
+ {
+ is->clear(is->rdstate() & std::ios::eofbit);
+ }
+ }
+
+ explicit input_stream_adapter(std::istream& i)
+ : is(&i), sb(i.rdbuf())
+ {}
+
+ // delete because of pointer members
+ input_stream_adapter(const input_stream_adapter&) = delete;
+ input_stream_adapter& operator=(input_stream_adapter&) = delete;
+ input_stream_adapter& operator=(input_stream_adapter&& rhs) = delete;
+
+ input_stream_adapter(input_stream_adapter&& rhs) : is(rhs.is), sb(rhs.sb)
+ {
+ rhs.is = nullptr;
+ rhs.sb = nullptr;
+ }
+
+ // std::istream/std::streambuf use std::char_traits<char>::to_int_type, to
+ // ensure that std::char_traits<char>::eof() and the character 0xFF do not
+ // end up as the same value, eg. 0xFFFFFFFF.
+ std::char_traits<char>::int_type get_character()
+ {
+ auto res = sb->sbumpc();
+ // set eof manually, as we don't use the istream interface.
+ if (JSON_HEDLEY_UNLIKELY(res == EOF))
+ {
+ is->clear(is->rdstate() | std::ios::eofbit);
+ }
+ return res;
+ }
+
+ private:
+ /// the associated input stream
+ std::istream* is = nullptr;
+ std::streambuf* sb = nullptr;
+};
+
+// General-purpose iterator-based adapter. It might not be as fast as
+// theoretically possible for some containers, but it is extremely versatile.
+template<typename IteratorType>
+class iterator_input_adapter
+{
+ public:
+ using char_type = typename std::iterator_traits<IteratorType>::value_type;
+
+ iterator_input_adapter(IteratorType first, IteratorType last)
+ : current(std::move(first)), end(std::move(last)) {}
+
+ typename std::char_traits<char_type>::int_type get_character()
+ {
+ if (JSON_HEDLEY_LIKELY(current != end))
+ {
+ auto result = std::char_traits<char_type>::to_int_type(*current);
+ std::advance(current, 1);
+ return result;
+ }
+ else
+ {
+ return std::char_traits<char_type>::eof();
+ }
+ }
+
+ private:
+ IteratorType current;
+ IteratorType end;
+
+ template<typename BaseInputAdapter, size_t T>
+ friend struct wide_string_input_helper;
+
+ bool empty() const
+ {
+ return current == end;
+ }
+
+};
+
+
+template<typename BaseInputAdapter, size_t T>
+struct wide_string_input_helper;
+
+template<typename BaseInputAdapter>
+struct wide_string_input_helper<BaseInputAdapter, 4>
+{
+ // UTF-32
+ static void fill_buffer(BaseInputAdapter& input,
+ std::array<std::char_traits<char>::int_type, 4>& utf8_bytes,
+ size_t& utf8_bytes_index,
+ size_t& utf8_bytes_filled)
+ {
+ utf8_bytes_index = 0;
+
+ if (JSON_HEDLEY_UNLIKELY(input.empty()))
+ {
+ utf8_bytes[0] = std::char_traits<char>::eof();
+ utf8_bytes_filled = 1;
+ }
+ else
+ {
+ // get the current character
+ const auto wc = input.get_character();
+
+ // UTF-32 to UTF-8 encoding
+ if (wc < 0x80)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+ utf8_bytes_filled = 1;
+ }
+ else if (wc <= 0x7FF)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xC0u | ((static_cast<unsigned int>(wc) >> 6u) & 0x1Fu));
+ utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+ utf8_bytes_filled = 2;
+ }
+ else if (wc <= 0xFFFF)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xE0u | ((static_cast<unsigned int>(wc) >> 12u) & 0x0Fu));
+ utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 6u) & 0x3Fu));
+ utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+ utf8_bytes_filled = 3;
+ }
+ else if (wc <= 0x10FFFF)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xF0u | ((static_cast<unsigned int>(wc) >> 18u) & 0x07u));
+ utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 12u) & 0x3Fu));
+ utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 6u) & 0x3Fu));
+ utf8_bytes[3] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+ utf8_bytes_filled = 4;
+ }
+ else
+ {
+ // unknown character
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+ utf8_bytes_filled = 1;
+ }
+ }
+ }
+};
+
+template<typename BaseInputAdapter>
+struct wide_string_input_helper<BaseInputAdapter, 2>
+{
+ // UTF-16
+ static void fill_buffer(BaseInputAdapter& input,
+ std::array<std::char_traits<char>::int_type, 4>& utf8_bytes,
+ size_t& utf8_bytes_index,
+ size_t& utf8_bytes_filled)
+ {
+ utf8_bytes_index = 0;
+
+ if (JSON_HEDLEY_UNLIKELY(input.empty()))
+ {
+ utf8_bytes[0] = std::char_traits<char>::eof();
+ utf8_bytes_filled = 1;
+ }
+ else
+ {
+ // get the current character
+ const auto wc = input.get_character();
+
+ // UTF-16 to UTF-8 encoding
+ if (wc < 0x80)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+ utf8_bytes_filled = 1;
+ }
+ else if (wc <= 0x7FF)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xC0u | ((static_cast<unsigned int>(wc) >> 6u)));
+ utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+ utf8_bytes_filled = 2;
+ }
+ else if (0xD800 > wc or wc >= 0xE000)
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xE0u | ((static_cast<unsigned int>(wc) >> 12u)));
+ utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((static_cast<unsigned int>(wc) >> 6u) & 0x3Fu));
+ utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | (static_cast<unsigned int>(wc) & 0x3Fu));
+ utf8_bytes_filled = 3;
+ }
+ else
+ {
+ if (JSON_HEDLEY_UNLIKELY(not input.empty()))
+ {
+ const auto wc2 = static_cast<unsigned int>(input.get_character());
+ const auto charcode = 0x10000u + (((static_cast<unsigned int>(wc) & 0x3FFu) << 10u) | (wc2 & 0x3FFu));
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(0xF0u | (charcode >> 18u));
+ utf8_bytes[1] = static_cast<std::char_traits<char>::int_type>(0x80u | ((charcode >> 12u) & 0x3Fu));
+ utf8_bytes[2] = static_cast<std::char_traits<char>::int_type>(0x80u | ((charcode >> 6u) & 0x3Fu));
+ utf8_bytes[3] = static_cast<std::char_traits<char>::int_type>(0x80u | (charcode & 0x3Fu));
+ utf8_bytes_filled = 4;
+ }
+ else
+ {
+ utf8_bytes[0] = static_cast<std::char_traits<char>::int_type>(wc);
+ utf8_bytes_filled = 1;
+ }
+ }
+ }
+ }
+};
+
+// Wraps another input apdater to convert wide character types into individual bytes.
+template<typename BaseInputAdapter, typename WideCharType>
+class wide_string_input_adapter
+{
+ public:
+ using char_type = char;
+
+ wide_string_input_adapter(BaseInputAdapter base)
+ : base_adapter(base) {}
+
+ typename std::char_traits<char>::int_type get_character() noexcept
+ {
+ // check if buffer needs to be filled
+ if (utf8_bytes_index == utf8_bytes_filled)
+ {
+ fill_buffer<sizeof(WideCharType)>();
+
+ assert(utf8_bytes_filled > 0);
+ assert(utf8_bytes_index == 0);
+ }
+
+ // use buffer
+ assert(utf8_bytes_filled > 0);
+ assert(utf8_bytes_index < utf8_bytes_filled);
+ return utf8_bytes[utf8_bytes_index++];
+ }
+
+ private:
+ BaseInputAdapter base_adapter;
+
+ template<size_t T>
+ void fill_buffer()
+ {
+ wide_string_input_helper<BaseInputAdapter, T>::fill_buffer(base_adapter, utf8_bytes, utf8_bytes_index, utf8_bytes_filled);
+ }
+
+ /// a buffer for UTF-8 bytes
+ std::array<std::char_traits<char>::int_type, 4> utf8_bytes = {{0, 0, 0, 0}};
+
+ /// index to the utf8_codes array for the next valid byte
+ std::size_t utf8_bytes_index = 0;
+ /// number of valid bytes in the utf8_codes array
+ std::size_t utf8_bytes_filled = 0;
+};
+
+
+template<typename IteratorType, typename Enable = void>
+struct iterator_input_adapter_factory
+{
+ using iterator_type = IteratorType;
+ using char_type = typename std::iterator_traits<iterator_type>::value_type;
+ using adapter_type = iterator_input_adapter<iterator_type>;
+
+ static adapter_type create(IteratorType first, IteratorType last)
+ {
+ return adapter_type(std::move(first), std::move(last));
+ }
+};
+
+template<typename T>
+struct is_iterator_of_multibyte
+{
+ using value_type = typename std::iterator_traits<T>::value_type;
+ enum
+ {
+ value = sizeof(value_type) > 1
+ };
+};
+
+template<typename IteratorType>
+struct iterator_input_adapter_factory<IteratorType, enable_if_t<is_iterator_of_multibyte<IteratorType>::value>>
+{
+ using iterator_type = IteratorType;
+ using char_type = typename std::iterator_traits<iterator_type>::value_type;
+ using base_adapter_type = iterator_input_adapter<iterator_type>;
+ using adapter_type = wide_string_input_adapter<base_adapter_type, char_type>;
+
+ static adapter_type create(IteratorType first, IteratorType last)
+ {
+ return adapter_type(base_adapter_type(std::move(first), std::move(last)));
+ }
+};
+
+// General purpose iterator-based input
+template<typename IteratorType>
+typename iterator_input_adapter_factory<IteratorType>::adapter_type input_adapter(IteratorType first, IteratorType last)
+{
+ using factory_type = iterator_input_adapter_factory<IteratorType>;
+ return factory_type::create(first, last);
+}
+
+// Convenience shorthand from container to iterator
+template<typename ContainerType>
+auto input_adapter(const ContainerType& container) -> decltype(input_adapter(begin(container), end(container)))
+{
+ // Enable ADL
+ using std::begin;
+ using std::end;
+
+ return input_adapter(begin(container), end(container));
+}
+
+// Special cases with fast paths
+inline file_input_adapter input_adapter(std::FILE* file)
+{
+ return file_input_adapter(file);
+}
+
+inline input_stream_adapter input_adapter(std::istream& stream)
+{
+ return input_stream_adapter(stream);
+}
+
+inline input_stream_adapter input_adapter(std::istream&& stream)
+{
+ return input_stream_adapter(stream);
+}
+
+using contiguous_bytes_input_adapter = decltype(input_adapter(std::declval<const char*>(), std::declval<const char*>()));
+
+// Null-delimited strings, and the like.
+template < typename CharT,
+ typename std::enable_if <
+ std::is_pointer<CharT>::value and
+ not std::is_array<CharT>::value and
+ std::is_integral<typename std::remove_pointer<CharT>::type>::value and
+ sizeof(typename std::remove_pointer<CharT>::type) == 1,
+ int >::type = 0 >
+contiguous_bytes_input_adapter input_adapter(CharT b)
+{
+ auto length = std::strlen(reinterpret_cast<const char*>(b));
+ auto ptr = reinterpret_cast<const char*>(b);
+ return input_adapter(ptr, ptr + length);
+}
+
+template<typename T, std::size_t N>
+auto input_adapter(T (&array)[N]) -> decltype(input_adapter(array, array + N))
+{
+ return input_adapter(array, array + N);
+}
+
+// This class only handles inputs of input_buffer_adapter type.
+// It's required so that expressions like {ptr, len} can be implicitely casted
+// to the correct adapter.
+class span_input_adapter
+{
+ public:
+ template<typename CharT,
+ typename std::enable_if<
+ std::is_pointer<CharT>::value and
+ std::is_integral<typename std::remove_pointer<CharT>::type>::value and
+ sizeof(typename std::remove_pointer<CharT>::type) == 1,
+ int>::type = 0>
+ span_input_adapter(CharT b, std::size_t l)
+ : ia(reinterpret_cast<const char*>(b), reinterpret_cast<const char*>(b) + l) {}
+
+ template<class IteratorType,
+ typename std::enable_if<
+ std::is_same<typename iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value,
+ int>::type = 0>
+ span_input_adapter(IteratorType first, IteratorType last)
+ : ia(input_adapter(first, last)) {}
+
+ contiguous_bytes_input_adapter&& get()
+ {
+ return std::move(ia);
+ }
+
+ private:
+ contiguous_bytes_input_adapter ia;
+};
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/input/json_sax.hpp>
+
+
+#include <cassert> // assert
+#include <cstddef>
+#include <string> // string
+#include <utility> // move
+#include <vector> // vector
+
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+
+/*!
+@brief SAX interface
+
+This class describes the SAX interface used by @ref nlohmann::json::sax_parse.
+Each function is called in different situations while the input is parsed. The
+boolean return value informs the parser whether to continue processing the
+input.
+*/
+template<typename BasicJsonType>
+struct json_sax
+{
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using binary_t = typename BasicJsonType::binary_t;
+
+ /*!
+ @brief a null value was read
+ @return whether parsing should proceed
+ */
+ virtual bool null() = 0;
+
+ /*!
+ @brief a boolean value was read
+ @param[in] val boolean value
+ @return whether parsing should proceed
+ */
+ virtual bool boolean(bool val) = 0;
+
+ /*!
+ @brief an integer number was read
+ @param[in] val integer value
+ @return whether parsing should proceed
+ */
+ virtual bool number_integer(number_integer_t val) = 0;
+
+ /*!
+ @brief an unsigned integer number was read
+ @param[in] val unsigned integer value
+ @return whether parsing should proceed
+ */
+ virtual bool number_unsigned(number_unsigned_t val) = 0;
+
+ /*!
+ @brief an floating-point number was read
+ @param[in] val floating-point value
+ @param[in] s raw token value
+ @return whether parsing should proceed
+ */
+ virtual bool number_float(number_float_t val, const string_t& s) = 0;
+
+ /*!
+ @brief a string was read
+ @param[in] val string value
+ @return whether parsing should proceed
+ @note It is safe to move the passed string.
+ */
+ virtual bool string(string_t& val) = 0;
+
+ /*!
+ @brief a binary string was read
+ @param[in] val binary value
+ @return whether parsing should proceed
+ @note It is safe to move the passed binary.
+ */
+ virtual bool binary(binary_t& val) = 0;
+
+ /*!
+ @brief the beginning of an object was read
+ @param[in] elements number of object elements or -1 if unknown
+ @return whether parsing should proceed
+ @note binary formats may report the number of elements
+ */
+ virtual bool start_object(std::size_t elements) = 0;
+
+ /*!
+ @brief an object key was read
+ @param[in] val object key
+ @return whether parsing should proceed
+ @note It is safe to move the passed string.
+ */
+ virtual bool key(string_t& val) = 0;
+
+ /*!
+ @brief the end of an object was read
+ @return whether parsing should proceed
+ */
+ virtual bool end_object() = 0;
+
+ /*!
+ @brief the beginning of an array was read
+ @param[in] elements number of array elements or -1 if unknown
+ @return whether parsing should proceed
+ @note binary formats may report the number of elements
+ */
+ virtual bool start_array(std::size_t elements) = 0;
+
+ /*!
+ @brief the end of an array was read
+ @return whether parsing should proceed
+ */
+ virtual bool end_array() = 0;
+
+ /*!
+ @brief a parse error occurred
+ @param[in] position the position in the input where the error occurs
+ @param[in] last_token the last read token
+ @param[in] ex an exception object describing the error
+ @return whether parsing should proceed (must return false)
+ */
+ virtual bool parse_error(std::size_t position,
+ const std::string& last_token,
+ const detail::exception& ex) = 0;
+
+ virtual ~json_sax() = default;
+};
+
+
+namespace detail
+{
+/*!
+@brief SAX implementation to create a JSON value from SAX events
+
+This class implements the @ref json_sax interface and processes the SAX events
+to create a JSON value which makes it basically a DOM parser. The structure or
+hierarchy of the JSON value is managed by the stack `ref_stack` which contains
+a pointer to the respective array or object for each recursion depth.
+
+After successful parsing, the value that is passed by reference to the
+constructor contains the parsed value.
+
+@tparam BasicJsonType the JSON type
+*/
+template<typename BasicJsonType>
+class json_sax_dom_parser
+{
+ public:
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using binary_t = typename BasicJsonType::binary_t;
+
+ /*!
+ @param[in, out] r reference to a JSON value that is manipulated while
+ parsing
+ @param[in] allow_exceptions_ whether parse errors yield exceptions
+ */
+ explicit json_sax_dom_parser(BasicJsonType& r, const bool allow_exceptions_ = true)
+ : root(r), allow_exceptions(allow_exceptions_)
+ {}
+
+ // make class move-only
+ json_sax_dom_parser(const json_sax_dom_parser&) = delete;
+ json_sax_dom_parser(json_sax_dom_parser&&) = default;
+ json_sax_dom_parser& operator=(const json_sax_dom_parser&) = delete;
+ json_sax_dom_parser& operator=(json_sax_dom_parser&&) = default;
+ ~json_sax_dom_parser() = default;
+
+ bool null()
+ {
+ handle_value(nullptr);
+ return true;
+ }
+
+ bool boolean(bool val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool number_integer(number_integer_t val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool number_unsigned(number_unsigned_t val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool number_float(number_float_t val, const string_t& /*unused*/)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool string(string_t& val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool binary(binary_t& val)
+ {
+ handle_value(std::move(val));
+ return true;
+ }
+
+ bool start_object(std::size_t len)
+ {
+ ref_stack.push_back(handle_value(BasicJsonType::value_t::object));
+
+ if (JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+ {
+ JSON_THROW(out_of_range::create(408,
+ "excessive object size: " + std::to_string(len)));
+ }
+
+ return true;
+ }
+
+ bool key(string_t& val)
+ {
+ // add null at given key and store the reference for later
+ object_element = &(ref_stack.back()->m_value.object->operator[](val));
+ return true;
+ }
+
+ bool end_object()
+ {
+ ref_stack.pop_back();
+ return true;
+ }
+
+ bool start_array(std::size_t len)
+ {
+ ref_stack.push_back(handle_value(BasicJsonType::value_t::array));
+
+ if (JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+ {
+ JSON_THROW(out_of_range::create(408,
+ "excessive array size: " + std::to_string(len)));
+ }
+
+ return true;
+ }
+
+ bool end_array()
+ {
+ ref_stack.pop_back();
+ return true;
+ }
+
+ bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/,
+ const detail::exception& ex)
+ {
+ errored = true;
+ if (allow_exceptions)
+ {
+ // determine the proper exception type from the id
+ switch ((ex.id / 100) % 100)
+ {
+ case 1:
+ JSON_THROW(*static_cast<const detail::parse_error*>(&ex));
+ case 4:
+ JSON_THROW(*static_cast<const detail::out_of_range*>(&ex));
+ // LCOV_EXCL_START
+ case 2:
+ JSON_THROW(*static_cast<const detail::invalid_iterator*>(&ex));
+ case 3:
+ JSON_THROW(*static_cast<const detail::type_error*>(&ex));
+ case 5:
+ JSON_THROW(*static_cast<const detail::other_error*>(&ex));
+ default:
+ assert(false);
+ // LCOV_EXCL_STOP
+ }
+ }
+ return false;
+ }
+
+ constexpr bool is_errored() const
+ {
+ return errored;
+ }
+
+ private:
+ /*!
+ @invariant If the ref stack is empty, then the passed value will be the new
+ root.
+ @invariant If the ref stack contains a value, then it is an array or an
+ object to which we can add elements
+ */
+ template<typename Value>
+ JSON_HEDLEY_RETURNS_NON_NULL
+ BasicJsonType* handle_value(Value&& v)
+ {
+ if (ref_stack.empty())
+ {
+ root = BasicJsonType(std::forward<Value>(v));
+ return &root;
+ }
+
+ assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
+
+ if (ref_stack.back()->is_array())
+ {
+ ref_stack.back()->m_value.array->emplace_back(std::forward<Value>(v));
+ return &(ref_stack.back()->m_value.array->back());
+ }
+
+ assert(ref_stack.back()->is_object());
+ assert(object_element);
+ *object_element = BasicJsonType(std::forward<Value>(v));
+ return object_element;
+ }
+
+ /// the parsed JSON value
+ BasicJsonType& root;
+ /// stack to model hierarchy of values
+ std::vector<BasicJsonType*> ref_stack {};
+ /// helper to hold the reference for the next object element
+ BasicJsonType* object_element = nullptr;
+ /// whether a syntax error occurred
+ bool errored = false;
+ /// whether to throw exceptions in case of errors
+ const bool allow_exceptions = true;
+};
+
+template<typename BasicJsonType>
+class json_sax_dom_callback_parser
+{
+ public:
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using binary_t = typename BasicJsonType::binary_t;
+ using parser_callback_t = typename BasicJsonType::parser_callback_t;
+ using parse_event_t = typename BasicJsonType::parse_event_t;
+
+ json_sax_dom_callback_parser(BasicJsonType& r,
+ const parser_callback_t cb,
+ const bool allow_exceptions_ = true)
+ : root(r), callback(cb), allow_exceptions(allow_exceptions_)
+ {
+ keep_stack.push_back(true);
+ }
+
+ // make class move-only
+ json_sax_dom_callback_parser(const json_sax_dom_callback_parser&) = delete;
+ json_sax_dom_callback_parser(json_sax_dom_callback_parser&&) = default;
+ json_sax_dom_callback_parser& operator=(const json_sax_dom_callback_parser&) = delete;
+ json_sax_dom_callback_parser& operator=(json_sax_dom_callback_parser&&) = default;
+ ~json_sax_dom_callback_parser() = default;
+
+ bool null()
+ {
+ handle_value(nullptr);
+ return true;
+ }
+
+ bool boolean(bool val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool number_integer(number_integer_t val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool number_unsigned(number_unsigned_t val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool number_float(number_float_t val, const string_t& /*unused*/)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool string(string_t& val)
+ {
+ handle_value(val);
+ return true;
+ }
+
+ bool binary(binary_t& val)
+ {
+ handle_value(std::move(val));
+ return true;
+ }
+
+ bool start_object(std::size_t len)
+ {
+ // check callback for object start
+ const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::object_start, discarded);
+ keep_stack.push_back(keep);
+
+ auto val = handle_value(BasicJsonType::value_t::object, true);
+ ref_stack.push_back(val.second);
+
+ // check object limit
+ if (ref_stack.back() and JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+ {
+ JSON_THROW(out_of_range::create(408, "excessive object size: " + std::to_string(len)));
+ }
+
+ return true;
+ }
+
+ bool key(string_t& val)
+ {
+ BasicJsonType k = BasicJsonType(val);
+
+ // check callback for key
+ const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::key, k);
+ key_keep_stack.push_back(keep);
+
+ // add discarded value at given key and store the reference for later
+ if (keep and ref_stack.back())
+ {
+ object_element = &(ref_stack.back()->m_value.object->operator[](val) = discarded);
+ }
+
+ return true;
+ }
+
+ bool end_object()
+ {
+ if (ref_stack.back() and not callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::object_end, *ref_stack.back()))
+ {
+ // discard object
+ *ref_stack.back() = discarded;
+ }
+
+ assert(not ref_stack.empty());
+ assert(not keep_stack.empty());
+ ref_stack.pop_back();
+ keep_stack.pop_back();
+
+ if (not ref_stack.empty() and ref_stack.back() and ref_stack.back()->is_structured())
+ {
+ // remove discarded value
+ for (auto it = ref_stack.back()->begin(); it != ref_stack.back()->end(); ++it)
+ {
+ if (it->is_discarded())
+ {
+ ref_stack.back()->erase(it);
+ break;
+ }
+ }
+ }
+
+ return true;
+ }
+
+ bool start_array(std::size_t len)
+ {
+ const bool keep = callback(static_cast<int>(ref_stack.size()), parse_event_t::array_start, discarded);
+ keep_stack.push_back(keep);
+
+ auto val = handle_value(BasicJsonType::value_t::array, true);
+ ref_stack.push_back(val.second);
+
+ // check array limit
+ if (ref_stack.back() and JSON_HEDLEY_UNLIKELY(len != std::size_t(-1) and len > ref_stack.back()->max_size()))
+ {
+ JSON_THROW(out_of_range::create(408, "excessive array size: " + std::to_string(len)));
+ }
+
+ return true;
+ }
+
+ bool end_array()
+ {
+ bool keep = true;
+
+ if (ref_stack.back())
+ {
+ keep = callback(static_cast<int>(ref_stack.size()) - 1, parse_event_t::array_end, *ref_stack.back());
+ if (not keep)
+ {
+ // discard array
+ *ref_stack.back() = discarded;
+ }
+ }
+
+ assert(not ref_stack.empty());
+ assert(not keep_stack.empty());
+ ref_stack.pop_back();
+ keep_stack.pop_back();
+
+ // remove discarded value
+ if (not keep and not ref_stack.empty() and ref_stack.back()->is_array())
+ {
+ ref_stack.back()->m_value.array->pop_back();
+ }
+
+ return true;
+ }
+
+ bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/,
+ const detail::exception& ex)
+ {
+ errored = true;
+ if (allow_exceptions)
+ {
+ // determine the proper exception type from the id
+ switch ((ex.id / 100) % 100)
+ {
+ case 1:
+ JSON_THROW(*static_cast<const detail::parse_error*>(&ex));
+ case 4:
+ JSON_THROW(*static_cast<const detail::out_of_range*>(&ex));
+ // LCOV_EXCL_START
+ case 2:
+ JSON_THROW(*static_cast<const detail::invalid_iterator*>(&ex));
+ case 3:
+ JSON_THROW(*static_cast<const detail::type_error*>(&ex));
+ case 5:
+ JSON_THROW(*static_cast<const detail::other_error*>(&ex));
+ default:
+ assert(false);
+ // LCOV_EXCL_STOP
+ }
+ }
+ return false;
+ }
+
+ constexpr bool is_errored() const
+ {
+ return errored;
+ }
+
+ private:
+ /*!
+ @param[in] v value to add to the JSON value we build during parsing
+ @param[in] skip_callback whether we should skip calling the callback
+ function; this is required after start_array() and
+ start_object() SAX events, because otherwise we would call the
+ callback function with an empty array or object, respectively.
+
+ @invariant If the ref stack is empty, then the passed value will be the new
+ root.
+ @invariant If the ref stack contains a value, then it is an array or an
+ object to which we can add elements
+
+ @return pair of boolean (whether value should be kept) and pointer (to the
+ passed value in the ref_stack hierarchy; nullptr if not kept)
+ */
+ template<typename Value>
+ std::pair<bool, BasicJsonType*> handle_value(Value&& v, const bool skip_callback = false)
+ {
+ assert(not keep_stack.empty());
+
+ // do not handle this value if we know it would be added to a discarded
+ // container
+ if (not keep_stack.back())
+ {
+ return {false, nullptr};
+ }
+
+ // create value
+ auto value = BasicJsonType(std::forward<Value>(v));
+
+ // check callback
+ const bool keep = skip_callback or callback(static_cast<int>(ref_stack.size()), parse_event_t::value, value);
+
+ // do not handle this value if we just learnt it shall be discarded
+ if (not keep)
+ {
+ return {false, nullptr};
+ }
+
+ if (ref_stack.empty())
+ {
+ root = std::move(value);
+ return {true, &root};
+ }
+
+ // skip this value if we already decided to skip the parent
+ // (https://github.com/nlohmann/json/issues/971#issuecomment-413678360)
+ if (not ref_stack.back())
+ {
+ return {false, nullptr};
+ }
+
+ // we now only expect arrays and objects
+ assert(ref_stack.back()->is_array() or ref_stack.back()->is_object());
+
+ // array
+ if (ref_stack.back()->is_array())
+ {
+ ref_stack.back()->m_value.array->push_back(std::move(value));
+ return {true, &(ref_stack.back()->m_value.array->back())};
+ }
+
+ // object
+ assert(ref_stack.back()->is_object());
+ // check if we should store an element for the current key
+ assert(not key_keep_stack.empty());
+ const bool store_element = key_keep_stack.back();
+ key_keep_stack.pop_back();
+
+ if (not store_element)
+ {
+ return {false, nullptr};
+ }
+
+ assert(object_element);
+ *object_element = std::move(value);
+ return {true, object_element};
+ }
+
+ /// the parsed JSON value
+ BasicJsonType& root;
+ /// stack to model hierarchy of values
+ std::vector<BasicJsonType*> ref_stack {};
+ /// stack to manage which values to keep
+ std::vector<bool> keep_stack {};
+ /// stack to manage which object keys to keep
+ std::vector<bool> key_keep_stack {};
+ /// helper to hold the reference for the next object element
+ BasicJsonType* object_element = nullptr;
+ /// whether a syntax error occurred
+ bool errored = false;
+ /// callback function
+ const parser_callback_t callback = nullptr;
+ /// whether to throw exceptions in case of errors
+ const bool allow_exceptions = true;
+ /// a discarded value for the callback
+ BasicJsonType discarded = BasicJsonType::value_t::discarded;
+};
+
+template<typename BasicJsonType>
+class json_sax_acceptor
+{
+ public:
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using binary_t = typename BasicJsonType::binary_t;
+
+ bool null()
+ {
+ return true;
+ }
+
+ bool boolean(bool /*unused*/)
+ {
+ return true;
+ }
+
+ bool number_integer(number_integer_t /*unused*/)
+ {
+ return true;
+ }
+
+ bool number_unsigned(number_unsigned_t /*unused*/)
+ {
+ return true;
+ }
+
+ bool number_float(number_float_t /*unused*/, const string_t& /*unused*/)
+ {
+ return true;
+ }
+
+ bool string(string_t& /*unused*/)
+ {
+ return true;
+ }
+
+ bool binary(binary_t& /*unused*/)
+ {
+ return true;
+ }
+
+ bool start_object(std::size_t /*unused*/ = std::size_t(-1))
+ {
+ return true;
+ }
+
+ bool key(string_t& /*unused*/)
+ {
+ return true;
+ }
+
+ bool end_object()
+ {
+ return true;
+ }
+
+ bool start_array(std::size_t /*unused*/ = std::size_t(-1))
+ {
+ return true;
+ }
+
+ bool end_array()
+ {
+ return true;
+ }
+
+ bool parse_error(std::size_t /*unused*/, const std::string& /*unused*/, const detail::exception& /*unused*/)
+ {
+ return false;
+ }
+};
+} // namespace detail
+
+} // namespace nlohmann
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/is_sax.hpp>
+
+
+#include <cstdint> // size_t
+#include <utility> // declval
+#include <string> // string
+
+// #include <nlohmann/detail/meta/detected.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+template <typename T>
+using null_function_t = decltype(std::declval<T&>().null());
+
+template <typename T>
+using boolean_function_t =
+ decltype(std::declval<T&>().boolean(std::declval<bool>()));
+
+template <typename T, typename Integer>
+using number_integer_function_t =
+ decltype(std::declval<T&>().number_integer(std::declval<Integer>()));
+
+template <typename T, typename Unsigned>
+using number_unsigned_function_t =
+ decltype(std::declval<T&>().number_unsigned(std::declval<Unsigned>()));
+
+template <typename T, typename Float, typename String>
+using number_float_function_t = decltype(std::declval<T&>().number_float(
+ std::declval<Float>(), std::declval<const String&>()));
+
+template <typename T, typename String>
+using string_function_t =
+ decltype(std::declval<T&>().string(std::declval<String&>()));
+
+template <typename T>
+using start_object_function_t =
+ decltype(std::declval<T&>().start_object(std::declval<std::size_t>()));
+
+template <typename T, typename String>
+using key_function_t =
+ decltype(std::declval<T&>().key(std::declval<String&>()));
+
+template <typename T>
+using end_object_function_t = decltype(std::declval<T&>().end_object());
+
+template <typename T>
+using start_array_function_t =
+ decltype(std::declval<T&>().start_array(std::declval<std::size_t>()));
+
+template <typename T>
+using end_array_function_t = decltype(std::declval<T&>().end_array());
+
+template <typename T, typename Exception>
+using parse_error_function_t = decltype(std::declval<T&>().parse_error(
+ std::declval<std::size_t>(), std::declval<const std::string&>(),
+ std::declval<const Exception&>()));
+
+template <typename SAX, typename BasicJsonType>
+struct is_sax
+{
+ private:
+ static_assert(is_basic_json<BasicJsonType>::value,
+ "BasicJsonType must be of type basic_json<...>");
+
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using exception_t = typename BasicJsonType::exception;
+
+ public:
+ static constexpr bool value =
+ is_detected_exact<bool, null_function_t, SAX>::value &&
+ is_detected_exact<bool, boolean_function_t, SAX>::value &&
+ is_detected_exact<bool, number_integer_function_t, SAX,
+ number_integer_t>::value &&
+ is_detected_exact<bool, number_unsigned_function_t, SAX,
+ number_unsigned_t>::value &&
+ is_detected_exact<bool, number_float_function_t, SAX, number_float_t,
+ string_t>::value &&
+ is_detected_exact<bool, string_function_t, SAX, string_t>::value &&
+ is_detected_exact<bool, start_object_function_t, SAX>::value &&
+ is_detected_exact<bool, key_function_t, SAX, string_t>::value &&
+ is_detected_exact<bool, end_object_function_t, SAX>::value &&
+ is_detected_exact<bool, start_array_function_t, SAX>::value &&
+ is_detected_exact<bool, end_array_function_t, SAX>::value &&
+ is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value;
+};
+
+template <typename SAX, typename BasicJsonType>
+struct is_sax_static_asserts
+{
+ private:
+ static_assert(is_basic_json<BasicJsonType>::value,
+ "BasicJsonType must be of type basic_json<...>");
+
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using exception_t = typename BasicJsonType::exception;
+
+ public:
+ static_assert(is_detected_exact<bool, null_function_t, SAX>::value,
+ "Missing/invalid function: bool null()");
+ static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+ "Missing/invalid function: bool boolean(bool)");
+ static_assert(is_detected_exact<bool, boolean_function_t, SAX>::value,
+ "Missing/invalid function: bool boolean(bool)");
+ static_assert(
+ is_detected_exact<bool, number_integer_function_t, SAX,
+ number_integer_t>::value,
+ "Missing/invalid function: bool number_integer(number_integer_t)");
+ static_assert(
+ is_detected_exact<bool, number_unsigned_function_t, SAX,
+ number_unsigned_t>::value,
+ "Missing/invalid function: bool number_unsigned(number_unsigned_t)");
+ static_assert(is_detected_exact<bool, number_float_function_t, SAX,
+ number_float_t, string_t>::value,
+ "Missing/invalid function: bool number_float(number_float_t, const string_t&)");
+ static_assert(
+ is_detected_exact<bool, string_function_t, SAX, string_t>::value,
+ "Missing/invalid function: bool string(string_t&)");
+ static_assert(is_detected_exact<bool, start_object_function_t, SAX>::value,
+ "Missing/invalid function: bool start_object(std::size_t)");
+ static_assert(is_detected_exact<bool, key_function_t, SAX, string_t>::value,
+ "Missing/invalid function: bool key(string_t&)");
+ static_assert(is_detected_exact<bool, end_object_function_t, SAX>::value,
+ "Missing/invalid function: bool end_object()");
+ static_assert(is_detected_exact<bool, start_array_function_t, SAX>::value,
+ "Missing/invalid function: bool start_array(std::size_t)");
+ static_assert(is_detected_exact<bool, end_array_function_t, SAX>::value,
+ "Missing/invalid function: bool end_array()");
+ static_assert(
+ is_detected_exact<bool, parse_error_function_t, SAX, exception_t>::value,
+ "Missing/invalid function: bool parse_error(std::size_t, const "
+ "std::string&, const exception&)");
+};
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+
+/*!
+@brief determine system byte order
+
+@return true if and only if system's byte order is little endian
+
+@note from https://stackoverflow.com/a/1001328/266378
+*/
+static inline bool little_endianess(int num = 1) noexcept
+{
+ return *reinterpret_cast<char*>(&num) == 1;
+}
+
+
+///////////////////
+// binary reader //
+///////////////////
+
+/*!
+@brief deserialization of CBOR, MessagePack, and UBJSON values
+*/
+template<typename BasicJsonType, typename InputAdapterType, typename SAX = json_sax_dom_parser<BasicJsonType>>
+class binary_reader
+{
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using binary_t = typename BasicJsonType::binary_t;
+ using json_sax_t = SAX;
+ using char_type = typename InputAdapterType::char_type;
+ using char_int_type = typename std::char_traits<char_type>::int_type;
+
+ public:
+ /*!
+ @brief create a binary reader
+
+ @param[in] adapter input adapter to read from
+ */
+ explicit binary_reader(InputAdapterType&& adapter) : ia(std::move(adapter))
+ {
+ (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
+ }
+
+ // make class move-only
+ binary_reader(const binary_reader&) = delete;
+ binary_reader(binary_reader&&) = default;
+ binary_reader& operator=(const binary_reader&) = delete;
+ binary_reader& operator=(binary_reader&&) = default;
+ ~binary_reader() = default;
+
+ /*!
+ @param[in] format the binary format to parse
+ @param[in] sax_ a SAX event processor
+ @param[in] strict whether to expect the input to be consumed completed
+
+ @return
+ */
+ JSON_HEDLEY_NON_NULL(3)
+ bool sax_parse(const input_format_t format,
+ json_sax_t* sax_,
+ const bool strict = true)
+ {
+ sax = sax_;
+ bool result = false;
+
+ switch (format)
+ {
+ case input_format_t::bson:
+ result = parse_bson_internal();
+ break;
+
+ case input_format_t::cbor:
+ result = parse_cbor_internal();
+ break;
+
+ case input_format_t::msgpack:
+ result = parse_msgpack_internal();
+ break;
+
+ case input_format_t::ubjson:
+ result = parse_ubjson_internal();
+ break;
+
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
+ }
+
+ // strict mode: next byte must be EOF
+ if (result and strict)
+ {
+ if (format == input_format_t::ubjson)
+ {
+ get_ignore_noop();
+ }
+ else
+ {
+ get();
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(current != std::char_traits<char_type>::eof()))
+ {
+ return sax->parse_error(chars_read, get_token_string(),
+ parse_error::create(110, chars_read, exception_message(format, "expected end of input; last byte: 0x" + get_token_string(), "value")));
+ }
+ }
+
+ return result;
+ }
+
+ private:
+ //////////
+ // BSON //
+ //////////
+
+ /*!
+ @brief Reads in a BSON-object and passes it to the SAX-parser.
+ @return whether a valid BSON-value was passed to the SAX parser
+ */
+ bool parse_bson_internal()
+ {
+ std::int32_t document_size;
+ get_number<std::int32_t, true>(input_format_t::bson, document_size);
+
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_object(std::size_t(-1))))
+ {
+ return false;
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not parse_bson_element_list(/*is_array*/false)))
+ {
+ return false;
+ }
+
+ return sax->end_object();
+ }
+
+ /*!
+ @brief Parses a C-style string from the BSON input.
+ @param[in, out] result A reference to the string variable where the read
+ string is to be stored.
+ @return `true` if the \x00-byte indicating the end of the string was
+ encountered before the EOF; false` indicates an unexpected EOF.
+ */
+ bool get_bson_cstr(string_t& result)
+ {
+ auto out = std::back_inserter(result);
+ while (true)
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::bson, "cstring")))
+ {
+ return false;
+ }
+ if (current == 0x00)
+ {
+ return true;
+ }
+ *out++ = static_cast<typename string_t::value_type>(current);
+ }
+
+ return true;
+ }
+
+ /*!
+ @brief Parses a zero-terminated string of length @a len from the BSON
+ input.
+ @param[in] len The length (including the zero-byte at the end) of the
+ string to be read.
+ @param[in, out] result A reference to the string variable where the read
+ string is to be stored.
+ @tparam NumberType The type of the length @a len
+ @pre len >= 1
+ @return `true` if the string was successfully parsed
+ */
+ template<typename NumberType>
+ bool get_bson_string(const NumberType len, string_t& result)
+ {
+ if (JSON_HEDLEY_UNLIKELY(len < 1))
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::bson, "string length must be at least 1, is " + std::to_string(len), "string")));
+ }
+
+ return get_string(input_format_t::bson, len - static_cast<NumberType>(1), result) and get() != std::char_traits<char_type>::eof();
+ }
+
+ /*!
+ @brief Parses a byte array input of length @a len from the BSON input.
+ @param[in] len The length of the byte array to be read.
+ @param[in, out] result A reference to the binary variable where the read
+ array is to be stored.
+ @tparam NumberType The type of the length @a len
+ @pre len >= 0
+ @return `true` if the byte array was successfully parsed
+ */
+ template<typename NumberType>
+ bool get_bson_binary(const NumberType len, binary_t& result)
+ {
+ if (JSON_HEDLEY_UNLIKELY(len < 0))
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::bson, "byte array length cannot be negative, is " + std::to_string(len), "binary")));
+ }
+
+ // All BSON binary values have a subtype
+ std::uint8_t subtype;
+ get_number<std::uint8_t>(input_format_t::bson, subtype);
+ result.set_subtype(subtype);
+
+ return get_binary(input_format_t::bson, len, result);
+ }
+
+ /*!
+ @brief Read a BSON document element of the given @a element_type.
+ @param[in] element_type The BSON element type, c.f. http://bsonspec.org/spec.html
+ @param[in] element_type_parse_position The position in the input stream,
+ where the `element_type` was read.
+ @warning Not all BSON element types are supported yet. An unsupported
+ @a element_type will give rise to a parse_error.114:
+ Unsupported BSON record type 0x...
+ @return whether a valid BSON-object/array was passed to the SAX parser
+ */
+ bool parse_bson_element_internal(const char_int_type element_type,
+ const std::size_t element_type_parse_position)
+ {
+ switch (element_type)
+ {
+ case 0x01: // double
+ {
+ double number;
+ return get_number<double, true>(input_format_t::bson, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ case 0x02: // string
+ {
+ std::int32_t len;
+ string_t value;
+ return get_number<std::int32_t, true>(input_format_t::bson, len) and get_bson_string(len, value) and sax->string(value);
+ }
+
+ case 0x03: // object
+ {
+ return parse_bson_internal();
+ }
+
+ case 0x04: // array
+ {
+ return parse_bson_array();
+ }
+
+ case 0x05: // binary
+ {
+ std::int32_t len;
+ binary_t value;
+ return get_number<std::int32_t, true>(input_format_t::bson, len) and get_bson_binary(len, value) and sax->binary(value);
+ }
+
+ case 0x08: // boolean
+ {
+ return sax->boolean(get() != 0);
+ }
+
+ case 0x0A: // null
+ {
+ return sax->null();
+ }
+
+ case 0x10: // int32
+ {
+ std::int32_t value;
+ return get_number<std::int32_t, true>(input_format_t::bson, value) and sax->number_integer(value);
+ }
+
+ case 0x12: // int64
+ {
+ std::int64_t value;
+ return get_number<std::int64_t, true>(input_format_t::bson, value) and sax->number_integer(value);
+ }
+
+ default: // anything else not supported (yet)
+ {
+ std::array<char, 3> cr{{}};
+ (std::snprintf)(cr.data(), cr.size(), "%.2hhX", static_cast<unsigned char>(element_type));
+ return sax->parse_error(element_type_parse_position, std::string(cr.data()), parse_error::create(114, element_type_parse_position, "Unsupported BSON record type 0x" + std::string(cr.data())));
+ }
+ }
+ }
+
+ /*!
+ @brief Read a BSON element list (as specified in the BSON-spec)
+
+ The same binary layout is used for objects and arrays, hence it must be
+ indicated with the argument @a is_array which one is expected
+ (true --> array, false --> object).
+
+ @param[in] is_array Determines if the element list being read is to be
+ treated as an object (@a is_array == false), or as an
+ array (@a is_array == true).
+ @return whether a valid BSON-object/array was passed to the SAX parser
+ */
+ bool parse_bson_element_list(const bool is_array)
+ {
+ string_t key;
+
+ while (auto element_type = get())
+ {
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::bson, "element list")))
+ {
+ return false;
+ }
+
+ const std::size_t element_type_parse_position = chars_read;
+ if (JSON_HEDLEY_UNLIKELY(not get_bson_cstr(key)))
+ {
+ return false;
+ }
+
+ if (not is_array and not sax->key(key))
+ {
+ return false;
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not parse_bson_element_internal(element_type, element_type_parse_position)))
+ {
+ return false;
+ }
+
+ // get_bson_cstr only appends
+ key.clear();
+ }
+
+ return true;
+ }
+
+ /*!
+ @brief Reads an array from the BSON input and passes it to the SAX-parser.
+ @return whether a valid BSON-array was passed to the SAX parser
+ */
+ bool parse_bson_array()
+ {
+ std::int32_t document_size;
+ get_number<std::int32_t, true>(input_format_t::bson, document_size);
+
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_array(std::size_t(-1))))
+ {
+ return false;
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not parse_bson_element_list(/*is_array*/true)))
+ {
+ return false;
+ }
+
+ return sax->end_array();
+ }
+
+ //////////
+ // CBOR //
+ //////////
+
+ /*!
+ @param[in] get_char whether a new character should be retrieved from the
+ input (true, default) or whether the last read
+ character should be considered instead
+
+ @return whether a valid CBOR value was passed to the SAX parser
+ */
+ bool parse_cbor_internal(const bool get_char = true)
+ {
+ switch (get_char ? get() : current)
+ {
+ // EOF
+ case std::char_traits<char_type>::eof():
+ return unexpect_eof(input_format_t::cbor, "value");
+
+ // Integer 0x00..0x17 (0..23)
+ case 0x00:
+ case 0x01:
+ case 0x02:
+ case 0x03:
+ case 0x04:
+ case 0x05:
+ case 0x06:
+ case 0x07:
+ case 0x08:
+ case 0x09:
+ case 0x0A:
+ case 0x0B:
+ case 0x0C:
+ case 0x0D:
+ case 0x0E:
+ case 0x0F:
+ case 0x10:
+ case 0x11:
+ case 0x12:
+ case 0x13:
+ case 0x14:
+ case 0x15:
+ case 0x16:
+ case 0x17:
+ return sax->number_unsigned(static_cast<number_unsigned_t>(current));
+
+ case 0x18: // Unsigned integer (one-byte uint8_t follows)
+ {
+ std::uint8_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
+ }
+
+ case 0x19: // Unsigned integer (two-byte uint16_t follows)
+ {
+ std::uint16_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
+ }
+
+ case 0x1A: // Unsigned integer (four-byte uint32_t follows)
+ {
+ std::uint32_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
+ }
+
+ case 0x1B: // Unsigned integer (eight-byte uint64_t follows)
+ {
+ std::uint64_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_unsigned(number);
+ }
+
+ // Negative integer -1-0x00..-1-0x17 (-1..-24)
+ case 0x20:
+ case 0x21:
+ case 0x22:
+ case 0x23:
+ case 0x24:
+ case 0x25:
+ case 0x26:
+ case 0x27:
+ case 0x28:
+ case 0x29:
+ case 0x2A:
+ case 0x2B:
+ case 0x2C:
+ case 0x2D:
+ case 0x2E:
+ case 0x2F:
+ case 0x30:
+ case 0x31:
+ case 0x32:
+ case 0x33:
+ case 0x34:
+ case 0x35:
+ case 0x36:
+ case 0x37:
+ return sax->number_integer(static_cast<std::int8_t>(0x20 - 1 - current));
+
+ case 0x38: // Negative integer (one-byte uint8_t follows)
+ {
+ std::uint8_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
+ }
+
+ case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
+ {
+ std::uint16_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
+ }
+
+ case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
+ {
+ std::uint32_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1) - number);
+ }
+
+ case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
+ {
+ std::uint64_t number;
+ return get_number(input_format_t::cbor, number) and sax->number_integer(static_cast<number_integer_t>(-1)
+ - static_cast<number_integer_t>(number));
+ }
+
+ // Binary data (0x00..0x17 bytes follow)
+ case 0x40:
+ case 0x41:
+ case 0x42:
+ case 0x43:
+ case 0x44:
+ case 0x45:
+ case 0x46:
+ case 0x47:
+ case 0x48:
+ case 0x49:
+ case 0x4A:
+ case 0x4B:
+ case 0x4C:
+ case 0x4D:
+ case 0x4E:
+ case 0x4F:
+ case 0x50:
+ case 0x51:
+ case 0x52:
+ case 0x53:
+ case 0x54:
+ case 0x55:
+ case 0x56:
+ case 0x57:
+ case 0x58: // Binary data (one-byte uint8_t for n follows)
+ case 0x59: // Binary data (two-byte uint16_t for n follow)
+ case 0x5A: // Binary data (four-byte uint32_t for n follow)
+ case 0x5B: // Binary data (eight-byte uint64_t for n follow)
+ case 0x5F: // Binary data (indefinite length)
+ {
+ binary_t b;
+ return get_cbor_binary(b) and sax->binary(b);
+ }
+
+ // UTF-8 string (0x00..0x17 bytes follow)
+ case 0x60:
+ case 0x61:
+ case 0x62:
+ case 0x63:
+ case 0x64:
+ case 0x65:
+ case 0x66:
+ case 0x67:
+ case 0x68:
+ case 0x69:
+ case 0x6A:
+ case 0x6B:
+ case 0x6C:
+ case 0x6D:
+ case 0x6E:
+ case 0x6F:
+ case 0x70:
+ case 0x71:
+ case 0x72:
+ case 0x73:
+ case 0x74:
+ case 0x75:
+ case 0x76:
+ case 0x77:
+ case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
+ case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
+ case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
+ case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
+ case 0x7F: // UTF-8 string (indefinite length)
+ {
+ string_t s;
+ return get_cbor_string(s) and sax->string(s);
+ }
+
+ // array (0x00..0x17 data items follow)
+ case 0x80:
+ case 0x81:
+ case 0x82:
+ case 0x83:
+ case 0x84:
+ case 0x85:
+ case 0x86:
+ case 0x87:
+ case 0x88:
+ case 0x89:
+ case 0x8A:
+ case 0x8B:
+ case 0x8C:
+ case 0x8D:
+ case 0x8E:
+ case 0x8F:
+ case 0x90:
+ case 0x91:
+ case 0x92:
+ case 0x93:
+ case 0x94:
+ case 0x95:
+ case 0x96:
+ case 0x97:
+ return get_cbor_array(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x1Fu));
+
+ case 0x98: // array (one-byte uint8_t for n follows)
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
+ }
+
+ case 0x99: // array (two-byte uint16_t for n follow)
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
+ }
+
+ case 0x9A: // array (four-byte uint32_t for n follow)
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
+ }
+
+ case 0x9B: // array (eight-byte uint64_t for n follow)
+ {
+ std::uint64_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_array(static_cast<std::size_t>(len));
+ }
+
+ case 0x9F: // array (indefinite length)
+ return get_cbor_array(std::size_t(-1));
+
+ // map (0x00..0x17 pairs of data items follow)
+ case 0xA0:
+ case 0xA1:
+ case 0xA2:
+ case 0xA3:
+ case 0xA4:
+ case 0xA5:
+ case 0xA6:
+ case 0xA7:
+ case 0xA8:
+ case 0xA9:
+ case 0xAA:
+ case 0xAB:
+ case 0xAC:
+ case 0xAD:
+ case 0xAE:
+ case 0xAF:
+ case 0xB0:
+ case 0xB1:
+ case 0xB2:
+ case 0xB3:
+ case 0xB4:
+ case 0xB5:
+ case 0xB6:
+ case 0xB7:
+ return get_cbor_object(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x1Fu));
+
+ case 0xB8: // map (one-byte uint8_t for n follows)
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
+ }
+
+ case 0xB9: // map (two-byte uint16_t for n follow)
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
+ }
+
+ case 0xBA: // map (four-byte uint32_t for n follow)
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
+ }
+
+ case 0xBB: // map (eight-byte uint64_t for n follow)
+ {
+ std::uint64_t len;
+ return get_number(input_format_t::cbor, len) and get_cbor_object(static_cast<std::size_t>(len));
+ }
+
+ case 0xBF: // map (indefinite length)
+ return get_cbor_object(std::size_t(-1));
+
+ case 0xF4: // false
+ return sax->boolean(false);
+
+ case 0xF5: // true
+ return sax->boolean(true);
+
+ case 0xF6: // null
+ return sax->null();
+
+ case 0xF9: // Half-Precision Float (two-byte IEEE 754)
+ {
+ const auto byte1_raw = get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::cbor, "number")))
+ {
+ return false;
+ }
+ const auto byte2_raw = get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::cbor, "number")))
+ {
+ return false;
+ }
+
+ const auto byte1 = static_cast<unsigned char>(byte1_raw);
+ const auto byte2 = static_cast<unsigned char>(byte2_raw);
+
+ // code from RFC 7049, Appendix D, Figure 3:
+ // As half-precision floating-point numbers were only added
+ // to IEEE 754 in 2008, today's programming platforms often
+ // still only have limited support for them. It is very
+ // easy to include at least decoding support for them even
+ // without such support. An example of a small decoder for
+ // half-precision floating-point numbers in the C language
+ // is shown in Fig. 3.
+ const auto half = static_cast<unsigned int>((byte1 << 8u) + byte2);
+ const double val = [&half]
+ {
+ const int exp = (half >> 10u) & 0x1Fu;
+ const unsigned int mant = half & 0x3FFu;
+ assert(0 <= exp and exp <= 32);
+ assert(mant <= 1024);
+ switch (exp)
+ {
+ case 0:
+ return std::ldexp(mant, -24);
+ case 31:
+ return (mant == 0)
+ ? std::numeric_limits<double>::infinity()
+ : std::numeric_limits<double>::quiet_NaN();
+ default:
+ return std::ldexp(mant + 1024, exp - 25);
+ }
+ }();
+ return sax->number_float((half & 0x8000u) != 0
+ ? static_cast<number_float_t>(-val)
+ : static_cast<number_float_t>(val), "");
+ }
+
+ case 0xFA: // Single-Precision Float (four-byte IEEE 754)
+ {
+ float number;
+ return get_number(input_format_t::cbor, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ case 0xFB: // Double-Precision Float (eight-byte IEEE 754)
+ {
+ double number;
+ return get_number(input_format_t::cbor, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ default: // anything else (0xFF is handled inside the other types)
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::cbor, "invalid byte: 0x" + last_token, "value")));
+ }
+ }
+ }
+
+ /*!
+ @brief reads a CBOR string
+
+ This function first reads starting bytes to determine the expected
+ string length and then copies this number of bytes into a string.
+ Additionally, CBOR's strings with indefinite lengths are supported.
+
+ @param[out] result created string
+
+ @return whether string creation completed
+ */
+ bool get_cbor_string(string_t& result)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::cbor, "string")))
+ {
+ return false;
+ }
+
+ switch (current)
+ {
+ // UTF-8 string (0x00..0x17 bytes follow)
+ case 0x60:
+ case 0x61:
+ case 0x62:
+ case 0x63:
+ case 0x64:
+ case 0x65:
+ case 0x66:
+ case 0x67:
+ case 0x68:
+ case 0x69:
+ case 0x6A:
+ case 0x6B:
+ case 0x6C:
+ case 0x6D:
+ case 0x6E:
+ case 0x6F:
+ case 0x70:
+ case 0x71:
+ case 0x72:
+ case 0x73:
+ case 0x74:
+ case 0x75:
+ case 0x76:
+ case 0x77:
+ {
+ return get_string(input_format_t::cbor, static_cast<unsigned int>(current) & 0x1Fu, result);
+ }
+
+ case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
+ }
+
+ case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
+ }
+
+ case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
+ }
+
+ case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
+ {
+ std::uint64_t len;
+ return get_number(input_format_t::cbor, len) and get_string(input_format_t::cbor, len, result);
+ }
+
+ case 0x7F: // UTF-8 string (indefinite length)
+ {
+ while (get() != 0xFF)
+ {
+ string_t chunk;
+ if (not get_cbor_string(chunk))
+ {
+ return false;
+ }
+ result.append(chunk);
+ }
+ return true;
+ }
+
+ default:
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::cbor, "expected length specification (0x60-0x7B) or indefinite string type (0x7F); last byte: 0x" + last_token, "string")));
+ }
+ }
+ }
+
+ /*!
+ @brief reads a CBOR byte array
+
+ This function first reads starting bytes to determine the expected
+ byte array length and then copies this number of bytes into the byte array.
+ Additionally, CBOR's byte arrays with indefinite lengths are supported.
+
+ @param[out] result created byte array
+
+ @return whether byte array creation completed
+ */
+ bool get_cbor_binary(binary_t& result)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::cbor, "binary")))
+ {
+ return false;
+ }
+
+ switch (current)
+ {
+ // Binary data (0x00..0x17 bytes follow)
+ case 0x40:
+ case 0x41:
+ case 0x42:
+ case 0x43:
+ case 0x44:
+ case 0x45:
+ case 0x46:
+ case 0x47:
+ case 0x48:
+ case 0x49:
+ case 0x4A:
+ case 0x4B:
+ case 0x4C:
+ case 0x4D:
+ case 0x4E:
+ case 0x4F:
+ case 0x50:
+ case 0x51:
+ case 0x52:
+ case 0x53:
+ case 0x54:
+ case 0x55:
+ case 0x56:
+ case 0x57:
+ {
+ return get_binary(input_format_t::cbor, static_cast<unsigned int>(current) & 0x1Fu, result);
+ }
+
+ case 0x58: // Binary data (one-byte uint8_t for n follows)
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::cbor, len) and
+ get_binary(input_format_t::cbor, len, result);
+ }
+
+ case 0x59: // Binary data (two-byte uint16_t for n follow)
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::cbor, len) and
+ get_binary(input_format_t::cbor, len, result);
+ }
+
+ case 0x5A: // Binary data (four-byte uint32_t for n follow)
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::cbor, len) and
+ get_binary(input_format_t::cbor, len, result);
+ }
+
+ case 0x5B: // Binary data (eight-byte uint64_t for n follow)
+ {
+ std::uint64_t len;
+ return get_number(input_format_t::cbor, len) and
+ get_binary(input_format_t::cbor, len, result);
+ }
+
+ case 0x5F: // Binary data (indefinite length)
+ {
+ while (get() != 0xFF)
+ {
+ binary_t chunk;
+ if (not get_cbor_binary(chunk))
+ {
+ return false;
+ }
+ result.insert(result.end(), chunk.begin(), chunk.end());
+ }
+ return true;
+ }
+
+ default:
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::cbor, "expected length specification (0x40-0x5B) or indefinite binary array type (0x5F); last byte: 0x" + last_token, "binary")));
+ }
+ }
+ }
+
+ /*!
+ @param[in] len the length of the array or std::size_t(-1) for an
+ array of indefinite size
+ @return whether array creation completed
+ */
+ bool get_cbor_array(const std::size_t len)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_array(len)))
+ {
+ return false;
+ }
+
+ if (len != std::size_t(-1))
+ {
+ for (std::size_t i = 0; i < len; ++i)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not parse_cbor_internal()))
+ {
+ return false;
+ }
+ }
+ }
+ else
+ {
+ while (get() != 0xFF)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not parse_cbor_internal(false)))
+ {
+ return false;
+ }
+ }
+ }
+
+ return sax->end_array();
+ }
+
+ /*!
+ @param[in] len the length of the object or std::size_t(-1) for an
+ object of indefinite size
+ @return whether object creation completed
+ */
+ bool get_cbor_object(const std::size_t len)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_object(len)))
+ {
+ return false;
+ }
+
+ string_t key;
+ if (len != std::size_t(-1))
+ {
+ for (std::size_t i = 0; i < len; ++i)
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not get_cbor_string(key) or not sax->key(key)))
+ {
+ return false;
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not parse_cbor_internal()))
+ {
+ return false;
+ }
+ key.clear();
+ }
+ }
+ else
+ {
+ while (get() != 0xFF)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not get_cbor_string(key) or not sax->key(key)))
+ {
+ return false;
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not parse_cbor_internal()))
+ {
+ return false;
+ }
+ key.clear();
+ }
+ }
+
+ return sax->end_object();
+ }
+
+ /////////////
+ // MsgPack //
+ /////////////
+
+ /*!
+ @return whether a valid MessagePack value was passed to the SAX parser
+ */
+ bool parse_msgpack_internal()
+ {
+ switch (get())
+ {
+ // EOF
+ case std::char_traits<char_type>::eof():
+ return unexpect_eof(input_format_t::msgpack, "value");
+
+ // positive fixint
+ case 0x00:
+ case 0x01:
+ case 0x02:
+ case 0x03:
+ case 0x04:
+ case 0x05:
+ case 0x06:
+ case 0x07:
+ case 0x08:
+ case 0x09:
+ case 0x0A:
+ case 0x0B:
+ case 0x0C:
+ case 0x0D:
+ case 0x0E:
+ case 0x0F:
+ case 0x10:
+ case 0x11:
+ case 0x12:
+ case 0x13:
+ case 0x14:
+ case 0x15:
+ case 0x16:
+ case 0x17:
+ case 0x18:
+ case 0x19:
+ case 0x1A:
+ case 0x1B:
+ case 0x1C:
+ case 0x1D:
+ case 0x1E:
+ case 0x1F:
+ case 0x20:
+ case 0x21:
+ case 0x22:
+ case 0x23:
+ case 0x24:
+ case 0x25:
+ case 0x26:
+ case 0x27:
+ case 0x28:
+ case 0x29:
+ case 0x2A:
+ case 0x2B:
+ case 0x2C:
+ case 0x2D:
+ case 0x2E:
+ case 0x2F:
+ case 0x30:
+ case 0x31:
+ case 0x32:
+ case 0x33:
+ case 0x34:
+ case 0x35:
+ case 0x36:
+ case 0x37:
+ case 0x38:
+ case 0x39:
+ case 0x3A:
+ case 0x3B:
+ case 0x3C:
+ case 0x3D:
+ case 0x3E:
+ case 0x3F:
+ case 0x40:
+ case 0x41:
+ case 0x42:
+ case 0x43:
+ case 0x44:
+ case 0x45:
+ case 0x46:
+ case 0x47:
+ case 0x48:
+ case 0x49:
+ case 0x4A:
+ case 0x4B:
+ case 0x4C:
+ case 0x4D:
+ case 0x4E:
+ case 0x4F:
+ case 0x50:
+ case 0x51:
+ case 0x52:
+ case 0x53:
+ case 0x54:
+ case 0x55:
+ case 0x56:
+ case 0x57:
+ case 0x58:
+ case 0x59:
+ case 0x5A:
+ case 0x5B:
+ case 0x5C:
+ case 0x5D:
+ case 0x5E:
+ case 0x5F:
+ case 0x60:
+ case 0x61:
+ case 0x62:
+ case 0x63:
+ case 0x64:
+ case 0x65:
+ case 0x66:
+ case 0x67:
+ case 0x68:
+ case 0x69:
+ case 0x6A:
+ case 0x6B:
+ case 0x6C:
+ case 0x6D:
+ case 0x6E:
+ case 0x6F:
+ case 0x70:
+ case 0x71:
+ case 0x72:
+ case 0x73:
+ case 0x74:
+ case 0x75:
+ case 0x76:
+ case 0x77:
+ case 0x78:
+ case 0x79:
+ case 0x7A:
+ case 0x7B:
+ case 0x7C:
+ case 0x7D:
+ case 0x7E:
+ case 0x7F:
+ return sax->number_unsigned(static_cast<number_unsigned_t>(current));
+
+ // fixmap
+ case 0x80:
+ case 0x81:
+ case 0x82:
+ case 0x83:
+ case 0x84:
+ case 0x85:
+ case 0x86:
+ case 0x87:
+ case 0x88:
+ case 0x89:
+ case 0x8A:
+ case 0x8B:
+ case 0x8C:
+ case 0x8D:
+ case 0x8E:
+ case 0x8F:
+ return get_msgpack_object(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x0Fu));
+
+ // fixarray
+ case 0x90:
+ case 0x91:
+ case 0x92:
+ case 0x93:
+ case 0x94:
+ case 0x95:
+ case 0x96:
+ case 0x97:
+ case 0x98:
+ case 0x99:
+ case 0x9A:
+ case 0x9B:
+ case 0x9C:
+ case 0x9D:
+ case 0x9E:
+ case 0x9F:
+ return get_msgpack_array(static_cast<std::size_t>(static_cast<unsigned int>(current) & 0x0Fu));
+
+ // fixstr
+ case 0xA0:
+ case 0xA1:
+ case 0xA2:
+ case 0xA3:
+ case 0xA4:
+ case 0xA5:
+ case 0xA6:
+ case 0xA7:
+ case 0xA8:
+ case 0xA9:
+ case 0xAA:
+ case 0xAB:
+ case 0xAC:
+ case 0xAD:
+ case 0xAE:
+ case 0xAF:
+ case 0xB0:
+ case 0xB1:
+ case 0xB2:
+ case 0xB3:
+ case 0xB4:
+ case 0xB5:
+ case 0xB6:
+ case 0xB7:
+ case 0xB8:
+ case 0xB9:
+ case 0xBA:
+ case 0xBB:
+ case 0xBC:
+ case 0xBD:
+ case 0xBE:
+ case 0xBF:
+ case 0xD9: // str 8
+ case 0xDA: // str 16
+ case 0xDB: // str 32
+ {
+ string_t s;
+ return get_msgpack_string(s) and sax->string(s);
+ }
+
+ case 0xC0: // nil
+ return sax->null();
+
+ case 0xC2: // false
+ return sax->boolean(false);
+
+ case 0xC3: // true
+ return sax->boolean(true);
+
+ case 0xC4: // bin 8
+ case 0xC5: // bin 16
+ case 0xC6: // bin 32
+ case 0xC7: // ext 8
+ case 0xC8: // ext 16
+ case 0xC9: // ext 32
+ case 0xD4: // fixext 1
+ case 0xD5: // fixext 2
+ case 0xD6: // fixext 4
+ case 0xD7: // fixext 8
+ case 0xD8: // fixext 16
+ {
+ binary_t b;
+ return get_msgpack_binary(b) and sax->binary(b);
+ }
+
+ case 0xCA: // float 32
+ {
+ float number;
+ return get_number(input_format_t::msgpack, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ case 0xCB: // float 64
+ {
+ double number;
+ return get_number(input_format_t::msgpack, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ case 0xCC: // uint 8
+ {
+ std::uint8_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
+ }
+
+ case 0xCD: // uint 16
+ {
+ std::uint16_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
+ }
+
+ case 0xCE: // uint 32
+ {
+ std::uint32_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
+ }
+
+ case 0xCF: // uint 64
+ {
+ std::uint64_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_unsigned(number);
+ }
+
+ case 0xD0: // int 8
+ {
+ std::int8_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
+ }
+
+ case 0xD1: // int 16
+ {
+ std::int16_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
+ }
+
+ case 0xD2: // int 32
+ {
+ std::int32_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
+ }
+
+ case 0xD3: // int 64
+ {
+ std::int64_t number;
+ return get_number(input_format_t::msgpack, number) and sax->number_integer(number);
+ }
+
+ case 0xDC: // array 16
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::msgpack, len) and get_msgpack_array(static_cast<std::size_t>(len));
+ }
+
+ case 0xDD: // array 32
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::msgpack, len) and get_msgpack_array(static_cast<std::size_t>(len));
+ }
+
+ case 0xDE: // map 16
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::msgpack, len) and get_msgpack_object(static_cast<std::size_t>(len));
+ }
+
+ case 0xDF: // map 32
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::msgpack, len) and get_msgpack_object(static_cast<std::size_t>(len));
+ }
+
+ // negative fixint
+ case 0xE0:
+ case 0xE1:
+ case 0xE2:
+ case 0xE3:
+ case 0xE4:
+ case 0xE5:
+ case 0xE6:
+ case 0xE7:
+ case 0xE8:
+ case 0xE9:
+ case 0xEA:
+ case 0xEB:
+ case 0xEC:
+ case 0xED:
+ case 0xEE:
+ case 0xEF:
+ case 0xF0:
+ case 0xF1:
+ case 0xF2:
+ case 0xF3:
+ case 0xF4:
+ case 0xF5:
+ case 0xF6:
+ case 0xF7:
+ case 0xF8:
+ case 0xF9:
+ case 0xFA:
+ case 0xFB:
+ case 0xFC:
+ case 0xFD:
+ case 0xFE:
+ case 0xFF:
+ return sax->number_integer(static_cast<std::int8_t>(current));
+
+ default: // anything else
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::msgpack, "invalid byte: 0x" + last_token, "value")));
+ }
+ }
+ }
+
+ /*!
+ @brief reads a MessagePack string
+
+ This function first reads starting bytes to determine the expected
+ string length and then copies this number of bytes into a string.
+
+ @param[out] result created string
+
+ @return whether string creation completed
+ */
+ bool get_msgpack_string(string_t& result)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::msgpack, "string")))
+ {
+ return false;
+ }
+
+ switch (current)
+ {
+ // fixstr
+ case 0xA0:
+ case 0xA1:
+ case 0xA2:
+ case 0xA3:
+ case 0xA4:
+ case 0xA5:
+ case 0xA6:
+ case 0xA7:
+ case 0xA8:
+ case 0xA9:
+ case 0xAA:
+ case 0xAB:
+ case 0xAC:
+ case 0xAD:
+ case 0xAE:
+ case 0xAF:
+ case 0xB0:
+ case 0xB1:
+ case 0xB2:
+ case 0xB3:
+ case 0xB4:
+ case 0xB5:
+ case 0xB6:
+ case 0xB7:
+ case 0xB8:
+ case 0xB9:
+ case 0xBA:
+ case 0xBB:
+ case 0xBC:
+ case 0xBD:
+ case 0xBE:
+ case 0xBF:
+ {
+ return get_string(input_format_t::msgpack, static_cast<unsigned int>(current) & 0x1Fu, result);
+ }
+
+ case 0xD9: // str 8
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::msgpack, len) and get_string(input_format_t::msgpack, len, result);
+ }
+
+ case 0xDA: // str 16
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::msgpack, len) and get_string(input_format_t::msgpack, len, result);
+ }
+
+ case 0xDB: // str 32
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::msgpack, len) and get_string(input_format_t::msgpack, len, result);
+ }
+
+ default:
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::msgpack, "expected length specification (0xA0-0xBF, 0xD9-0xDB); last byte: 0x" + last_token, "string")));
+ }
+ }
+ }
+
+ /*!
+ @brief reads a MessagePack byte array
+
+ This function first reads starting bytes to determine the expected
+ byte array length and then copies this number of bytes into a byte array.
+
+ @param[out] result created byte array
+
+ @return whether byte array creation completed
+ */
+ bool get_msgpack_binary(binary_t& result)
+ {
+ // helper function to set the subtype
+ auto assign_and_return_true = [&result](std::int8_t subtype)
+ {
+ result.set_subtype(static_cast<std::uint8_t>(subtype));
+ return true;
+ };
+
+ switch (current)
+ {
+ case 0xC4: // bin 8
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::msgpack, len) and
+ get_binary(input_format_t::msgpack, len, result);
+ }
+
+ case 0xC5: // bin 16
+ {
+ std::uint16_t len;
+ return get_number(input_format_t::msgpack, len) and
+ get_binary(input_format_t::msgpack, len, result);
+ }
+
+ case 0xC6: // bin 32
+ {
+ std::uint32_t len;
+ return get_number(input_format_t::msgpack, len) and
+ get_binary(input_format_t::msgpack, len, result);
+ }
+
+ case 0xC7: // ext 8
+ {
+ std::uint8_t len;
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, len) and
+ get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, len, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xC8: // ext 16
+ {
+ std::uint16_t len;
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, len) and
+ get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, len, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xC9: // ext 32
+ {
+ std::uint32_t len;
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, len) and
+ get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, len, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xD4: // fixext 1
+ {
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, 1, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xD5: // fixext 2
+ {
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, 2, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xD6: // fixext 4
+ {
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, 4, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xD7: // fixext 8
+ {
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, 8, result) and
+ assign_and_return_true(subtype);
+ }
+
+ case 0xD8: // fixext 16
+ {
+ std::int8_t subtype;
+ return get_number(input_format_t::msgpack, subtype) and
+ get_binary(input_format_t::msgpack, 16, result) and
+ assign_and_return_true(subtype);
+ }
+
+ default: // LCOV_EXCL_LINE
+ return false; // LCOV_EXCL_LINE
+ }
+ }
+
+ /*!
+ @param[in] len the length of the array
+ @return whether array creation completed
+ */
+ bool get_msgpack_array(const std::size_t len)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_array(len)))
+ {
+ return false;
+ }
+
+ for (std::size_t i = 0; i < len; ++i)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not parse_msgpack_internal()))
+ {
+ return false;
+ }
+ }
+
+ return sax->end_array();
+ }
+
+ /*!
+ @param[in] len the length of the object
+ @return whether object creation completed
+ */
+ bool get_msgpack_object(const std::size_t len)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_object(len)))
+ {
+ return false;
+ }
+
+ string_t key;
+ for (std::size_t i = 0; i < len; ++i)
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not get_msgpack_string(key) or not sax->key(key)))
+ {
+ return false;
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not parse_msgpack_internal()))
+ {
+ return false;
+ }
+ key.clear();
+ }
+
+ return sax->end_object();
+ }
+
+ ////////////
+ // UBJSON //
+ ////////////
+
+ /*!
+ @param[in] get_char whether a new character should be retrieved from the
+ input (true, default) or whether the last read
+ character should be considered instead
+
+ @return whether a valid UBJSON value was passed to the SAX parser
+ */
+ bool parse_ubjson_internal(const bool get_char = true)
+ {
+ return get_ubjson_value(get_char ? get_ignore_noop() : current);
+ }
+
+ /*!
+ @brief reads a UBJSON string
+
+ This function is either called after reading the 'S' byte explicitly
+ indicating a string, or in case of an object key where the 'S' byte can be
+ left out.
+
+ @param[out] result created string
+ @param[in] get_char whether a new character should be retrieved from the
+ input (true, default) or whether the last read
+ character should be considered instead
+
+ @return whether string creation completed
+ */
+ bool get_ubjson_string(string_t& result, const bool get_char = true)
+ {
+ if (get_char)
+ {
+ get(); // TODO(niels): may we ignore N here?
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "value")))
+ {
+ return false;
+ }
+
+ switch (current)
+ {
+ case 'U':
+ {
+ std::uint8_t len;
+ return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
+ }
+
+ case 'i':
+ {
+ std::int8_t len;
+ return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
+ }
+
+ case 'I':
+ {
+ std::int16_t len;
+ return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
+ }
+
+ case 'l':
+ {
+ std::int32_t len;
+ return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
+ }
+
+ case 'L':
+ {
+ std::int64_t len;
+ return get_number(input_format_t::ubjson, len) and get_string(input_format_t::ubjson, len, result);
+ }
+
+ default:
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "expected length type specification (U, i, I, l, L); last byte: 0x" + last_token, "string")));
+ }
+ }
+
+ /*!
+ @param[out] result determined size
+ @return whether size determination completed
+ */
+ bool get_ubjson_size_value(std::size_t& result)
+ {
+ switch (get_ignore_noop())
+ {
+ case 'U':
+ {
+ std::uint8_t number;
+ if (JSON_HEDLEY_UNLIKELY(not get_number(input_format_t::ubjson, number)))
+ {
+ return false;
+ }
+ result = static_cast<std::size_t>(number);
+ return true;
+ }
+
+ case 'i':
+ {
+ std::int8_t number;
+ if (JSON_HEDLEY_UNLIKELY(not get_number(input_format_t::ubjson, number)))
+ {
+ return false;
+ }
+ result = static_cast<std::size_t>(number);
+ return true;
+ }
+
+ case 'I':
+ {
+ std::int16_t number;
+ if (JSON_HEDLEY_UNLIKELY(not get_number(input_format_t::ubjson, number)))
+ {
+ return false;
+ }
+ result = static_cast<std::size_t>(number);
+ return true;
+ }
+
+ case 'l':
+ {
+ std::int32_t number;
+ if (JSON_HEDLEY_UNLIKELY(not get_number(input_format_t::ubjson, number)))
+ {
+ return false;
+ }
+ result = static_cast<std::size_t>(number);
+ return true;
+ }
+
+ case 'L':
+ {
+ std::int64_t number;
+ if (JSON_HEDLEY_UNLIKELY(not get_number(input_format_t::ubjson, number)))
+ {
+ return false;
+ }
+ result = static_cast<std::size_t>(number);
+ return true;
+ }
+
+ default:
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "expected length type specification (U, i, I, l, L) after '#'; last byte: 0x" + last_token, "size")));
+ }
+ }
+ }
+
+ /*!
+ @brief determine the type and size for a container
+
+ In the optimized UBJSON format, a type and a size can be provided to allow
+ for a more compact representation.
+
+ @param[out] result pair of the size and the type
+
+ @return whether pair creation completed
+ */
+ bool get_ubjson_size_type(std::pair<std::size_t, char_int_type>& result)
+ {
+ result.first = string_t::npos; // size
+ result.second = 0; // type
+
+ get_ignore_noop();
+
+ if (current == '$')
+ {
+ result.second = get(); // must not ignore 'N', because 'N' maybe the type
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "type")))
+ {
+ return false;
+ }
+
+ get_ignore_noop();
+ if (JSON_HEDLEY_UNLIKELY(current != '#'))
+ {
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "value")))
+ {
+ return false;
+ }
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::ubjson, "expected '#' after type information; last byte: 0x" + last_token, "size")));
+ }
+
+ return get_ubjson_size_value(result.first);
+ }
+
+ if (current == '#')
+ {
+ return get_ubjson_size_value(result.first);
+ }
+
+ return true;
+ }
+
+ /*!
+ @param prefix the previously read or set type prefix
+ @return whether value creation completed
+ */
+ bool get_ubjson_value(const char_int_type prefix)
+ {
+ switch (prefix)
+ {
+ case std::char_traits<char_type>::eof(): // EOF
+ return unexpect_eof(input_format_t::ubjson, "value");
+
+ case 'T': // true
+ return sax->boolean(true);
+ case 'F': // false
+ return sax->boolean(false);
+
+ case 'Z': // null
+ return sax->null();
+
+ case 'U':
+ {
+ std::uint8_t number;
+ return get_number(input_format_t::ubjson, number) and sax->number_unsigned(number);
+ }
+
+ case 'i':
+ {
+ std::int8_t number;
+ return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
+ }
+
+ case 'I':
+ {
+ std::int16_t number;
+ return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
+ }
+
+ case 'l':
+ {
+ std::int32_t number;
+ return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
+ }
+
+ case 'L':
+ {
+ std::int64_t number;
+ return get_number(input_format_t::ubjson, number) and sax->number_integer(number);
+ }
+
+ case 'd':
+ {
+ float number;
+ return get_number(input_format_t::ubjson, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ case 'D':
+ {
+ double number;
+ return get_number(input_format_t::ubjson, number) and sax->number_float(static_cast<number_float_t>(number), "");
+ }
+
+ case 'C': // char
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(input_format_t::ubjson, "char")))
+ {
+ return false;
+ }
+ if (JSON_HEDLEY_UNLIKELY(current > 127))
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(113, chars_read, exception_message(input_format_t::ubjson, "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + last_token, "char")));
+ }
+ string_t s(1, static_cast<typename string_t::value_type>(current));
+ return sax->string(s);
+ }
+
+ case 'S': // string
+ {
+ string_t s;
+ return get_ubjson_string(s) and sax->string(s);
+ }
+
+ case '[': // array
+ return get_ubjson_array();
+
+ case '{': // object
+ return get_ubjson_object();
+
+ default: // anything else
+ {
+ auto last_token = get_token_string();
+ return sax->parse_error(chars_read, last_token, parse_error::create(112, chars_read, exception_message(input_format_t::ubjson, "invalid byte: 0x" + last_token, "value")));
+ }
+ }
+ }
+
+ /*!
+ @return whether array creation completed
+ */
+ bool get_ubjson_array()
+ {
+ std::pair<std::size_t, char_int_type> size_and_type;
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_size_type(size_and_type)))
+ {
+ return false;
+ }
+
+ if (size_and_type.first != string_t::npos)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_array(size_and_type.first)))
+ {
+ return false;
+ }
+
+ if (size_and_type.second != 0)
+ {
+ if (size_and_type.second != 'N')
+ {
+ for (std::size_t i = 0; i < size_and_type.first; ++i)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_value(size_and_type.second)))
+ {
+ return false;
+ }
+ }
+ }
+ }
+ else
+ {
+ for (std::size_t i = 0; i < size_and_type.first; ++i)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not parse_ubjson_internal()))
+ {
+ return false;
+ }
+ }
+ }
+ }
+ else
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_array(std::size_t(-1))))
+ {
+ return false;
+ }
+
+ while (current != ']')
+ {
+ if (JSON_HEDLEY_UNLIKELY(not parse_ubjson_internal(false)))
+ {
+ return false;
+ }
+ get_ignore_noop();
+ }
+ }
+
+ return sax->end_array();
+ }
+
+ /*!
+ @return whether object creation completed
+ */
+ bool get_ubjson_object()
+ {
+ std::pair<std::size_t, char_int_type> size_and_type;
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_size_type(size_and_type)))
+ {
+ return false;
+ }
+
+ string_t key;
+ if (size_and_type.first != string_t::npos)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_object(size_and_type.first)))
+ {
+ return false;
+ }
+
+ if (size_and_type.second != 0)
+ {
+ for (std::size_t i = 0; i < size_and_type.first; ++i)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_string(key) or not sax->key(key)))
+ {
+ return false;
+ }
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_value(size_and_type.second)))
+ {
+ return false;
+ }
+ key.clear();
+ }
+ }
+ else
+ {
+ for (std::size_t i = 0; i < size_and_type.first; ++i)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_string(key) or not sax->key(key)))
+ {
+ return false;
+ }
+ if (JSON_HEDLEY_UNLIKELY(not parse_ubjson_internal()))
+ {
+ return false;
+ }
+ key.clear();
+ }
+ }
+ }
+ else
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_object(std::size_t(-1))))
+ {
+ return false;
+ }
+
+ while (current != '}')
+ {
+ if (JSON_HEDLEY_UNLIKELY(not get_ubjson_string(key, false) or not sax->key(key)))
+ {
+ return false;
+ }
+ if (JSON_HEDLEY_UNLIKELY(not parse_ubjson_internal()))
+ {
+ return false;
+ }
+ get_ignore_noop();
+ key.clear();
+ }
+ }
+
+ return sax->end_object();
+ }
+
+ // Note, no reader for UBJSON binary types is implemented because they do
+ // not exist
+
+ ///////////////////////
+ // Utility functions //
+ ///////////////////////
+
+ /*!
+ @brief get next character from the input
+
+ This function provides the interface to the used input adapter. It does
+ not throw in case the input reached EOF, but returns a -'ve valued
+ `std::char_traits<char_type>::eof()` in that case.
+
+ @return character read from the input
+ */
+ char_int_type get()
+ {
+ ++chars_read;
+ return current = ia.get_character();
+ }
+
+ /*!
+ @return character read from the input after ignoring all 'N' entries
+ */
+ char_int_type get_ignore_noop()
+ {
+ do
+ {
+ get();
+ }
+ while (current == 'N');
+
+ return current;
+ }
+
+ /*
+ @brief read a number from the input
+
+ @tparam NumberType the type of the number
+ @param[in] format the current format (for diagnostics)
+ @param[out] result number of type @a NumberType
+
+ @return whether conversion completed
+
+ @note This function needs to respect the system's endianess, because
+ bytes in CBOR, MessagePack, and UBJSON are stored in network order
+ (big endian) and therefore need reordering on little endian systems.
+ */
+ template<typename NumberType, bool InputIsLittleEndian = false>
+ bool get_number(const input_format_t format, NumberType& result)
+ {
+ // step 1: read input into array with system's byte order
+ std::array<std::uint8_t, sizeof(NumberType)> vec;
+ for (std::size_t i = 0; i < sizeof(NumberType); ++i)
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(format, "number")))
+ {
+ return false;
+ }
+
+ // reverse byte order prior to conversion if necessary
+ if (is_little_endian != InputIsLittleEndian)
+ {
+ vec[sizeof(NumberType) - i - 1] = static_cast<std::uint8_t>(current);
+ }
+ else
+ {
+ vec[i] = static_cast<std::uint8_t>(current); // LCOV_EXCL_LINE
+ }
+ }
+
+ // step 2: convert array into number of type T and return
+ std::memcpy(&result, vec.data(), sizeof(NumberType));
+ return true;
+ }
+
+ /*!
+ @brief create a string by reading characters from the input
+
+ @tparam NumberType the type of the number
+ @param[in] format the current format (for diagnostics)
+ @param[in] len number of characters to read
+ @param[out] result string created by reading @a len bytes
+
+ @return whether string creation completed
+
+ @note We can not reserve @a len bytes for the result, because @a len
+ may be too large. Usually, @ref unexpect_eof() detects the end of
+ the input before we run out of string memory.
+ */
+ template<typename NumberType>
+ bool get_string(const input_format_t format,
+ const NumberType len,
+ string_t& result)
+ {
+ bool success = true;
+ std::generate_n(std::back_inserter(result), len, [this, &success, &format]()
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(format, "string")))
+ {
+ success = false;
+ }
+ return std::char_traits<char_type>::to_char_type(current);
+ });
+ return success;
+ }
+
+ /*!
+ @brief create a byte array by reading bytes from the input
+
+ @tparam NumberType the type of the number
+ @param[in] format the current format (for diagnostics)
+ @param[in] len number of bytes to read
+ @param[out] result byte array created by reading @a len bytes
+
+ @return whether byte array creation completed
+
+ @note We can not reserve @a len bytes for the result, because @a len
+ may be too large. Usually, @ref unexpect_eof() detects the end of
+ the input before we run out of memory.
+ */
+ template<typename NumberType>
+ bool get_binary(const input_format_t format,
+ const NumberType len,
+ binary_t& result)
+ {
+ bool success = true;
+ std::generate_n(std::back_inserter(result), len, [this, &success, &format]()
+ {
+ get();
+ if (JSON_HEDLEY_UNLIKELY(not unexpect_eof(format, "binary")))
+ {
+ success = false;
+ }
+ return static_cast<std::uint8_t>(current);
+ });
+ return success;
+ }
+
+ /*!
+ @param[in] format the current format (for diagnostics)
+ @param[in] context further context information (for diagnostics)
+ @return whether the last read character is not EOF
+ */
+ JSON_HEDLEY_NON_NULL(3)
+ bool unexpect_eof(const input_format_t format, const char* context) const
+ {
+ if (JSON_HEDLEY_UNLIKELY(current == std::char_traits<char_type>::eof()))
+ {
+ return sax->parse_error(chars_read, "<end of file>",
+ parse_error::create(110, chars_read, exception_message(format, "unexpected end of input", context)));
+ }
+ return true;
+ }
+
+ /*!
+ @return a string representation of the last read byte
+ */
+ std::string get_token_string() const
+ {
+ std::array<char, 3> cr{{}};
+ (std::snprintf)(cr.data(), cr.size(), "%.2hhX", static_cast<unsigned char>(current));
+ return std::string{cr.data()};
+ }
+
+ /*!
+ @param[in] format the current format
+ @param[in] detail a detailed error message
+ @param[in] context further context information
+ @return a message string to use in the parse_error exceptions
+ */
+ std::string exception_message(const input_format_t format,
+ const std::string& detail,
+ const std::string& context) const
+ {
+ std::string error_msg = "syntax error while parsing ";
+
+ switch (format)
+ {
+ case input_format_t::cbor:
+ error_msg += "CBOR";
+ break;
+
+ case input_format_t::msgpack:
+ error_msg += "MessagePack";
+ break;
+
+ case input_format_t::ubjson:
+ error_msg += "UBJSON";
+ break;
+
+ case input_format_t::bson:
+ error_msg += "BSON";
+ break;
+
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
+ }
+
+ return error_msg + " " + context + ": " + detail;
+ }
+
+ private:
+ /// input adapter
+ InputAdapterType ia;
+
+ /// the current character
+ char_int_type current = std::char_traits<char_type>::eof();
+
+ /// the number of characters read
+ std::size_t chars_read = 0;
+
+ /// whether we can assume little endianess
+ const bool is_little_endian = little_endianess();
+
+ /// the SAX parser
+ json_sax_t* sax = nullptr;
+};
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+// #include <nlohmann/detail/input/lexer.hpp>
+
+
+#include <array> // array
+#include <clocale> // localeconv
+#include <cstddef> // size_t
+#include <cstdio> // snprintf
+#include <cstdlib> // strtof, strtod, strtold, strtoll, strtoull
+#include <initializer_list> // initializer_list
+#include <string> // char_traits, string
+#include <utility> // move
+#include <vector> // vector
+
+// #include <nlohmann/detail/input/input_adapters.hpp>
+
+// #include <nlohmann/detail/input/position_t.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
+{
+///////////
+// lexer //
+///////////
+
+template<typename BasicJsonType>
+class lexer_base
+{
+ public:
+ /// token types for the parser
+ enum class token_type
+ {
+ uninitialized, ///< indicating the scanner is uninitialized
+ literal_true, ///< the `true` literal
+ literal_false, ///< the `false` literal
+ literal_null, ///< the `null` literal
+ value_string, ///< a string -- use get_string() for actual value
+ value_unsigned, ///< an unsigned integer -- use get_number_unsigned() for actual value
+ value_integer, ///< a signed integer -- use get_number_integer() for actual value
+ value_float, ///< an floating point number -- use get_number_float() for actual value
+ begin_array, ///< the character for array begin `[`
+ begin_object, ///< the character for object begin `{`
+ end_array, ///< the character for array end `]`
+ end_object, ///< the character for object end `}`
+ name_separator, ///< the name separator `:`
+ value_separator, ///< the value separator `,`
+ parse_error, ///< indicating a parse error
+ end_of_input, ///< indicating the end of the input buffer
+ literal_or_value ///< a literal or the begin of a value (only for diagnostics)
+ };
+
+ /// return name of values of type token_type (only used for errors)
+ JSON_HEDLEY_RETURNS_NON_NULL
+ JSON_HEDLEY_CONST
+ static const char* token_type_name(const token_type t) noexcept
+ {
+ switch (t)
+ {
+ case token_type::uninitialized:
+ return "<uninitialized>";
+ case token_type::literal_true:
+ return "true literal";
+ case token_type::literal_false:
+ return "false literal";
+ case token_type::literal_null:
+ return "null literal";
+ case token_type::value_string:
+ return "string literal";
+ case token_type::value_unsigned:
+ case token_type::value_integer:
+ case token_type::value_float:
+ return "number literal";
+ case token_type::begin_array:
+ return "'['";
+ case token_type::begin_object:
+ return "'{'";
+ case token_type::end_array:
+ return "']'";
+ case token_type::end_object:
+ return "'}'";
+ case token_type::name_separator:
+ return "':'";
+ case token_type::value_separator:
+ return "','";
+ case token_type::parse_error:
+ return "<parse error>";
+ case token_type::end_of_input:
+ return "end of input";
+ case token_type::literal_or_value:
+ return "'[', '{', or a literal";
+ // LCOV_EXCL_START
+ default: // catch non-enum values
+ return "unknown token";
+ // LCOV_EXCL_STOP
+ }
+ }
+};
+/*!
+@brief lexical analysis
+
+This class organizes the lexical analysis during JSON deserialization.
+*/
+template<typename BasicJsonType, typename InputAdapterType>
+class lexer : public lexer_base<BasicJsonType>
+{
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using string_t = typename BasicJsonType::string_t;
+ using char_type = typename InputAdapterType::char_type;
+ using char_int_type = typename std::char_traits<char_type>::int_type;
+
+ public:
+ using token_type = typename lexer_base<BasicJsonType>::token_type;
+
+ explicit lexer(InputAdapterType&& adapter)
+ : ia(std::move(adapter)), decimal_point_char(static_cast<char_int_type>(get_decimal_point())) {}
+
+ // delete because of pointer members
+ lexer(const lexer&) = delete;
+ lexer(lexer&&) = default;
+ lexer& operator=(lexer&) = delete;
+ lexer& operator=(lexer&&) = default;
+ ~lexer() = default;
+
+ private:
+ /////////////////////
+ // locales
+ /////////////////////
+
+ /// return the locale-dependent decimal point
+ JSON_HEDLEY_PURE
+ static char get_decimal_point() noexcept
+ {
+ const auto loc = localeconv();
+ assert(loc != nullptr);
+ return (loc->decimal_point == nullptr) ? '.' : *(loc->decimal_point);
+ }
+
+ /////////////////////
+ // scan functions
+ /////////////////////
+
+ /*!
+ @brief get codepoint from 4 hex characters following `\u`
+
+ For input "\u c1 c2 c3 c4" the codepoint is:
+ (c1 * 0x1000) + (c2 * 0x0100) + (c3 * 0x0010) + c4
+ = (c1 << 12) + (c2 << 8) + (c3 << 4) + (c4 << 0)
+
+ Furthermore, the possible characters '0'..'9', 'A'..'F', and 'a'..'f'
+ must be converted to the integers 0x0..0x9, 0xA..0xF, 0xA..0xF, resp. The
+ conversion is done by subtracting the offset (0x30, 0x37, and 0x57)
+ between the ASCII value of the character and the desired integer value.
+
+ @return codepoint (0x0000..0xFFFF) or -1 in case of an error (e.g. EOF or
+ non-hex character)
+ */
+ int get_codepoint()
+ {
+ // this function only makes sense after reading `\u`
+ assert(current == 'u');
+ int codepoint = 0;
+
+ const auto factors = { 12u, 8u, 4u, 0u };
+ for (const auto factor : factors)
+ {
+ get();
+
+ if (current >= '0' and current <= '9')
+ {
+ codepoint += static_cast<int>((static_cast<unsigned int>(current) - 0x30u) << factor);
+ }
+ else if (current >= 'A' and current <= 'F')
+ {
+ codepoint += static_cast<int>((static_cast<unsigned int>(current) - 0x37u) << factor);
+ }
+ else if (current >= 'a' and current <= 'f')
+ {
+ codepoint += static_cast<int>((static_cast<unsigned int>(current) - 0x57u) << factor);
+ }
+ else
+ {
+ return -1;
+ }
+ }
+
+ assert(0x0000 <= codepoint and codepoint <= 0xFFFF);
+ return codepoint;
+ }
+
+ /*!
+ @brief check if the next byte(s) are inside a given range
+
+ Adds the current byte and, for each passed range, reads a new byte and
+ checks if it is inside the range. If a violation was detected, set up an
+ error message and return false. Otherwise, return true.
+
+ @param[in] ranges list of integers; interpreted as list of pairs of
+ inclusive lower and upper bound, respectively
+
+ @pre The passed list @a ranges must have 2, 4, or 6 elements; that is,
+ 1, 2, or 3 pairs. This precondition is enforced by an assertion.
+
+ @return true if and only if no range violation was detected
+ */
+ bool next_byte_in_range(std::initializer_list<char_int_type> ranges)
+ {
+ assert(ranges.size() == 2 or ranges.size() == 4 or ranges.size() == 6);
+ add(current);
+
+ for (auto range = ranges.begin(); range != ranges.end(); ++range)
+ {
+ get();
+ if (JSON_HEDLEY_LIKELY(*range <= current and current <= *(++range)))
+ {
+ add(current);
+ }
+ else
+ {
+ error_message = "invalid string: ill-formed UTF-8 byte";
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ /*!
+ @brief scan a string literal
+
+ This function scans a string according to Sect. 7 of RFC 7159. While
+ scanning, bytes are escaped and copied into buffer token_buffer. Then the
+ function returns successfully, token_buffer is *not* null-terminated (as it
+ may contain \0 bytes), and token_buffer.size() is the number of bytes in the
+ string.
+
+ @return token_type::value_string if string could be successfully scanned,
+ token_type::parse_error otherwise
+
+ @note In case of errors, variable error_message contains a textual
+ description.
+ */
+ token_type scan_string()
+ {
+ // reset token_buffer (ignore opening quote)
+ reset();
+
+ // we entered the function by reading an open quote
+ assert(current == '\"');
+
+ while (true)
+ {
+ // get next character
+ switch (get())
+ {
+ // end of file while parsing string
+ case std::char_traits<char_type>::eof():
+ {
+ error_message = "invalid string: missing closing quote";
+ return token_type::parse_error;
+ }
+
+ // closing quote
+ case '\"':
+ {
+ return token_type::value_string;
+ }
+
+ // escapes
+ case '\\':
+ {
+ switch (get())
+ {
+ // quotation mark
+ case '\"':
+ add('\"');
+ break;
+ // reverse solidus
+ case '\\':
+ add('\\');
+ break;
+ // solidus
+ case '/':
+ add('/');
+ break;
+ // backspace
+ case 'b':
+ add('\b');
+ break;
+ // form feed
+ case 'f':
+ add('\f');
+ break;
+ // line feed
+ case 'n':
+ add('\n');
+ break;
+ // carriage return
+ case 'r':
+ add('\r');
+ break;
+ // tab
+ case 't':
+ add('\t');
+ break;
+
+ // unicode escapes
+ case 'u':
+ {
+ const int codepoint1 = get_codepoint();
+ int codepoint = codepoint1; // start with codepoint1
+
+ if (JSON_HEDLEY_UNLIKELY(codepoint1 == -1))
+ {
+ error_message = "invalid string: '\\u' must be followed by 4 hex digits";
+ return token_type::parse_error;
+ }
+
+ // check if code point is a high surrogate
+ if (0xD800 <= codepoint1 and codepoint1 <= 0xDBFF)
+ {
+ // expect next \uxxxx entry
+ if (JSON_HEDLEY_LIKELY(get() == '\\' and get() == 'u'))
+ {
+ const int codepoint2 = get_codepoint();
+
+ if (JSON_HEDLEY_UNLIKELY(codepoint2 == -1))
+ {
+ error_message = "invalid string: '\\u' must be followed by 4 hex digits";
+ return token_type::parse_error;
+ }
+
+ // check if codepoint2 is a low surrogate
+ if (JSON_HEDLEY_LIKELY(0xDC00 <= codepoint2 and codepoint2 <= 0xDFFF))
+ {
+ // overwrite codepoint
+ codepoint = static_cast<int>(
+ // high surrogate occupies the most significant 22 bits
+ (static_cast<unsigned int>(codepoint1) << 10u)
+ // low surrogate occupies the least significant 15 bits
+ + static_cast<unsigned int>(codepoint2)
+ // there is still the 0xD800, 0xDC00 and 0x10000 noise
+ // in the result so we have to subtract with:
+ // (0xD800 << 10) + DC00 - 0x10000 = 0x35FDC00
+ - 0x35FDC00u);
+ }
+ else
+ {
+ error_message = "invalid string: surrogate U+D800..U+DBFF must be followed by U+DC00..U+DFFF";
+ return token_type::parse_error;
+ }
+ }
+ else
+ {
+ error_message = "invalid string: surrogate U+D800..U+DBFF must be followed by U+DC00..U+DFFF";
+ return token_type::parse_error;
+ }
+ }
+ else
+ {
+ if (JSON_HEDLEY_UNLIKELY(0xDC00 <= codepoint1 and codepoint1 <= 0xDFFF))
+ {
+ error_message = "invalid string: surrogate U+DC00..U+DFFF must follow U+D800..U+DBFF";
+ return token_type::parse_error;
+ }
+ }
// result of the above calculation yields a proper codepoint
assert(0x00 <= codepoint and codepoint <= 0x10FFFF);
@@ -2194,28 +8439,28 @@ class lexer
if (codepoint < 0x80)
{
// 1-byte characters: 0xxxxxxx (ASCII)
- add(codepoint);
+ add(static_cast<char_int_type>(codepoint));
}
else if (codepoint <= 0x7FF)
{
// 2-byte characters: 110xxxxx 10xxxxxx
- add(0xC0 | (codepoint >> 6));
- add(0x80 | (codepoint & 0x3F));
+ add(static_cast<char_int_type>(0xC0u | (static_cast<unsigned int>(codepoint) >> 6u)));
+ add(static_cast<char_int_type>(0x80u | (static_cast<unsigned int>(codepoint) & 0x3Fu)));
}
else if (codepoint <= 0xFFFF)
{
// 3-byte characters: 1110xxxx 10xxxxxx 10xxxxxx
- add(0xE0 | (codepoint >> 12));
- add(0x80 | ((codepoint >> 6) & 0x3F));
- add(0x80 | (codepoint & 0x3F));
+ add(static_cast<char_int_type>(0xE0u | (static_cast<unsigned int>(codepoint) >> 12u)));
+ add(static_cast<char_int_type>(0x80u | ((static_cast<unsigned int>(codepoint) >> 6u) & 0x3Fu)));
+ add(static_cast<char_int_type>(0x80u | (static_cast<unsigned int>(codepoint) & 0x3Fu)));
}
else
{
// 4-byte characters: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
- add(0xF0 | (codepoint >> 18));
- add(0x80 | ((codepoint >> 12) & 0x3F));
- add(0x80 | ((codepoint >> 6) & 0x3F));
- add(0x80 | (codepoint & 0x3F));
+ add(static_cast<char_int_type>(0xF0u | (static_cast<unsigned int>(codepoint) >> 18u)));
+ add(static_cast<char_int_type>(0x80u | ((static_cast<unsigned int>(codepoint) >> 12u) & 0x3Fu)));
+ add(static_cast<char_int_type>(0x80u | ((static_cast<unsigned int>(codepoint) >> 6u) & 0x3Fu)));
+ add(static_cast<char_int_type>(0x80u | (static_cast<unsigned int>(codepoint) & 0x3Fu)));
}
break;
@@ -2232,39 +8477,194 @@ class lexer
// invalid control characters
case 0x00:
+ {
+ error_message = "invalid string: control character U+0000 (NUL) must be escaped to \\u0000";
+ return token_type::parse_error;
+ }
+
case 0x01:
+ {
+ error_message = "invalid string: control character U+0001 (SOH) must be escaped to \\u0001";
+ return token_type::parse_error;
+ }
+
case 0x02:
+ {
+ error_message = "invalid string: control character U+0002 (STX) must be escaped to \\u0002";
+ return token_type::parse_error;
+ }
+
case 0x03:
+ {
+ error_message = "invalid string: control character U+0003 (ETX) must be escaped to \\u0003";
+ return token_type::parse_error;
+ }
+
case 0x04:
+ {
+ error_message = "invalid string: control character U+0004 (EOT) must be escaped to \\u0004";
+ return token_type::parse_error;
+ }
+
case 0x05:
+ {
+ error_message = "invalid string: control character U+0005 (ENQ) must be escaped to \\u0005";
+ return token_type::parse_error;
+ }
+
case 0x06:
+ {
+ error_message = "invalid string: control character U+0006 (ACK) must be escaped to \\u0006";
+ return token_type::parse_error;
+ }
+
case 0x07:
+ {
+ error_message = "invalid string: control character U+0007 (BEL) must be escaped to \\u0007";
+ return token_type::parse_error;
+ }
+
case 0x08:
+ {
+ error_message = "invalid string: control character U+0008 (BS) must be escaped to \\u0008 or \\b";
+ return token_type::parse_error;
+ }
+
case 0x09:
+ {
+ error_message = "invalid string: control character U+0009 (HT) must be escaped to \\u0009 or \\t";
+ return token_type::parse_error;
+ }
+
case 0x0A:
+ {
+ error_message = "invalid string: control character U+000A (LF) must be escaped to \\u000A or \\n";
+ return token_type::parse_error;
+ }
+
case 0x0B:
+ {
+ error_message = "invalid string: control character U+000B (VT) must be escaped to \\u000B";
+ return token_type::parse_error;
+ }
+
case 0x0C:
+ {
+ error_message = "invalid string: control character U+000C (FF) must be escaped to \\u000C or \\f";
+ return token_type::parse_error;
+ }
+
case 0x0D:
+ {
+ error_message = "invalid string: control character U+000D (CR) must be escaped to \\u000D or \\r";
+ return token_type::parse_error;
+ }
+
case 0x0E:
+ {
+ error_message = "invalid string: control character U+000E (SO) must be escaped to \\u000E";
+ return token_type::parse_error;
+ }
+
case 0x0F:
+ {
+ error_message = "invalid string: control character U+000F (SI) must be escaped to \\u000F";
+ return token_type::parse_error;
+ }
+
case 0x10:
+ {
+ error_message = "invalid string: control character U+0010 (DLE) must be escaped to \\u0010";
+ return token_type::parse_error;
+ }
+
case 0x11:
+ {
+ error_message = "invalid string: control character U+0011 (DC1) must be escaped to \\u0011";
+ return token_type::parse_error;
+ }
+
case 0x12:
+ {
+ error_message = "invalid string: control character U+0012 (DC2) must be escaped to \\u0012";
+ return token_type::parse_error;
+ }
+
case 0x13:
+ {
+ error_message = "invalid string: control character U+0013 (DC3) must be escaped to \\u0013";
+ return token_type::parse_error;
+ }
+
case 0x14:
+ {
+ error_message = "invalid string: control character U+0014 (DC4) must be escaped to \\u0014";
+ return token_type::parse_error;
+ }
+
case 0x15:
+ {
+ error_message = "invalid string: control character U+0015 (NAK) must be escaped to \\u0015";
+ return token_type::parse_error;
+ }
+
case 0x16:
+ {
+ error_message = "invalid string: control character U+0016 (SYN) must be escaped to \\u0016";
+ return token_type::parse_error;
+ }
+
case 0x17:
+ {
+ error_message = "invalid string: control character U+0017 (ETB) must be escaped to \\u0017";
+ return token_type::parse_error;
+ }
+
case 0x18:
+ {
+ error_message = "invalid string: control character U+0018 (CAN) must be escaped to \\u0018";
+ return token_type::parse_error;
+ }
+
case 0x19:
+ {
+ error_message = "invalid string: control character U+0019 (EM) must be escaped to \\u0019";
+ return token_type::parse_error;
+ }
+
case 0x1A:
+ {
+ error_message = "invalid string: control character U+001A (SUB) must be escaped to \\u001A";
+ return token_type::parse_error;
+ }
+
case 0x1B:
+ {
+ error_message = "invalid string: control character U+001B (ESC) must be escaped to \\u001B";
+ return token_type::parse_error;
+ }
+
case 0x1C:
+ {
+ error_message = "invalid string: control character U+001C (FS) must be escaped to \\u001C";
+ return token_type::parse_error;
+ }
+
case 0x1D:
+ {
+ error_message = "invalid string: control character U+001D (GS) must be escaped to \\u001D";
+ return token_type::parse_error;
+ }
+
case 0x1E:
+ {
+ error_message = "invalid string: control character U+001E (RS) must be escaped to \\u001E";
+ return token_type::parse_error;
+ }
+
case 0x1F:
{
- error_message = "invalid string: control character must be escaped";
+ error_message = "invalid string: control character U+001F (US) must be escaped to \\u001F";
return token_type::parse_error;
}
@@ -2400,7 +8800,7 @@ class lexer
case 0xDE:
case 0xDF:
{
- if (JSON_UNLIKELY(not next_byte_in_range({0x80, 0xBF})))
+ if (JSON_HEDLEY_UNLIKELY(not next_byte_in_range({0x80, 0xBF})))
{
return token_type::parse_error;
}
@@ -2410,7 +8810,7 @@ class lexer
// U+0800..U+0FFF: bytes E0 A0..BF 80..BF
case 0xE0:
{
- if (JSON_UNLIKELY(not (next_byte_in_range({0xA0, 0xBF, 0x80, 0xBF}))))
+ if (JSON_HEDLEY_UNLIKELY(not (next_byte_in_range({0xA0, 0xBF, 0x80, 0xBF}))))
{
return token_type::parse_error;
}
@@ -2434,7 +8834,7 @@ class lexer
case 0xEE:
case 0xEF:
{
- if (JSON_UNLIKELY(not (next_byte_in_range({0x80, 0xBF, 0x80, 0xBF}))))
+ if (JSON_HEDLEY_UNLIKELY(not (next_byte_in_range({0x80, 0xBF, 0x80, 0xBF}))))
{
return token_type::parse_error;
}
@@ -2444,7 +8844,7 @@ class lexer
// U+D000..U+D7FF: bytes ED 80..9F 80..BF
case 0xED:
{
- if (JSON_UNLIKELY(not (next_byte_in_range({0x80, 0x9F, 0x80, 0xBF}))))
+ if (JSON_HEDLEY_UNLIKELY(not (next_byte_in_range({0x80, 0x9F, 0x80, 0xBF}))))
{
return token_type::parse_error;
}
@@ -2454,7 +8854,7 @@ class lexer
// U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
case 0xF0:
{
- if (JSON_UNLIKELY(not (next_byte_in_range({0x90, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
+ if (JSON_HEDLEY_UNLIKELY(not (next_byte_in_range({0x90, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
{
return token_type::parse_error;
}
@@ -2466,7 +8866,7 @@ class lexer
case 0xF2:
case 0xF3:
{
- if (JSON_UNLIKELY(not (next_byte_in_range({0x80, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
+ if (JSON_HEDLEY_UNLIKELY(not (next_byte_in_range({0x80, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
{
return token_type::parse_error;
}
@@ -2476,7 +8876,7 @@ class lexer
// U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
case 0xF4:
{
- if (JSON_UNLIKELY(not (next_byte_in_range({0x80, 0x8F, 0x80, 0xBF, 0x80, 0xBF}))))
+ if (JSON_HEDLEY_UNLIKELY(not (next_byte_in_range({0x80, 0x8F, 0x80, 0xBF, 0x80, 0xBF}))))
{
return token_type::parse_error;
}
@@ -2493,16 +8893,19 @@ class lexer
}
}
+ JSON_HEDLEY_NON_NULL(2)
static void strtof(float& f, const char* str, char** endptr) noexcept
{
f = std::strtof(str, endptr);
}
+ JSON_HEDLEY_NON_NULL(2)
static void strtof(double& f, const char* str, char** endptr) noexcept
{
f = std::strtod(str, endptr);
}
+ JSON_HEDLEY_NON_NULL(2)
static void strtof(long double& f, const char* str, char** endptr) noexcept
{
f = std::strtold(str, endptr);
@@ -2525,7 +8928,7 @@ class lexer
minus | zero | any1 | [error] | [error] | [error] | [error] | [error]
zero | done | done | exponent | done | done | decimal1 | done
any1 | any1 | any1 | exponent | done | done | decimal1 | done
- decimal1 | decimal2 | [error] | [error] | [error] | [error] | [error] | [error]
+ decimal1 | decimal2 | decimal2 | [error] | [error] | [error] | [error] | [error]
decimal2 | decimal2 | decimal2 | exponent | done | done | done | done
exponent | any2 | any2 | [error] | sign | sign | [error] | [error]
sign | any2 | any2 | [error] | [error] | [error] | [error] | [error]
@@ -2548,7 +8951,7 @@ class lexer
locale's decimal point is used instead of `.` to work with the
locale-dependent converters.
*/
- token_type scan_number()
+ token_type scan_number() // lgtm [cpp/use-of-goto]
{
// reset token_buffer to store the number's bytes
reset();
@@ -2586,11 +8989,9 @@ class lexer
goto scan_number_any1;
}
- default:
- {
- // all other characters are rejected outside scan_number()
- assert(false); // LCOV_EXCL_LINE
- }
+ // all other characters are rejected outside scan_number()
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
}
scan_number_minus:
@@ -2880,13 +9281,14 @@ scan_number_done:
@param[in] length the length of the passed literal text
@param[in] return_type the token type to return on success
*/
- token_type scan_literal(const char* literal_text, const std::size_t length,
+ JSON_HEDLEY_NON_NULL(2)
+ token_type scan_literal(const char_type* literal_text, const std::size_t length,
token_type return_type)
{
- assert(current == literal_text[0]);
+ assert(std::char_traits<char_type>::to_char_type(current) == literal_text[0]);
for (std::size_t i = 1; i < length; ++i)
{
- if (JSON_UNLIKELY(get() != literal_text[i]))
+ if (JSON_HEDLEY_UNLIKELY(std::char_traits<char_type>::to_char_type(get()) != literal_text[i]))
{
error_message = "invalid literal";
return token_type::parse_error;
@@ -2904,7 +9306,7 @@ scan_number_done:
{
token_buffer.clear();
token_string.clear();
- token_string.push_back(std::char_traits<char>::to_char_type(current));
+ token_string.push_back(std::char_traits<char_type>::to_char_type(current));
}
/*
@@ -2917,33 +9319,73 @@ scan_number_done:
@return character read from the input
*/
- std::char_traits<char>::int_type get()
+ char_int_type get()
{
- ++chars_read;
- current = ia->get_character();
- if (JSON_LIKELY(current != std::char_traits<char>::eof()))
+ ++position.chars_read_total;
+ ++position.chars_read_current_line;
+
+ if (next_unget)
+ {
+ // just reset the next_unget variable and work with current
+ next_unget = false;
+ }
+ else
+ {
+ current = ia.get_character();
+ }
+
+ if (JSON_HEDLEY_LIKELY(current != std::char_traits<char_type>::eof()))
{
- token_string.push_back(std::char_traits<char>::to_char_type(current));
+ token_string.push_back(std::char_traits<char_type>::to_char_type(current));
}
+
+ if (current == '\n')
+ {
+ ++position.lines_read;
+ position.chars_read_current_line = 0;
+ }
+
return current;
}
- /// unget current character (return it again on next get)
+ /*!
+ @brief unget current character (read it again on next get)
+
+ We implement unget by setting variable next_unget to true. The input is not
+ changed - we just simulate ungetting by modifying chars_read_total,
+ chars_read_current_line, and token_string. The next call to get() will
+ behave as if the unget character is read again.
+ */
void unget()
{
- --chars_read;
- if (JSON_LIKELY(current != std::char_traits<char>::eof()))
+ next_unget = true;
+
+ --position.chars_read_total;
+
+ // in case we "unget" a newline, we have to also decrement the lines_read
+ if (position.chars_read_current_line == 0)
+ {
+ if (position.lines_read > 0)
+ {
+ --position.lines_read;
+ }
+ }
+ else
+ {
+ --position.chars_read_current_line;
+ }
+
+ if (JSON_HEDLEY_LIKELY(current != std::char_traits<char_type>::eof()))
{
- ia->unget_character();
- assert(token_string.size() != 0);
+ assert(not token_string.empty());
token_string.pop_back();
}
}
/// add a character to token_buffer
- void add(int c)
+ void add(char_int_type c)
{
- token_buffer.push_back(std::char_traits<char>::to_char_type(c));
+ token_buffer.push_back(static_cast<typename string_t::value_type>(c));
}
public:
@@ -2970,9 +9412,9 @@ scan_number_done:
}
/// return current string value (implicitly resets the token; useful only once)
- string_t&& move_string()
+ string_t& get_string()
{
- return std::move(token_buffer);
+ return token_buffer;
}
/////////////////////
@@ -2980,9 +9422,9 @@ scan_number_done:
/////////////////////
/// return position of last read token
- constexpr std::size_t get_position() const noexcept
+ constexpr position_t get_position() const noexcept
{
- return chars_read;
+ return position;
}
/// return the last read token (for errors only). Will never contain EOF
@@ -2994,18 +9436,17 @@ scan_number_done:
std::string result;
for (const auto c : token_string)
{
- if ('\x00' <= c and c <= '\x1F')
+ if (static_cast<unsigned char>(c) <= '\x1F')
{
// escape control characters
- std::stringstream ss;
- ss << "<U+" << std::setw(4) << std::uppercase << std::setfill('0')
- << std::hex << static_cast<int>(c) << ">";
- result += ss.str();
+ std::array<char, 9> cs{{}};
+ (std::snprintf)(cs.data(), cs.size(), "<U+%.4X>", static_cast<unsigned char>(c));
+ result += cs.data();
}
else
{
// add character as is
- result.push_back(c);
+ result.push_back(static_cast<std::string::value_type>(c));
}
}
@@ -3013,6 +9454,7 @@ scan_number_done:
}
/// return syntax error message
+ JSON_HEDLEY_RETURNS_NON_NULL
constexpr const char* get_error_message() const noexcept
{
return error_message;
@@ -3022,8 +9464,33 @@ scan_number_done:
// actual scanner
/////////////////////
+ /*!
+ @brief skip the UTF-8 byte order mark
+ @return true iff there is no BOM or the correct BOM has been skipped
+ */
+ bool skip_bom()
+ {
+ if (get() == 0xEF)
+ {
+ // check if we completely parse the BOM
+ return get() == 0xBB and get() == 0xBF;
+ }
+
+ // the first character is not the beginning of the BOM; unget it to
+ // process is later
+ unget();
+ return true;
+ }
+
token_type scan()
{
+ // initially, skip the BOM
+ if (position.chars_read_total == 0 and not skip_bom())
+ {
+ error_message = "invalid BOM; must be 0xEF 0xBB 0xBF if given";
+ return token_type::parse_error;
+ }
+
// read next character and ignore whitespace
do
{
@@ -3049,11 +9516,20 @@ scan_number_done:
// literals
case 't':
- return scan_literal("true", 4, token_type::literal_true);
+ {
+ std::array<char_type, 4> true_literal = {{'t', 'r', 'u', 'e'}};
+ return scan_literal(true_literal.data(), true_literal.size(), token_type::literal_true);
+ }
case 'f':
- return scan_literal("false", 5, token_type::literal_false);
+ {
+ std::array<char_type, 5> false_literal = {{'f', 'a', 'l', 's', 'e'}};
+ return scan_literal(false_literal.data(), false_literal.size(), token_type::literal_false);
+ }
case 'n':
- return scan_literal("null", 4, token_type::literal_null);
+ {
+ std::array<char_type, 4> null_literal = {{'n', 'u', 'l', 'l'}};
+ return scan_literal(null_literal.data(), null_literal.size(), token_type::literal_null);
+ }
// string
case '\"':
@@ -3076,7 +9552,7 @@ scan_number_done:
// end of input (the null byte is needed when parsing from
// string literals)
case '\0':
- case std::char_traits<char>::eof():
+ case std::char_traits<char_type>::eof():
return token_type::end_of_input;
// error
@@ -3088,16 +9564,19 @@ scan_number_done:
private:
/// input adapter
- detail::input_adapter_t ia = nullptr;
+ InputAdapterType ia;
/// the current character
- std::char_traits<char>::int_type current = std::char_traits<char>::eof();
+ char_int_type current = std::char_traits<char_type>::eof();
- /// the number of characters read
- std::size_t chars_read = 0;
+ /// whether the next get() call should just return current
+ bool next_unget = false;
+
+ /// the start position of the current token
+ position_t position {};
/// raw input token string (for error messages)
- std::vector<char> token_string {};
+ std::vector<char_type> token_string {};
/// buffer for variable-length tokens (numbers, strings)
string_t token_buffer {};
@@ -3111,10 +9590,10 @@ scan_number_done:
number_float_t value_float = 0;
/// the decimal point
- const char decimal_point_char = '.';
+ const char_int_type decimal_point_char = '.';
};
-}
-}
+} // namespace detail
+} // namespace nlohmann
// #include <nlohmann/detail/input/parser.hpp>
@@ -3125,15 +9604,20 @@ scan_number_done:
#include <functional> // function
#include <string> // string
#include <utility> // move
+#include <vector> // vector
// #include <nlohmann/detail/exceptions.hpp>
-// #include <nlohmann/detail/macro_scope.hpp>
-
// #include <nlohmann/detail/input/input_adapters.hpp>
+// #include <nlohmann/detail/input/json_sax.hpp>
+
// #include <nlohmann/detail/input/lexer.hpp>
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/meta/is_sax.hpp>
+
// #include <nlohmann/detail/value_t.hpp>
@@ -3145,47 +9629,51 @@ namespace detail
// parser //
////////////
+enum class parse_event_t : uint8_t
+{
+ /// the parser read `{` and started to process a JSON object
+ object_start,
+ /// the parser read `}` and finished processing a JSON object
+ object_end,
+ /// the parser read `[` and started to process a JSON array
+ array_start,
+ /// the parser read `]` and finished processing a JSON array
+ array_end,
+ /// the parser read a key of a value in an object
+ key,
+ /// the parser finished reading a JSON value
+ value
+};
+
+template<typename BasicJsonType>
+using parser_callback_t =
+ std::function<bool(int depth, parse_event_t event, BasicJsonType& parsed)>;
+
/*!
@brief syntax analysis
-This class implements a recursive decent parser.
+This class implements a recursive descent parser.
*/
-template<typename BasicJsonType>
+template<typename BasicJsonType, typename InputAdapterType>
class parser
{
using number_integer_t = typename BasicJsonType::number_integer_t;
using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
using number_float_t = typename BasicJsonType::number_float_t;
using string_t = typename BasicJsonType::string_t;
- using lexer_t = lexer<BasicJsonType>;
+ using lexer_t = lexer<BasicJsonType, InputAdapterType>;
using token_type = typename lexer_t::token_type;
public:
- enum class parse_event_t : uint8_t
- {
- /// the parser read `{` and started to process a JSON object
- object_start,
- /// the parser read `}` and finished processing a JSON object
- object_end,
- /// the parser read `[` and started to process a JSON array
- array_start,
- /// the parser read `]` and finished processing a JSON array
- array_end,
- /// the parser read a key of a value in an object
- key,
- /// the parser finished reading a JSON value
- value
- };
-
- using parser_callback_t =
- std::function<bool(int depth, parse_event_t event, BasicJsonType& parsed)>;
-
/// a parser reading from an input adapter
- explicit parser(detail::input_adapter_t adapter,
- const parser_callback_t cb = nullptr,
+ explicit parser(InputAdapterType&& adapter,
+ const parser_callback_t<BasicJsonType> cb = nullptr,
const bool allow_exceptions_ = true)
- : callback(cb), m_lexer(adapter), allow_exceptions(allow_exceptions_)
- {}
+ : callback(cb), m_lexer(std::move(adapter)), allow_exceptions(allow_exceptions_)
+ {
+ // read first token
+ get_token();
+ }
/*!
@brief public parser interface
@@ -3199,31 +9687,56 @@ class parser
*/
void parse(const bool strict, BasicJsonType& result)
{
- // read first token
- get_token();
+ if (callback)
+ {
+ json_sax_dom_callback_parser<BasicJsonType> sdp(result, callback, allow_exceptions);
+ sax_parse_internal(&sdp);
+ result.assert_invariant();
- parse_internal(true, result);
- result.assert_invariant();
+ // in strict mode, input must be completely read
+ if (strict and (get_token() != token_type::end_of_input))
+ {
+ sdp.parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::end_of_input, "value")));
+ }
- // in strict mode, input must be completely read
- if (strict)
- {
- get_token();
- expect(token_type::end_of_input);
- }
+ // in case of an error, return discarded value
+ if (sdp.is_errored())
+ {
+ result = value_t::discarded;
+ return;
+ }
- // in case of an error, return discarded value
- if (errored)
- {
- result = value_t::discarded;
- return;
+ // set top-level value to null if it was discarded by the callback
+ // function
+ if (result.is_discarded())
+ {
+ result = nullptr;
+ }
}
-
- // set top-level value to null if it was discarded by the callback
- // function
- if (result.is_discarded())
+ else
{
- result = nullptr;
+ json_sax_dom_parser<BasicJsonType> sdp(result, allow_exceptions);
+ sax_parse_internal(&sdp);
+ result.assert_invariant();
+
+ // in strict mode, input must be completely read
+ if (strict and (get_token() != token_type::end_of_input))
+ {
+ sdp.parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::end_of_input, "value")));
+ }
+
+ // in case of an error, return discarded value
+ if (sdp.is_errored())
+ {
+ result = value_t::discarded;
+ return;
+ }
}
}
@@ -3235,448 +9748,330 @@ class parser
*/
bool accept(const bool strict = true)
{
- // read first token
- get_token();
+ json_sax_acceptor<BasicJsonType> sax_acceptor;
+ return sax_parse(&sax_acceptor, strict);
+ }
- if (not accept_internal())
+ template <typename SAX>
+ JSON_HEDLEY_NON_NULL(2)
+ bool sax_parse(SAX* sax, const bool strict = true)
+ {
+ (void)detail::is_sax_static_asserts<SAX, BasicJsonType> {};
+ const bool result = sax_parse_internal(sax);
+
+ // strict mode: next byte must be EOF
+ if (result and strict and (get_token() != token_type::end_of_input))
{
- return false;
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::end_of_input, "value")));
}
- // strict => last token must be EOF
- return not strict or (get_token() == token_type::end_of_input);
+ return result;
}
private:
- /*!
- @brief the actual parser
- @throw parse_error.101 in case of an unexpected token
- @throw parse_error.102 if to_unicode fails or surrogate error
- @throw parse_error.103 if to_unicode fails
- */
- void parse_internal(bool keep, BasicJsonType& result)
+ template <typename SAX>
+ JSON_HEDLEY_NON_NULL(2)
+ bool sax_parse_internal(SAX* sax)
{
- // never parse after a parse error was detected
- assert(not errored);
-
- // start with a discarded value
- if (not result.is_discarded())
- {
- result.m_value.destroy(result.m_type);
- result.m_type = value_t::discarded;
- }
+ // stack to remember the hierarchy of structured values we are parsing
+ // true = array; false = object
+ std::vector<bool> states;
+ // value to avoid a goto (see comment where set to true)
+ bool skip_to_state_evaluation = false;
- switch (last_token)
+ while (true)
{
- case token_type::begin_object:
+ if (not skip_to_state_evaluation)
{
- if (keep)
+ // invariant: get_token() was called before each iteration
+ switch (last_token)
{
- if (callback)
+ case token_type::begin_object:
{
- keep = callback(depth++, parse_event_t::object_start, result);
- }
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_object(std::size_t(-1))))
+ {
+ return false;
+ }
- if (not callback or keep)
- {
- // explicitly set result to object to cope with {}
- result.m_type = value_t::object;
- result.m_value = value_t::object;
- }
- }
+ // closing } -> we are done
+ if (get_token() == token_type::end_object)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not sax->end_object()))
+ {
+ return false;
+ }
+ break;
+ }
- // read next token
- get_token();
+ // parse key
+ if (JSON_HEDLEY_UNLIKELY(last_token != token_type::value_string))
+ {
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::value_string, "object key")));
+ }
+ if (JSON_HEDLEY_UNLIKELY(not sax->key(m_lexer.get_string())))
+ {
+ return false;
+ }
- // closing } -> we are done
- if (last_token == token_type::end_object)
- {
- if (keep and callback and not callback(--depth, parse_event_t::object_end, result))
- {
- result.m_value.destroy(result.m_type);
- result.m_type = value_t::discarded;
- }
- break;
- }
+ // parse separator (:)
+ if (JSON_HEDLEY_UNLIKELY(get_token() != token_type::name_separator))
+ {
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::name_separator, "object separator")));
+ }
- // parse values
- string_t key;
- BasicJsonType value;
- while (true)
- {
- // store key
- if (not expect(token_type::value_string))
- {
- return;
+ // remember we are now inside an object
+ states.push_back(false);
+
+ // parse values
+ get_token();
+ continue;
}
- key = m_lexer.move_string();
- bool keep_tag = false;
- if (keep)
+ case token_type::begin_array:
{
- if (callback)
+ if (JSON_HEDLEY_UNLIKELY(not sax->start_array(std::size_t(-1))))
{
- BasicJsonType k(key);
- keep_tag = callback(depth, parse_event_t::key, k);
+ return false;
}
- else
+
+ // closing ] -> we are done
+ if (get_token() == token_type::end_array)
{
- keep_tag = true;
+ if (JSON_HEDLEY_UNLIKELY(not sax->end_array()))
+ {
+ return false;
+ }
+ break;
}
- }
-
- // parse separator (:)
- get_token();
- if (not expect(token_type::name_separator))
- {
- return;
- }
- // parse and add value
- get_token();
- value.m_value.destroy(value.m_type);
- value.m_type = value_t::discarded;
- parse_internal(keep, value);
+ // remember we are now inside an array
+ states.push_back(true);
- if (JSON_UNLIKELY(errored))
- {
- return;
+ // parse values (no need to call get_token)
+ continue;
}
- if (keep and keep_tag and not value.is_discarded())
+ case token_type::value_float:
{
- result.m_value.object->emplace(std::move(key), std::move(value));
- }
+ const auto res = m_lexer.get_number_float();
- // comma -> next value
- get_token();
- if (last_token == token_type::value_separator)
- {
- get_token();
- continue;
+ if (JSON_HEDLEY_UNLIKELY(not std::isfinite(res)))
+ {
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ out_of_range::create(406, "number overflow parsing '" + m_lexer.get_token_string() + "'"));
+ }
+
+ if (JSON_HEDLEY_UNLIKELY(not sax->number_float(res, m_lexer.get_string())))
+ {
+ return false;
+ }
+
+ break;
}
- // closing }
- if (not expect(token_type::end_object))
+ case token_type::literal_false:
{
- return;
+ if (JSON_HEDLEY_UNLIKELY(not sax->boolean(false)))
+ {
+ return false;
+ }
+ break;
}
- break;
- }
-
- if (keep and callback and not callback(--depth, parse_event_t::object_end, result))
- {
- result.m_value.destroy(result.m_type);
- result.m_type = value_t::discarded;
- }
- break;
- }
- case token_type::begin_array:
- {
- if (keep)
- {
- if (callback)
+ case token_type::literal_null:
{
- keep = callback(depth++, parse_event_t::array_start, result);
+ if (JSON_HEDLEY_UNLIKELY(not sax->null()))
+ {
+ return false;
+ }
+ break;
}
- if (not callback or keep)
+ case token_type::literal_true:
{
- // explicitly set result to array to cope with []
- result.m_type = value_t::array;
- result.m_value = value_t::array;
+ if (JSON_HEDLEY_UNLIKELY(not sax->boolean(true)))
+ {
+ return false;
+ }
+ break;
}
- }
- // read next token
- get_token();
-
- // closing ] -> we are done
- if (last_token == token_type::end_array)
- {
- if (callback and not callback(--depth, parse_event_t::array_end, result))
+ case token_type::value_integer:
{
- result.m_value.destroy(result.m_type);
- result.m_type = value_t::discarded;
+ if (JSON_HEDLEY_UNLIKELY(not sax->number_integer(m_lexer.get_number_integer())))
+ {
+ return false;
+ }
+ break;
}
- break;
- }
-
- // parse values
- BasicJsonType value;
- while (true)
- {
- // parse value
- value.m_value.destroy(value.m_type);
- value.m_type = value_t::discarded;
- parse_internal(keep, value);
- if (JSON_UNLIKELY(errored))
+ case token_type::value_string:
{
- return;
+ if (JSON_HEDLEY_UNLIKELY(not sax->string(m_lexer.get_string())))
+ {
+ return false;
+ }
+ break;
}
- if (keep and not value.is_discarded())
+ case token_type::value_unsigned:
{
- result.m_value.array->push_back(std::move(value));
+ if (JSON_HEDLEY_UNLIKELY(not sax->number_unsigned(m_lexer.get_number_unsigned())))
+ {
+ return false;
+ }
+ break;
}
- // comma -> next value
- get_token();
- if (last_token == token_type::value_separator)
+ case token_type::parse_error:
{
- get_token();
- continue;
+ // using "uninitialized" to avoid "expected" message
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::uninitialized, "value")));
}
- // closing ]
- if (not expect(token_type::end_array))
+ default: // the last token was unexpected
{
- return;
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::literal_or_value, "value")));
}
- break;
- }
-
- if (keep and callback and not callback(--depth, parse_event_t::array_end, result))
- {
- result.m_value.destroy(result.m_type);
- result.m_type = value_t::discarded;
}
- break;
- }
-
- case token_type::literal_null:
- {
- result.m_type = value_t::null;
- break;
- }
-
- case token_type::value_string:
- {
- result.m_type = value_t::string;
- result.m_value = m_lexer.move_string();
- break;
- }
-
- case token_type::literal_true:
- {
- result.m_type = value_t::boolean;
- result.m_value = true;
- break;
- }
-
- case token_type::literal_false:
- {
- result.m_type = value_t::boolean;
- result.m_value = false;
- break;
}
-
- case token_type::value_unsigned:
+ else
{
- result.m_type = value_t::number_unsigned;
- result.m_value = m_lexer.get_number_unsigned();
- break;
+ skip_to_state_evaluation = false;
}
- case token_type::value_integer:
+ // we reached this line after we successfully parsed a value
+ if (states.empty())
{
- result.m_type = value_t::number_integer;
- result.m_value = m_lexer.get_number_integer();
- break;
+ // empty stack: we reached the end of the hierarchy: done
+ return true;
}
- case token_type::value_float:
+ if (states.back()) // array
{
- result.m_type = value_t::number_float;
- result.m_value = m_lexer.get_number_float();
+ // comma -> next value
+ if (get_token() == token_type::value_separator)
+ {
+ // parse a new value
+ get_token();
+ continue;
+ }
- // throw in case of infinity or NAN
- if (JSON_UNLIKELY(not std::isfinite(result.m_value.number_float)))
+ // closing ]
+ if (JSON_HEDLEY_LIKELY(last_token == token_type::end_array))
{
- if (allow_exceptions)
+ if (JSON_HEDLEY_UNLIKELY(not sax->end_array()))
{
- JSON_THROW(out_of_range::create(406, "number overflow parsing '" +
- m_lexer.get_token_string() + "'"));
+ return false;
}
- expect(token_type::uninitialized);
- }
- break;
- }
- case token_type::parse_error:
- {
- // using "uninitialized" to avoid "expected" message
- if (not expect(token_type::uninitialized))
- {
- return;
+ // We are done with this array. Before we can parse a
+ // new value, we need to evaluate the new state first.
+ // By setting skip_to_state_evaluation to false, we
+ // are effectively jumping to the beginning of this if.
+ assert(not states.empty());
+ states.pop_back();
+ skip_to_state_evaluation = true;
+ continue;
}
- break; // LCOV_EXCL_LINE
- }
- default:
- {
- // the last token was unexpected; we expected a value
- if (not expect(token_type::literal_or_value))
- {
- return;
- }
- break; // LCOV_EXCL_LINE
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::end_array, "array")));
}
- }
-
- if (keep and callback and not callback(depth, parse_event_t::value, result))
- {
- result.m_value.destroy(result.m_type);
- result.m_type = value_t::discarded;
- }
- }
-
- /*!
- @brief the actual acceptor
-
- @invariant 1. The last token is not yet processed. Therefore, the caller
- of this function must make sure a token has been read.
- 2. When this function returns, the last token is processed.
- That is, the last read character was already considered.
-
- This invariant makes sure that no token needs to be "unput".
- */
- bool accept_internal()
- {
- switch (last_token)
- {
- case token_type::begin_object:
+ else // object
{
- // read next token
- get_token();
-
- // closing } -> we are done
- if (last_token == token_type::end_object)
- {
- return true;
- }
-
- // parse values
- while (true)
+ // comma -> next value
+ if (get_token() == token_type::value_separator)
{
// parse key
- if (last_token != token_type::value_string)
+ if (JSON_HEDLEY_UNLIKELY(get_token() != token_type::value_string))
{
- return false;
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::value_string, "object key")));
}
- // parse separator (:)
- get_token();
- if (last_token != token_type::name_separator)
+ if (JSON_HEDLEY_UNLIKELY(not sax->key(m_lexer.get_string())))
{
return false;
}
- // parse value
- get_token();
- if (not accept_internal())
+ // parse separator (:)
+ if (JSON_HEDLEY_UNLIKELY(get_token() != token_type::name_separator))
{
- return false;
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::name_separator, "object separator")));
}
- // comma -> next value
+ // parse values
get_token();
- if (last_token == token_type::value_separator)
- {
- get_token();
- continue;
- }
-
- // closing }
- return (last_token == token_type::end_object);
- }
- }
-
- case token_type::begin_array:
- {
- // read next token
- get_token();
-
- // closing ] -> we are done
- if (last_token == token_type::end_array)
- {
- return true;
+ continue;
}
- // parse values
- while (true)
+ // closing }
+ if (JSON_HEDLEY_LIKELY(last_token == token_type::end_object))
{
- // parse value
- if (not accept_internal())
+ if (JSON_HEDLEY_UNLIKELY(not sax->end_object()))
{
return false;
}
- // comma -> next value
- get_token();
- if (last_token == token_type::value_separator)
- {
- get_token();
- continue;
- }
-
- // closing ]
- return (last_token == token_type::end_array);
+ // We are done with this object. Before we can parse a
+ // new value, we need to evaluate the new state first.
+ // By setting skip_to_state_evaluation to false, we
+ // are effectively jumping to the beginning of this if.
+ assert(not states.empty());
+ states.pop_back();
+ skip_to_state_evaluation = true;
+ continue;
}
- }
- case token_type::value_float:
- {
- // reject infinity or NAN
- return std::isfinite(m_lexer.get_number_float());
+ return sax->parse_error(m_lexer.get_position(),
+ m_lexer.get_token_string(),
+ parse_error::create(101, m_lexer.get_position(),
+ exception_message(token_type::end_object, "object")));
}
-
- case token_type::literal_false:
- case token_type::literal_null:
- case token_type::literal_true:
- case token_type::value_integer:
- case token_type::value_string:
- case token_type::value_unsigned:
- return true;
-
- default: // the last token was unexpected
- return false;
}
}
/// get next token from lexer
token_type get_token()
{
- return (last_token = m_lexer.scan());
+ return last_token = m_lexer.scan();
}
- /*!
- @throw parse_error.101 if expected token did not occur
- */
- bool expect(token_type t)
+ std::string exception_message(const token_type expected, const std::string& context)
{
- if (JSON_UNLIKELY(t != last_token))
+ std::string error_msg = "syntax error ";
+
+ if (not context.empty())
{
- errored = true;
- expected = t;
- if (allow_exceptions)
- {
- throw_exception();
- }
- else
- {
- return false;
- }
+ error_msg += "while parsing " + context + " ";
}
- return true;
- }
+ error_msg += "- ";
- [[noreturn]] void throw_exception() const
- {
- std::string error_msg = "syntax error - ";
if (last_token == token_type::parse_error)
{
error_msg += std::string(m_lexer.get_error_message()) + "; last read: '" +
@@ -3692,27 +10087,24 @@ class parser
error_msg += "; expected " + std::string(lexer_t::token_type_name(expected));
}
- JSON_THROW(parse_error::create(101, m_lexer.get_position(), error_msg));
+ return error_msg;
}
private:
- /// current level of recursion
- int depth = 0;
/// callback function
- const parser_callback_t callback = nullptr;
+ const parser_callback_t<BasicJsonType> callback = nullptr;
/// the type of the last read token
token_type last_token = token_type::uninitialized;
/// the lexer
lexer_t m_lexer;
- /// whether a syntax error occurred
- bool errored = false;
- /// possible reason for the syntax error
- token_type expected = token_type::uninitialized;
/// whether to throw exceptions in case of errors
const bool allow_exceptions = true;
};
-}
-}
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/iterators/internal_iterator.hpp>
+
// #include <nlohmann/detail/iterators/primitive_iterator.hpp>
@@ -3804,7 +10196,7 @@ class primitive_iterator_t
primitive_iterator_t const operator++(int) noexcept
{
auto result = *this;
- m_it++;
+ ++m_it;
return result;
}
@@ -3817,7 +10209,7 @@ class primitive_iterator_t
primitive_iterator_t const operator--(int) noexcept
{
auto result = *this;
- m_it--;
+ --m_it;
return result;
}
@@ -3833,13 +10225,8 @@ class primitive_iterator_t
return *this;
}
};
-}
-}
-
-// #include <nlohmann/detail/iterators/internal_iterator.hpp>
-
-
-// #include <nlohmann/detail/iterators/primitive_iterator.hpp>
+} // namespace detail
+} // namespace nlohmann
namespace nlohmann
@@ -3858,19 +10245,22 @@ template<typename BasicJsonType> struct internal_iterator
typename BasicJsonType::object_t::iterator object_iterator {};
/// iterator for JSON arrays
typename BasicJsonType::array_t::iterator array_iterator {};
+ /// iterator for JSON binary arrays
+ typename BasicJsonType::binary_t::container_type::iterator binary_iterator {};
/// generic iterator for all other types
primitive_iterator_t primitive_iterator {};
};
-}
-}
+} // namespace detail
+} // namespace nlohmann
// #include <nlohmann/detail/iterators/iter_impl.hpp>
-#include <ciso646> // not
#include <iterator> // iterator, random_access_iterator_tag, bidirectional_iterator_tag, advance, next
#include <type_traits> // conditional, is_const, remove_const
+// #include <nlohmann/detail/boolean_operators.hpp>
+
// #include <nlohmann/detail/exceptions.hpp>
// #include <nlohmann/detail/iterators/internal_iterator.hpp>
@@ -3879,7 +10269,9 @@ template<typename BasicJsonType> struct internal_iterator
// #include <nlohmann/detail/macro_scope.hpp>
-// #include <nlohmann/detail/meta.hpp>
+// #include <nlohmann/detail/meta/cpp_future.hpp>
+
+// #include <nlohmann/detail/meta/type_traits.hpp>
// #include <nlohmann/detail/value_t.hpp>
@@ -3890,24 +10282,21 @@ namespace detail
{
// forward declare, to be able to friend it later on
template<typename IteratorType> class iteration_proxy;
+template<typename IteratorType> class iteration_proxy_value;
/*!
@brief a template for a bidirectional iterator for the @ref basic_json class
-
This class implements a both iterators (iterator and const_iterator) for the
@ref basic_json class.
-
@note An iterator is called *initialized* when a pointer to a JSON value has
been set (e.g., by a constructor or a copy assignment). If the iterator is
default-constructed, it is *uninitialized* and most methods are undefined.
**The library uses assertions to detect calls on uninitialized iterators.**
-
@requirement The class satisfies the following concept requirements:
-
-[BidirectionalIterator](http://en.cppreference.com/w/cpp/concept/BidirectionalIterator):
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
The iterator that can be moved can be moved in both directions (i.e.
incremented and decremented).
-
@since version 1.0.0, simplified in version 2.0.9, change to bidirectional
iterators in version 3.0.0 (see https://github.com/nlohmann/json/issues/593)
*/
@@ -3918,6 +10307,7 @@ class iter_impl
friend iter_impl<typename std::conditional<std::is_const<BasicJsonType>::value, typename std::remove_const<BasicJsonType>::type, const BasicJsonType>::type>;
friend BasicJsonType;
friend iteration_proxy<iter_impl>;
+ friend iteration_proxy_value<iter_impl>;
using object_t = typename BasicJsonType::object_t;
using array_t = typename BasicJsonType::array_t;
@@ -3992,17 +10382,42 @@ class iter_impl
to iterator is not defined.
*/
+ /*!
+ @brief const copy constructor
+ @param[in] other const iterator to copy from
+ @note This copy constructor had to be defined explicitly to circumvent a bug
+ occurring on msvc v19.0 compiler (VS 2015) debug build. For more
+ information refer to: https://github.com/nlohmann/json/issues/1608
+ */
+ iter_impl(const iter_impl<const BasicJsonType>& other) noexcept
+ : m_object(other.m_object), m_it(other.m_it)
+ {}
+
+ /*!
+ @brief converting assignment
+ @param[in] other const iterator to copy from
+ @return const/non-const iterator
+ @note It is not checked whether @a other is initialized.
+ */
+ iter_impl& operator=(const iter_impl<const BasicJsonType>& other) noexcept
+ {
+ m_object = other.m_object;
+ m_it = other.m_it;
+ return *this;
+ }
+
/*!
@brief converting constructor
@param[in] other non-const iterator to copy from
@note It is not checked whether @a other is initialized.
*/
iter_impl(const iter_impl<typename std::remove_const<BasicJsonType>::type>& other) noexcept
- : m_object(other.m_object), m_it(other.m_it) {}
+ : m_object(other.m_object), m_it(other.m_it)
+ {}
/*!
@brief converting assignment
- @param[in,out] other non-const iterator to copy from
+ @param[in] other non-const iterator to copy from
@return const/non-const iterator
@note It is not checked whether @a other is initialized.
*/
@@ -4109,7 +10524,7 @@ class iter_impl
default:
{
- if (JSON_LIKELY(m_it.primitive_iterator.is_begin()))
+ if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.is_begin()))
{
return *m_object;
}
@@ -4143,7 +10558,7 @@ class iter_impl
default:
{
- if (JSON_LIKELY(m_it.primitive_iterator.is_begin()))
+ if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.is_begin()))
{
return m_object;
}
@@ -4246,7 +10661,7 @@ class iter_impl
bool operator==(const iter_impl& other) const
{
// if objects are not the same, the comparison is undefined
- if (JSON_UNLIKELY(m_object != other.m_object))
+ if (JSON_HEDLEY_UNLIKELY(m_object != other.m_object))
{
JSON_THROW(invalid_iterator::create(212, "cannot compare iterators of different containers"));
}
@@ -4282,7 +10697,7 @@ class iter_impl
bool operator<(const iter_impl& other) const
{
// if objects are not the same, the comparison is undefined
- if (JSON_UNLIKELY(m_object != other.m_object))
+ if (JSON_HEDLEY_UNLIKELY(m_object != other.m_object))
{
JSON_THROW(invalid_iterator::create(212, "cannot compare iterators of different containers"));
}
@@ -4442,7 +10857,7 @@ class iter_impl
default:
{
- if (JSON_LIKELY(m_it.primitive_iterator.get_value() == -n))
+ if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.get_value() == -n))
{
return *m_object;
}
@@ -4456,11 +10871,11 @@ class iter_impl
@brief return the key of an object iterator
@pre The iterator is initialized; i.e. `m_object != nullptr`.
*/
- typename object_t::key_type key() const
+ const typename object_t::key_type& key() const
{
assert(m_object != nullptr);
- if (JSON_LIKELY(m_object->is_object()))
+ if (JSON_HEDLEY_LIKELY(m_object->is_object()))
{
return m_it.object_iterator->first;
}
@@ -4481,112 +10896,13 @@ class iter_impl
/// associated JSON instance
pointer m_object = nullptr;
/// the actual iterator of the associated instance
- internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it;
+ internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it {};
};
-}
-}
+} // namespace detail
+} // namespace nlohmann
// #include <nlohmann/detail/iterators/iteration_proxy.hpp>
-
-#include <cstddef> // size_t
-#include <string> // string, to_string
-
-// #include <nlohmann/detail/value_t.hpp>
-
-
-namespace nlohmann
-{
-namespace detail
-{
-/// proxy class for the items() function
-template<typename IteratorType> class iteration_proxy
-{
- private:
- /// helper class for iteration
- class iteration_proxy_internal
- {
- private:
- /// the iterator
- IteratorType anchor;
- /// an index for arrays (used to create key names)
- std::size_t array_index = 0;
-
- public:
- explicit iteration_proxy_internal(IteratorType it) noexcept : anchor(it) {}
-
- /// dereference operator (needed for range-based for)
- iteration_proxy_internal& operator*()
- {
- return *this;
- }
-
- /// increment operator (needed for range-based for)
- iteration_proxy_internal& operator++()
- {
- ++anchor;
- ++array_index;
-
- return *this;
- }
-
- /// inequality operator (needed for range-based for)
- bool operator!=(const iteration_proxy_internal& o) const noexcept
- {
- return anchor != o.anchor;
- }
-
- /// return key of the iterator
- std::string key() const
- {
- assert(anchor.m_object != nullptr);
-
- switch (anchor.m_object->type())
- {
- // use integer array index as key
- case value_t::array:
- return std::to_string(array_index);
-
- // use key from the object
- case value_t::object:
- return anchor.key();
-
- // use an empty key for all primitive types
- default:
- return "";
- }
- }
-
- /// return value of the iterator
- typename IteratorType::reference value() const
- {
- return anchor.value();
- }
- };
-
- /// the container to iterate
- typename IteratorType::reference container;
-
- public:
- /// construct iteration proxy from a container
- explicit iteration_proxy(typename IteratorType::reference cont) noexcept
- : container(cont) {}
-
- /// return iterator begin (needed for range-based for)
- iteration_proxy_internal begin() noexcept
- {
- return iteration_proxy_internal(container.begin());
- }
-
- /// return iterator end (needed for range-based for)
- iteration_proxy_internal end() noexcept
- {
- return iteration_proxy_internal(container.end());
- }
-};
-}
-}
-
// #include <nlohmann/detail/iterators/json_reverse_iterator.hpp>
@@ -4611,10 +10927,10 @@ create @ref const_reverse_iterator).
@requirement The class satisfies the following concept requirements:
-
-[BidirectionalIterator](http://en.cppreference.com/w/cpp/concept/BidirectionalIterator):
+[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
The iterator that can be moved can be moved in both directions (i.e.
incremented and decremented).
-- [OutputIterator](http://en.cppreference.com/w/cpp/concept/OutputIterator):
+- [OutputIterator](https://en.cppreference.com/w/cpp/named_req/OutputIterator):
It is possible to write to the pointed-to element (only if @a Base is
@ref iterator).
@@ -4631,11 +10947,11 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
using reference = typename Base::reference;
/// create reverse iterator from iterator
- json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
+ explicit json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
: base_iterator(it) {}
/// create reverse iterator from base class
- json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
+ explicit json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
/// post-increment (it++)
json_reverse_iterator const operator++(int)
@@ -4705,1516 +11021,1205 @@ class json_reverse_iterator : public std::reverse_iterator<Base>
return it.operator * ();
}
};
-}
-}
+} // namespace detail
+} // namespace nlohmann
+
+// #include <nlohmann/detail/iterators/primitive_iterator.hpp>
-// #include <nlohmann/detail/output/output_adapters.hpp>
+// #include <nlohmann/detail/json_pointer.hpp>
-#include <algorithm> // copy
-#include <cstddef> // size_t
-#include <ios> // streamsize
-#include <iterator> // back_inserter
-#include <memory> // shared_ptr, make_shared
-#include <ostream> // basic_ostream
-#include <string> // basic_string
+#include <algorithm> // all_of
+#include <cassert> // assert
+#include <cctype> // isdigit
+#include <numeric> // accumulate
+#include <string> // string
+#include <utility> // move
#include <vector> // vector
+// #include <nlohmann/detail/exceptions.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+// #include <nlohmann/detail/value_t.hpp>
+
+
namespace nlohmann
{
-namespace detail
-{
-/// abstract output adapter interface
-template<typename CharType> struct output_adapter_protocol
+template<typename BasicJsonType>
+class json_pointer
{
- virtual void write_character(CharType c) = 0;
- virtual void write_characters(const CharType* s, std::size_t length) = 0;
- virtual ~output_adapter_protocol() = default;
-};
-
-/// a type to simplify interfaces
-template<typename CharType>
-using output_adapter_t = std::shared_ptr<output_adapter_protocol<CharType>>;
+ // allow basic_json to access private members
+ NLOHMANN_BASIC_JSON_TPL_DECLARATION
+ friend class basic_json;
-/// output adapter for byte vectors
-template<typename CharType>
-class output_vector_adapter : public output_adapter_protocol<CharType>
-{
public:
- explicit output_vector_adapter(std::vector<CharType>& vec) : v(vec) {}
+ /*!
+ @brief create JSON pointer
- void write_character(CharType c) override
- {
- v.push_back(c);
- }
+ Create a JSON pointer according to the syntax described in
+ [Section 3 of RFC6901](https://tools.ietf.org/html/rfc6901#section-3).
- void write_characters(const CharType* s, std::size_t length) override
- {
- std::copy(s, s + length, std::back_inserter(v));
- }
+ @param[in] s string representing the JSON pointer; if omitted, the empty
+ string is assumed which references the whole JSON value
- private:
- std::vector<CharType>& v;
-};
+ @throw parse_error.107 if the given JSON pointer @a s is nonempty and does
+ not begin with a slash (`/`); see example below
-/// output adapter for output streams
-template<typename CharType>
-class output_stream_adapter : public output_adapter_protocol<CharType>
-{
- public:
- explicit output_stream_adapter(std::basic_ostream<CharType>& s) : stream(s) {}
+ @throw parse_error.108 if a tilde (`~`) in the given JSON pointer @a s is
+ not followed by `0` (representing `~`) or `1` (representing `/`); see
+ example below
- void write_character(CharType c) override
- {
- stream.put(c);
- }
+ @liveexample{The example shows the construction several valid JSON pointers
+ as well as the exceptional behavior.,json_pointer}
- void write_characters(const CharType* s, std::size_t length) override
- {
- stream.write(s, static_cast<std::streamsize>(length));
- }
+ @since version 2.0.0
+ */
+ explicit json_pointer(const std::string& s = "")
+ : reference_tokens(split(s))
+ {}
- private:
- std::basic_ostream<CharType>& stream;
-};
+ /*!
+ @brief return a string representation of the JSON pointer
-/// output adapter for basic_string
-template<typename CharType, typename StringType = std::basic_string<CharType>>
-class output_string_adapter : public output_adapter_protocol<CharType>
-{
- public:
- explicit output_string_adapter(StringType& s) : str(s) {}
+ @invariant For each JSON pointer `ptr`, it holds:
+ @code {.cpp}
+ ptr == json_pointer(ptr.to_string());
+ @endcode
- void write_character(CharType c) override
+ @return a string representation of the JSON pointer
+
+ @liveexample{The example shows the result of `to_string`.,json_pointer__to_string}
+
+ @since version 2.0.0
+ */
+ std::string to_string() const
{
- str.push_back(c);
+ return std::accumulate(reference_tokens.begin(), reference_tokens.end(),
+ std::string{},
+ [](const std::string & a, const std::string & b)
+ {
+ return a + "/" + escape(b);
+ });
}
- void write_characters(const CharType* s, std::size_t length) override
+ /// @copydoc to_string()
+ operator std::string() const
{
- str.append(s, length);
+ return to_string();
}
- private:
- StringType& str;
-};
+ /*!
+ @brief append another JSON pointer at the end of this JSON pointer
-template<typename CharType, typename StringType = std::basic_string<CharType>>
-class output_adapter
-{
- public:
- output_adapter(std::vector<CharType>& vec)
- : oa(std::make_shared<output_vector_adapter<CharType>>(vec)) {}
+ @param[in] ptr JSON pointer to append
+ @return JSON pointer with @a ptr appended
- output_adapter(std::basic_ostream<CharType>& s)
- : oa(std::make_shared<output_stream_adapter<CharType>>(s)) {}
+ @liveexample{The example shows the usage of `operator/=`.,json_pointer__operator_add}
- output_adapter(StringType& s)
- : oa(std::make_shared<output_string_adapter<CharType, StringType>>(s)) {}
+ @complexity Linear in the length of @a ptr.
- operator output_adapter_t<CharType>()
+ @sa @ref operator/=(std::string) to append a reference token
+ @sa @ref operator/=(std::size_t) to append an array index
+ @sa @ref operator/(const json_pointer&, const json_pointer&) for a binary operator
+
+ @since version 3.6.0
+ */
+ json_pointer& operator/=(const json_pointer& ptr)
{
- return oa;
+ reference_tokens.insert(reference_tokens.end(),
+ ptr.reference_tokens.begin(),
+ ptr.reference_tokens.end());
+ return *this;
}
- private:
- output_adapter_t<CharType> oa = nullptr;
-};
-}
-}
-
-// #include <nlohmann/detail/input/binary_reader.hpp>
+ /*!
+ @brief append an unescaped reference token at the end of this JSON pointer
+ @param[in] token reference token to append
+ @return JSON pointer with @a token appended without escaping @a token
-#include <algorithm> // generate_n
-#include <array> // array
-#include <cassert> // assert
-#include <cmath> // ldexp
-#include <cstddef> // size_t
-#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
-#include <cstring> // memcpy
-#include <iomanip> // setw, setfill
-#include <ios> // hex
-#include <iterator> // back_inserter
-#include <limits> // numeric_limits
-#include <sstream> // stringstream
-#include <string> // char_traits, string
-#include <utility> // make_pair, move
+ @liveexample{The example shows the usage of `operator/=`.,json_pointer__operator_add}
-// #include <nlohmann/detail/input/input_adapters.hpp>
+ @complexity Amortized constant.
-// #include <nlohmann/detail/exceptions.hpp>
+ @sa @ref operator/=(const json_pointer&) to append a JSON pointer
+ @sa @ref operator/=(std::size_t) to append an array index
+ @sa @ref operator/(const json_pointer&, std::size_t) for a binary operator
-// #include <nlohmann/detail/macro_scope.hpp>
+ @since version 3.6.0
+ */
+ json_pointer& operator/=(std::string token)
+ {
+ push_back(std::move(token));
+ return *this;
+ }
-// #include <nlohmann/detail/value_t.hpp>
+ /*!
+ @brief append an array index at the end of this JSON pointer
+ @param[in] array_idx array index to append
+ @return JSON pointer with @a array_idx appended
-namespace nlohmann
-{
-namespace detail
-{
-///////////////////
-// binary reader //
-///////////////////
+ @liveexample{The example shows the usage of `operator/=`.,json_pointer__operator_add}
-/*!
-@brief deserialization of CBOR and MessagePack values
-*/
-template<typename BasicJsonType>
-class binary_reader
-{
- using number_integer_t = typename BasicJsonType::number_integer_t;
- using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
- using string_t = typename BasicJsonType::string_t;
+ @complexity Amortized constant.
- public:
- /*!
- @brief create a binary reader
+ @sa @ref operator/=(const json_pointer&) to append a JSON pointer
+ @sa @ref operator/=(std::string) to append a reference token
+ @sa @ref operator/(const json_pointer&, std::string) for a binary operator
- @param[in] adapter input adapter to read from
+ @since version 3.6.0
*/
- explicit binary_reader(input_adapter_t adapter) : ia(std::move(adapter))
+ json_pointer& operator/=(std::size_t array_idx)
{
- assert(ia);
+ return *this /= std::to_string(array_idx);
}
/*!
- @brief create a JSON value from CBOR input
+ @brief create a new JSON pointer by appending the right JSON pointer at the end of the left JSON pointer
- @param[in] strict whether to expect the input to be consumed completed
- @return JSON value created from CBOR input
+ @param[in] lhs JSON pointer
+ @param[in] rhs JSON pointer
+ @return a new JSON pointer with @a rhs appended to @a lhs
- @throw parse_error.110 if input ended unexpectedly or the end of file was
- not reached when @a strict was set to true
- @throw parse_error.112 if unsupported byte was read
+ @liveexample{The example shows the usage of `operator/`.,json_pointer__operator_add_binary}
+
+ @complexity Linear in the length of @a lhs and @a rhs.
+
+ @sa @ref operator/=(const json_pointer&) to append a JSON pointer
+
+ @since version 3.6.0
*/
- BasicJsonType parse_cbor(const bool strict)
+ friend json_pointer operator/(const json_pointer& lhs,
+ const json_pointer& rhs)
{
- const auto res = parse_cbor_internal();
- if (strict)
- {
- get();
- expect_eof();
- }
- return res;
+ return json_pointer(lhs) /= rhs;
}
/*!
- @brief create a JSON value from MessagePack input
+ @brief create a new JSON pointer by appending the unescaped token at the end of the JSON pointer
- @param[in] strict whether to expect the input to be consumed completed
- @return JSON value created from MessagePack input
+ @param[in] ptr JSON pointer
+ @param[in] token reference token
+ @return a new JSON pointer with unescaped @a token appended to @a ptr
- @throw parse_error.110 if input ended unexpectedly or the end of file was
- not reached when @a strict was set to true
- @throw parse_error.112 if unsupported byte was read
+ @liveexample{The example shows the usage of `operator/`.,json_pointer__operator_add_binary}
+
+ @complexity Linear in the length of @a ptr.
+
+ @sa @ref operator/=(std::string) to append a reference token
+
+ @since version 3.6.0
*/
- BasicJsonType parse_msgpack(const bool strict)
+ friend json_pointer operator/(const json_pointer& ptr, std::string token)
{
- const auto res = parse_msgpack_internal();
- if (strict)
- {
- get();
- expect_eof();
- }
- return res;
+ return json_pointer(ptr) /= std::move(token);
}
/*!
- @brief create a JSON value from UBJSON input
+ @brief create a new JSON pointer by appending the array-index-token at the end of the JSON pointer
- @param[in] strict whether to expect the input to be consumed completed
- @return JSON value created from UBJSON input
+ @param[in] ptr JSON pointer
+ @param[in] array_idx array index
+ @return a new JSON pointer with @a array_idx appended to @a ptr
- @throw parse_error.110 if input ended unexpectedly or the end of file was
- not reached when @a strict was set to true
- @throw parse_error.112 if unsupported byte was read
+ @liveexample{The example shows the usage of `operator/`.,json_pointer__operator_add_binary}
+
+ @complexity Linear in the length of @a ptr.
+
+ @sa @ref operator/=(std::size_t) to append an array index
+
+ @since version 3.6.0
*/
- BasicJsonType parse_ubjson(const bool strict)
+ friend json_pointer operator/(const json_pointer& ptr, std::size_t array_idx)
{
- const auto res = parse_ubjson_internal();
- if (strict)
- {
- get_ignore_noop();
- expect_eof();
- }
- return res;
+ return json_pointer(ptr) /= array_idx;
}
/*!
- @brief determine system byte order
+ @brief returns the parent of this JSON pointer
+
+ @return parent of this JSON pointer; in case this JSON pointer is the root,
+ the root itself is returned
- @return true if and only if system's byte order is little endian
+ @complexity Linear in the length of the JSON pointer.
+
+ @liveexample{The example shows the result of `parent_pointer` for different
+ JSON Pointers.,json_pointer__parent_pointer}
- @note from http://stackoverflow.com/a/1001328/266378
+ @since version 3.6.0
*/
- static constexpr bool little_endianess(int num = 1) noexcept
+ json_pointer parent_pointer() const
{
- return (*reinterpret_cast<char*>(&num) == 1);
+ if (empty())
+ {
+ return *this;
+ }
+
+ json_pointer res = *this;
+ res.pop_back();
+ return res;
}
- private:
/*!
- @param[in] get_char whether a new character should be retrieved from the
- input (true, default) or whether the last read
- character should be considered instead
- */
- BasicJsonType parse_cbor_internal(const bool get_char = true)
- {
- switch (get_char ? get() : current)
- {
- // EOF
- case std::char_traits<char>::eof():
- JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+ @brief remove last reference token
- // Integer 0x00..0x17 (0..23)
- case 0x00:
- case 0x01:
- case 0x02:
- case 0x03:
- case 0x04:
- case 0x05:
- case 0x06:
- case 0x07:
- case 0x08:
- case 0x09:
- case 0x0A:
- case 0x0B:
- case 0x0C:
- case 0x0D:
- case 0x0E:
- case 0x0F:
- case 0x10:
- case 0x11:
- case 0x12:
- case 0x13:
- case 0x14:
- case 0x15:
- case 0x16:
- case 0x17:
- return static_cast<number_unsigned_t>(current);
+ @pre not `empty()`
- case 0x18: // Unsigned integer (one-byte uint8_t follows)
- return get_number<uint8_t>();
+ @liveexample{The example shows the usage of `pop_back`.,json_pointer__pop_back}
- case 0x19: // Unsigned integer (two-byte uint16_t follows)
- return get_number<uint16_t>();
+ @complexity Constant.
+
+ @throw out_of_range.405 if JSON pointer has no parent
+
+ @since version 3.6.0
+ */
+ void pop_back()
+ {
+ if (JSON_HEDLEY_UNLIKELY(empty()))
+ {
+ JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent"));
+ }
- case 0x1A: // Unsigned integer (four-byte uint32_t follows)
- return get_number<uint32_t>();
+ reference_tokens.pop_back();
+ }
- case 0x1B: // Unsigned integer (eight-byte uint64_t follows)
- return get_number<uint64_t>();
+ /*!
+ @brief return last reference token
- // Negative integer -1-0x00..-1-0x17 (-1..-24)
- case 0x20:
- case 0x21:
- case 0x22:
- case 0x23:
- case 0x24:
- case 0x25:
- case 0x26:
- case 0x27:
- case 0x28:
- case 0x29:
- case 0x2A:
- case 0x2B:
- case 0x2C:
- case 0x2D:
- case 0x2E:
- case 0x2F:
- case 0x30:
- case 0x31:
- case 0x32:
- case 0x33:
- case 0x34:
- case 0x35:
- case 0x36:
- case 0x37:
- return static_cast<int8_t>(0x20 - 1 - current);
+ @pre not `empty()`
+ @return last reference token
- case 0x38: // Negative integer (one-byte uint8_t follows)
- {
- return static_cast<number_integer_t>(-1) - get_number<uint8_t>();
- }
+ @liveexample{The example shows the usage of `back`.,json_pointer__back}
- case 0x39: // Negative integer -1-n (two-byte uint16_t follows)
- {
- return static_cast<number_integer_t>(-1) - get_number<uint16_t>();
- }
+ @complexity Constant.
- case 0x3A: // Negative integer -1-n (four-byte uint32_t follows)
- {
- return static_cast<number_integer_t>(-1) - get_number<uint32_t>();
- }
+ @throw out_of_range.405 if JSON pointer has no parent
- case 0x3B: // Negative integer -1-n (eight-byte uint64_t follows)
- {
- return static_cast<number_integer_t>(-1) -
- static_cast<number_integer_t>(get_number<uint64_t>());
- }
+ @since version 3.6.0
+ */
+ const std::string& back() const
+ {
+ if (JSON_HEDLEY_UNLIKELY(empty()))
+ {
+ JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent"));
+ }
- // UTF-8 string (0x00..0x17 bytes follow)
- case 0x60:
- case 0x61:
- case 0x62:
- case 0x63:
- case 0x64:
- case 0x65:
- case 0x66:
- case 0x67:
- case 0x68:
- case 0x69:
- case 0x6A:
- case 0x6B:
- case 0x6C:
- case 0x6D:
- case 0x6E:
- case 0x6F:
- case 0x70:
- case 0x71:
- case 0x72:
- case 0x73:
- case 0x74:
- case 0x75:
- case 0x76:
- case 0x77:
- case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
- case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
- case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
- case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
- case 0x7F: // UTF-8 string (indefinite length)
- {
- return get_cbor_string();
- }
+ return reference_tokens.back();
+ }
- // array (0x00..0x17 data items follow)
- case 0x80:
- case 0x81:
- case 0x82:
- case 0x83:
- case 0x84:
- case 0x85:
- case 0x86:
- case 0x87:
- case 0x88:
- case 0x89:
- case 0x8A:
- case 0x8B:
- case 0x8C:
- case 0x8D:
- case 0x8E:
- case 0x8F:
- case 0x90:
- case 0x91:
- case 0x92:
- case 0x93:
- case 0x94:
- case 0x95:
- case 0x96:
- case 0x97:
- {
- return get_cbor_array(current & 0x1F);
- }
+ /*!
+ @brief append an unescaped token at the end of the reference pointer
- case 0x98: // array (one-byte uint8_t for n follows)
- {
- return get_cbor_array(get_number<uint8_t>());
- }
+ @param[in] token token to add
- case 0x99: // array (two-byte uint16_t for n follow)
- {
- return get_cbor_array(get_number<uint16_t>());
- }
+ @complexity Amortized constant.
- case 0x9A: // array (four-byte uint32_t for n follow)
- {
- return get_cbor_array(get_number<uint32_t>());
- }
+ @liveexample{The example shows the result of `push_back` for different
+ JSON Pointers.,json_pointer__push_back}
- case 0x9B: // array (eight-byte uint64_t for n follow)
- {
- return get_cbor_array(get_number<uint64_t>());
- }
+ @since version 3.6.0
+ */
+ void push_back(const std::string& token)
+ {
+ reference_tokens.push_back(token);
+ }
- case 0x9F: // array (indefinite length)
- {
- BasicJsonType result = value_t::array;
- while (get() != 0xFF)
- {
- result.push_back(parse_cbor_internal(false));
- }
- return result;
- }
+ /// @copydoc push_back(const std::string&)
+ void push_back(std::string&& token)
+ {
+ reference_tokens.push_back(std::move(token));
+ }
- // map (0x00..0x17 pairs of data items follow)
- case 0xA0:
- case 0xA1:
- case 0xA2:
- case 0xA3:
- case 0xA4:
- case 0xA5:
- case 0xA6:
- case 0xA7:
- case 0xA8:
- case 0xA9:
- case 0xAA:
- case 0xAB:
- case 0xAC:
- case 0xAD:
- case 0xAE:
- case 0xAF:
- case 0xB0:
- case 0xB1:
- case 0xB2:
- case 0xB3:
- case 0xB4:
- case 0xB5:
- case 0xB6:
- case 0xB7:
- {
- return get_cbor_object(current & 0x1F);
- }
+ /*!
+ @brief return whether pointer points to the root document
- case 0xB8: // map (one-byte uint8_t for n follows)
- {
- return get_cbor_object(get_number<uint8_t>());
- }
+ @return true iff the JSON pointer points to the root document
- case 0xB9: // map (two-byte uint16_t for n follow)
- {
- return get_cbor_object(get_number<uint16_t>());
- }
+ @complexity Constant.
- case 0xBA: // map (four-byte uint32_t for n follow)
- {
- return get_cbor_object(get_number<uint32_t>());
- }
+ @exceptionsafety No-throw guarantee: this function never throws exceptions.
- case 0xBB: // map (eight-byte uint64_t for n follow)
- {
- return get_cbor_object(get_number<uint64_t>());
- }
+ @liveexample{The example shows the result of `empty` for different JSON
+ Pointers.,json_pointer__empty}
- case 0xBF: // map (indefinite length)
- {
- BasicJsonType result = value_t::object;
- while (get() != 0xFF)
- {
- auto key = get_cbor_string();
- result[key] = parse_cbor_internal();
- }
- return result;
- }
+ @since version 3.6.0
+ */
+ bool empty() const noexcept
+ {
+ return reference_tokens.empty();
+ }
- case 0xF4: // false
- {
- return false;
- }
+ private:
+ /*!
+ @param[in] s reference token to be converted into an array index
- case 0xF5: // true
- {
- return true;
- }
+ @return integer representation of @a s
- case 0xF6: // null
- {
- return value_t::null;
- }
+ @throw out_of_range.404 if string @a s could not be converted to an integer
+ */
+ static int array_index(const std::string& s)
+ {
+ // error condition (cf. RFC 6901, Sect. 4)
+ if (JSON_HEDLEY_UNLIKELY(s.size() > 1 and s[0] == '0'))
+ {
+ JSON_THROW(detail::parse_error::create(106, 0,
+ "array index '" + s +
+ "' must not begin with '0'"));
+ }
- case 0xF9: // Half-Precision Float (two-byte IEEE 754)
- {
- const int byte1 = get();
- unexpect_eof();
- const int byte2 = get();
- unexpect_eof();
+ // error condition (cf. RFC 6901, Sect. 4)
+ if (JSON_HEDLEY_UNLIKELY(s.size() > 1 and not (s[0] >= '1' and s[0] <= '9')))
+ {
+ JSON_THROW(detail::parse_error::create(109, 0, "array index '" + s + "' is not a number"));
+ }
- // code from RFC 7049, Appendix D, Figure 3:
- // As half-precision floating-point numbers were only added
- // to IEEE 754 in 2008, today's programming platforms often
- // still only have limited support for them. It is very
- // easy to include at least decoding support for them even
- // without such support. An example of a small decoder for
- // half-precision floating-point numbers in the C language
- // is shown in Fig. 3.
- const int half = (byte1 << 8) + byte2;
- const int exp = (half >> 10) & 0x1F;
- const int mant = half & 0x3FF;
- double val;
- if (exp == 0)
- {
- val = std::ldexp(mant, -24);
- }
- else if (exp != 31)
- {
- val = std::ldexp(mant + 1024, exp - 25);
- }
- else
- {
- val = (mant == 0) ? std::numeric_limits<double>::infinity()
- : std::numeric_limits<double>::quiet_NaN();
- }
- return (half & 0x8000) != 0 ? -val : val;
- }
+ std::size_t processed_chars = 0;
+ int res = 0;
+ JSON_TRY
+ {
+ res = std::stoi(s, &processed_chars);
+ }
+ JSON_CATCH(std::out_of_range&)
+ {
+ JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + s + "'"));
+ }
- case 0xFA: // Single-Precision Float (four-byte IEEE 754)
- {
- return get_number<float>();
- }
+ // check if the string was completely read
+ if (JSON_HEDLEY_UNLIKELY(processed_chars != s.size()))
+ {
+ JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + s + "'"));
+ }
- case 0xFB: // Double-Precision Float (eight-byte IEEE 754)
- {
- return get_number<double>();
- }
+ return res;
+ }
- default: // anything else (0xFF is handled inside the other types)
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(112, chars_read, "error reading CBOR; last byte: 0x" + ss.str()));
- }
+ json_pointer top() const
+ {
+ if (JSON_HEDLEY_UNLIKELY(empty()))
+ {
+ JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent"));
}
+
+ json_pointer result = *this;
+ result.reference_tokens = {reference_tokens[0]};
+ return result;
}
- BasicJsonType parse_msgpack_internal()
+ /*!
+ @brief create and return a reference to the pointed to value
+
+ @complexity Linear in the number of reference tokens.
+
+ @throw parse_error.109 if array index is not a number
+ @throw type_error.313 if value cannot be unflattened
+ */
+ BasicJsonType& get_and_create(BasicJsonType& j) const
{
- switch (get())
+ using size_type = typename BasicJsonType::size_type;
+ auto result = &j;
+
+ // in case no reference tokens exist, return a reference to the JSON value
+ // j which will be overwritten by a primitive value
+ for (const auto& reference_token : reference_tokens)
{
- // EOF
- case std::char_traits<char>::eof():
- JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+ switch (result->type())
+ {
+ case detail::value_t::null:
+ {
+ if (reference_token == "0")
+ {
+ // start a new array if reference token is 0
+ result = &result->operator[](0);
+ }
+ else
+ {
+ // start a new object otherwise
+ result = &result->operator[](reference_token);
+ }
+ break;
+ }
- // positive fixint
- case 0x00:
- case 0x01:
- case 0x02:
- case 0x03:
- case 0x04:
- case 0x05:
- case 0x06:
- case 0x07:
- case 0x08:
- case 0x09:
- case 0x0A:
- case 0x0B:
- case 0x0C:
- case 0x0D:
- case 0x0E:
- case 0x0F:
- case 0x10:
- case 0x11:
- case 0x12:
- case 0x13:
- case 0x14:
- case 0x15:
- case 0x16:
- case 0x17:
- case 0x18:
- case 0x19:
- case 0x1A:
- case 0x1B:
- case 0x1C:
- case 0x1D:
- case 0x1E:
- case 0x1F:
- case 0x20:
- case 0x21:
- case 0x22:
- case 0x23:
- case 0x24:
- case 0x25:
- case 0x26:
- case 0x27:
- case 0x28:
- case 0x29:
- case 0x2A:
- case 0x2B:
- case 0x2C:
- case 0x2D:
- case 0x2E:
- case 0x2F:
- case 0x30:
- case 0x31:
- case 0x32:
- case 0x33:
- case 0x34:
- case 0x35:
- case 0x36:
- case 0x37:
- case 0x38:
- case 0x39:
- case 0x3A:
- case 0x3B:
- case 0x3C:
- case 0x3D:
- case 0x3E:
- case 0x3F:
- case 0x40:
- case 0x41:
- case 0x42:
- case 0x43:
- case 0x44:
- case 0x45:
- case 0x46:
- case 0x47:
- case 0x48:
- case 0x49:
- case 0x4A:
- case 0x4B:
- case 0x4C:
- case 0x4D:
- case 0x4E:
- case 0x4F:
- case 0x50:
- case 0x51:
- case 0x52:
- case 0x53:
- case 0x54:
- case 0x55:
- case 0x56:
- case 0x57:
- case 0x58:
- case 0x59:
- case 0x5A:
- case 0x5B:
- case 0x5C:
- case 0x5D:
- case 0x5E:
- case 0x5F:
- case 0x60:
- case 0x61:
- case 0x62:
- case 0x63:
- case 0x64:
- case 0x65:
- case 0x66:
- case 0x67:
- case 0x68:
- case 0x69:
- case 0x6A:
- case 0x6B:
- case 0x6C:
- case 0x6D:
- case 0x6E:
- case 0x6F:
- case 0x70:
- case 0x71:
- case 0x72:
- case 0x73:
- case 0x74:
- case 0x75:
- case 0x76:
- case 0x77:
- case 0x78:
- case 0x79:
- case 0x7A:
- case 0x7B:
- case 0x7C:
- case 0x7D:
- case 0x7E:
- case 0x7F:
- return static_cast<number_unsigned_t>(current);
+ case detail::value_t::object:
+ {
+ // create an entry in the object
+ result = &result->operator[](reference_token);
+ break;
+ }
- // fixmap
- case 0x80:
- case 0x81:
- case 0x82:
- case 0x83:
- case 0x84:
- case 0x85:
- case 0x86:
- case 0x87:
- case 0x88:
- case 0x89:
- case 0x8A:
- case 0x8B:
- case 0x8C:
- case 0x8D:
- case 0x8E:
- case 0x8F:
- {
- return get_msgpack_object(current & 0x0F);
- }
+ case detail::value_t::array:
+ {
+ // create an entry in the array
+ result = &result->operator[](static_cast<size_type>(array_index(reference_token)));
+ break;
+ }
- // fixarray
- case 0x90:
- case 0x91:
- case 0x92:
- case 0x93:
- case 0x94:
- case 0x95:
- case 0x96:
- case 0x97:
- case 0x98:
- case 0x99:
- case 0x9A:
- case 0x9B:
- case 0x9C:
- case 0x9D:
- case 0x9E:
- case 0x9F:
- {
- return get_msgpack_array(current & 0x0F);
+ /*
+ The following code is only reached if there exists a reference
+ token _and_ the current value is primitive. In this case, we have
+ an error situation, because primitive values may only occur as
+ single value; that is, with an empty list of reference tokens.
+ */
+ default:
+ JSON_THROW(detail::type_error::create(313, "invalid value to unflatten"));
}
+ }
- // fixstr
- case 0xA0:
- case 0xA1:
- case 0xA2:
- case 0xA3:
- case 0xA4:
- case 0xA5:
- case 0xA6:
- case 0xA7:
- case 0xA8:
- case 0xA9:
- case 0xAA:
- case 0xAB:
- case 0xAC:
- case 0xAD:
- case 0xAE:
- case 0xAF:
- case 0xB0:
- case 0xB1:
- case 0xB2:
- case 0xB3:
- case 0xB4:
- case 0xB5:
- case 0xB6:
- case 0xB7:
- case 0xB8:
- case 0xB9:
- case 0xBA:
- case 0xBB:
- case 0xBC:
- case 0xBD:
- case 0xBE:
- case 0xBF:
- return get_msgpack_string();
+ return *result;
+ }
- case 0xC0: // nil
- return value_t::null;
+ /*!
+ @brief return a reference to the pointed to value
- case 0xC2: // false
- return false;
+ @note This version does not throw if a value is not present, but tries to
+ create nested values instead. For instance, calling this function
+ with pointer `"/this/that"` on a null value is equivalent to calling
+ `operator[]("this").operator[]("that")` on that value, effectively
+ changing the null value to an object.
- case 0xC3: // true
- return true;
+ @param[in] ptr a JSON value
- case 0xCA: // float 32
- return get_number<float>();
+ @return reference to the JSON value pointed to by the JSON pointer
- case 0xCB: // float 64
- return get_number<double>();
+ @complexity Linear in the length of the JSON pointer.
- case 0xCC: // uint 8
- return get_number<uint8_t>();
+ @throw parse_error.106 if an array index begins with '0'
+ @throw parse_error.109 if an array index was not a number
+ @throw out_of_range.404 if the JSON pointer can not be resolved
+ */
+ BasicJsonType& get_unchecked(BasicJsonType* ptr) const
+ {
+ using size_type = typename BasicJsonType::size_type;
+ for (const auto& reference_token : reference_tokens)
+ {
+ // convert null values to arrays or objects before continuing
+ if (ptr->is_null())
+ {
+ // check if reference token is a number
+ const bool nums =
+ std::all_of(reference_token.begin(), reference_token.end(),
+ [](const unsigned char x)
+ {
+ return std::isdigit(x);
+ });
- case 0xCD: // uint 16
- return get_number<uint16_t>();
+ // change value to array for numbers or "-" or to object otherwise
+ *ptr = (nums or reference_token == "-")
+ ? detail::value_t::array
+ : detail::value_t::object;
+ }
- case 0xCE: // uint 32
- return get_number<uint32_t>();
+ switch (ptr->type())
+ {
+ case detail::value_t::object:
+ {
+ // use unchecked object access
+ ptr = &ptr->operator[](reference_token);
+ break;
+ }
- case 0xCF: // uint 64
- return get_number<uint64_t>();
+ case detail::value_t::array:
+ {
+ if (reference_token == "-")
+ {
+ // explicitly treat "-" as index beyond the end
+ ptr = &ptr->operator[](ptr->m_value.array->size());
+ }
+ else
+ {
+ // convert array index to number; unchecked access
+ ptr = &ptr->operator[](
+ static_cast<size_type>(array_index(reference_token)));
+ }
+ break;
+ }
- case 0xD0: // int 8
- return get_number<int8_t>();
+ default:
+ JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
+ }
+ }
- case 0xD1: // int 16
- return get_number<int16_t>();
+ return *ptr;
+ }
- case 0xD2: // int 32
- return get_number<int32_t>();
+ /*!
+ @throw parse_error.106 if an array index begins with '0'
+ @throw parse_error.109 if an array index was not a number
+ @throw out_of_range.402 if the array index '-' is used
+ @throw out_of_range.404 if the JSON pointer can not be resolved
+ */
+ BasicJsonType& get_checked(BasicJsonType* ptr) const
+ {
+ using size_type = typename BasicJsonType::size_type;
+ for (const auto& reference_token : reference_tokens)
+ {
+ switch (ptr->type())
+ {
+ case detail::value_t::object:
+ {
+ // note: at performs range check
+ ptr = &ptr->at(reference_token);
+ break;
+ }
- case 0xD3: // int 64
- return get_number<int64_t>();
+ case detail::value_t::array:
+ {
+ if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+ {
+ // "-" always fails the range check
+ JSON_THROW(detail::out_of_range::create(402,
+ "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
+ ") is out of range"));
+ }
- case 0xD9: // str 8
- case 0xDA: // str 16
- case 0xDB: // str 32
- return get_msgpack_string();
+ // note: at performs range check
+ ptr = &ptr->at(static_cast<size_type>(array_index(reference_token)));
+ break;
+ }
- case 0xDC: // array 16
- {
- return get_msgpack_array(get_number<uint16_t>());
+ default:
+ JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
}
+ }
- case 0xDD: // array 32
+ return *ptr;
+ }
+
+ /*!
+ @brief return a const reference to the pointed to value
+
+ @param[in] ptr a JSON value
+
+ @return const reference to the JSON value pointed to by the JSON
+ pointer
+
+ @throw parse_error.106 if an array index begins with '0'
+ @throw parse_error.109 if an array index was not a number
+ @throw out_of_range.402 if the array index '-' is used
+ @throw out_of_range.404 if the JSON pointer can not be resolved
+ */
+ const BasicJsonType& get_unchecked(const BasicJsonType* ptr) const
+ {
+ using size_type = typename BasicJsonType::size_type;
+ for (const auto& reference_token : reference_tokens)
+ {
+ switch (ptr->type())
{
- return get_msgpack_array(get_number<uint32_t>());
+ case detail::value_t::object:
+ {
+ // use unchecked object access
+ ptr = &ptr->operator[](reference_token);
+ break;
+ }
+
+ case detail::value_t::array:
+ {
+ if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+ {
+ // "-" cannot be used for const access
+ JSON_THROW(detail::out_of_range::create(402,
+ "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
+ ") is out of range"));
+ }
+
+ // use unchecked array access
+ ptr = &ptr->operator[](
+ static_cast<size_type>(array_index(reference_token)));
+ break;
+ }
+
+ default:
+ JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
}
+ }
- case 0xDE: // map 16
+ return *ptr;
+ }
+
+ /*!
+ @throw parse_error.106 if an array index begins with '0'
+ @throw parse_error.109 if an array index was not a number
+ @throw out_of_range.402 if the array index '-' is used
+ @throw out_of_range.404 if the JSON pointer can not be resolved
+ */
+ const BasicJsonType& get_checked(const BasicJsonType* ptr) const
+ {
+ using size_type = typename BasicJsonType::size_type;
+ for (const auto& reference_token : reference_tokens)
+ {
+ switch (ptr->type())
{
- return get_msgpack_object(get_number<uint16_t>());
+ case detail::value_t::object:
+ {
+ // note: at performs range check
+ ptr = &ptr->at(reference_token);
+ break;
+ }
+
+ case detail::value_t::array:
+ {
+ if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+ {
+ // "-" always fails the range check
+ JSON_THROW(detail::out_of_range::create(402,
+ "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
+ ") is out of range"));
+ }
+
+ // note: at performs range check
+ ptr = &ptr->at(static_cast<size_type>(array_index(reference_token)));
+ break;
+ }
+
+ default:
+ JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
}
+ }
- case 0xDF: // map 32
+ return *ptr;
+ }
+
+ /*!
+ @throw parse_error.106 if an array index begins with '0'
+ @throw parse_error.109 if an array index was not a number
+ */
+ bool contains(const BasicJsonType* ptr) const
+ {
+ using size_type = typename BasicJsonType::size_type;
+ for (const auto& reference_token : reference_tokens)
+ {
+ switch (ptr->type())
{
- return get_msgpack_object(get_number<uint32_t>());
- }
+ case detail::value_t::object:
+ {
+ if (not ptr->contains(reference_token))
+ {
+ // we did not find the key in the object
+ return false;
+ }
- // positive fixint
- case 0xE0:
- case 0xE1:
- case 0xE2:
- case 0xE3:
- case 0xE4:
- case 0xE5:
- case 0xE6:
- case 0xE7:
- case 0xE8:
- case 0xE9:
- case 0xEA:
- case 0xEB:
- case 0xEC:
- case 0xED:
- case 0xEE:
- case 0xEF:
- case 0xF0:
- case 0xF1:
- case 0xF2:
- case 0xF3:
- case 0xF4:
- case 0xF5:
- case 0xF6:
- case 0xF7:
- case 0xF8:
- case 0xF9:
- case 0xFA:
- case 0xFB:
- case 0xFC:
- case 0xFD:
- case 0xFE:
- case 0xFF:
- return static_cast<int8_t>(current);
+ ptr = &ptr->operator[](reference_token);
+ break;
+ }
+
+ case detail::value_t::array:
+ {
+ if (JSON_HEDLEY_UNLIKELY(reference_token == "-"))
+ {
+ // "-" always fails the range check
+ return false;
+ }
+ if (JSON_HEDLEY_UNLIKELY(reference_token.size() == 1 and not ("0" <= reference_token and reference_token <= "9")))
+ {
+ // invalid char
+ return false;
+ }
+ if (JSON_HEDLEY_UNLIKELY(reference_token.size() > 1))
+ {
+ if (JSON_HEDLEY_UNLIKELY(not ('1' <= reference_token[0] and reference_token[0] <= '9')))
+ {
+ // first char should be between '1' and '9'
+ return false;
+ }
+ for (std::size_t i = 1; i < reference_token.size(); i++)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not ('0' <= reference_token[i] and reference_token[i] <= '9')))
+ {
+ // other char should be between '0' and '9'
+ return false;
+ }
+ }
+ }
- default: // anything else
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(112, chars_read,
- "error reading MessagePack; last byte: 0x" + ss.str()));
+ const auto idx = static_cast<size_type>(array_index(reference_token));
+ if (idx >= ptr->size())
+ {
+ // index out of range
+ return false;
+ }
+
+ ptr = &ptr->operator[](idx);
+ break;
+ }
+
+ default:
+ {
+ // we do not expect primitive values if there is still a
+ // reference token to process
+ return false;
+ }
}
}
- }
- /*!
- @param[in] get_char whether a new character should be retrieved from the
- input (true, default) or whether the last read
- character should be considered instead
- */
- BasicJsonType parse_ubjson_internal(const bool get_char = true)
- {
- return get_ubjson_value(get_char ? get_ignore_noop() : current);
+ // no reference token left means we found a primitive value
+ return true;
}
/*!
- @brief get next character from the input
+ @brief split the string input to reference tokens
- This function provides the interface to the used input adapter. It does
- not throw in case the input reached EOF, but returns a -'ve valued
- `std::char_traits<char>::eof()` in that case.
+ @note This function is only called by the json_pointer constructor.
+ All exceptions below are documented there.
- @return character read from the input
+ @throw parse_error.107 if the pointer is not empty or begins with '/'
+ @throw parse_error.108 if character '~' is not followed by '0' or '1'
*/
- int get()
+ static std::vector<std::string> split(const std::string& reference_string)
{
- ++chars_read;
- return (current = ia->get_character());
- }
+ std::vector<std::string> result;
- /*!
- @return character read from the input after ignoring all 'N' entries
- */
- int get_ignore_noop()
- {
- do
+ // special case: empty reference string -> no reference tokens
+ if (reference_string.empty())
{
- get();
+ return result;
}
- while (current == 'N');
-
- return current;
- }
-
- /*
- @brief read a number from the input
-
- @tparam NumberType the type of the number
- @return number of type @a NumberType
-
- @note This function needs to respect the system's endianess, because
- bytes in CBOR and MessagePack are stored in network order (big
- endian) and therefore need reordering on little endian systems.
+ // check if nonempty reference string begins with slash
+ if (JSON_HEDLEY_UNLIKELY(reference_string[0] != '/'))
+ {
+ JSON_THROW(detail::parse_error::create(107, 1,
+ "JSON pointer must be empty or begin with '/' - was: '" +
+ reference_string + "'"));
+ }
- @throw parse_error.110 if input has less than `sizeof(NumberType)` bytes
- */
- template<typename NumberType> NumberType get_number()
- {
- // step 1: read input into array with system's byte order
- std::array<uint8_t, sizeof(NumberType)> vec;
- for (std::size_t i = 0; i < sizeof(NumberType); ++i)
+ // extract the reference tokens:
+ // - slash: position of the last read slash (or end of string)
+ // - start: position after the previous slash
+ for (
+ // search for the first slash after the first character
+ std::size_t slash = reference_string.find_first_of('/', 1),
+ // set the beginning of the first reference token
+ start = 1;
+ // we can stop if start == 0 (if slash == std::string::npos)
+ start != 0;
+ // set the beginning of the next reference token
+ // (will eventually be 0 if slash == std::string::npos)
+ start = (slash == std::string::npos) ? 0 : slash + 1,
+ // find next slash
+ slash = reference_string.find_first_of('/', start))
{
- get();
- unexpect_eof();
+ // use the text between the beginning of the reference token
+ // (start) and the last slash (slash).
+ auto reference_token = reference_string.substr(start, slash - start);
- // reverse byte order prior to conversion if necessary
- if (is_little_endian)
- {
- vec[sizeof(NumberType) - i - 1] = static_cast<uint8_t>(current);
- }
- else
+ // check reference tokens are properly escaped
+ for (std::size_t pos = reference_token.find_first_of('~');
+ pos != std::string::npos;
+ pos = reference_token.find_first_of('~', pos + 1))
{
- vec[i] = static_cast<uint8_t>(current); // LCOV_EXCL_LINE
+ assert(reference_token[pos] == '~');
+
+ // ~ must be followed by 0 or 1
+ if (JSON_HEDLEY_UNLIKELY(pos == reference_token.size() - 1 or
+ (reference_token[pos + 1] != '0' and
+ reference_token[pos + 1] != '1')))
+ {
+ JSON_THROW(detail::parse_error::create(108, 0, "escape character '~' must be followed with '0' or '1'"));
+ }
}
+
+ // finally, store the reference token
+ unescape(reference_token);
+ result.push_back(reference_token);
}
- // step 2: convert array into number of type T and return
- NumberType result;
- std::memcpy(&result, vec.data(), sizeof(NumberType));
return result;
}
/*!
- @brief create a string by reading characters from the input
-
- @param[in] len number of bytes to read
+ @brief replace all occurrences of a substring by another string
- @note We can not reserve @a len bytes for the result, because @a len
- may be too large. Usually, @ref unexpect_eof() detects the end of
- the input before we run out of string memory.
+ @param[in,out] s the string to manipulate; changed so that all
+ occurrences of @a f are replaced with @a t
+ @param[in] f the substring to replace with @a t
+ @param[in] t the string to replace @a f
- @return string created by reading @a len bytes
+ @pre The search string @a f must not be empty. **This precondition is
+ enforced with an assertion.**
- @throw parse_error.110 if input has less than @a len bytes
+ @since version 2.0.0
*/
- template<typename NumberType>
- string_t get_string(const NumberType len)
+ static void replace_substring(std::string& s, const std::string& f,
+ const std::string& t)
{
- string_t result;
- std::generate_n(std::back_inserter(result), len, [this]()
- {
- get();
- unexpect_eof();
- return static_cast<char>(current);
- });
- return result;
+ assert(not f.empty());
+ for (auto pos = s.find(f); // find first occurrence of f
+ pos != std::string::npos; // make sure f was found
+ s.replace(pos, f.size(), t), // replace with t, and
+ pos = s.find(f, pos + t.size())) // find next occurrence of f
+ {}
}
- /*!
- @brief reads a CBOR string
+ /// escape "~" to "~0" and "/" to "~1"
+ static std::string escape(std::string s)
+ {
+ replace_substring(s, "~", "~0");
+ replace_substring(s, "/", "~1");
+ return s;
+ }
- This function first reads starting bytes to determine the expected
- string length and then copies this number of bytes into a string.
- Additionally, CBOR's strings with indefinite lengths are supported.
+ /// unescape "~1" to tilde and "~0" to slash (order is important!)
+ static void unescape(std::string& s)
+ {
+ replace_substring(s, "~1", "/");
+ replace_substring(s, "~0", "~");
+ }
- @return string
+ /*!
+ @param[in] reference_string the reference string to the current value
+ @param[in] value the value to consider
+ @param[in,out] result the result object to insert values to
- @throw parse_error.110 if input ended
- @throw parse_error.113 if an unexpected byte is read
+ @note Empty objects or arrays are flattened to `null`.
*/
- string_t get_cbor_string()
+ static void flatten(const std::string& reference_string,
+ const BasicJsonType& value,
+ BasicJsonType& result)
{
- unexpect_eof();
-
- switch (current)
+ switch (value.type())
{
- // UTF-8 string (0x00..0x17 bytes follow)
- case 0x60:
- case 0x61:
- case 0x62:
- case 0x63:
- case 0x64:
- case 0x65:
- case 0x66:
- case 0x67:
- case 0x68:
- case 0x69:
- case 0x6A:
- case 0x6B:
- case 0x6C:
- case 0x6D:
- case 0x6E:
- case 0x6F:
- case 0x70:
- case 0x71:
- case 0x72:
- case 0x73:
- case 0x74:
- case 0x75:
- case 0x76:
- case 0x77:
+ case detail::value_t::array:
{
- return get_string(current & 0x1F);
+ if (value.m_value.array->empty())
+ {
+ // flatten empty array as null
+ result[reference_string] = nullptr;
+ }
+ else
+ {
+ // iterate array and use index as reference string
+ for (std::size_t i = 0; i < value.m_value.array->size(); ++i)
+ {
+ flatten(reference_string + "/" + std::to_string(i),
+ value.m_value.array->operator[](i), result);
+ }
+ }
+ break;
}
- case 0x78: // UTF-8 string (one-byte uint8_t for n follows)
+ case detail::value_t::object:
{
- return get_string(get_number<uint8_t>());
+ if (value.m_value.object->empty())
+ {
+ // flatten empty object as null
+ result[reference_string] = nullptr;
+ }
+ else
+ {
+ // iterate object and use keys as reference string
+ for (const auto& element : *value.m_value.object)
+ {
+ flatten(reference_string + "/" + escape(element.first), element.second, result);
+ }
+ }
+ break;
}
- case 0x79: // UTF-8 string (two-byte uint16_t for n follow)
+ default:
{
- return get_string(get_number<uint16_t>());
+ // add primitive value with its reference string
+ result[reference_string] = value;
+ break;
}
+ }
+ }
- case 0x7A: // UTF-8 string (four-byte uint32_t for n follow)
- {
- return get_string(get_number<uint32_t>());
- }
+ /*!
+ @param[in] value flattened JSON
- case 0x7B: // UTF-8 string (eight-byte uint64_t for n follow)
- {
- return get_string(get_number<uint64_t>());
- }
+ @return unflattened JSON
+
+ @throw parse_error.109 if array index is not a number
+ @throw type_error.314 if value is not an object
+ @throw type_error.315 if object values are not primitive
+ @throw type_error.313 if value cannot be unflattened
+ */
+ static BasicJsonType
+ unflatten(const BasicJsonType& value)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not value.is_object()))
+ {
+ JSON_THROW(detail::type_error::create(314, "only objects can be unflattened"));
+ }
+
+ BasicJsonType result;
- case 0x7F: // UTF-8 string (indefinite length)
+ // iterate the JSON object values
+ for (const auto& element : *value.m_value.object)
+ {
+ if (JSON_HEDLEY_UNLIKELY(not element.second.is_primitive()))
{
- string_t result;
- while (get() != 0xFF)
- {
- result.append(get_cbor_string());
- }
- return result;
+ JSON_THROW(detail::type_error::create(315, "values in object must be primitive"));
}
- default:
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(113, chars_read, "expected a CBOR string; last byte: 0x" + ss.str()));
- }
+ // assign value to reference pointed to by JSON pointer; Note that if
+ // the JSON pointer is "" (i.e., points to the whole value), function
+ // get_and_create returns a reference to result itself. An assignment
+ // will then create a primitive value.
+ json_pointer(element.first).get_and_create(result) = element.second;
}
- }
- template<typename NumberType>
- BasicJsonType get_cbor_array(const NumberType len)
- {
- BasicJsonType result = value_t::array;
- std::generate_n(std::back_inserter(*result.m_value.array), len, [this]()
- {
- return parse_cbor_internal();
- });
return result;
}
- template<typename NumberType>
- BasicJsonType get_cbor_object(const NumberType len)
+ /*!
+ @brief compares two JSON pointers for equality
+
+ @param[in] lhs JSON pointer to compare
+ @param[in] rhs JSON pointer to compare
+ @return whether @a lhs is equal to @a rhs
+
+ @complexity Linear in the length of the JSON pointer
+
+ @exceptionsafety No-throw guarantee: this function never throws exceptions.
+ */
+ friend bool operator==(json_pointer const& lhs,
+ json_pointer const& rhs) noexcept
{
- BasicJsonType result = value_t::object;
- std::generate_n(std::inserter(*result.m_value.object,
- result.m_value.object->end()),
- len, [this]()
- {
- get();
- auto key = get_cbor_string();
- auto val = parse_cbor_internal();
- return std::make_pair(std::move(key), std::move(val));
- });
- return result;
+ return lhs.reference_tokens == rhs.reference_tokens;
}
/*!
- @brief reads a MessagePack string
+ @brief compares two JSON pointers for inequality
- This function first reads starting bytes to determine the expected
- string length and then copies this number of bytes into a string.
+ @param[in] lhs JSON pointer to compare
+ @param[in] rhs JSON pointer to compare
+ @return whether @a lhs is not equal @a rhs
- @return string
+ @complexity Linear in the length of the JSON pointer
- @throw parse_error.110 if input ended
- @throw parse_error.113 if an unexpected byte is read
+ @exceptionsafety No-throw guarantee: this function never throws exceptions.
*/
- string_t get_msgpack_string()
+ friend bool operator!=(json_pointer const& lhs,
+ json_pointer const& rhs) noexcept
{
- unexpect_eof();
+ return not (lhs == rhs);
+ }
- switch (current)
- {
- // fixstr
- case 0xA0:
- case 0xA1:
- case 0xA2:
- case 0xA3:
- case 0xA4:
- case 0xA5:
- case 0xA6:
- case 0xA7:
- case 0xA8:
- case 0xA9:
- case 0xAA:
- case 0xAB:
- case 0xAC:
- case 0xAD:
- case 0xAE:
- case 0xAF:
- case 0xB0:
- case 0xB1:
- case 0xB2:
- case 0xB3:
- case 0xB4:
- case 0xB5:
- case 0xB6:
- case 0xB7:
- case 0xB8:
- case 0xB9:
- case 0xBA:
- case 0xBB:
- case 0xBC:
- case 0xBD:
- case 0xBE:
- case 0xBF:
- {
- return get_string(current & 0x1F);
- }
+ /// the reference tokens
+ std::vector<std::string> reference_tokens;
+};
+} // namespace nlohmann
- case 0xD9: // str 8
- {
- return get_string(get_number<uint8_t>());
- }
+// #include <nlohmann/detail/json_ref.hpp>
- case 0xDA: // str 16
- {
- return get_string(get_number<uint16_t>());
- }
- case 0xDB: // str 32
- {
- return get_string(get_number<uint32_t>());
- }
+#include <initializer_list>
+#include <utility>
- default:
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(113, chars_read,
- "expected a MessagePack string; last byte: 0x" + ss.str()));
- }
- }
- }
+// #include <nlohmann/detail/meta/type_traits.hpp>
- template<typename NumberType>
- BasicJsonType get_msgpack_array(const NumberType len)
- {
- BasicJsonType result = value_t::array;
- std::generate_n(std::back_inserter(*result.m_value.array), len, [this]()
- {
- return parse_msgpack_internal();
- });
- return result;
- }
- template<typename NumberType>
- BasicJsonType get_msgpack_object(const NumberType len)
- {
- BasicJsonType result = value_t::object;
- std::generate_n(std::inserter(*result.m_value.object,
- result.m_value.object->end()),
- len, [this]()
- {
- get();
- auto key = get_msgpack_string();
- auto val = parse_msgpack_internal();
- return std::make_pair(std::move(key), std::move(val));
- });
- return result;
- }
+namespace nlohmann
+{
+namespace detail
+{
+template<typename BasicJsonType>
+class json_ref
+{
+ public:
+ using value_type = BasicJsonType;
- /*!
- @brief reads a UBJSON string
+ json_ref(value_type&& value)
+ : owned_value(std::move(value)), value_ref(&owned_value), is_rvalue(true)
+ {}
- This function is either called after reading the 'S' byte explicitly
- indicating a string, or in case of an object key where the 'S' byte can be
- left out.
+ json_ref(const value_type& value)
+ : value_ref(const_cast<value_type*>(&value)), is_rvalue(false)
+ {}
- @param[in] get_char whether a new character should be retrieved from the
- input (true, default) or whether the last read
- character should be considered instead
+ json_ref(std::initializer_list<json_ref> init)
+ : owned_value(init), value_ref(&owned_value), is_rvalue(true)
+ {}
- @return string
+ template <
+ class... Args,
+ enable_if_t<std::is_constructible<value_type, Args...>::value, int> = 0 >
+ json_ref(Args && ... args)
+ : owned_value(std::forward<Args>(args)...), value_ref(&owned_value),
+ is_rvalue(true) {}
- @throw parse_error.110 if input ended
- @throw parse_error.113 if an unexpected byte is read
- */
- string_t get_ubjson_string(const bool get_char = true)
+ // class should be movable only
+ json_ref(json_ref&&) = default;
+ json_ref(const json_ref&) = delete;
+ json_ref& operator=(const json_ref&) = delete;
+ json_ref& operator=(json_ref&&) = delete;
+ ~json_ref() = default;
+
+ value_type moved_or_copied() const
{
- if (get_char)
+ if (is_rvalue)
{
- get(); // TODO: may we ignore N here?
+ return std::move(*value_ref);
}
+ return *value_ref;
+ }
- unexpect_eof();
+ value_type const& operator*() const
+ {
+ return *static_cast<value_type const*>(value_ref);
+ }
- switch (current)
- {
- case 'U':
- return get_string(get_number<uint8_t>());
- case 'i':
- return get_string(get_number<int8_t>());
- case 'I':
- return get_string(get_number<int16_t>());
- case 'l':
- return get_string(get_number<int32_t>());
- case 'L':
- return get_string(get_number<int64_t>());
- default:
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(113, chars_read,
- "expected a UBJSON string; last byte: 0x" + ss.str()));
- }
+ value_type const* operator->() const
+ {
+ return static_cast<value_type const*>(value_ref);
}
- /*!
- @brief determine the type and size for a container
+ private:
+ mutable value_type owned_value = nullptr;
+ value_type* value_ref = nullptr;
+ const bool is_rvalue;
+};
+} // namespace detail
+} // namespace nlohmann
- In the optimized UBJSON format, a type and a size can be provided to allow
- for a more compact representation.
+// #include <nlohmann/detail/macro_scope.hpp>
- @return pair of the size and the type
- */
- std::pair<std::size_t, int> get_ubjson_size_type()
- {
- std::size_t sz = string_t::npos;
- int tc = 0;
+// #include <nlohmann/detail/meta/cpp_future.hpp>
- get_ignore_noop();
+// #include <nlohmann/detail/meta/type_traits.hpp>
- if (current == '$')
- {
- tc = get(); // must not ignore 'N', because 'N' maybe the type
- unexpect_eof();
+// #include <nlohmann/detail/output/binary_writer.hpp>
- get_ignore_noop();
- if (current != '#')
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(112, chars_read,
- "expected '#' after UBJSON type information; last byte: 0x" + ss.str()));
- }
- sz = parse_ubjson_internal();
- }
- else if (current == '#')
- {
- sz = parse_ubjson_internal();
- }
- return std::make_pair(sz, tc);
- }
+#include <algorithm> // reverse
+#include <array> // array
+#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
+#include <cstring> // memcpy
+#include <limits> // numeric_limits
+#include <string> // string
+#include <cmath> // isnan, isinf
- BasicJsonType get_ubjson_value(const int prefix)
- {
- switch (prefix)
- {
- case std::char_traits<char>::eof(): // EOF
- JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
+// #include <nlohmann/detail/input/binary_reader.hpp>
- case 'T': // true
- return true;
- case 'F': // false
- return false;
+// #include <nlohmann/detail/macro_scope.hpp>
- case 'Z': // null
- return nullptr;
+// #include <nlohmann/detail/output/output_adapters.hpp>
- case 'U':
- return get_number<uint8_t>();
- case 'i':
- return get_number<int8_t>();
- case 'I':
- return get_number<int16_t>();
- case 'l':
- return get_number<int32_t>();
- case 'L':
- return get_number<int64_t>();
- case 'd':
- return get_number<float>();
- case 'D':
- return get_number<double>();
- case 'C': // char
- {
- get();
- unexpect_eof();
- if (JSON_UNLIKELY(current > 127))
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(113, chars_read,
- "byte after 'C' must be in range 0x00..0x7F; last byte: 0x" + ss.str()));
- }
- return string_t(1, static_cast<char>(current));
- }
+#include <algorithm> // copy
+#include <cstddef> // size_t
+#include <ios> // streamsize
+#include <iterator> // back_inserter
+#include <memory> // shared_ptr, make_shared
+#include <ostream> // basic_ostream
+#include <string> // basic_string
+#include <vector> // vector
+// #include <nlohmann/detail/macro_scope.hpp>
- case 'S': // string
- return get_ubjson_string();
- case '[': // array
- return get_ubjson_array();
+namespace nlohmann
+{
+namespace detail
+{
+/// abstract output adapter interface
+template<typename CharType> struct output_adapter_protocol
+{
+ virtual void write_character(CharType c) = 0;
+ virtual void write_characters(const CharType* s, std::size_t length) = 0;
+ virtual ~output_adapter_protocol() = default;
+};
- case '{': // object
- return get_ubjson_object();
+/// a type to simplify interfaces
+template<typename CharType>
+using output_adapter_t = std::shared_ptr<output_adapter_protocol<CharType>>;
- default: // anything else
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << current;
- JSON_THROW(parse_error::create(112, chars_read,
- "error reading UBJSON; last byte: 0x" + ss.str()));
- }
+/// output adapter for byte vectors
+template<typename CharType>
+class output_vector_adapter : public output_adapter_protocol<CharType>
+{
+ public:
+ explicit output_vector_adapter(std::vector<CharType>& vec) noexcept
+ : v(vec)
+ {}
+
+ void write_character(CharType c) override
+ {
+ v.push_back(c);
}
- BasicJsonType get_ubjson_array()
+ JSON_HEDLEY_NON_NULL(2)
+ void write_characters(const CharType* s, std::size_t length) override
{
- BasicJsonType result = value_t::array;
- const auto size_and_type = get_ubjson_size_type();
+ std::copy(s, s + length, std::back_inserter(v));
+ }
- if (size_and_type.first != string_t::npos)
- {
- if (JSON_UNLIKELY(size_and_type.first > result.max_size()))
- {
- JSON_THROW(out_of_range::create(408,
- "excessive array size: " + std::to_string(size_and_type.first)));
- }
+ private:
+ std::vector<CharType>& v;
+};
- if (size_and_type.second != 0)
- {
- if (size_and_type.second != 'N')
- {
- std::generate_n(std::back_inserter(*result.m_value.array),
- size_and_type.first, [this, size_and_type]()
- {
- return get_ubjson_value(size_and_type.second);
- });
- }
- }
- else
- {
- std::generate_n(std::back_inserter(*result.m_value.array),
- size_and_type.first, [this]()
- {
- return parse_ubjson_internal();
- });
- }
- }
- else
- {
- while (current != ']')
- {
- result.push_back(parse_ubjson_internal(false));
- get_ignore_noop();
- }
- }
+/// output adapter for output streams
+template<typename CharType>
+class output_stream_adapter : public output_adapter_protocol<CharType>
+{
+ public:
+ explicit output_stream_adapter(std::basic_ostream<CharType>& s) noexcept
+ : stream(s)
+ {}
- return result;
+ void write_character(CharType c) override
+ {
+ stream.put(c);
}
- BasicJsonType get_ubjson_object()
+ JSON_HEDLEY_NON_NULL(2)
+ void write_characters(const CharType* s, std::size_t length) override
{
- BasicJsonType result = value_t::object;
- const auto size_and_type = get_ubjson_size_type();
-
- if (size_and_type.first != string_t::npos)
- {
- if (JSON_UNLIKELY(size_and_type.first > result.max_size()))
- {
- JSON_THROW(out_of_range::create(408,
- "excessive object size: " + std::to_string(size_and_type.first)));
- }
+ stream.write(s, static_cast<std::streamsize>(length));
+ }
- if (size_and_type.second != 0)
- {
- std::generate_n(std::inserter(*result.m_value.object,
- result.m_value.object->end()),
- size_and_type.first, [this, size_and_type]()
- {
- auto key = get_ubjson_string();
- auto val = get_ubjson_value(size_and_type.second);
- return std::make_pair(std::move(key), std::move(val));
- });
- }
- else
- {
- std::generate_n(std::inserter(*result.m_value.object,
- result.m_value.object->end()),
- size_and_type.first, [this]()
- {
- auto key = get_ubjson_string();
- auto val = parse_ubjson_internal();
- return std::make_pair(std::move(key), std::move(val));
- });
- }
- }
- else
- {
- while (current != '}')
- {
- auto key = get_ubjson_string(false);
- result[std::move(key)] = parse_ubjson_internal();
- get_ignore_noop();
- }
- }
+ private:
+ std::basic_ostream<CharType>& stream;
+};
- return result;
- }
+/// output adapter for basic_string
+template<typename CharType, typename StringType = std::basic_string<CharType>>
+class output_string_adapter : public output_adapter_protocol<CharType>
+{
+ public:
+ explicit output_string_adapter(StringType& s) noexcept
+ : str(s)
+ {}
- /*!
- @brief throw if end of input is not reached
- @throw parse_error.110 if input not ended
- */
- void expect_eof() const
+ void write_character(CharType c) override
{
- if (JSON_UNLIKELY(current != std::char_traits<char>::eof()))
- {
- JSON_THROW(parse_error::create(110, chars_read, "expected end of input"));
- }
+ str.push_back(c);
}
- /*!
- @briefthrow if end of input is reached
- @throw parse_error.110 if input ended
- */
- void unexpect_eof() const
+ JSON_HEDLEY_NON_NULL(2)
+ void write_characters(const CharType* s, std::size_t length) override
{
- if (JSON_UNLIKELY(current == std::char_traits<char>::eof()))
- {
- JSON_THROW(parse_error::create(110, chars_read, "unexpected end of input"));
- }
+ str.append(s, length);
}
private:
- /// input adapter
- input_adapter_t ia = nullptr;
-
- /// the current character
- int current = std::char_traits<char>::eof();
-
- /// the number of characters read
- std::size_t chars_read = 0;
-
- /// whether we can assume little endianess
- const bool is_little_endian = little_endianess();
+ StringType& str;
};
-}
-}
-// #include <nlohmann/detail/output/binary_writer.hpp>
+template<typename CharType, typename StringType = std::basic_string<CharType>>
+class output_adapter
+{
+ public:
+ output_adapter(std::vector<CharType>& vec)
+ : oa(std::make_shared<output_vector_adapter<CharType>>(vec)) {}
+ output_adapter(std::basic_ostream<CharType>& s)
+ : oa(std::make_shared<output_stream_adapter<CharType>>(s)) {}
-#include <algorithm> // reverse
-#include <array> // array
-#include <cstdint> // uint8_t, uint16_t, uint32_t, uint64_t
-#include <cstring> // memcpy
-#include <limits> // numeric_limits
+ output_adapter(StringType& s)
+ : oa(std::make_shared<output_string_adapter<CharType, StringType>>(s)) {}
-// #include <nlohmann/detail/input/binary_reader.hpp>
+ operator output_adapter_t<CharType>()
+ {
+ return oa;
+ }
-// #include <nlohmann/detail/output/output_adapters.hpp>
+ private:
+ output_adapter_t<CharType> oa = nullptr;
+};
+} // namespace detail
+} // namespace nlohmann
namespace nlohmann
@@ -6231,6 +12236,9 @@ namespace detail
template<typename BasicJsonType, typename CharType>
class binary_writer
{
+ using string_t = typename BasicJsonType::string_t;
+ using binary_t = typename BasicJsonType::binary_t;
+
public:
/*!
@brief create a binary writer
@@ -6243,7 +12251,28 @@ class binary_writer
}
/*!
- @brief[in] j JSON value to serialize
+ @param[in] j JSON value to serialize
+ @pre j.type() == value_t::object
+ */
+ void write_bson(const BasicJsonType& j)
+ {
+ switch (j.type())
+ {
+ case value_t::object:
+ {
+ write_bson_object(*j.m_value.object);
+ break;
+ }
+
+ default:
+ {
+ JSON_THROW(type_error::create(317, "to serialize to BSON, top-level type must be object, but is " + std::string(j.type_name())));
+ }
+ }
+ }
+
+ /*!
+ @param[in] j JSON value to serialize
*/
void write_cbor(const BasicJsonType& j)
{
@@ -6251,15 +12280,15 @@ class binary_writer
{
case value_t::null:
{
- oa->write_character(static_cast<CharType>(0xF6));
+ oa->write_character(to_char_type(0xF6));
break;
}
case value_t::boolean:
{
oa->write_character(j.m_value.boolean
- ? static_cast<CharType>(0xF5)
- : static_cast<CharType>(0xF4));
+ ? to_char_type(0xF5)
+ : to_char_type(0xF4));
break;
}
@@ -6272,27 +12301,27 @@ class binary_writer
// code from the value_t::number_unsigned case here.
if (j.m_value.number_integer <= 0x17)
{
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer <= (std::numeric_limits<uint8_t>::max)())
+ else if (j.m_value.number_integer <= (std::numeric_limits<std::uint8_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x18));
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0x18));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer <= (std::numeric_limits<uint16_t>::max)())
+ else if (j.m_value.number_integer <= (std::numeric_limits<std::uint16_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x19));
- write_number(static_cast<uint16_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0x19));
+ write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer <= (std::numeric_limits<uint32_t>::max)())
+ else if (j.m_value.number_integer <= (std::numeric_limits<std::uint32_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x1A));
- write_number(static_cast<uint32_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0x1A));
+ write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
}
else
{
- oa->write_character(static_cast<CharType>(0x1B));
- write_number(static_cast<uint64_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0x1B));
+ write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
}
}
else
@@ -6302,27 +12331,27 @@ class binary_writer
const auto positive_number = -1 - j.m_value.number_integer;
if (j.m_value.number_integer >= -24)
{
- write_number(static_cast<uint8_t>(0x20 + positive_number));
+ write_number(static_cast<std::uint8_t>(0x20 + positive_number));
}
- else if (positive_number <= (std::numeric_limits<uint8_t>::max)())
+ else if (positive_number <= (std::numeric_limits<std::uint8_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x38));
- write_number(static_cast<uint8_t>(positive_number));
+ oa->write_character(to_char_type(0x38));
+ write_number(static_cast<std::uint8_t>(positive_number));
}
- else if (positive_number <= (std::numeric_limits<uint16_t>::max)())
+ else if (positive_number <= (std::numeric_limits<std::uint16_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x39));
- write_number(static_cast<uint16_t>(positive_number));
+ oa->write_character(to_char_type(0x39));
+ write_number(static_cast<std::uint16_t>(positive_number));
}
- else if (positive_number <= (std::numeric_limits<uint32_t>::max)())
+ else if (positive_number <= (std::numeric_limits<std::uint32_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x3A));
- write_number(static_cast<uint32_t>(positive_number));
+ oa->write_character(to_char_type(0x3A));
+ write_number(static_cast<std::uint32_t>(positive_number));
}
else
{
- oa->write_character(static_cast<CharType>(0x3B));
- write_number(static_cast<uint64_t>(positive_number));
+ oa->write_character(to_char_type(0x3B));
+ write_number(static_cast<std::uint64_t>(positive_number));
}
}
break;
@@ -6332,35 +12361,62 @@ class binary_writer
{
if (j.m_value.number_unsigned <= 0x17)
{
- write_number(static_cast<uint8_t>(j.m_value.number_unsigned));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_unsigned));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x18));
- write_number(static_cast<uint8_t>(j.m_value.number_unsigned));
+ oa->write_character(to_char_type(0x18));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_unsigned));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint16_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x19));
- write_number(static_cast<uint16_t>(j.m_value.number_unsigned));
+ oa->write_character(to_char_type(0x19));
+ write_number(static_cast<std::uint16_t>(j.m_value.number_unsigned));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint32_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x1A));
- write_number(static_cast<uint32_t>(j.m_value.number_unsigned));
+ oa->write_character(to_char_type(0x1A));
+ write_number(static_cast<std::uint32_t>(j.m_value.number_unsigned));
}
else
{
- oa->write_character(static_cast<CharType>(0x1B));
- write_number(static_cast<uint64_t>(j.m_value.number_unsigned));
+ oa->write_character(to_char_type(0x1B));
+ write_number(static_cast<std::uint64_t>(j.m_value.number_unsigned));
}
break;
}
- case value_t::number_float: // Double-Precision Float
+ case value_t::number_float:
{
- oa->write_character(static_cast<CharType>(0xFB));
- write_number(j.m_value.number_float);
+ if (std::isnan(j.m_value.number_float))
+ {
+ // NaN is 0xf97e00 in CBOR
+ oa->write_character(to_char_type(0xF9));
+ oa->write_character(to_char_type(0x7E));
+ oa->write_character(to_char_type(0x00));
+ }
+ else if (std::isinf(j.m_value.number_float))
+ {
+ // Infinity is 0xf97c00, -Infinity is 0xf9fc00
+ oa->write_character(to_char_type(0xf9));
+ oa->write_character(j.m_value.number_float > 0 ? to_char_type(0x7C) : to_char_type(0xFC));
+ oa->write_character(to_char_type(0x00));
+ }
+ else
+ {
+ if (static_cast<double>(j.m_value.number_float) >= static_cast<double>(std::numeric_limits<float>::lowest()) and
+ static_cast<double>(j.m_value.number_float) <= static_cast<double>((std::numeric_limits<float>::max)()) and
+ static_cast<double>(static_cast<float>(j.m_value.number_float)) == static_cast<double>(j.m_value.number_float))
+ {
+ oa->write_character(get_cbor_float_prefix(static_cast<float>(j.m_value.number_float)));
+ write_number(static_cast<float>(j.m_value.number_float));
+ }
+ else
+ {
+ oa->write_character(get_cbor_float_prefix(j.m_value.number_float));
+ write_number(j.m_value.number_float);
+ }
+ }
break;
}
@@ -6370,28 +12426,28 @@ class binary_writer
const auto N = j.m_value.string->size();
if (N <= 0x17)
{
- write_number(static_cast<uint8_t>(0x60 + N));
+ write_number(static_cast<std::uint8_t>(0x60 + N));
}
- else if (N <= (std::numeric_limits<uint8_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x78));
- write_number(static_cast<uint8_t>(N));
+ oa->write_character(to_char_type(0x78));
+ write_number(static_cast<std::uint8_t>(N));
}
- else if (N <= (std::numeric_limits<uint16_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x79));
- write_number(static_cast<uint16_t>(N));
+ oa->write_character(to_char_type(0x79));
+ write_number(static_cast<std::uint16_t>(N));
}
- else if (N <= (std::numeric_limits<uint32_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x7A));
- write_number(static_cast<uint32_t>(N));
+ oa->write_character(to_char_type(0x7A));
+ write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
- else if (N <= (std::numeric_limits<uint64_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x7B));
- write_number(static_cast<uint64_t>(N));
+ oa->write_character(to_char_type(0x7B));
+ write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
@@ -6408,28 +12464,28 @@ class binary_writer
const auto N = j.m_value.array->size();
if (N <= 0x17)
{
- write_number(static_cast<uint8_t>(0x80 + N));
+ write_number(static_cast<std::uint8_t>(0x80 + N));
}
- else if (N <= (std::numeric_limits<uint8_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x98));
- write_number(static_cast<uint8_t>(N));
+ oa->write_character(to_char_type(0x98));
+ write_number(static_cast<std::uint8_t>(N));
}
- else if (N <= (std::numeric_limits<uint16_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x99));
- write_number(static_cast<uint16_t>(N));
+ oa->write_character(to_char_type(0x99));
+ write_number(static_cast<std::uint16_t>(N));
}
- else if (N <= (std::numeric_limits<uint32_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x9A));
- write_number(static_cast<uint32_t>(N));
+ oa->write_character(to_char_type(0x9A));
+ write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
- else if (N <= (std::numeric_limits<uint64_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
- oa->write_character(static_cast<CharType>(0x9B));
- write_number(static_cast<uint64_t>(N));
+ oa->write_character(to_char_type(0x9B));
+ write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
@@ -6441,34 +12497,73 @@ class binary_writer
break;
}
+ case value_t::binary:
+ {
+ // step 1: write control byte and the binary array size
+ const auto N = j.m_value.binary->size();
+ if (N <= 0x17)
+ {
+ write_number(static_cast<std::uint8_t>(0x40 + N));
+ }
+ else if (N <= (std::numeric_limits<std::uint8_t>::max)())
+ {
+ oa->write_character(to_char_type(0x58));
+ write_number(static_cast<std::uint8_t>(N));
+ }
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+ {
+ oa->write_character(to_char_type(0x59));
+ write_number(static_cast<std::uint16_t>(N));
+ }
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+ {
+ oa->write_character(to_char_type(0x5A));
+ write_number(static_cast<std::uint32_t>(N));
+ }
+ // LCOV_EXCL_START
+ else if (N <= (std::numeric_limits<std::uint64_t>::max)())
+ {
+ oa->write_character(to_char_type(0x5B));
+ write_number(static_cast<std::uint64_t>(N));
+ }
+ // LCOV_EXCL_STOP
+
+ // step 2: write each element
+ oa->write_characters(
+ reinterpret_cast<const CharType*>(j.m_value.binary->data()),
+ N);
+
+ break;
+ }
+
case value_t::object:
{
// step 1: write control byte and the object size
const auto N = j.m_value.object->size();
if (N <= 0x17)
{
- write_number(static_cast<uint8_t>(0xA0 + N));
+ write_number(static_cast<std::uint8_t>(0xA0 + N));
}
- else if (N <= (std::numeric_limits<uint8_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
- oa->write_character(static_cast<CharType>(0xB8));
- write_number(static_cast<uint8_t>(N));
+ oa->write_character(to_char_type(0xB8));
+ write_number(static_cast<std::uint8_t>(N));
}
- else if (N <= (std::numeric_limits<uint16_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
- oa->write_character(static_cast<CharType>(0xB9));
- write_number(static_cast<uint16_t>(N));
+ oa->write_character(to_char_type(0xB9));
+ write_number(static_cast<std::uint16_t>(N));
}
- else if (N <= (std::numeric_limits<uint32_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
- oa->write_character(static_cast<CharType>(0xBA));
- write_number(static_cast<uint32_t>(N));
+ oa->write_character(to_char_type(0xBA));
+ write_number(static_cast<std::uint32_t>(N));
}
// LCOV_EXCL_START
- else if (N <= (std::numeric_limits<uint64_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint64_t>::max)())
{
- oa->write_character(static_cast<CharType>(0xBB));
- write_number(static_cast<uint64_t>(N));
+ oa->write_character(to_char_type(0xBB));
+ write_number(static_cast<std::uint64_t>(N));
}
// LCOV_EXCL_STOP
@@ -6487,7 +12582,7 @@ class binary_writer
}
/*!
- @brief[in] j JSON value to serialize
+ @param[in] j JSON value to serialize
*/
void write_msgpack(const BasicJsonType& j)
{
@@ -6495,15 +12590,15 @@ class binary_writer
{
case value_t::null: // nil
{
- oa->write_character(static_cast<CharType>(0xC0));
+ oa->write_character(to_char_type(0xC0));
break;
}
case value_t::boolean: // true and false
{
oa->write_character(j.m_value.boolean
- ? static_cast<CharType>(0xC3)
- : static_cast<CharType>(0xC2));
+ ? to_char_type(0xC3)
+ : to_char_type(0xC2));
break;
}
@@ -6517,31 +12612,31 @@ class binary_writer
if (j.m_value.number_unsigned < 128)
{
// positive fixnum
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
{
// uint 8
- oa->write_character(static_cast<CharType>(0xCC));
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCC));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint16_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
{
// uint 16
- oa->write_character(static_cast<CharType>(0xCD));
- write_number(static_cast<uint16_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCD));
+ write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint32_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
{
// uint 32
- oa->write_character(static_cast<CharType>(0xCE));
- write_number(static_cast<uint32_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCE));
+ write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint64_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint64_t>::max)())
{
// uint 64
- oa->write_character(static_cast<CharType>(0xCF));
- write_number(static_cast<uint64_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCF));
+ write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
}
}
else
@@ -6549,35 +12644,35 @@ class binary_writer
if (j.m_value.number_integer >= -32)
{
// negative fixnum
- write_number(static_cast<int8_t>(j.m_value.number_integer));
+ write_number(static_cast<std::int8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer >= (std::numeric_limits<int8_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int8_t>::max)())
+ else if (j.m_value.number_integer >= (std::numeric_limits<std::int8_t>::min)() and
+ j.m_value.number_integer <= (std::numeric_limits<std::int8_t>::max)())
{
// int 8
- oa->write_character(static_cast<CharType>(0xD0));
- write_number(static_cast<int8_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xD0));
+ write_number(static_cast<std::int8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer >= (std::numeric_limits<int16_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int16_t>::max)())
+ else if (j.m_value.number_integer >= (std::numeric_limits<std::int16_t>::min)() and
+ j.m_value.number_integer <= (std::numeric_limits<std::int16_t>::max)())
{
// int 16
- oa->write_character(static_cast<CharType>(0xD1));
- write_number(static_cast<int16_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xD1));
+ write_number(static_cast<std::int16_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer >= (std::numeric_limits<int32_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int32_t>::max)())
+ else if (j.m_value.number_integer >= (std::numeric_limits<std::int32_t>::min)() and
+ j.m_value.number_integer <= (std::numeric_limits<std::int32_t>::max)())
{
// int 32
- oa->write_character(static_cast<CharType>(0xD2));
- write_number(static_cast<int32_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xD2));
+ write_number(static_cast<std::int32_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_integer >= (std::numeric_limits<int64_t>::min)() and
- j.m_value.number_integer <= (std::numeric_limits<int64_t>::max)())
+ else if (j.m_value.number_integer >= (std::numeric_limits<std::int64_t>::min)() and
+ j.m_value.number_integer <= (std::numeric_limits<std::int64_t>::max)())
{
// int 64
- oa->write_character(static_cast<CharType>(0xD3));
- write_number(static_cast<int64_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xD3));
+ write_number(static_cast<std::int64_t>(j.m_value.number_integer));
}
}
break;
@@ -6588,38 +12683,38 @@ class binary_writer
if (j.m_value.number_unsigned < 128)
{
// positive fixnum
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint8_t>::max)())
{
// uint 8
- oa->write_character(static_cast<CharType>(0xCC));
- write_number(static_cast<uint8_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCC));
+ write_number(static_cast<std::uint8_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint16_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint16_t>::max)())
{
// uint 16
- oa->write_character(static_cast<CharType>(0xCD));
- write_number(static_cast<uint16_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCD));
+ write_number(static_cast<std::uint16_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint32_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint32_t>::max)())
{
// uint 32
- oa->write_character(static_cast<CharType>(0xCE));
- write_number(static_cast<uint32_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCE));
+ write_number(static_cast<std::uint32_t>(j.m_value.number_integer));
}
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint64_t>::max)())
+ else if (j.m_value.number_unsigned <= (std::numeric_limits<std::uint64_t>::max)())
{
// uint 64
- oa->write_character(static_cast<CharType>(0xCF));
- write_number(static_cast<uint64_t>(j.m_value.number_integer));
+ oa->write_character(to_char_type(0xCF));
+ write_number(static_cast<std::uint64_t>(j.m_value.number_integer));
}
break;
}
- case value_t::number_float: // float 64
+ case value_t::number_float:
{
- oa->write_character(static_cast<CharType>(0xCB));
+ oa->write_character(get_msgpack_float_prefix(j.m_value.number_float));
write_number(j.m_value.number_float);
break;
}
@@ -6631,25 +12726,25 @@ class binary_writer
if (N <= 31)
{
// fixstr
- write_number(static_cast<uint8_t>(0xA0 | N));
+ write_number(static_cast<std::uint8_t>(0xA0 | N));
}
- else if (N <= (std::numeric_limits<uint8_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint8_t>::max)())
{
// str 8
- oa->write_character(static_cast<CharType>(0xD9));
- write_number(static_cast<uint8_t>(N));
+ oa->write_character(to_char_type(0xD9));
+ write_number(static_cast<std::uint8_t>(N));
}
- else if (N <= (std::numeric_limits<uint16_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
// str 16
- oa->write_character(static_cast<CharType>(0xDA));
- write_number(static_cast<uint16_t>(N));
+ oa->write_character(to_char_type(0xDA));
+ write_number(static_cast<std::uint16_t>(N));
}
- else if (N <= (std::numeric_limits<uint32_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
// str 32
- oa->write_character(static_cast<CharType>(0xDB));
- write_number(static_cast<uint32_t>(N));
+ oa->write_character(to_char_type(0xDB));
+ write_number(static_cast<std::uint32_t>(N));
}
// step 2: write the string
@@ -6666,19 +12761,19 @@ class binary_writer
if (N <= 15)
{
// fixarray
- write_number(static_cast<uint8_t>(0x90 | N));
+ write_number(static_cast<std::uint8_t>(0x90 | N));
}
- else if (N <= (std::numeric_limits<uint16_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
// array 16
- oa->write_character(static_cast<CharType>(0xDC));
- write_number(static_cast<uint16_t>(N));
+ oa->write_character(to_char_type(0xDC));
+ write_number(static_cast<std::uint16_t>(N));
}
- else if (N <= (std::numeric_limits<uint32_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
// array 32
- oa->write_character(static_cast<CharType>(0xDD));
- write_number(static_cast<uint32_t>(N));
+ oa->write_character(to_char_type(0xDD));
+ write_number(static_cast<std::uint32_t>(N));
}
// step 2: write each element
@@ -6689,6 +12784,101 @@ class binary_writer
break;
}
+ case value_t::binary:
+ {
+ // step 0: determine if the binary type has a set subtype to
+ // determine whether or not to use the ext or fixext types
+ const bool use_ext = j.m_value.binary->has_subtype();
+
+ // step 1: write control byte and the byte string length
+ const auto N = j.m_value.binary->size();
+ if (N <= (std::numeric_limits<std::uint8_t>::max)())
+ {
+ std::uint8_t output_type;
+ bool fixed = true;
+ if (use_ext)
+ {
+ switch (N)
+ {
+ case 1:
+ output_type = 0xD4; // fixext 1
+ break;
+ case 2:
+ output_type = 0xD5; // fixext 2
+ break;
+ case 4:
+ output_type = 0xD6; // fixext 4
+ break;
+ case 8:
+ output_type = 0xD7; // fixext 8
+ break;
+ case 16:
+ output_type = 0xD8; // fixext 16
+ break;
+ default:
+ output_type = 0xC7; // ext 8
+ fixed = false;
+ break;
+ }
+
+ }
+ else
+ {
+ output_type = 0xC4; // bin 8
+ fixed = false;
+ }
+
+ oa->write_character(to_char_type(output_type));
+ if (not fixed)
+ {
+ write_number(static_cast<std::uint8_t>(N));
+ }
+ }
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
+ {
+ std::uint8_t output_type;
+ if (use_ext)
+ {
+ output_type = 0xC8; // ext 16
+ }
+ else
+ {
+ output_type = 0xC5; // bin 16
+ }
+
+ oa->write_character(to_char_type(output_type));
+ write_number(static_cast<std::uint16_t>(N));
+ }
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
+ {
+ std::uint8_t output_type;
+ if (use_ext)
+ {
+ output_type = 0xC9; // ext 32
+ }
+ else
+ {
+ output_type = 0xC6; // bin 32
+ }
+
+ oa->write_character(to_char_type(output_type));
+ write_number(static_cast<std::uint32_t>(N));
+ }
+
+ // step 1.5: if this is an ext type, write the subtype
+ if (use_ext)
+ {
+ write_number(static_cast<std::int8_t>(j.m_value.binary->subtype()));
+ }
+
+ // step 2: write the byte string
+ oa->write_characters(
+ reinterpret_cast<const CharType*>(j.m_value.binary->data()),
+ N);
+
+ break;
+ }
+
case value_t::object:
{
// step 1: write control byte and the object size
@@ -6696,19 +12886,19 @@ class binary_writer
if (N <= 15)
{
// fixmap
- write_number(static_cast<uint8_t>(0x80 | (N & 0xF)));
+ write_number(static_cast<std::uint8_t>(0x80 | (N & 0xF)));
}
- else if (N <= (std::numeric_limits<uint16_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint16_t>::max)())
{
// map 16
- oa->write_character(static_cast<CharType>(0xDE));
- write_number(static_cast<uint16_t>(N));
+ oa->write_character(to_char_type(0xDE));
+ write_number(static_cast<std::uint16_t>(N));
}
- else if (N <= (std::numeric_limits<uint32_t>::max)())
+ else if (N <= (std::numeric_limits<std::uint32_t>::max)())
{
// map 32
- oa->write_character(static_cast<CharType>(0xDF));
- write_number(static_cast<uint32_t>(N));
+ oa->write_character(to_char_type(0xDF));
+ write_number(static_cast<std::uint32_t>(N));
}
// step 2: write each element
@@ -6740,7 +12930,7 @@ class binary_writer
{
if (add_prefix)
{
- oa->write_character(static_cast<CharType>('Z'));
+ oa->write_character(to_char_type('Z'));
}
break;
}
@@ -6748,9 +12938,11 @@ class binary_writer
case value_t::boolean:
{
if (add_prefix)
+ {
oa->write_character(j.m_value.boolean
- ? static_cast<CharType>('T')
- : static_cast<CharType>('F'));
+ ? to_char_type('T')
+ : to_char_type('F'));
+ }
break;
}
@@ -6776,7 +12968,7 @@ class binary_writer
{
if (add_prefix)
{
- oa->write_character(static_cast<CharType>('S'));
+ oa->write_character(to_char_type('S'));
}
write_number_with_ubjson_prefix(j.m_value.string->size(), true);
oa->write_characters(
@@ -6789,14 +12981,14 @@ class binary_writer
{
if (add_prefix)
{
- oa->write_character(static_cast<CharType>('['));
+ oa->write_character(to_char_type('['));
}
bool prefix_required = true;
if (use_type and not j.m_value.array->empty())
{
assert(use_count);
- const char first_prefix = ubjson_prefix(j.front());
+ const CharType first_prefix = ubjson_prefix(j.front());
const bool same_prefix = std::all_of(j.begin() + 1, j.end(),
[this, first_prefix](const BasicJsonType & v)
{
@@ -6806,25 +12998,68 @@ class binary_writer
if (same_prefix)
{
prefix_required = false;
- oa->write_character(static_cast<CharType>('$'));
- oa->write_character(static_cast<CharType>(first_prefix));
+ oa->write_character(to_char_type('$'));
+ oa->write_character(first_prefix);
}
}
if (use_count)
{
- oa->write_character(static_cast<CharType>('#'));
+ oa->write_character(to_char_type('#'));
write_number_with_ubjson_prefix(j.m_value.array->size(), true);
}
for (const auto& el : *j.m_value.array)
{
- write_ubjson(el, use_count, use_type, prefix_required);
+ write_ubjson(el, use_count, use_type, prefix_required);
+ }
+
+ if (not use_count)
+ {
+ oa->write_character(to_char_type(']'));
+ }
+
+ break;
+ }
+
+ case value_t::binary:
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('['));
+ }
+
+ if (use_type and not j.m_value.binary->empty())
+ {
+ assert(use_count);
+ oa->write_character(to_char_type('$'));
+ oa->write_character('U');
+ }
+
+ if (use_count)
+ {
+ oa->write_character(to_char_type('#'));
+ write_number_with_ubjson_prefix(j.m_value.binary->size(), true);
+ }
+
+ if (use_type)
+ {
+ oa->write_characters(
+ reinterpret_cast<const CharType*>(j.m_value.binary->data()),
+ j.m_value.binary->size());
+ }
+ else
+ {
+ for (size_t i = 0; i < j.m_value.binary->size(); ++i)
+ {
+ oa->write_character(to_char_type('U'));
+ oa->write_character(j.m_value.binary->data()[i]);
+ }
}
if (not use_count)
{
- oa->write_character(static_cast<CharType>(']'));
+ oa->write_character(to_char_type(']'));
}
break;
@@ -6834,14 +13069,14 @@ class binary_writer
{
if (add_prefix)
{
- oa->write_character(static_cast<CharType>('{'));
+ oa->write_character(to_char_type('{'));
}
bool prefix_required = true;
if (use_type and not j.m_value.object->empty())
{
assert(use_count);
- const char first_prefix = ubjson_prefix(j.front());
+ const CharType first_prefix = ubjson_prefix(j.front());
const bool same_prefix = std::all_of(j.begin(), j.end(),
[this, first_prefix](const BasicJsonType & v)
{
@@ -6851,14 +13086,14 @@ class binary_writer
if (same_prefix)
{
prefix_required = false;
- oa->write_character(static_cast<CharType>('$'));
- oa->write_character(static_cast<CharType>(first_prefix));
+ oa->write_character(to_char_type('$'));
+ oa->write_character(first_prefix);
}
}
if (use_count)
{
- oa->write_character(static_cast<CharType>('#'));
+ oa->write_character(to_char_type('#'));
write_number_with_ubjson_prefix(j.m_value.object->size(), true);
}
@@ -6873,7 +13108,7 @@ class binary_writer
if (not use_count)
{
- oa->write_character(static_cast<CharType>('}'));
+ oa->write_character(to_char_type('}'));
}
break;
@@ -6885,2798 +13120,2738 @@ class binary_writer
}
private:
- /*
- @brief write a number to output input
-
- @param[in] n number of type @a NumberType
- @tparam NumberType the type of the number
+ //////////
+ // BSON //
+ //////////
- @note This function needs to respect the system's endianess, because bytes
- in CBOR, MessagePack, and UBJSON are stored in network order (big
- endian) and therefore need reordering on little endian systems.
+ /*!
+ @return The size of a BSON document entry header, including the id marker
+ and the entry name size (and its null-terminator).
*/
- template<typename NumberType>
- void write_number(const NumberType n)
- {
- // step 1: write number to array of length NumberType
- std::array<CharType, sizeof(NumberType)> vec;
- std::memcpy(vec.data(), &n, sizeof(NumberType));
-
- // step 2: write array to output (with possible reordering)
- if (is_little_endian)
- {
- // reverse byte order prior to conversion if necessary
- std::reverse(vec.begin(), vec.end());
- }
-
- oa->write_characters(vec.data(), sizeof(NumberType));
- }
-
- // UBJSON: write number (floating point)
- template<typename NumberType, typename std::enable_if<
- std::is_floating_point<NumberType>::value, int>::type = 0>
- void write_number_with_ubjson_prefix(const NumberType n,
- const bool add_prefix)
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('D')); // float64
- }
- write_number(n);
- }
-
- // UBJSON: write number (unsigned integer)
- template<typename NumberType, typename std::enable_if<
- std::is_unsigned<NumberType>::value, int>::type = 0>
- void write_number_with_ubjson_prefix(const NumberType n,
- const bool add_prefix)
+ static std::size_t calc_bson_entry_header_size(const string_t& name)
{
- if (n <= static_cast<uint64_t>((std::numeric_limits<int8_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('i')); // int8
- }
- write_number(static_cast<uint8_t>(n));
- }
- else if (n <= (std::numeric_limits<uint8_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('U')); // uint8
- }
- write_number(static_cast<uint8_t>(n));
- }
- else if (n <= static_cast<uint64_t>((std::numeric_limits<int16_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('I')); // int16
- }
- write_number(static_cast<int16_t>(n));
- }
- else if (n <= static_cast<uint64_t>((std::numeric_limits<int32_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('l')); // int32
- }
- write_number(static_cast<int32_t>(n));
- }
- else if (n <= static_cast<uint64_t>((std::numeric_limits<int64_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('L')); // int64
- }
- write_number(static_cast<int64_t>(n));
- }
- else
+ const auto it = name.find(static_cast<typename string_t::value_type>(0));
+ if (JSON_HEDLEY_UNLIKELY(it != BasicJsonType::string_t::npos))
{
- JSON_THROW(out_of_range::create(407, "number overflow serializing " + std::to_string(n)));
+ JSON_THROW(out_of_range::create(409,
+ "BSON key cannot contain code point U+0000 (at byte " + std::to_string(it) + ")"));
}
- }
- // UBJSON: write number (signed integer)
- template<typename NumberType, typename std::enable_if<
- std::is_signed<NumberType>::value and
- not std::is_floating_point<NumberType>::value, int>::type = 0>
- void write_number_with_ubjson_prefix(const NumberType n,
- const bool add_prefix)
- {
- if ((std::numeric_limits<int8_t>::min)() <= n and n <= (std::numeric_limits<int8_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('i')); // int8
- }
- write_number(static_cast<int8_t>(n));
- }
- else if (static_cast<int64_t>((std::numeric_limits<uint8_t>::min)()) <= n and n <= static_cast<int64_t>((std::numeric_limits<uint8_t>::max)()))
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('U')); // uint8
- }
- write_number(static_cast<uint8_t>(n));
- }
- else if ((std::numeric_limits<int16_t>::min)() <= n and n <= (std::numeric_limits<int16_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('I')); // int16
- }
- write_number(static_cast<int16_t>(n));
- }
- else if ((std::numeric_limits<int32_t>::min)() <= n and n <= (std::numeric_limits<int32_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('l')); // int32
- }
- write_number(static_cast<int32_t>(n));
- }
- else if ((std::numeric_limits<int64_t>::min)() <= n and n <= (std::numeric_limits<int64_t>::max)())
- {
- if (add_prefix)
- {
- oa->write_character(static_cast<CharType>('L')); // int64
- }
- write_number(static_cast<int64_t>(n));
- }
- // LCOV_EXCL_START
- else
- {
- JSON_THROW(out_of_range::create(407, "number overflow serializing " + std::to_string(n)));
- }
- // LCOV_EXCL_STOP
+ return /*id*/ 1ul + name.size() + /*zero-terminator*/1u;
}
/*!
- @brief determine the type prefix of container values
-
- @note This function does not need to be 100% accurate when it comes to
- integer limits. In case a number exceeds the limits of int64_t,
- this will be detected by a later call to function
- write_number_with_ubjson_prefix. Therefore, we return 'L' for any
- value that does not fit the previous limits.
- */
- char ubjson_prefix(const BasicJsonType& j) const noexcept
- {
- switch (j.type())
- {
- case value_t::null:
- return 'Z';
-
- case value_t::boolean:
- return j.m_value.boolean ? 'T' : 'F';
-
- case value_t::number_integer:
- {
- if ((std::numeric_limits<int8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int8_t>::max)())
- {
- return 'i';
- }
- else if ((std::numeric_limits<uint8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<uint8_t>::max)())
- {
- return 'U';
- }
- else if ((std::numeric_limits<int16_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int16_t>::max)())
- {
- return 'I';
- }
- else if ((std::numeric_limits<int32_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<int32_t>::max)())
- {
- return 'l';
- }
- else // no check and assume int64_t (see note above)
- {
- return 'L';
- }
- }
-
- case value_t::number_unsigned:
- {
- if (j.m_value.number_unsigned <= (std::numeric_limits<int8_t>::max)())
- {
- return 'i';
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<uint8_t>::max)())
- {
- return 'U';
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<int16_t>::max)())
- {
- return 'I';
- }
- else if (j.m_value.number_unsigned <= (std::numeric_limits<int32_t>::max)())
- {
- return 'l';
- }
- else // no check and assume int64_t (see note above)
- {
- return 'L';
- }
- }
-
- case value_t::number_float:
- return 'D';
-
- case value_t::string:
- return 'S';
-
- case value_t::array:
- return '[';
-
- case value_t::object:
- return '{';
-
- default: // discarded values
- return 'N';
- }
- }
-
- private:
- /// whether we can assume little endianess
- const bool is_little_endian = binary_reader<BasicJsonType>::little_endianess();
-
- /// the output
- output_adapter_t<CharType> oa = nullptr;
-};
-}
-}
-
-// #include <nlohmann/detail/output/serializer.hpp>
-
-
-#include <algorithm> // reverse, remove, fill, find, none_of
-#include <array> // array
-#include <cassert> // assert
-#include <ciso646> // and, or
-#include <clocale> // localeconv, lconv
-#include <cmath> // labs, isfinite, isnan, signbit
-#include <cstddef> // size_t, ptrdiff_t
-#include <cstdint> // uint8_t
-#include <cstdio> // snprintf
-#include <iomanip> // setfill
-#include <iterator> // next
-#include <limits> // numeric_limits
-#include <string> // string
-#include <sstream> // stringstream
-#include <type_traits> // is_same
-
-// #include <nlohmann/detail/exceptions.hpp>
-
-// #include <nlohmann/detail/conversions/to_chars.hpp>
-
-
-#include <cassert> // assert
-#include <ciso646> // or, and, not
-#include <cmath> // signbit, isfinite
-#include <cstdint> // intN_t, uintN_t
-#include <cstring> // memcpy, memmove
-
-namespace nlohmann
-{
-namespace detail
-{
-
-/*!
-@brief implements the Grisu2 algorithm for binary to decimal floating-point
-conversion.
-
-This implementation is a slightly modified version of the reference
-implementation which may be obtained from
-http://florian.loitsch.com/publications (bench.tar.gz).
-
-The code is distributed under the MIT license, Copyright (c) 2009 Florian Loitsch.
-
-For a detailed description of the algorithm see:
-
-[1] Loitsch, "Printing Floating-Point Numbers Quickly and Accurately with
- Integers", Proceedings of the ACM SIGPLAN 2010 Conference on Programming
- Language Design and Implementation, PLDI 2010
-[2] Burger, Dybvig, "Printing Floating-Point Numbers Quickly and Accurately",
- Proceedings of the ACM SIGPLAN 1996 Conference on Programming Language
- Design and Implementation, PLDI 1996
-*/
-namespace dtoa_impl
-{
-
-template <typename Target, typename Source>
-Target reinterpret_bits(const Source source)
-{
- static_assert(sizeof(Target) == sizeof(Source), "size mismatch");
-
- Target target;
- std::memcpy(&target, &source, sizeof(Source));
- return target;
-}
-
-struct diyfp // f * 2^e
-{
- static constexpr int kPrecision = 64; // = q
-
- uint64_t f;
- int e;
+ @brief Writes the given @a element_type and @a name to the output adapter
+ */
+ void write_bson_entry_header(const string_t& name,
+ const std::uint8_t element_type)
+ {
+ oa->write_character(to_char_type(element_type)); // boolean
+ oa->write_characters(
+ reinterpret_cast<const CharType*>(name.c_str()),
+ name.size() + 1u);
+ }
- constexpr diyfp() noexcept : f(0), e(0) {}
- constexpr diyfp(uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
+ /*!
+ @brief Writes a BSON element with key @a name and boolean value @a value
+ */
+ void write_bson_boolean(const string_t& name,
+ const bool value)
+ {
+ write_bson_entry_header(name, 0x08);
+ oa->write_character(value ? to_char_type(0x01) : to_char_type(0x00));
+ }
/*!
- @brief returns x - y
- @pre x.e == y.e and x.f >= y.f
+ @brief Writes a BSON element with key @a name and double value @a value
*/
- static diyfp sub(const diyfp& x, const diyfp& y) noexcept
+ void write_bson_double(const string_t& name,
+ const double value)
{
- assert(x.e == y.e);
- assert(x.f >= y.f);
+ write_bson_entry_header(name, 0x01);
+ write_number<double, true>(value);
+ }
- return diyfp(x.f - y.f, x.e);
+ /*!
+ @return The size of the BSON-encoded string in @a value
+ */
+ static std::size_t calc_bson_string_size(const string_t& value)
+ {
+ return sizeof(std::int32_t) + value.size() + 1ul;
}
/*!
- @brief returns x * y
- @note The result is rounded. (Only the upper q bits are returned.)
+ @brief Writes a BSON element with key @a name and string value @a value
*/
- static diyfp mul(const diyfp& x, const diyfp& y) noexcept
+ void write_bson_string(const string_t& name,
+ const string_t& value)
{
- static_assert(kPrecision == 64, "internal error");
+ write_bson_entry_header(name, 0x02);
- // Computes:
- // f = round((x.f * y.f) / 2^q)
- // e = x.e + y.e + q
+ write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size() + 1ul));
+ oa->write_characters(
+ reinterpret_cast<const CharType*>(value.c_str()),
+ value.size() + 1);
+ }
- // Emulate the 64-bit * 64-bit multiplication:
- //
- // p = u * v
- // = (u_lo + 2^32 u_hi) (v_lo + 2^32 v_hi)
- // = (u_lo v_lo ) + 2^32 ((u_lo v_hi ) + (u_hi v_lo )) + 2^64 (u_hi v_hi )
- // = (p0 ) + 2^32 ((p1 ) + (p2 )) + 2^64 (p3 )
- // = (p0_lo + 2^32 p0_hi) + 2^32 ((p1_lo + 2^32 p1_hi) + (p2_lo + 2^32 p2_hi)) + 2^64 (p3 )
- // = (p0_lo ) + 2^32 (p0_hi + p1_lo + p2_lo ) + 2^64 (p1_hi + p2_hi + p3)
- // = (p0_lo ) + 2^32 (Q ) + 2^64 (H )
- // = (p0_lo ) + 2^32 (Q_lo + 2^32 Q_hi ) + 2^64 (H )
- //
- // (Since Q might be larger than 2^32 - 1)
- //
- // = (p0_lo + 2^32 Q_lo) + 2^64 (Q_hi + H)
- //
- // (Q_hi + H does not overflow a 64-bit int)
- //
- // = p_lo + 2^64 p_hi
+ /*!
+ @brief Writes a BSON element with key @a name and null value
+ */
+ void write_bson_null(const string_t& name)
+ {
+ write_bson_entry_header(name, 0x0A);
+ }
+
+ /*!
+ @return The size of the BSON-encoded integer @a value
+ */
+ static std::size_t calc_bson_integer_size(const std::int64_t value)
+ {
+ return (std::numeric_limits<std::int32_t>::min)() <= value and value <= (std::numeric_limits<std::int32_t>::max)()
+ ? sizeof(std::int32_t)
+ : sizeof(std::int64_t);
+ }
- const uint64_t u_lo = x.f & 0xFFFFFFFF;
- const uint64_t u_hi = x.f >> 32;
- const uint64_t v_lo = y.f & 0xFFFFFFFF;
- const uint64_t v_hi = y.f >> 32;
+ /*!
+ @brief Writes a BSON element with key @a name and integer @a value
+ */
+ void write_bson_integer(const string_t& name,
+ const std::int64_t value)
+ {
+ if ((std::numeric_limits<std::int32_t>::min)() <= value and value <= (std::numeric_limits<std::int32_t>::max)())
+ {
+ write_bson_entry_header(name, 0x10); // int32
+ write_number<std::int32_t, true>(static_cast<std::int32_t>(value));
+ }
+ else
+ {
+ write_bson_entry_header(name, 0x12); // int64
+ write_number<std::int64_t, true>(static_cast<std::int64_t>(value));
+ }
+ }
- const uint64_t p0 = u_lo * v_lo;
- const uint64_t p1 = u_lo * v_hi;
- const uint64_t p2 = u_hi * v_lo;
- const uint64_t p3 = u_hi * v_hi;
+ /*!
+ @return The size of the BSON-encoded unsigned integer in @a j
+ */
+ static constexpr std::size_t calc_bson_unsigned_size(const std::uint64_t value) noexcept
+ {
+ return (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+ ? sizeof(std::int32_t)
+ : sizeof(std::int64_t);
+ }
- const uint64_t p0_hi = p0 >> 32;
- const uint64_t p1_lo = p1 & 0xFFFFFFFF;
- const uint64_t p1_hi = p1 >> 32;
- const uint64_t p2_lo = p2 & 0xFFFFFFFF;
- const uint64_t p2_hi = p2 >> 32;
+ /*!
+ @brief Writes a BSON element with key @a name and unsigned @a value
+ */
+ void write_bson_unsigned(const string_t& name,
+ const std::uint64_t value)
+ {
+ if (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+ {
+ write_bson_entry_header(name, 0x10 /* int32 */);
+ write_number<std::int32_t, true>(static_cast<std::int32_t>(value));
+ }
+ else if (value <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)()))
+ {
+ write_bson_entry_header(name, 0x12 /* int64 */);
+ write_number<std::int64_t, true>(static_cast<std::int64_t>(value));
+ }
+ else
+ {
+ JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(value) + " cannot be represented by BSON as it does not fit int64"));
+ }
+ }
- uint64_t Q = p0_hi + p1_lo + p2_lo;
+ /*!
+ @brief Writes a BSON element with key @a name and object @a value
+ */
+ void write_bson_object_entry(const string_t& name,
+ const typename BasicJsonType::object_t& value)
+ {
+ write_bson_entry_header(name, 0x03); // object
+ write_bson_object(value);
+ }
- // The full product might now be computed as
- //
- // p_hi = p3 + p2_hi + p1_hi + (Q >> 32)
- // p_lo = p0_lo + (Q << 32)
- //
- // But in this particular case here, the full p_lo is not required.
- // Effectively we only need to add the highest bit in p_lo to p_hi (and
- // Q_hi + 1 does not overflow).
+ /*!
+ @return The size of the BSON-encoded array @a value
+ */
+ static std::size_t calc_bson_array_size(const typename BasicJsonType::array_t& value)
+ {
+ std::size_t array_index = 0ul;
- Q += uint64_t{1} << (64 - 32 - 1); // round, ties up
+ const std::size_t embedded_document_size = std::accumulate(std::begin(value), std::end(value), std::size_t(0), [&array_index](std::size_t result, const typename BasicJsonType::array_t::value_type & el)
+ {
+ return result + calc_bson_element_size(std::to_string(array_index++), el);
+ });
- const uint64_t h = p3 + p2_hi + p1_hi + (Q >> 32);
+ return sizeof(std::int32_t) + embedded_document_size + 1ul;
+ }
- return diyfp(h, x.e + y.e + 64);
+ /*!
+ @return The size of the BSON-encoded binary array @a value
+ */
+ static std::size_t calc_bson_binary_size(const typename BasicJsonType::binary_t& value)
+ {
+ return sizeof(std::int32_t) + value.size() + 1ul;
}
/*!
- @brief normalize x such that the significand is >= 2^(q-1)
- @pre x.f != 0
+ @brief Writes a BSON element with key @a name and array @a value
*/
- static diyfp normalize(diyfp x) noexcept
+ void write_bson_array(const string_t& name,
+ const typename BasicJsonType::array_t& value)
{
- assert(x.f != 0);
+ write_bson_entry_header(name, 0x04); // array
+ write_number<std::int32_t, true>(static_cast<std::int32_t>(calc_bson_array_size(value)));
- while ((x.f >> 63) == 0)
+ std::size_t array_index = 0ul;
+
+ for (const auto& el : value)
{
- x.f <<= 1;
- x.e--;
+ write_bson_element(std::to_string(array_index++), el);
}
- return x;
+ oa->write_character(to_char_type(0x00));
}
/*!
- @brief normalize x such that the result has the exponent E
- @pre e >= x.e and the upper e - x.e bits of x.f must be zero.
+ @brief Writes a BSON element with key @a name and binary value @a value
*/
- static diyfp normalize_to(const diyfp& x, const int target_exponent) noexcept
+ void write_bson_binary(const string_t& name,
+ const binary_t& value)
{
- const int delta = x.e - target_exponent;
+ write_bson_entry_header(name, 0x05);
- assert(delta >= 0);
- assert(((x.f << delta) >> delta) == x.f);
+ write_number<std::int32_t, true>(static_cast<std::int32_t>(value.size()));
+ write_number(value.has_subtype() ? value.subtype() : std::uint8_t(0x00));
- return diyfp(x.f << delta, target_exponent);
+ oa->write_characters(reinterpret_cast<const CharType*>(value.data()), value.size());
}
-};
-struct boundaries
-{
- diyfp w;
- diyfp minus;
- diyfp plus;
-};
+ /*!
+ @brief Calculates the size necessary to serialize the JSON value @a j with its @a name
+ @return The calculated size for the BSON document entry for @a j with the given @a name.
+ */
+ static std::size_t calc_bson_element_size(const string_t& name,
+ const BasicJsonType& j)
+ {
+ const auto header_size = calc_bson_entry_header_size(name);
+ switch (j.type())
+ {
+ case value_t::object:
+ return header_size + calc_bson_object_size(*j.m_value.object);
-/*!
-Compute the (normalized) diyfp representing the input number 'value' and its
-boundaries.
+ case value_t::array:
+ return header_size + calc_bson_array_size(*j.m_value.array);
-@pre value must be finite and positive
-*/
-template <typename FloatType>
-boundaries compute_boundaries(FloatType value)
-{
- assert(std::isfinite(value));
- assert(value > 0);
+ case value_t::binary:
+ return header_size + calc_bson_binary_size(*j.m_value.binary);
- // Convert the IEEE representation into a diyfp.
- //
- // If v is denormal:
- // value = 0.F * 2^(1 - bias) = ( F) * 2^(1 - bias - (p-1))
- // If v is normalized:
- // value = 1.F * 2^(E - bias) = (2^(p-1) + F) * 2^(E - bias - (p-1))
+ case value_t::boolean:
+ return header_size + 1ul;
- static_assert(std::numeric_limits<FloatType>::is_iec559,
- "internal error: dtoa_short requires an IEEE-754 floating-point implementation");
+ case value_t::number_float:
+ return header_size + 8ul;
- constexpr int kPrecision = std::numeric_limits<FloatType>::digits; // = p (includes the hidden bit)
- constexpr int kBias = std::numeric_limits<FloatType>::max_exponent - 1 + (kPrecision - 1);
- constexpr int kMinExp = 1 - kBias;
- constexpr uint64_t kHiddenBit = uint64_t{1} << (kPrecision - 1); // = 2^(p-1)
+ case value_t::number_integer:
+ return header_size + calc_bson_integer_size(j.m_value.number_integer);
- using bits_type = typename std::conditional< kPrecision == 24, uint32_t, uint64_t >::type;
+ case value_t::number_unsigned:
+ return header_size + calc_bson_unsigned_size(j.m_value.number_unsigned);
- const uint64_t bits = reinterpret_bits<bits_type>(value);
- const uint64_t E = bits >> (kPrecision - 1);
- const uint64_t F = bits & (kHiddenBit - 1);
+ case value_t::string:
+ return header_size + calc_bson_string_size(*j.m_value.string);
- const bool is_denormal = (E == 0);
- const diyfp v = is_denormal
- ? diyfp(F, kMinExp)
- : diyfp(F + kHiddenBit, static_cast<int>(E) - kBias);
+ case value_t::null:
+ return header_size + 0ul;
- // Compute the boundaries m- and m+ of the floating-point value
- // v = f * 2^e.
- //
- // Determine v- and v+, the floating-point predecessor and successor if v,
- // respectively.
- //
- // v- = v - 2^e if f != 2^(p-1) or e == e_min (A)
- // = v - 2^(e-1) if f == 2^(p-1) and e > e_min (B)
- //
- // v+ = v + 2^e
- //
- // Let m- = (v- + v) / 2 and m+ = (v + v+) / 2. All real numbers _strictly_
- // between m- and m+ round to v, regardless of how the input rounding
- // algorithm breaks ties.
- //
- // ---+-------------+-------------+-------------+-------------+--- (A)
- // v- m- v m+ v+
- //
- // -----------------+------+------+-------------+-------------+--- (B)
- // v- m- v m+ v+
+ // LCOV_EXCL_START
+ default:
+ assert(false);
+ return 0ul;
+ // LCOV_EXCL_STOP
+ }
+ }
- const bool lower_boundary_is_closer = (F == 0 and E > 1);
- const diyfp m_plus = diyfp(2 * v.f + 1, v.e - 1);
- const diyfp m_minus = lower_boundary_is_closer
- ? diyfp(4 * v.f - 1, v.e - 2) // (B)
- : diyfp(2 * v.f - 1, v.e - 1); // (A)
+ /*!
+ @brief Serializes the JSON value @a j to BSON and associates it with the
+ key @a name.
+ @param name The name to associate with the JSON entity @a j within the
+ current BSON document
+ @return The size of the BSON entry
+ */
+ void write_bson_element(const string_t& name,
+ const BasicJsonType& j)
+ {
+ switch (j.type())
+ {
+ case value_t::object:
+ return write_bson_object_entry(name, *j.m_value.object);
- // Determine the normalized w+ = m+.
- const diyfp w_plus = diyfp::normalize(m_plus);
+ case value_t::array:
+ return write_bson_array(name, *j.m_value.array);
- // Determine w- = m- such that e_(w-) = e_(w+).
- const diyfp w_minus = diyfp::normalize_to(m_minus, w_plus.e);
+ case value_t::binary:
+ return write_bson_binary(name, *j.m_value.binary);
- return {diyfp::normalize(v), w_minus, w_plus};
-}
+ case value_t::boolean:
+ return write_bson_boolean(name, j.m_value.boolean);
-// Given normalized diyfp w, Grisu needs to find a (normalized) cached
-// power-of-ten c, such that the exponent of the product c * w = f * 2^e lies
-// within a certain range [alpha, gamma] (Definition 3.2 from [1])
-//
-// alpha <= e = e_c + e_w + q <= gamma
-//
-// or
-//
-// f_c * f_w * 2^alpha <= f_c 2^(e_c) * f_w 2^(e_w) * 2^q
-// <= f_c * f_w * 2^gamma
-//
-// Since c and w are normalized, i.e. 2^(q-1) <= f < 2^q, this implies
-//
-// 2^(q-1) * 2^(q-1) * 2^alpha <= c * w * 2^q < 2^q * 2^q * 2^gamma
-//
-// or
-//
-// 2^(q - 2 + alpha) <= c * w < 2^(q + gamma)
-//
-// The choice of (alpha,gamma) determines the size of the table and the form of
-// the digit generation procedure. Using (alpha,gamma)=(-60,-32) works out well
-// in practice:
-//
-// The idea is to cut the number c * w = f * 2^e into two parts, which can be
-// processed independently: An integral part p1, and a fractional part p2:
-//
-// f * 2^e = ( (f div 2^-e) * 2^-e + (f mod 2^-e) ) * 2^e
-// = (f div 2^-e) + (f mod 2^-e) * 2^e
-// = p1 + p2 * 2^e
-//
-// The conversion of p1 into decimal form requires a series of divisions and
-// modulos by (a power of) 10. These operations are faster for 32-bit than for
-// 64-bit integers, so p1 should ideally fit into a 32-bit integer. This can be
-// achieved by choosing
-//
-// -e >= 32 or e <= -32 := gamma
-//
-// In order to convert the fractional part
-//
-// p2 * 2^e = p2 / 2^-e = d[-1] / 10^1 + d[-2] / 10^2 + ...
-//
-// into decimal form, the fraction is repeatedly multiplied by 10 and the digits
-// d[-i] are extracted in order:
-//
-// (10 * p2) div 2^-e = d[-1]
-// (10 * p2) mod 2^-e = d[-2] / 10^1 + ...
-//
-// The multiplication by 10 must not overflow. It is sufficient to choose
-//
-// 10 * p2 < 16 * p2 = 2^4 * p2 <= 2^64.
-//
-// Since p2 = f mod 2^-e < 2^-e,
-//
-// -e <= 60 or e >= -60 := alpha
+ case value_t::number_float:
+ return write_bson_double(name, j.m_value.number_float);
+
+ case value_t::number_integer:
+ return write_bson_integer(name, j.m_value.number_integer);
+
+ case value_t::number_unsigned:
+ return write_bson_unsigned(name, j.m_value.number_unsigned);
+
+ case value_t::string:
+ return write_bson_string(name, *j.m_value.string);
-constexpr int kAlpha = -60;
-constexpr int kGamma = -32;
+ case value_t::null:
+ return write_bson_null(name);
-struct cached_power // c = f * 2^e ~= 10^k
-{
- uint64_t f;
- int e;
- int k;
-};
+ // LCOV_EXCL_START
+ default:
+ assert(false);
+ return;
+ // LCOV_EXCL_STOP
+ }
+ }
-/*!
-For a normalized diyfp w = f * 2^e, this function returns a (normalized) cached
-power-of-ten c = f_c * 2^e_c, such that the exponent of the product w * c
-satisfies (Definition 3.2 from [1])
+ /*!
+ @brief Calculates the size of the BSON serialization of the given
+ JSON-object @a j.
+ @param[in] j JSON value to serialize
+ @pre j.type() == value_t::object
+ */
+ static std::size_t calc_bson_object_size(const typename BasicJsonType::object_t& value)
+ {
+ std::size_t document_size = std::accumulate(value.begin(), value.end(), std::size_t(0),
+ [](size_t result, const typename BasicJsonType::object_t::value_type & el)
+ {
+ return result += calc_bson_element_size(el.first, el.second);
+ });
- alpha <= e_c + e + q <= gamma.
-*/
-inline cached_power get_cached_power_for_binary_exponent(int e)
-{
- // Now
- //
- // alpha <= e_c + e + q <= gamma (1)
- // ==> f_c * 2^alpha <= c * 2^e * 2^q
- //
- // and since the c's are normalized, 2^(q-1) <= f_c,
- //
- // ==> 2^(q - 1 + alpha) <= c * 2^(e + q)
- // ==> 2^(alpha - e - 1) <= c
- //
- // If c were an exakt power of ten, i.e. c = 10^k, one may determine k as
- //
- // k = ceil( log_10( 2^(alpha - e - 1) ) )
- // = ceil( (alpha - e - 1) * log_10(2) )
- //
- // From the paper:
- // "In theory the result of the procedure could be wrong since c is rounded,
- // and the computation itself is approximated [...]. In practice, however,
- // this simple function is sufficient."
- //
- // For IEEE double precision floating-point numbers converted into
- // normalized diyfp's w = f * 2^e, with q = 64,
- //
- // e >= -1022 (min IEEE exponent)
- // -52 (p - 1)
- // -52 (p - 1, possibly normalize denormal IEEE numbers)
- // -11 (normalize the diyfp)
- // = -1137
- //
- // and
- //
- // e <= +1023 (max IEEE exponent)
- // -52 (p - 1)
- // -11 (normalize the diyfp)
- // = 960
- //
- // This binary exponent range [-1137,960] results in a decimal exponent
- // range [-307,324]. One does not need to store a cached power for each
- // k in this range. For each such k it suffices to find a cached power
- // such that the exponent of the product lies in [alpha,gamma].
- // This implies that the difference of the decimal exponents of adjacent
- // table entries must be less than or equal to
- //
- // floor( (gamma - alpha) * log_10(2) ) = 8.
- //
- // (A smaller distance gamma-alpha would require a larger table.)
+ return sizeof(std::int32_t) + document_size + 1ul;
+ }
- // NB:
- // Actually this function returns c, such that -60 <= e_c + e + 64 <= -34.
+ /*!
+ @param[in] j JSON value to serialize
+ @pre j.type() == value_t::object
+ */
+ void write_bson_object(const typename BasicJsonType::object_t& value)
+ {
+ write_number<std::int32_t, true>(static_cast<std::int32_t>(calc_bson_object_size(value)));
- constexpr int kCachedPowersSize = 79;
- constexpr int kCachedPowersMinDecExp = -300;
- constexpr int kCachedPowersDecStep = 8;
+ for (const auto& el : value)
+ {
+ write_bson_element(el.first, el.second);
+ }
- static constexpr cached_power kCachedPowers[] =
- {
- { 0xAB70FE17C79AC6CA, -1060, -300 },
- { 0xFF77B1FCBEBCDC4F, -1034, -292 },
- { 0xBE5691EF416BD60C, -1007, -284 },
- { 0x8DD01FAD907FFC3C, -980, -276 },
- { 0xD3515C2831559A83, -954, -268 },
- { 0x9D71AC8FADA6C9B5, -927, -260 },
- { 0xEA9C227723EE8BCB, -901, -252 },
- { 0xAECC49914078536D, -874, -244 },
- { 0x823C12795DB6CE57, -847, -236 },
- { 0xC21094364DFB5637, -821, -228 },
- { 0x9096EA6F3848984F, -794, -220 },
- { 0xD77485CB25823AC7, -768, -212 },
- { 0xA086CFCD97BF97F4, -741, -204 },
- { 0xEF340A98172AACE5, -715, -196 },
- { 0xB23867FB2A35B28E, -688, -188 },
- { 0x84C8D4DFD2C63F3B, -661, -180 },
- { 0xC5DD44271AD3CDBA, -635, -172 },
- { 0x936B9FCEBB25C996, -608, -164 },
- { 0xDBAC6C247D62A584, -582, -156 },
- { 0xA3AB66580D5FDAF6, -555, -148 },
- { 0xF3E2F893DEC3F126, -529, -140 },
- { 0xB5B5ADA8AAFF80B8, -502, -132 },
- { 0x87625F056C7C4A8B, -475, -124 },
- { 0xC9BCFF6034C13053, -449, -116 },
- { 0x964E858C91BA2655, -422, -108 },
- { 0xDFF9772470297EBD, -396, -100 },
- { 0xA6DFBD9FB8E5B88F, -369, -92 },
- { 0xF8A95FCF88747D94, -343, -84 },
- { 0xB94470938FA89BCF, -316, -76 },
- { 0x8A08F0F8BF0F156B, -289, -68 },
- { 0xCDB02555653131B6, -263, -60 },
- { 0x993FE2C6D07B7FAC, -236, -52 },
- { 0xE45C10C42A2B3B06, -210, -44 },
- { 0xAA242499697392D3, -183, -36 },
- { 0xFD87B5F28300CA0E, -157, -28 },
- { 0xBCE5086492111AEB, -130, -20 },
- { 0x8CBCCC096F5088CC, -103, -12 },
- { 0xD1B71758E219652C, -77, -4 },
- { 0x9C40000000000000, -50, 4 },
- { 0xE8D4A51000000000, -24, 12 },
- { 0xAD78EBC5AC620000, 3, 20 },
- { 0x813F3978F8940984, 30, 28 },
- { 0xC097CE7BC90715B3, 56, 36 },
- { 0x8F7E32CE7BEA5C70, 83, 44 },
- { 0xD5D238A4ABE98068, 109, 52 },
- { 0x9F4F2726179A2245, 136, 60 },
- { 0xED63A231D4C4FB27, 162, 68 },
- { 0xB0DE65388CC8ADA8, 189, 76 },
- { 0x83C7088E1AAB65DB, 216, 84 },
- { 0xC45D1DF942711D9A, 242, 92 },
- { 0x924D692CA61BE758, 269, 100 },
- { 0xDA01EE641A708DEA, 295, 108 },
- { 0xA26DA3999AEF774A, 322, 116 },
- { 0xF209787BB47D6B85, 348, 124 },
- { 0xB454E4A179DD1877, 375, 132 },
- { 0x865B86925B9BC5C2, 402, 140 },
- { 0xC83553C5C8965D3D, 428, 148 },
- { 0x952AB45CFA97A0B3, 455, 156 },
- { 0xDE469FBD99A05FE3, 481, 164 },
- { 0xA59BC234DB398C25, 508, 172 },
- { 0xF6C69A72A3989F5C, 534, 180 },
- { 0xB7DCBF5354E9BECE, 561, 188 },
- { 0x88FCF317F22241E2, 588, 196 },
- { 0xCC20CE9BD35C78A5, 614, 204 },
- { 0x98165AF37B2153DF, 641, 212 },
- { 0xE2A0B5DC971F303A, 667, 220 },
- { 0xA8D9D1535CE3B396, 694, 228 },
- { 0xFB9B7CD9A4A7443C, 720, 236 },
- { 0xBB764C4CA7A44410, 747, 244 },
- { 0x8BAB8EEFB6409C1A, 774, 252 },
- { 0xD01FEF10A657842C, 800, 260 },
- { 0x9B10A4E5E9913129, 827, 268 },
- { 0xE7109BFBA19C0C9D, 853, 276 },
- { 0xAC2820D9623BF429, 880, 284 },
- { 0x80444B5E7AA7CF85, 907, 292 },
- { 0xBF21E44003ACDD2D, 933, 300 },
- { 0x8E679C2F5E44FF8F, 960, 308 },
- { 0xD433179D9C8CB841, 986, 316 },
- { 0x9E19DB92B4E31BA9, 1013, 324 },
- };
+ oa->write_character(to_char_type(0x00));
+ }
- // This computation gives exactly the same results for k as
- // k = ceil((kAlpha - e - 1) * 0.30102999566398114)
- // for |e| <= 1500, but doesn't require floating-point operations.
- // NB: log_10(2) ~= 78913 / 2^18
- assert(e >= -1500);
- assert(e <= 1500);
- const int f = kAlpha - e - 1;
- const int k = (f * 78913) / (1 << 18) + (f > 0);
+ //////////
+ // CBOR //
+ //////////
- const int index = (-kCachedPowersMinDecExp + k + (kCachedPowersDecStep - 1)) / kCachedPowersDecStep;
- assert(index >= 0);
- assert(index < kCachedPowersSize);
- static_cast<void>(kCachedPowersSize); // Fix warning.
+ static constexpr CharType get_cbor_float_prefix(float /*unused*/)
+ {
+ return to_char_type(0xFA); // Single-Precision Float
+ }
- const cached_power cached = kCachedPowers[index];
- assert(kAlpha <= cached.e + e + 64);
- assert(kGamma >= cached.e + e + 64);
+ static constexpr CharType get_cbor_float_prefix(double /*unused*/)
+ {
+ return to_char_type(0xFB); // Double-Precision Float
+ }
- return cached;
-}
+ /////////////
+ // MsgPack //
+ /////////////
+
+ static constexpr CharType get_msgpack_float_prefix(float /*unused*/)
+ {
+ return to_char_type(0xCA); // float 32
+ }
+
+ static constexpr CharType get_msgpack_float_prefix(double /*unused*/)
+ {
+ return to_char_type(0xCB); // float 64
+ }
+
+ ////////////
+ // UBJSON //
+ ////////////
+
+ // UBJSON: write number (floating point)
+ template<typename NumberType, typename std::enable_if<
+ std::is_floating_point<NumberType>::value, int>::type = 0>
+ void write_number_with_ubjson_prefix(const NumberType n,
+ const bool add_prefix)
+ {
+ if (add_prefix)
+ {
+ oa->write_character(get_ubjson_float_prefix(n));
+ }
+ write_number(n);
+ }
+
+ // UBJSON: write number (unsigned integer)
+ template<typename NumberType, typename std::enable_if<
+ std::is_unsigned<NumberType>::value, int>::type = 0>
+ void write_number_with_ubjson_prefix(const NumberType n,
+ const bool add_prefix)
+ {
+ if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int8_t>::max)()))
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('i')); // int8
+ }
+ write_number(static_cast<std::uint8_t>(n));
+ }
+ else if (n <= (std::numeric_limits<std::uint8_t>::max)())
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('U')); // uint8
+ }
+ write_number(static_cast<std::uint8_t>(n));
+ }
+ else if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int16_t>::max)()))
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('I')); // int16
+ }
+ write_number(static_cast<std::int16_t>(n));
+ }
+ else if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('l')); // int32
+ }
+ write_number(static_cast<std::int32_t>(n));
+ }
+ else if (n <= static_cast<std::uint64_t>((std::numeric_limits<std::int64_t>::max)()))
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('L')); // int64
+ }
+ write_number(static_cast<std::int64_t>(n));
+ }
+ else
+ {
+ JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(n) + " cannot be represented by UBJSON as it does not fit int64"));
+ }
+ }
+
+ // UBJSON: write number (signed integer)
+ template<typename NumberType, typename std::enable_if<
+ std::is_signed<NumberType>::value and
+ not std::is_floating_point<NumberType>::value, int>::type = 0>
+ void write_number_with_ubjson_prefix(const NumberType n,
+ const bool add_prefix)
+ {
+ if ((std::numeric_limits<std::int8_t>::min)() <= n and n <= (std::numeric_limits<std::int8_t>::max)())
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('i')); // int8
+ }
+ write_number(static_cast<std::int8_t>(n));
+ }
+ else if (static_cast<std::int64_t>((std::numeric_limits<std::uint8_t>::min)()) <= n and n <= static_cast<std::int64_t>((std::numeric_limits<std::uint8_t>::max)()))
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('U')); // uint8
+ }
+ write_number(static_cast<std::uint8_t>(n));
+ }
+ else if ((std::numeric_limits<std::int16_t>::min)() <= n and n <= (std::numeric_limits<std::int16_t>::max)())
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('I')); // int16
+ }
+ write_number(static_cast<std::int16_t>(n));
+ }
+ else if ((std::numeric_limits<std::int32_t>::min)() <= n and n <= (std::numeric_limits<std::int32_t>::max)())
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('l')); // int32
+ }
+ write_number(static_cast<std::int32_t>(n));
+ }
+ else if ((std::numeric_limits<std::int64_t>::min)() <= n and n <= (std::numeric_limits<std::int64_t>::max)())
+ {
+ if (add_prefix)
+ {
+ oa->write_character(to_char_type('L')); // int64
+ }
+ write_number(static_cast<std::int64_t>(n));
+ }
+ // LCOV_EXCL_START
+ else
+ {
+ JSON_THROW(out_of_range::create(407, "integer number " + std::to_string(n) + " cannot be represented by UBJSON as it does not fit int64"));
+ }
+ // LCOV_EXCL_STOP
+ }
+
+ /*!
+ @brief determine the type prefix of container values
+
+ @note This function does not need to be 100% accurate when it comes to
+ integer limits. In case a number exceeds the limits of int64_t,
+ this will be detected by a later call to function
+ write_number_with_ubjson_prefix. Therefore, we return 'L' for any
+ value that does not fit the previous limits.
+ */
+ CharType ubjson_prefix(const BasicJsonType& j) const noexcept
+ {
+ switch (j.type())
+ {
+ case value_t::null:
+ return 'Z';
+
+ case value_t::boolean:
+ return j.m_value.boolean ? 'T' : 'F';
+
+ case value_t::number_integer:
+ {
+ if ((std::numeric_limits<std::int8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<std::int8_t>::max)())
+ {
+ return 'i';
+ }
+ if ((std::numeric_limits<std::uint8_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<std::uint8_t>::max)())
+ {
+ return 'U';
+ }
+ if ((std::numeric_limits<std::int16_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<std::int16_t>::max)())
+ {
+ return 'I';
+ }
+ if ((std::numeric_limits<std::int32_t>::min)() <= j.m_value.number_integer and j.m_value.number_integer <= (std::numeric_limits<std::int32_t>::max)())
+ {
+ return 'l';
+ }
+ // no check and assume int64_t (see note above)
+ return 'L';
+ }
+
+ case value_t::number_unsigned:
+ {
+ if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int8_t>::max)()))
+ {
+ return 'i';
+ }
+ if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::uint8_t>::max)()))
+ {
+ return 'U';
+ }
+ if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int16_t>::max)()))
+ {
+ return 'I';
+ }
+ if (j.m_value.number_unsigned <= static_cast<std::uint64_t>((std::numeric_limits<std::int32_t>::max)()))
+ {
+ return 'l';
+ }
+ // no check and assume int64_t (see note above)
+ return 'L';
+ }
+
+ case value_t::number_float:
+ return get_ubjson_float_prefix(j.m_value.number_float);
+
+ case value_t::string:
+ return 'S';
+
+ case value_t::array: // fallthrough
+ case value_t::binary:
+ return '[';
+
+ case value_t::object:
+ return '{';
-/*!
-For n != 0, returns k, such that pow10 := 10^(k-1) <= n < 10^k.
-For n == 0, returns 1 and sets pow10 := 1.
-*/
-inline int find_largest_pow10(const uint32_t n, uint32_t& pow10)
-{
- // LCOV_EXCL_START
- if (n >= 1000000000)
- {
- pow10 = 1000000000;
- return 10;
- }
- // LCOV_EXCL_STOP
- else if (n >= 100000000)
- {
- pow10 = 100000000;
- return 9;
- }
- else if (n >= 10000000)
- {
- pow10 = 10000000;
- return 8;
+ default: // discarded values
+ return 'N';
+ }
}
- else if (n >= 1000000)
+
+ static constexpr CharType get_ubjson_float_prefix(float /*unused*/)
{
- pow10 = 1000000;
- return 7;
+ return 'd'; // float 32
}
- else if (n >= 100000)
+
+ static constexpr CharType get_ubjson_float_prefix(double /*unused*/)
{
- pow10 = 100000;
- return 6;
+ return 'D'; // float 64
}
- else if (n >= 10000)
+
+ ///////////////////////
+ // Utility functions //
+ ///////////////////////
+
+ /*
+ @brief write a number to output input
+ @param[in] n number of type @a NumberType
+ @tparam NumberType the type of the number
+ @tparam OutputIsLittleEndian Set to true if output data is
+ required to be little endian
+
+ @note This function needs to respect the system's endianess, because bytes
+ in CBOR, MessagePack, and UBJSON are stored in network order (big
+ endian) and therefore need reordering on little endian systems.
+ */
+ template<typename NumberType, bool OutputIsLittleEndian = false>
+ void write_number(const NumberType n)
{
- pow10 = 10000;
- return 5;
+ // step 1: write number to array of length NumberType
+ std::array<CharType, sizeof(NumberType)> vec;
+ std::memcpy(vec.data(), &n, sizeof(NumberType));
+
+ // step 2: write array to output (with possible reordering)
+ if (is_little_endian != OutputIsLittleEndian)
+ {
+ // reverse byte order prior to conversion if necessary
+ std::reverse(vec.begin(), vec.end());
+ }
+
+ oa->write_characters(vec.data(), sizeof(NumberType));
}
- else if (n >= 1000)
+
+ public:
+ // The following to_char_type functions are implement the conversion
+ // between uint8_t and CharType. In case CharType is not unsigned,
+ // such a conversion is required to allow values greater than 128.
+ // See <https://github.com/nlohmann/json/issues/1286> for a discussion.
+ template < typename C = CharType,
+ enable_if_t < std::is_signed<C>::value and std::is_signed<char>::value > * = nullptr >
+ static constexpr CharType to_char_type(std::uint8_t x) noexcept
{
- pow10 = 1000;
- return 4;
+ return *reinterpret_cast<char*>(&x);
}
- else if (n >= 100)
+
+ template < typename C = CharType,
+ enable_if_t < std::is_signed<C>::value and std::is_unsigned<char>::value > * = nullptr >
+ static CharType to_char_type(std::uint8_t x) noexcept
{
- pow10 = 100;
- return 3;
+ static_assert(sizeof(std::uint8_t) == sizeof(CharType), "size of CharType must be equal to std::uint8_t");
+ static_assert(std::is_trivial<CharType>::value, "CharType must be trivial");
+ CharType result;
+ std::memcpy(&result, &x, sizeof(x));
+ return result;
}
- else if (n >= 10)
+
+ template<typename C = CharType,
+ enable_if_t<std::is_unsigned<C>::value>* = nullptr>
+ static constexpr CharType to_char_type(std::uint8_t x) noexcept
{
- pow10 = 10;
- return 2;
+ return x;
}
- else
+
+ template < typename InputCharType, typename C = CharType,
+ enable_if_t <
+ std::is_signed<C>::value and
+ std::is_signed<char>::value and
+ std::is_same<char, typename std::remove_cv<InputCharType>::type>::value
+ > * = nullptr >
+ static constexpr CharType to_char_type(InputCharType x) noexcept
{
- pow10 = 1;
- return 1;
+ return x;
}
-}
-inline void grisu2_round(char* buf, int len, uint64_t dist, uint64_t delta,
- uint64_t rest, uint64_t ten_k)
-{
- assert(len >= 1);
- assert(dist <= delta);
- assert(rest <= delta);
- assert(ten_k > 0);
+ private:
+ /// whether we can assume little endianess
+ const bool is_little_endian = little_endianess();
- // <--------------------------- delta ---->
- // <---- dist --------->
- // --------------[------------------+-------------------]--------------
- // M- w M+
- //
- // ten_k
- // <------>
- // <---- rest ---->
- // --------------[------------------+----+--------------]--------------
- // w V
- // = buf * 10^k
- //
- // ten_k represents a unit-in-the-last-place in the decimal representation
- // stored in buf.
- // Decrement buf by ten_k while this takes buf closer to w.
+ /// the output
+ output_adapter_t<CharType> oa = nullptr;
+};
+} // namespace detail
+} // namespace nlohmann
- // The tests are written in this order to avoid overflow in unsigned
- // integer arithmetic.
+// #include <nlohmann/detail/output/output_adapters.hpp>
- while (rest < dist
- and delta - rest >= ten_k
- and (rest + ten_k < dist or dist - rest > rest + ten_k - dist))
- {
- assert(buf[len - 1] != '0');
- buf[len - 1]--;
- rest += ten_k;
- }
-}
+// #include <nlohmann/detail/output/serializer.hpp>
-/*!
-Generates V = buffer * 10^decimal_exponent, such that M- <= V <= M+.
-M- and M+ must be normalized and share the same exponent -60 <= e <= -32.
-*/
-inline void grisu2_digit_gen(char* buffer, int& length, int& decimal_exponent,
- diyfp M_minus, diyfp w, diyfp M_plus)
+
+#include <algorithm> // reverse, remove, fill, find, none_of
+#include <array> // array
+#include <cassert> // assert
+#include <clocale> // localeconv, lconv
+#include <cmath> // labs, isfinite, isnan, signbit
+#include <cstddef> // size_t, ptrdiff_t
+#include <cstdint> // uint8_t
+#include <cstdio> // snprintf
+#include <limits> // numeric_limits
+#include <string> // string
+#include <type_traits> // is_same
+#include <utility> // move
+
+// #include <nlohmann/detail/boolean_operators.hpp>
+
+// #include <nlohmann/detail/conversions/to_chars.hpp>
+
+
+#include <array> // array
+#include <cassert> // assert
+#include <cmath> // signbit, isfinite
+#include <cstdint> // intN_t, uintN_t
+#include <cstring> // memcpy, memmove
+#include <limits> // numeric_limits
+#include <type_traits> // conditional
+
+// #include <nlohmann/detail/boolean_operators.hpp>
+
+// #include <nlohmann/detail/macro_scope.hpp>
+
+
+namespace nlohmann
+{
+namespace detail
{
- static_assert(kAlpha >= -60, "internal error");
- static_assert(kGamma <= -32, "internal error");
- // Generates the digits (and the exponent) of a decimal floating-point
- // number V = buffer * 10^decimal_exponent in the range [M-, M+]. The diyfp's
- // w, M- and M+ share the same exponent e, which satisfies alpha <= e <= gamma.
- //
- // <--------------------------- delta ---->
- // <---- dist --------->
- // --------------[------------------+-------------------]--------------
- // M- w M+
- //
- // Grisu2 generates the digits of M+ from left to right and stops as soon as
- // V is in [M-,M+].
+/*!
+@brief implements the Grisu2 algorithm for binary to decimal floating-point
+conversion.
- assert(M_plus.e >= kAlpha);
- assert(M_plus.e <= kGamma);
+This implementation is a slightly modified version of the reference
+implementation which may be obtained from
+http://florian.loitsch.com/publications (bench.tar.gz).
- uint64_t delta = diyfp::sub(M_plus, M_minus).f; // (significand of (M+ - M-), implicit exponent is e)
- uint64_t dist = diyfp::sub(M_plus, w ).f; // (significand of (M+ - w ), implicit exponent is e)
+The code is distributed under the MIT license, Copyright (c) 2009 Florian Loitsch.
- // Split M+ = f * 2^e into two parts p1 and p2 (note: e < 0):
- //
- // M+ = f * 2^e
- // = ((f div 2^-e) * 2^-e + (f mod 2^-e)) * 2^e
- // = ((p1 ) * 2^-e + (p2 )) * 2^e
- // = p1 + p2 * 2^e
+For a detailed description of the algorithm see:
+
+[1] Loitsch, "Printing Floating-Point Numbers Quickly and Accurately with
+ Integers", Proceedings of the ACM SIGPLAN 2010 Conference on Programming
+ Language Design and Implementation, PLDI 2010
+[2] Burger, Dybvig, "Printing Floating-Point Numbers Quickly and Accurately",
+ Proceedings of the ACM SIGPLAN 1996 Conference on Programming Language
+ Design and Implementation, PLDI 1996
+*/
+namespace dtoa_impl
+{
- const diyfp one(uint64_t{1} << -M_plus.e, M_plus.e);
+template <typename Target, typename Source>
+Target reinterpret_bits(const Source source)
+{
+ static_assert(sizeof(Target) == sizeof(Source), "size mismatch");
- uint32_t p1 = static_cast<uint32_t>(M_plus.f >> -one.e); // p1 = f div 2^-e (Since -e >= 32, p1 fits into a 32-bit int.)
- uint64_t p2 = M_plus.f & (one.f - 1); // p2 = f mod 2^-e
+ Target target;
+ std::memcpy(&target, &source, sizeof(Source));
+ return target;
+}
- // 1)
- //
- // Generate the digits of the integral part p1 = d[n-1]...d[1]d[0]
+struct diyfp // f * 2^e
+{
+ static constexpr int kPrecision = 64; // = q
- assert(p1 > 0);
+ std::uint64_t f = 0;
+ int e = 0;
- uint32_t pow10;
- const int k = find_largest_pow10(p1, pow10);
+ constexpr diyfp(std::uint64_t f_, int e_) noexcept : f(f_), e(e_) {}
- // 10^(k-1) <= p1 < 10^k, pow10 = 10^(k-1)
- //
- // p1 = (p1 div 10^(k-1)) * 10^(k-1) + (p1 mod 10^(k-1))
- // = (d[k-1] ) * 10^(k-1) + (p1 mod 10^(k-1))
- //
- // M+ = p1 + p2 * 2^e
- // = d[k-1] * 10^(k-1) + (p1 mod 10^(k-1)) + p2 * 2^e
- // = d[k-1] * 10^(k-1) + ((p1 mod 10^(k-1)) * 2^-e + p2) * 2^e
- // = d[k-1] * 10^(k-1) + ( rest) * 2^e
- //
- // Now generate the digits d[n] of p1 from left to right (n = k-1,...,0)
- //
- // p1 = d[k-1]...d[n] * 10^n + d[n-1]...d[0]
- //
- // but stop as soon as
- //
- // rest * 2^e = (d[n-1]...d[0] * 2^-e + p2) * 2^e <= delta * 2^e
+ /*!
+ @brief returns x - y
+ @pre x.e == y.e and x.f >= y.f
+ */
+ static diyfp sub(const diyfp& x, const diyfp& y) noexcept
+ {
+ assert(x.e == y.e);
+ assert(x.f >= y.f);
- int n = k;
- while (n > 0)
+ return {x.f - y.f, x.e};
+ }
+
+ /*!
+ @brief returns x * y
+ @note The result is rounded. (Only the upper q bits are returned.)
+ */
+ static diyfp mul(const diyfp& x, const diyfp& y) noexcept
{
- // Invariants:
- // M+ = buffer * 10^n + (p1 + p2 * 2^e) (buffer = 0 for n = k)
- // pow10 = 10^(n-1) <= p1 < 10^n
- //
- const uint32_t d = p1 / pow10; // d = p1 div 10^(n-1)
- const uint32_t r = p1 % pow10; // r = p1 mod 10^(n-1)
- //
- // M+ = buffer * 10^n + (d * 10^(n-1) + r) + p2 * 2^e
- // = (buffer * 10 + d) * 10^(n-1) + (r + p2 * 2^e)
+ static_assert(kPrecision == 64, "internal error");
+
+ // Computes:
+ // f = round((x.f * y.f) / 2^q)
+ // e = x.e + y.e + q
+
+ // Emulate the 64-bit * 64-bit multiplication:
//
- assert(d <= 9);
- buffer[length++] = static_cast<char>('0' + d); // buffer := buffer * 10 + d
+ // p = u * v
+ // = (u_lo + 2^32 u_hi) (v_lo + 2^32 v_hi)
+ // = (u_lo v_lo ) + 2^32 ((u_lo v_hi ) + (u_hi v_lo )) + 2^64 (u_hi v_hi )
+ // = (p0 ) + 2^32 ((p1 ) + (p2 )) + 2^64 (p3 )
+ // = (p0_lo + 2^32 p0_hi) + 2^32 ((p1_lo + 2^32 p1_hi) + (p2_lo + 2^32 p2_hi)) + 2^64 (p3 )
+ // = (p0_lo ) + 2^32 (p0_hi + p1_lo + p2_lo ) + 2^64 (p1_hi + p2_hi + p3)
+ // = (p0_lo ) + 2^32 (Q ) + 2^64 (H )
+ // = (p0_lo ) + 2^32 (Q_lo + 2^32 Q_hi ) + 2^64 (H )
//
- // M+ = buffer * 10^(n-1) + (r + p2 * 2^e)
+ // (Since Q might be larger than 2^32 - 1)
//
- p1 = r;
- n--;
+ // = (p0_lo + 2^32 Q_lo) + 2^64 (Q_hi + H)
//
- // M+ = buffer * 10^n + (p1 + p2 * 2^e)
- // pow10 = 10^n
+ // (Q_hi + H does not overflow a 64-bit int)
//
+ // = p_lo + 2^64 p_hi
- // Now check if enough digits have been generated.
- // Compute
+ const std::uint64_t u_lo = x.f & 0xFFFFFFFFu;
+ const std::uint64_t u_hi = x.f >> 32u;
+ const std::uint64_t v_lo = y.f & 0xFFFFFFFFu;
+ const std::uint64_t v_hi = y.f >> 32u;
+
+ const std::uint64_t p0 = u_lo * v_lo;
+ const std::uint64_t p1 = u_lo * v_hi;
+ const std::uint64_t p2 = u_hi * v_lo;
+ const std::uint64_t p3 = u_hi * v_hi;
+
+ const std::uint64_t p0_hi = p0 >> 32u;
+ const std::uint64_t p1_lo = p1 & 0xFFFFFFFFu;
+ const std::uint64_t p1_hi = p1 >> 32u;
+ const std::uint64_t p2_lo = p2 & 0xFFFFFFFFu;
+ const std::uint64_t p2_hi = p2 >> 32u;
+
+ std::uint64_t Q = p0_hi + p1_lo + p2_lo;
+
+ // The full product might now be computed as
//
- // p1 + p2 * 2^e = (p1 * 2^-e + p2) * 2^e = rest * 2^e
+ // p_hi = p3 + p2_hi + p1_hi + (Q >> 32)
+ // p_lo = p0_lo + (Q << 32)
//
- // Note:
- // Since rest and delta share the same exponent e, it suffices to
- // compare the significands.
- const uint64_t rest = (uint64_t{p1} << -one.e) + p2;
- if (rest <= delta)
- {
- // V = buffer * 10^n, with M- <= V <= M+.
+ // But in this particular case here, the full p_lo is not required.
+ // Effectively we only need to add the highest bit in p_lo to p_hi (and
+ // Q_hi + 1 does not overflow).
- decimal_exponent += n;
+ Q += std::uint64_t{1} << (64u - 32u - 1u); // round, ties up
- // We may now just stop. But instead look if the buffer could be
- // decremented to bring V closer to w.
- //
- // pow10 = 10^n is now 1 ulp in the decimal representation V.
- // The rounding procedure works with diyfp's with an implicit
- // exponent of e.
- //
- // 10^n = (10^n * 2^-e) * 2^e = ulp * 2^e
- //
- const uint64_t ten_n = uint64_t{pow10} << -one.e;
- grisu2_round(buffer, length, dist, delta, rest, ten_n);
+ const std::uint64_t h = p3 + p2_hi + p1_hi + (Q >> 32u);
- return;
+ return {h, x.e + y.e + 64};
+ }
+
+ /*!
+ @brief normalize x such that the significand is >= 2^(q-1)
+ @pre x.f != 0
+ */
+ static diyfp normalize(diyfp x) noexcept
+ {
+ assert(x.f != 0);
+
+ while ((x.f >> 63u) == 0)
+ {
+ x.f <<= 1u;
+ x.e--;
}
- pow10 /= 10;
- //
- // pow10 = 10^(n-1) <= p1 < 10^n
- // Invariants restored.
+ return x;
}
- // 2)
- //
- // The digits of the integral part have been generated:
- //
- // M+ = d[k-1]...d[1]d[0] + p2 * 2^e
- // = buffer + p2 * 2^e
- //
- // Now generate the digits of the fractional part p2 * 2^e.
- //
- // Note:
- // No decimal point is generated: the exponent is adjusted instead.
- //
- // p2 actually represents the fraction
- //
- // p2 * 2^e
- // = p2 / 2^-e
- // = d[-1] / 10^1 + d[-2] / 10^2 + ...
- //
- // Now generate the digits d[-m] of p1 from left to right (m = 1,2,...)
+ /*!
+ @brief normalize x such that the result has the exponent E
+ @pre e >= x.e and the upper e - x.e bits of x.f must be zero.
+ */
+ static diyfp normalize_to(const diyfp& x, const int target_exponent) noexcept
+ {
+ const int delta = x.e - target_exponent;
+
+ assert(delta >= 0);
+ assert(((x.f << delta) >> delta) == x.f);
+
+ return {x.f << delta, target_exponent};
+ }
+};
+
+struct boundaries
+{
+ diyfp w;
+ diyfp minus;
+ diyfp plus;
+};
+
+/*!
+Compute the (normalized) diyfp representing the input number 'value' and its
+boundaries.
+
+@pre value must be finite and positive
+*/
+template <typename FloatType>
+boundaries compute_boundaries(FloatType value)
+{
+ assert(std::isfinite(value));
+ assert(value > 0);
+
+ // Convert the IEEE representation into a diyfp.
//
- // p2 * 2^e = d[-1]d[-2]...d[-m] * 10^-m
- // + 10^-m * (d[-m-1] / 10^1 + d[-m-2] / 10^2 + ...)
+ // If v is denormal:
+ // value = 0.F * 2^(1 - bias) = ( F) * 2^(1 - bias - (p-1))
+ // If v is normalized:
+ // value = 1.F * 2^(E - bias) = (2^(p-1) + F) * 2^(E - bias - (p-1))
+
+ static_assert(std::numeric_limits<FloatType>::is_iec559,
+ "internal error: dtoa_short requires an IEEE-754 floating-point implementation");
+
+ constexpr int kPrecision = std::numeric_limits<FloatType>::digits; // = p (includes the hidden bit)
+ constexpr int kBias = std::numeric_limits<FloatType>::max_exponent - 1 + (kPrecision - 1);
+ constexpr int kMinExp = 1 - kBias;
+ constexpr std::uint64_t kHiddenBit = std::uint64_t{1} << (kPrecision - 1); // = 2^(p-1)
+
+ using bits_type = typename std::conditional<kPrecision == 24, std::uint32_t, std::uint64_t >::type;
+
+ const std::uint64_t bits = reinterpret_bits<bits_type>(value);
+ const std::uint64_t E = bits >> (kPrecision - 1);
+ const std::uint64_t F = bits & (kHiddenBit - 1);
+
+ const bool is_denormal = E == 0;
+ const diyfp v = is_denormal
+ ? diyfp(F, kMinExp)
+ : diyfp(F + kHiddenBit, static_cast<int>(E) - kBias);
+
+ // Compute the boundaries m- and m+ of the floating-point value
+ // v = f * 2^e.
//
- // using
+ // Determine v- and v+, the floating-point predecessor and successor if v,
+ // respectively.
//
- // 10^m * p2 = ((10^m * p2) div 2^-e) * 2^-e + ((10^m * p2) mod 2^-e)
- // = ( d) * 2^-e + ( r)
+ // v- = v - 2^e if f != 2^(p-1) or e == e_min (A)
+ // = v - 2^(e-1) if f == 2^(p-1) and e > e_min (B)
//
- // or
- // 10^m * p2 * 2^e = d + r * 2^e
+ // v+ = v + 2^e
//
- // i.e.
+ // Let m- = (v- + v) / 2 and m+ = (v + v+) / 2. All real numbers _strictly_
+ // between m- and m+ round to v, regardless of how the input rounding
+ // algorithm breaks ties.
//
- // M+ = buffer + p2 * 2^e
- // = buffer + 10^-m * (d + r * 2^e)
- // = (buffer * 10^m + d) * 10^-m + 10^-m * r * 2^e
+ // ---+-------------+-------------+-------------+-------------+--- (A)
+ // v- m- v m+ v+
//
- // and stop as soon as 10^-m * r * 2^e <= delta * 2^e
+ // -----------------+------+------+-------------+-------------+--- (B)
+ // v- m- v m+ v+
- assert(p2 > delta);
+ const bool lower_boundary_is_closer = F == 0 and E > 1;
+ const diyfp m_plus = diyfp(2 * v.f + 1, v.e - 1);
+ const diyfp m_minus = lower_boundary_is_closer
+ ? diyfp(4 * v.f - 1, v.e - 2) // (B)
+ : diyfp(2 * v.f - 1, v.e - 1); // (A)
- int m = 0;
- for (;;)
- {
- // Invariant:
- // M+ = buffer * 10^-m + 10^-m * (d[-m-1] / 10 + d[-m-2] / 10^2 + ...) * 2^e
- // = buffer * 10^-m + 10^-m * (p2 ) * 2^e
- // = buffer * 10^-m + 10^-m * (1/10 * (10 * p2) ) * 2^e
- // = buffer * 10^-m + 10^-m * (1/10 * ((10*p2 div 2^-e) * 2^-e + (10*p2 mod 2^-e)) * 2^e
- //
- assert(p2 <= UINT64_MAX / 10);
- p2 *= 10;
- const uint64_t d = p2 >> -one.e; // d = (10 * p2) div 2^-e
- const uint64_t r = p2 & (one.f - 1); // r = (10 * p2) mod 2^-e
- //
- // M+ = buffer * 10^-m + 10^-m * (1/10 * (d * 2^-e + r) * 2^e
- // = buffer * 10^-m + 10^-m * (1/10 * (d + r * 2^e))
- // = (buffer * 10 + d) * 10^(-m-1) + 10^(-m-1) * r * 2^e
- //
- assert(d <= 9);
- buffer[length++] = static_cast<char>('0' + d); // buffer := buffer * 10 + d
- //
- // M+ = buffer * 10^(-m-1) + 10^(-m-1) * r * 2^e
- //
- p2 = r;
- m++;
- //
- // M+ = buffer * 10^-m + 10^-m * p2 * 2^e
- // Invariant restored.
+ // Determine the normalized w+ = m+.
+ const diyfp w_plus = diyfp::normalize(m_plus);
+
+ // Determine w- = m- such that e_(w-) = e_(w+).
+ const diyfp w_minus = diyfp::normalize_to(m_minus, w_plus.e);
+
+ return {diyfp::normalize(v), w_minus, w_plus};
+}
+
+// Given normalized diyfp w, Grisu needs to find a (normalized) cached
+// power-of-ten c, such that the exponent of the product c * w = f * 2^e lies
+// within a certain range [alpha, gamma] (Definition 3.2 from [1])
+//
+// alpha <= e = e_c + e_w + q <= gamma
+//
+// or
+//
+// f_c * f_w * 2^alpha <= f_c 2^(e_c) * f_w 2^(e_w) * 2^q
+// <= f_c * f_w * 2^gamma
+//
+// Since c and w are normalized, i.e. 2^(q-1) <= f < 2^q, this implies
+//
+// 2^(q-1) * 2^(q-1) * 2^alpha <= c * w * 2^q < 2^q * 2^q * 2^gamma
+//
+// or
+//
+// 2^(q - 2 + alpha) <= c * w < 2^(q + gamma)
+//
+// The choice of (alpha,gamma) determines the size of the table and the form of
+// the digit generation procedure. Using (alpha,gamma)=(-60,-32) works out well
+// in practice:
+//
+// The idea is to cut the number c * w = f * 2^e into two parts, which can be
+// processed independently: An integral part p1, and a fractional part p2:
+//
+// f * 2^e = ( (f div 2^-e) * 2^-e + (f mod 2^-e) ) * 2^e
+// = (f div 2^-e) + (f mod 2^-e) * 2^e
+// = p1 + p2 * 2^e
+//
+// The conversion of p1 into decimal form requires a series of divisions and
+// modulos by (a power of) 10. These operations are faster for 32-bit than for
+// 64-bit integers, so p1 should ideally fit into a 32-bit integer. This can be
+// achieved by choosing
+//
+// -e >= 32 or e <= -32 := gamma
+//
+// In order to convert the fractional part
+//
+// p2 * 2^e = p2 / 2^-e = d[-1] / 10^1 + d[-2] / 10^2 + ...
+//
+// into decimal form, the fraction is repeatedly multiplied by 10 and the digits
+// d[-i] are extracted in order:
+//
+// (10 * p2) div 2^-e = d[-1]
+// (10 * p2) mod 2^-e = d[-2] / 10^1 + ...
+//
+// The multiplication by 10 must not overflow. It is sufficient to choose
+//
+// 10 * p2 < 16 * p2 = 2^4 * p2 <= 2^64.
+//
+// Since p2 = f mod 2^-e < 2^-e,
+//
+// -e <= 60 or e >= -60 := alpha
- // Check if enough digits have been generated.
- //
- // 10^-m * p2 * 2^e <= delta * 2^e
- // p2 * 2^e <= 10^m * delta * 2^e
- // p2 <= 10^m * delta
- delta *= 10;
- dist *= 10;
- if (p2 <= delta)
- {
- break;
- }
- }
+constexpr int kAlpha = -60;
+constexpr int kGamma = -32;
- // V = buffer * 10^-m, with M- <= V <= M+.
+struct cached_power // c = f * 2^e ~= 10^k
+{
+ std::uint64_t f;
+ int e;
+ int k;
+};
- decimal_exponent -= m;
+/*!
+For a normalized diyfp w = f * 2^e, this function returns a (normalized) cached
+power-of-ten c = f_c * 2^e_c, such that the exponent of the product w * c
+satisfies (Definition 3.2 from [1])
- // 1 ulp in the decimal representation is now 10^-m.
- // Since delta and dist are now scaled by 10^m, we need to do the
- // same with ulp in order to keep the units in sync.
+ alpha <= e_c + e + q <= gamma.
+*/
+inline cached_power get_cached_power_for_binary_exponent(int e)
+{
+ // Now
//
- // 10^m * 10^-m = 1 = 2^-e * 2^e = ten_m * 2^e
+ // alpha <= e_c + e + q <= gamma (1)
+ // ==> f_c * 2^alpha <= c * 2^e * 2^q
//
- const uint64_t ten_m = one.f;
- grisu2_round(buffer, length, dist, delta, p2, ten_m);
-
- // By construction this algorithm generates the shortest possible decimal
- // number (Loitsch, Theorem 6.2) which rounds back to w.
- // For an input number of precision p, at least
+ // and since the c's are normalized, 2^(q-1) <= f_c,
//
- // N = 1 + ceil(p * log_10(2))
+ // ==> 2^(q - 1 + alpha) <= c * 2^(e + q)
+ // ==> 2^(alpha - e - 1) <= c
//
- // decimal digits are sufficient to identify all binary floating-point
- // numbers (Matula, "In-and-Out conversions").
- // This implies that the algorithm does not produce more than N decimal
- // digits.
+ // If c were an exact power of ten, i.e. c = 10^k, one may determine k as
//
- // N = 17 for p = 53 (IEEE double precision)
- // N = 9 for p = 24 (IEEE single precision)
-}
-
-/*!
-v = buf * 10^decimal_exponent
-len is the length of the buffer (number of decimal digits)
-The buffer must be large enough, i.e. >= max_digits10.
-*/
-inline void grisu2(char* buf, int& len, int& decimal_exponent,
- diyfp m_minus, diyfp v, diyfp m_plus)
-{
- assert(m_plus.e == m_minus.e);
- assert(m_plus.e == v.e);
-
- // --------(-----------------------+-----------------------)-------- (A)
- // m- v m+
+ // k = ceil( log_10( 2^(alpha - e - 1) ) )
+ // = ceil( (alpha - e - 1) * log_10(2) )
//
- // --------------------(-----------+-----------------------)-------- (B)
- // m- v m+
+ // From the paper:
+ // "In theory the result of the procedure could be wrong since c is rounded,
+ // and the computation itself is approximated [...]. In practice, however,
+ // this simple function is sufficient."
//
- // First scale v (and m- and m+) such that the exponent is in the range
- // [alpha, gamma].
-
- const cached_power cached = get_cached_power_for_binary_exponent(m_plus.e);
-
- const diyfp c_minus_k(cached.f, cached.e); // = c ~= 10^-k
-
- // The exponent of the products is = v.e + c_minus_k.e + q and is in the range [alpha,gamma]
- const diyfp w = diyfp::mul(v, c_minus_k);
- const diyfp w_minus = diyfp::mul(m_minus, c_minus_k);
- const diyfp w_plus = diyfp::mul(m_plus, c_minus_k);
-
- // ----(---+---)---------------(---+---)---------------(---+---)----
- // w- w w+
- // = c*m- = c*v = c*m+
+ // For IEEE double precision floating-point numbers converted into
+ // normalized diyfp's w = f * 2^e, with q = 64,
//
- // diyfp::mul rounds its result and c_minus_k is approximated too. w, w- and
- // w+ are now off by a small amount.
- // In fact:
+ // e >= -1022 (min IEEE exponent)
+ // -52 (p - 1)
+ // -52 (p - 1, possibly normalize denormal IEEE numbers)
+ // -11 (normalize the diyfp)
+ // = -1137
//
- // w - v * 10^k < 1 ulp
+ // and
//
- // To account for this inaccuracy, add resp. subtract 1 ulp.
+ // e <= +1023 (max IEEE exponent)
+ // -52 (p - 1)
+ // -11 (normalize the diyfp)
+ // = 960
//
- // --------+---[---------------(---+---)---------------]---+--------
- // w- M- w M+ w+
+ // This binary exponent range [-1137,960] results in a decimal exponent
+ // range [-307,324]. One does not need to store a cached power for each
+ // k in this range. For each such k it suffices to find a cached power
+ // such that the exponent of the product lies in [alpha,gamma].
+ // This implies that the difference of the decimal exponents of adjacent
+ // table entries must be less than or equal to
//
- // Now any number in [M-, M+] (bounds included) will round to w when input,
- // regardless of how the input rounding algorithm breaks ties.
+ // floor( (gamma - alpha) * log_10(2) ) = 8.
//
- // And digit_gen generates the shortest possible such number in [M-, M+].
- // Note that this does not mean that Grisu2 always generates the shortest
- // possible number in the interval (m-, m+).
- const diyfp M_minus(w_minus.f + 1, w_minus.e);
- const diyfp M_plus (w_plus.f - 1, w_plus.e );
+ // (A smaller distance gamma-alpha would require a larger table.)
- decimal_exponent = -cached.k; // = -(-k) = k
+ // NB:
+ // Actually this function returns c, such that -60 <= e_c + e + 64 <= -34.
- grisu2_digit_gen(buf, len, decimal_exponent, M_minus, w, M_plus);
-}
+ constexpr int kCachedPowersMinDecExp = -300;
+ constexpr int kCachedPowersDecStep = 8;
-/*!
-v = buf * 10^decimal_exponent
-len is the length of the buffer (number of decimal digits)
-The buffer must be large enough, i.e. >= max_digits10.
-*/
-template <typename FloatType>
-void grisu2(char* buf, int& len, int& decimal_exponent, FloatType value)
-{
- static_assert(diyfp::kPrecision >= std::numeric_limits<FloatType>::digits + 3,
- "internal error: not enough precision");
+ static constexpr std::array<cached_power, 79> kCachedPowers =
+ {
+ {
+ { 0xAB70FE17C79AC6CA, -1060, -300 },
+ { 0xFF77B1FCBEBCDC4F, -1034, -292 },
+ { 0xBE5691EF416BD60C, -1007, -284 },
+ { 0x8DD01FAD907FFC3C, -980, -276 },
+ { 0xD3515C2831559A83, -954, -268 },
+ { 0x9D71AC8FADA6C9B5, -927, -260 },
+ { 0xEA9C227723EE8BCB, -901, -252 },
+ { 0xAECC49914078536D, -874, -244 },
+ { 0x823C12795DB6CE57, -847, -236 },
+ { 0xC21094364DFB5637, -821, -228 },
+ { 0x9096EA6F3848984F, -794, -220 },
+ { 0xD77485CB25823AC7, -768, -212 },
+ { 0xA086CFCD97BF97F4, -741, -204 },
+ { 0xEF340A98172AACE5, -715, -196 },
+ { 0xB23867FB2A35B28E, -688, -188 },
+ { 0x84C8D4DFD2C63F3B, -661, -180 },
+ { 0xC5DD44271AD3CDBA, -635, -172 },
+ { 0x936B9FCEBB25C996, -608, -164 },
+ { 0xDBAC6C247D62A584, -582, -156 },
+ { 0xA3AB66580D5FDAF6, -555, -148 },
+ { 0xF3E2F893DEC3F126, -529, -140 },
+ { 0xB5B5ADA8AAFF80B8, -502, -132 },
+ { 0x87625F056C7C4A8B, -475, -124 },
+ { 0xC9BCFF6034C13053, -449, -116 },
+ { 0x964E858C91BA2655, -422, -108 },
+ { 0xDFF9772470297EBD, -396, -100 },
+ { 0xA6DFBD9FB8E5B88F, -369, -92 },
+ { 0xF8A95FCF88747D94, -343, -84 },
+ { 0xB94470938FA89BCF, -316, -76 },
+ { 0x8A08F0F8BF0F156B, -289, -68 },
+ { 0xCDB02555653131B6, -263, -60 },
+ { 0x993FE2C6D07B7FAC, -236, -52 },
+ { 0xE45C10C42A2B3B06, -210, -44 },
+ { 0xAA242499697392D3, -183, -36 },
+ { 0xFD87B5F28300CA0E, -157, -28 },
+ { 0xBCE5086492111AEB, -130, -20 },
+ { 0x8CBCCC096F5088CC, -103, -12 },
+ { 0xD1B71758E219652C, -77, -4 },
+ { 0x9C40000000000000, -50, 4 },
+ { 0xE8D4A51000000000, -24, 12 },
+ { 0xAD78EBC5AC620000, 3, 20 },
+ { 0x813F3978F8940984, 30, 28 },
+ { 0xC097CE7BC90715B3, 56, 36 },
+ { 0x8F7E32CE7BEA5C70, 83, 44 },
+ { 0xD5D238A4ABE98068, 109, 52 },
+ { 0x9F4F2726179A2245, 136, 60 },
+ { 0xED63A231D4C4FB27, 162, 68 },
+ { 0xB0DE65388CC8ADA8, 189, 76 },
+ { 0x83C7088E1AAB65DB, 216, 84 },
+ { 0xC45D1DF942711D9A, 242, 92 },
+ { 0x924D692CA61BE758, 269, 100 },
+ { 0xDA01EE641A708DEA, 295, 108 },
+ { 0xA26DA3999AEF774A, 322, 116 },
+ { 0xF209787BB47D6B85, 348, 124 },
+ { 0xB454E4A179DD1877, 375, 132 },
+ { 0x865B86925B9BC5C2, 402, 140 },
+ { 0xC83553C5C8965D3D, 428, 148 },
+ { 0x952AB45CFA97A0B3, 455, 156 },
+ { 0xDE469FBD99A05FE3, 481, 164 },
+ { 0xA59BC234DB398C25, 508, 172 },
+ { 0xF6C69A72A3989F5C, 534, 180 },
+ { 0xB7DCBF5354E9BECE, 561, 188 },
+ { 0x88FCF317F22241E2, 588, 196 },
+ { 0xCC20CE9BD35C78A5, 614, 204 },
+ { 0x98165AF37B2153DF, 641, 212 },
+ { 0xE2A0B5DC971F303A, 667, 220 },
+ { 0xA8D9D1535CE3B396, 694, 228 },
+ { 0xFB9B7CD9A4A7443C, 720, 236 },
+ { 0xBB764C4CA7A44410, 747, 244 },
+ { 0x8BAB8EEFB6409C1A, 774, 252 },
+ { 0xD01FEF10A657842C, 800, 260 },
+ { 0x9B10A4E5E9913129, 827, 268 },
+ { 0xE7109BFBA19C0C9D, 853, 276 },
+ { 0xAC2820D9623BF429, 880, 284 },
+ { 0x80444B5E7AA7CF85, 907, 292 },
+ { 0xBF21E44003ACDD2D, 933, 300 },
+ { 0x8E679C2F5E44FF8F, 960, 308 },
+ { 0xD433179D9C8CB841, 986, 316 },
+ { 0x9E19DB92B4E31BA9, 1013, 324 },
+ }
+ };
- assert(std::isfinite(value));
- assert(value > 0);
+ // This computation gives exactly the same results for k as
+ // k = ceil((kAlpha - e - 1) * 0.30102999566398114)
+ // for |e| <= 1500, but doesn't require floating-point operations.
+ // NB: log_10(2) ~= 78913 / 2^18
+ assert(e >= -1500);
+ assert(e <= 1500);
+ const int f = kAlpha - e - 1;
+ const int k = (f * 78913) / (1 << 18) + static_cast<int>(f > 0);
- // If the neighbors (and boundaries) of 'value' are always computed for double-precision
- // numbers, all float's can be recovered using strtod (and strtof). However, the resulting
- // decimal representations are not exactly "short".
- //
- // The documentation for 'std::to_chars' (http://en.cppreference.com/w/cpp/utility/to_chars)
- // says "value is converted to a string as if by std::sprintf in the default ("C") locale"
- // and since sprintf promotes float's to double's, I think this is exactly what 'std::to_chars'
- // does.
- // On the other hand, the documentation for 'std::to_chars' requires that "parsing the
- // representation using the corresponding std::from_chars function recovers value exactly". That
- // indicates that single precision floating-point numbers should be recovered using
- // 'std::strtof'.
- //
- // NB: If the neighbors are computed for single-precision numbers, there is a single float
- // (7.0385307e-26f) which can't be recovered using strtod. The resulting double precision
- // value is off by 1 ulp.
-#if 0
- const boundaries w = compute_boundaries(static_cast<double>(value));
-#else
- const boundaries w = compute_boundaries(value);
-#endif
+ const int index = (-kCachedPowersMinDecExp + k + (kCachedPowersDecStep - 1)) / kCachedPowersDecStep;
+ assert(index >= 0);
+ assert(static_cast<std::size_t>(index) < kCachedPowers.size());
- grisu2(buf, len, decimal_exponent, w.minus, w.w, w.plus);
+ const cached_power cached = kCachedPowers[static_cast<std::size_t>(index)];
+ assert(kAlpha <= cached.e + e + 64);
+ assert(kGamma >= cached.e + e + 64);
+
+ return cached;
}
/*!
-@brief appends a decimal representation of e to buf
-@return a pointer to the element following the exponent.
-@pre -1000 < e < 1000
+For n != 0, returns k, such that pow10 := 10^(k-1) <= n < 10^k.
+For n == 0, returns 1 and sets pow10 := 1.
*/
-inline char* append_exponent(char* buf, int e)
+inline int find_largest_pow10(const std::uint32_t n, std::uint32_t& pow10)
{
- assert(e > -1000);
- assert(e < 1000);
-
- if (e < 0)
- {
- e = -e;
- *buf++ = '-';
- }
- else
- {
- *buf++ = '+';
- }
-
- uint32_t k = static_cast<uint32_t>(e);
- if (k < 10)
- {
- // Always print at least two digits in the exponent.
- // This is for compatibility with printf("%g").
- *buf++ = '0';
- *buf++ = static_cast<char>('0' + k);
- }
- else if (k < 100)
+ // LCOV_EXCL_START
+ if (n >= 1000000000)
{
- *buf++ = static_cast<char>('0' + k / 10);
- k %= 10;
- *buf++ = static_cast<char>('0' + k);
+ pow10 = 1000000000;
+ return 10;
}
- else
+ // LCOV_EXCL_STOP
+ else if (n >= 100000000)
{
- *buf++ = static_cast<char>('0' + k / 100);
- k %= 100;
- *buf++ = static_cast<char>('0' + k / 10);
- k %= 10;
- *buf++ = static_cast<char>('0' + k);
- }
-
- return buf;
-}
-
-/*!
-@brief prettify v = buf * 10^decimal_exponent
-
-If v is in the range [10^min_exp, 10^max_exp) it will be printed in fixed-point
-notation. Otherwise it will be printed in exponential notation.
-
-@pre min_exp < 0
-@pre max_exp > 0
-*/
-inline char* format_buffer(char* buf, int len, int decimal_exponent,
- int min_exp, int max_exp)
-{
- assert(min_exp < 0);
- assert(max_exp > 0);
-
- const int k = len;
- const int n = len + decimal_exponent;
-
- // v = buf * 10^(n-k)
- // k is the length of the buffer (number of decimal digits)
- // n is the position of the decimal point relative to the start of the buffer.
-
- if (k <= n and n <= max_exp)
+ pow10 = 100000000;
+ return 9;
+ }
+ else if (n >= 10000000)
{
- // digits[000]
- // len <= max_exp + 2
-
- std::memset(buf + k, '0', static_cast<size_t>(n - k));
- // Make it look like a floating-point number (#362, #378)
- buf[n + 0] = '.';
- buf[n + 1] = '0';
- return buf + (n + 2);
+ pow10 = 10000000;
+ return 8;
}
-
- if (0 < n and n <= max_exp)
+ else if (n >= 1000000)
{
- // dig.its
- // len <= max_digits10 + 1
-
- assert(k > n);
-
- std::memmove(buf + (n + 1), buf + n, static_cast<size_t>(k - n));
- buf[n] = '.';
- return buf + (k + 1);
+ pow10 = 1000000;
+ return 7;
}
-
- if (min_exp < n and n <= 0)
+ else if (n >= 100000)
{
- // 0.[000]digits
- // len <= 2 + (-min_exp - 1) + max_digits10
-
- std::memmove(buf + (2 + -n), buf, static_cast<size_t>(k));
- buf[0] = '0';
- buf[1] = '.';
- std::memset(buf + 2, '0', static_cast<size_t>(-n));
- return buf + (2 + (-n) + k);
+ pow10 = 100000;
+ return 6;
}
-
- if (k == 1)
+ else if (n >= 10000)
{
- // dE+123
- // len <= 1 + 5
-
- buf += 1;
+ pow10 = 10000;
+ return 5;
}
- else
+ else if (n >= 1000)
{
- // d.igitsE+123
- // len <= max_digits10 + 1 + 5
-
- std::memmove(buf + 2, buf + 1, static_cast<size_t>(k - 1));
- buf[1] = '.';
- buf += 1 + k;
+ pow10 = 1000;
+ return 4;
}
-
- *buf++ = 'e';
- return append_exponent(buf, n - 1);
-}
-
-} // namespace dtoa_impl
-
-/*!
-@brief generates a decimal representation of the floating-point number value in [first, last).
-
-The format of the resulting decimal representation is similar to printf's %g
-format. Returns an iterator pointing past-the-end of the decimal representation.
-
-@note The input number must be finite, i.e. NaN's and Inf's are not supported.
-@note The buffer must be large enough.
-@note The result is NOT null-terminated.
-*/
-template <typename FloatType>
-char* to_chars(char* first, char* last, FloatType value)
-{
- static_cast<void>(last); // maybe unused - fix warning
- assert(std::isfinite(value));
-
- // Use signbit(value) instead of (value < 0) since signbit works for -0.
- if (std::signbit(value))
+ else if (n >= 100)
{
- value = -value;
- *first++ = '-';
+ pow10 = 100;
+ return 3;
}
-
- if (value == 0) // +-0
+ else if (n >= 10)
{
- *first++ = '0';
- // Make it look like a floating-point number (#362, #378)
- *first++ = '.';
- *first++ = '0';
- return first;
+ pow10 = 10;
+ return 2;
+ }
+ else
+ {
+ pow10 = 1;
+ return 1;
}
-
- assert(last - first >= std::numeric_limits<FloatType>::max_digits10);
-
- // Compute v = buffer * 10^decimal_exponent.
- // The decimal digits are stored in the buffer, which needs to be interpreted
- // as an unsigned decimal integer.
- // len is the length of the buffer, i.e. the number of decimal digits.
- int len = 0;
- int decimal_exponent = 0;
- dtoa_impl::grisu2(first, len, decimal_exponent, value);
-
- assert(len <= std::numeric_limits<FloatType>::max_digits10);
-
- // Format the buffer like printf("%.*g", prec, value)
- constexpr int kMinExp = -4;
- // Use digits10 here to increase compatibility with version 2.
- constexpr int kMaxExp = std::numeric_limits<FloatType>::digits10;
-
- assert(last - first >= kMaxExp + 2);
- assert(last - first >= 2 + (-kMinExp - 1) + std::numeric_limits<FloatType>::max_digits10);
- assert(last - first >= std::numeric_limits<FloatType>::max_digits10 + 6);
-
- return dtoa_impl::format_buffer(first, len, decimal_exponent, kMinExp, kMaxExp);
}
-} // namespace detail
-} // namespace nlohmann
-
-// #include <nlohmann/detail/macro_scope.hpp>
-
-// #include <nlohmann/detail/meta.hpp>
-
-// #include <nlohmann/detail/output/output_adapters.hpp>
-
-// #include <nlohmann/detail/value_t.hpp>
-
-
-namespace nlohmann
-{
-namespace detail
-{
-///////////////////
-// serialization //
-///////////////////
-
-template<typename BasicJsonType>
-class serializer
+inline void grisu2_round(char* buf, int len, std::uint64_t dist, std::uint64_t delta,
+ std::uint64_t rest, std::uint64_t ten_k)
{
- using string_t = typename BasicJsonType::string_t;
- using number_float_t = typename BasicJsonType::number_float_t;
- using number_integer_t = typename BasicJsonType::number_integer_t;
- using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
- static constexpr uint8_t UTF8_ACCEPT = 0;
- static constexpr uint8_t UTF8_REJECT = 1;
-
- public:
- /*!
- @param[in] s output stream to serialize to
- @param[in] ichar indentation character to use
- */
- serializer(output_adapter_t<char> s, const char ichar)
- : o(std::move(s)), loc(std::localeconv()),
- thousands_sep(loc->thousands_sep == nullptr ? '\0' : * (loc->thousands_sep)),
- decimal_point(loc->decimal_point == nullptr ? '\0' : * (loc->decimal_point)),
- indent_char(ichar), indent_string(512, indent_char)
- {}
-
- // delete because of pointer members
- serializer(const serializer&) = delete;
- serializer& operator=(const serializer&) = delete;
-
- /*!
- @brief internal implementation of the serialization function
+ assert(len >= 1);
+ assert(dist <= delta);
+ assert(rest <= delta);
+ assert(ten_k > 0);
- This function is called by the public member function dump and organizes
- the serialization internally. The indentation level is propagated as
- additional parameter. In case of arrays and objects, the function is
- called recursively.
+ // <--------------------------- delta ---->
+ // <---- dist --------->
+ // --------------[------------------+-------------------]--------------
+ // M- w M+
+ //
+ // ten_k
+ // <------>
+ // <---- rest ---->
+ // --------------[------------------+----+--------------]--------------
+ // w V
+ // = buf * 10^k
+ //
+ // ten_k represents a unit-in-the-last-place in the decimal representation
+ // stored in buf.
+ // Decrement buf by ten_k while this takes buf closer to w.
- - strings and object keys are escaped using `escape_string()`
- - integer numbers are converted implicitly via `operator<<`
- - floating-point numbers are converted to a string using `"%g"` format
+ // The tests are written in this order to avoid overflow in unsigned
+ // integer arithmetic.
- @param[in] val value to serialize
- @param[in] pretty_print whether the output shall be pretty-printed
- @param[in] indent_step the indent level
- @param[in] current_indent the current indent level (only used internally)
- */
- void dump(const BasicJsonType& val, const bool pretty_print,
- const bool ensure_ascii,
- const unsigned int indent_step,
- const unsigned int current_indent = 0)
+ while (rest < dist
+ and delta - rest >= ten_k
+ and (rest + ten_k < dist or dist - rest > rest + ten_k - dist))
{
- switch (val.m_type)
- {
- case value_t::object:
- {
- if (val.m_value.object->empty())
- {
- o->write_characters("{}", 2);
- return;
- }
-
- if (pretty_print)
- {
- o->write_characters("{\n", 2);
-
- // variable to hold indentation for recursive calls
- const auto new_indent = current_indent + indent_step;
- if (JSON_UNLIKELY(indent_string.size() < new_indent))
- {
- indent_string.resize(indent_string.size() * 2, ' ');
- }
-
- // first n-1 elements
- auto i = val.m_value.object->cbegin();
- for (std::size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
- {
- o->write_characters(indent_string.c_str(), new_indent);
- o->write_character('\"');
- dump_escaped(i->first, ensure_ascii);
- o->write_characters("\": ", 3);
- dump(i->second, true, ensure_ascii, indent_step, new_indent);
- o->write_characters(",\n", 2);
- }
-
- // last element
- assert(i != val.m_value.object->cend());
- assert(std::next(i) == val.m_value.object->cend());
- o->write_characters(indent_string.c_str(), new_indent);
- o->write_character('\"');
- dump_escaped(i->first, ensure_ascii);
- o->write_characters("\": ", 3);
- dump(i->second, true, ensure_ascii, indent_step, new_indent);
-
- o->write_character('\n');
- o->write_characters(indent_string.c_str(), current_indent);
- o->write_character('}');
- }
- else
- {
- o->write_character('{');
-
- // first n-1 elements
- auto i = val.m_value.object->cbegin();
- for (std::size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
- {
- o->write_character('\"');
- dump_escaped(i->first, ensure_ascii);
- o->write_characters("\":", 2);
- dump(i->second, false, ensure_ascii, indent_step, current_indent);
- o->write_character(',');
- }
+ assert(buf[len - 1] != '0');
+ buf[len - 1]--;
+ rest += ten_k;
+ }
+}
- // last element
- assert(i != val.m_value.object->cend());
- assert(std::next(i) == val.m_value.object->cend());
- o->write_character('\"');
- dump_escaped(i->first, ensure_ascii);
- o->write_characters("\":", 2);
- dump(i->second, false, ensure_ascii, indent_step, current_indent);
+/*!
+Generates V = buffer * 10^decimal_exponent, such that M- <= V <= M+.
+M- and M+ must be normalized and share the same exponent -60 <= e <= -32.
+*/
+inline void grisu2_digit_gen(char* buffer, int& length, int& decimal_exponent,
+ diyfp M_minus, diyfp w, diyfp M_plus)
+{
+ static_assert(kAlpha >= -60, "internal error");
+ static_assert(kGamma <= -32, "internal error");
- o->write_character('}');
- }
+ // Generates the digits (and the exponent) of a decimal floating-point
+ // number V = buffer * 10^decimal_exponent in the range [M-, M+]. The diyfp's
+ // w, M- and M+ share the same exponent e, which satisfies alpha <= e <= gamma.
+ //
+ // <--------------------------- delta ---->
+ // <---- dist --------->
+ // --------------[------------------+-------------------]--------------
+ // M- w M+
+ //
+ // Grisu2 generates the digits of M+ from left to right and stops as soon as
+ // V is in [M-,M+].
- return;
- }
+ assert(M_plus.e >= kAlpha);
+ assert(M_plus.e <= kGamma);
- case value_t::array:
- {
- if (val.m_value.array->empty())
- {
- o->write_characters("[]", 2);
- return;
- }
+ std::uint64_t delta = diyfp::sub(M_plus, M_minus).f; // (significand of (M+ - M-), implicit exponent is e)
+ std::uint64_t dist = diyfp::sub(M_plus, w ).f; // (significand of (M+ - w ), implicit exponent is e)
- if (pretty_print)
- {
- o->write_characters("[\n", 2);
+ // Split M+ = f * 2^e into two parts p1 and p2 (note: e < 0):
+ //
+ // M+ = f * 2^e
+ // = ((f div 2^-e) * 2^-e + (f mod 2^-e)) * 2^e
+ // = ((p1 ) * 2^-e + (p2 )) * 2^e
+ // = p1 + p2 * 2^e
- // variable to hold indentation for recursive calls
- const auto new_indent = current_indent + indent_step;
- if (JSON_UNLIKELY(indent_string.size() < new_indent))
- {
- indent_string.resize(indent_string.size() * 2, ' ');
- }
+ const diyfp one(std::uint64_t{1} << -M_plus.e, M_plus.e);
- // first n-1 elements
- for (auto i = val.m_value.array->cbegin();
- i != val.m_value.array->cend() - 1; ++i)
- {
- o->write_characters(indent_string.c_str(), new_indent);
- dump(*i, true, ensure_ascii, indent_step, new_indent);
- o->write_characters(",\n", 2);
- }
+ auto p1 = static_cast<std::uint32_t>(M_plus.f >> -one.e); // p1 = f div 2^-e (Since -e >= 32, p1 fits into a 32-bit int.)
+ std::uint64_t p2 = M_plus.f & (one.f - 1); // p2 = f mod 2^-e
- // last element
- assert(not val.m_value.array->empty());
- o->write_characters(indent_string.c_str(), new_indent);
- dump(val.m_value.array->back(), true, ensure_ascii, indent_step, new_indent);
+ // 1)
+ //
+ // Generate the digits of the integral part p1 = d[n-1]...d[1]d[0]
- o->write_character('\n');
- o->write_characters(indent_string.c_str(), current_indent);
- o->write_character(']');
- }
- else
- {
- o->write_character('[');
+ assert(p1 > 0);
- // first n-1 elements
- for (auto i = val.m_value.array->cbegin();
- i != val.m_value.array->cend() - 1; ++i)
- {
- dump(*i, false, ensure_ascii, indent_step, current_indent);
- o->write_character(',');
- }
+ std::uint32_t pow10;
+ const int k = find_largest_pow10(p1, pow10);
- // last element
- assert(not val.m_value.array->empty());
- dump(val.m_value.array->back(), false, ensure_ascii, indent_step, current_indent);
+ // 10^(k-1) <= p1 < 10^k, pow10 = 10^(k-1)
+ //
+ // p1 = (p1 div 10^(k-1)) * 10^(k-1) + (p1 mod 10^(k-1))
+ // = (d[k-1] ) * 10^(k-1) + (p1 mod 10^(k-1))
+ //
+ // M+ = p1 + p2 * 2^e
+ // = d[k-1] * 10^(k-1) + (p1 mod 10^(k-1)) + p2 * 2^e
+ // = d[k-1] * 10^(k-1) + ((p1 mod 10^(k-1)) * 2^-e + p2) * 2^e
+ // = d[k-1] * 10^(k-1) + ( rest) * 2^e
+ //
+ // Now generate the digits d[n] of p1 from left to right (n = k-1,...,0)
+ //
+ // p1 = d[k-1]...d[n] * 10^n + d[n-1]...d[0]
+ //
+ // but stop as soon as
+ //
+ // rest * 2^e = (d[n-1]...d[0] * 2^-e + p2) * 2^e <= delta * 2^e
- o->write_character(']');
- }
+ int n = k;
+ while (n > 0)
+ {
+ // Invariants:
+ // M+ = buffer * 10^n + (p1 + p2 * 2^e) (buffer = 0 for n = k)
+ // pow10 = 10^(n-1) <= p1 < 10^n
+ //
+ const std::uint32_t d = p1 / pow10; // d = p1 div 10^(n-1)
+ const std::uint32_t r = p1 % pow10; // r = p1 mod 10^(n-1)
+ //
+ // M+ = buffer * 10^n + (d * 10^(n-1) + r) + p2 * 2^e
+ // = (buffer * 10 + d) * 10^(n-1) + (r + p2 * 2^e)
+ //
+ assert(d <= 9);
+ buffer[length++] = static_cast<char>('0' + d); // buffer := buffer * 10 + d
+ //
+ // M+ = buffer * 10^(n-1) + (r + p2 * 2^e)
+ //
+ p1 = r;
+ n--;
+ //
+ // M+ = buffer * 10^n + (p1 + p2 * 2^e)
+ // pow10 = 10^n
+ //
- return;
- }
+ // Now check if enough digits have been generated.
+ // Compute
+ //
+ // p1 + p2 * 2^e = (p1 * 2^-e + p2) * 2^e = rest * 2^e
+ //
+ // Note:
+ // Since rest and delta share the same exponent e, it suffices to
+ // compare the significands.
+ const std::uint64_t rest = (std::uint64_t{p1} << -one.e) + p2;
+ if (rest <= delta)
+ {
+ // V = buffer * 10^n, with M- <= V <= M+.
- case value_t::string:
- {
- o->write_character('\"');
- dump_escaped(*val.m_value.string, ensure_ascii);
- o->write_character('\"');
- return;
- }
+ decimal_exponent += n;
- case value_t::boolean:
- {
- if (val.m_value.boolean)
- {
- o->write_characters("true", 4);
- }
- else
- {
- o->write_characters("false", 5);
- }
- return;
- }
+ // We may now just stop. But instead look if the buffer could be
+ // decremented to bring V closer to w.
+ //
+ // pow10 = 10^n is now 1 ulp in the decimal representation V.
+ // The rounding procedure works with diyfp's with an implicit
+ // exponent of e.
+ //
+ // 10^n = (10^n * 2^-e) * 2^e = ulp * 2^e
+ //
+ const std::uint64_t ten_n = std::uint64_t{pow10} << -one.e;
+ grisu2_round(buffer, length, dist, delta, rest, ten_n);
- case value_t::number_integer:
- {
- dump_integer(val.m_value.number_integer);
- return;
- }
+ return;
+ }
- case value_t::number_unsigned:
- {
- dump_integer(val.m_value.number_unsigned);
- return;
- }
+ pow10 /= 10;
+ //
+ // pow10 = 10^(n-1) <= p1 < 10^n
+ // Invariants restored.
+ }
- case value_t::number_float:
- {
- dump_float(val.m_value.number_float);
- return;
- }
+ // 2)
+ //
+ // The digits of the integral part have been generated:
+ //
+ // M+ = d[k-1]...d[1]d[0] + p2 * 2^e
+ // = buffer + p2 * 2^e
+ //
+ // Now generate the digits of the fractional part p2 * 2^e.
+ //
+ // Note:
+ // No decimal point is generated: the exponent is adjusted instead.
+ //
+ // p2 actually represents the fraction
+ //
+ // p2 * 2^e
+ // = p2 / 2^-e
+ // = d[-1] / 10^1 + d[-2] / 10^2 + ...
+ //
+ // Now generate the digits d[-m] of p1 from left to right (m = 1,2,...)
+ //
+ // p2 * 2^e = d[-1]d[-2]...d[-m] * 10^-m
+ // + 10^-m * (d[-m-1] / 10^1 + d[-m-2] / 10^2 + ...)
+ //
+ // using
+ //
+ // 10^m * p2 = ((10^m * p2) div 2^-e) * 2^-e + ((10^m * p2) mod 2^-e)
+ // = ( d) * 2^-e + ( r)
+ //
+ // or
+ // 10^m * p2 * 2^e = d + r * 2^e
+ //
+ // i.e.
+ //
+ // M+ = buffer + p2 * 2^e
+ // = buffer + 10^-m * (d + r * 2^e)
+ // = (buffer * 10^m + d) * 10^-m + 10^-m * r * 2^e
+ //
+ // and stop as soon as 10^-m * r * 2^e <= delta * 2^e
- case value_t::discarded:
- {
- o->write_characters("<discarded>", 11);
- return;
- }
+ assert(p2 > delta);
+
+ int m = 0;
+ for (;;)
+ {
+ // Invariant:
+ // M+ = buffer * 10^-m + 10^-m * (d[-m-1] / 10 + d[-m-2] / 10^2 + ...) * 2^e
+ // = buffer * 10^-m + 10^-m * (p2 ) * 2^e
+ // = buffer * 10^-m + 10^-m * (1/10 * (10 * p2) ) * 2^e
+ // = buffer * 10^-m + 10^-m * (1/10 * ((10*p2 div 2^-e) * 2^-e + (10*p2 mod 2^-e)) * 2^e
+ //
+ assert(p2 <= (std::numeric_limits<std::uint64_t>::max)() / 10);
+ p2 *= 10;
+ const std::uint64_t d = p2 >> -one.e; // d = (10 * p2) div 2^-e
+ const std::uint64_t r = p2 & (one.f - 1); // r = (10 * p2) mod 2^-e
+ //
+ // M+ = buffer * 10^-m + 10^-m * (1/10 * (d * 2^-e + r) * 2^e
+ // = buffer * 10^-m + 10^-m * (1/10 * (d + r * 2^e))
+ // = (buffer * 10 + d) * 10^(-m-1) + 10^(-m-1) * r * 2^e
+ //
+ assert(d <= 9);
+ buffer[length++] = static_cast<char>('0' + d); // buffer := buffer * 10 + d
+ //
+ // M+ = buffer * 10^(-m-1) + 10^(-m-1) * r * 2^e
+ //
+ p2 = r;
+ m++;
+ //
+ // M+ = buffer * 10^-m + 10^-m * p2 * 2^e
+ // Invariant restored.
- case value_t::null:
- {
- o->write_characters("null", 4);
- return;
- }
+ // Check if enough digits have been generated.
+ //
+ // 10^-m * p2 * 2^e <= delta * 2^e
+ // p2 * 2^e <= 10^m * delta * 2^e
+ // p2 <= 10^m * delta
+ delta *= 10;
+ dist *= 10;
+ if (p2 <= delta)
+ {
+ break;
}
}
- private:
- /*!
- @brief dump escaped string
-
- Escape a string by replacing certain special characters by a sequence of an
- escape character (backslash) and another character and other control
- characters by a sequence of "\u" followed by a four-digit hex
- representation. The escaped string is written to output stream @a o.
+ // V = buffer * 10^-m, with M- <= V <= M+.
- @param[in] s the string to escape
- @param[in] ensure_ascii whether to escape non-ASCII characters with
- \uXXXX sequences
+ decimal_exponent -= m;
- @complexity Linear in the length of string @a s.
- */
- void dump_escaped(const string_t& s, const bool ensure_ascii)
- {
- uint32_t codepoint;
- uint8_t state = UTF8_ACCEPT;
- std::size_t bytes = 0; // number of bytes written to string_buffer
+ // 1 ulp in the decimal representation is now 10^-m.
+ // Since delta and dist are now scaled by 10^m, we need to do the
+ // same with ulp in order to keep the units in sync.
+ //
+ // 10^m * 10^-m = 1 = 2^-e * 2^e = ten_m * 2^e
+ //
+ const std::uint64_t ten_m = one.f;
+ grisu2_round(buffer, length, dist, delta, p2, ten_m);
- for (std::size_t i = 0; i < s.size(); ++i)
- {
- const auto byte = static_cast<uint8_t>(s[i]);
+ // By construction this algorithm generates the shortest possible decimal
+ // number (Loitsch, Theorem 6.2) which rounds back to w.
+ // For an input number of precision p, at least
+ //
+ // N = 1 + ceil(p * log_10(2))
+ //
+ // decimal digits are sufficient to identify all binary floating-point
+ // numbers (Matula, "In-and-Out conversions").
+ // This implies that the algorithm does not produce more than N decimal
+ // digits.
+ //
+ // N = 17 for p = 53 (IEEE double precision)
+ // N = 9 for p = 24 (IEEE single precision)
+}
- switch (decode(state, codepoint, byte))
- {
- case UTF8_ACCEPT: // decode found a new code point
- {
- switch (codepoint)
- {
- case 0x08: // backspace
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = 'b';
- break;
- }
+/*!
+v = buf * 10^decimal_exponent
+len is the length of the buffer (number of decimal digits)
+The buffer must be large enough, i.e. >= max_digits10.
+*/
+JSON_HEDLEY_NON_NULL(1)
+inline void grisu2(char* buf, int& len, int& decimal_exponent,
+ diyfp m_minus, diyfp v, diyfp m_plus)
+{
+ assert(m_plus.e == m_minus.e);
+ assert(m_plus.e == v.e);
- case 0x09: // horizontal tab
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = 't';
- break;
- }
+ // --------(-----------------------+-----------------------)-------- (A)
+ // m- v m+
+ //
+ // --------------------(-----------+-----------------------)-------- (B)
+ // m- v m+
+ //
+ // First scale v (and m- and m+) such that the exponent is in the range
+ // [alpha, gamma].
- case 0x0A: // newline
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = 'n';
- break;
- }
+ const cached_power cached = get_cached_power_for_binary_exponent(m_plus.e);
- case 0x0C: // formfeed
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = 'f';
- break;
- }
+ const diyfp c_minus_k(cached.f, cached.e); // = c ~= 10^-k
- case 0x0D: // carriage return
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = 'r';
- break;
- }
+ // The exponent of the products is = v.e + c_minus_k.e + q and is in the range [alpha,gamma]
+ const diyfp w = diyfp::mul(v, c_minus_k);
+ const diyfp w_minus = diyfp::mul(m_minus, c_minus_k);
+ const diyfp w_plus = diyfp::mul(m_plus, c_minus_k);
- case 0x22: // quotation mark
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = '\"';
- break;
- }
+ // ----(---+---)---------------(---+---)---------------(---+---)----
+ // w- w w+
+ // = c*m- = c*v = c*m+
+ //
+ // diyfp::mul rounds its result and c_minus_k is approximated too. w, w- and
+ // w+ are now off by a small amount.
+ // In fact:
+ //
+ // w - v * 10^k < 1 ulp
+ //
+ // To account for this inaccuracy, add resp. subtract 1 ulp.
+ //
+ // --------+---[---------------(---+---)---------------]---+--------
+ // w- M- w M+ w+
+ //
+ // Now any number in [M-, M+] (bounds included) will round to w when input,
+ // regardless of how the input rounding algorithm breaks ties.
+ //
+ // And digit_gen generates the shortest possible such number in [M-, M+].
+ // Note that this does not mean that Grisu2 always generates the shortest
+ // possible number in the interval (m-, m+).
+ const diyfp M_minus(w_minus.f + 1, w_minus.e);
+ const diyfp M_plus (w_plus.f - 1, w_plus.e );
- case 0x5C: // reverse solidus
- {
- string_buffer[bytes++] = '\\';
- string_buffer[bytes++] = '\\';
- break;
- }
+ decimal_exponent = -cached.k; // = -(-k) = k
- default:
- {
- // escape control characters (0x00..0x1F) or, if
- // ensure_ascii parameter is used, non-ASCII characters
- if ((codepoint <= 0x1F) or (ensure_ascii and (codepoint >= 0x7F)))
- {
- if (codepoint <= 0xFFFF)
- {
- std::snprintf(string_buffer.data() + bytes, 7, "\\u%04x",
- static_cast<uint16_t>(codepoint));
- bytes += 6;
- }
- else
- {
- std::snprintf(string_buffer.data() + bytes, 13, "\\u%04x\\u%04x",
- static_cast<uint16_t>(0xD7C0 + (codepoint >> 10)),
- static_cast<uint16_t>(0xDC00 + (codepoint & 0x3FF)));
- bytes += 12;
- }
- }
- else
- {
- // copy byte to buffer (all previous bytes
- // been copied have in default case above)
- string_buffer[bytes++] = s[i];
- }
- break;
- }
- }
+ grisu2_digit_gen(buf, len, decimal_exponent, M_minus, w, M_plus);
+}
- // write buffer and reset index; there must be 13 bytes
- // left, as this is the maximal number of bytes to be
- // written ("\uxxxx\uxxxx\0") for one code point
- if (string_buffer.size() - bytes < 13)
- {
- o->write_characters(string_buffer.data(), bytes);
- bytes = 0;
- }
- break;
- }
+/*!
+v = buf * 10^decimal_exponent
+len is the length of the buffer (number of decimal digits)
+The buffer must be large enough, i.e. >= max_digits10.
+*/
+template <typename FloatType>
+JSON_HEDLEY_NON_NULL(1)
+void grisu2(char* buf, int& len, int& decimal_exponent, FloatType value)
+{
+ static_assert(diyfp::kPrecision >= std::numeric_limits<FloatType>::digits + 3,
+ "internal error: not enough precision");
- case UTF8_REJECT: // decode found invalid UTF-8 byte
- {
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << static_cast<int>(byte);
- JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + ss.str()));
- }
+ assert(std::isfinite(value));
+ assert(value > 0);
- default: // decode found yet incomplete multi-byte code point
- {
- if (not ensure_ascii)
- {
- // code point will not be escaped - copy byte to buffer
- string_buffer[bytes++] = s[i];
- }
- break;
- }
- }
- }
+ // If the neighbors (and boundaries) of 'value' are always computed for double-precision
+ // numbers, all float's can be recovered using strtod (and strtof). However, the resulting
+ // decimal representations are not exactly "short".
+ //
+ // The documentation for 'std::to_chars' (https://en.cppreference.com/w/cpp/utility/to_chars)
+ // says "value is converted to a string as if by std::sprintf in the default ("C") locale"
+ // and since sprintf promotes float's to double's, I think this is exactly what 'std::to_chars'
+ // does.
+ // On the other hand, the documentation for 'std::to_chars' requires that "parsing the
+ // representation using the corresponding std::from_chars function recovers value exactly". That
+ // indicates that single precision floating-point numbers should be recovered using
+ // 'std::strtof'.
+ //
+ // NB: If the neighbors are computed for single-precision numbers, there is a single float
+ // (7.0385307e-26f) which can't be recovered using strtod. The resulting double precision
+ // value is off by 1 ulp.
+#if 0
+ const boundaries w = compute_boundaries(static_cast<double>(value));
+#else
+ const boundaries w = compute_boundaries(value);
+#endif
- if (JSON_LIKELY(state == UTF8_ACCEPT))
- {
- // write buffer
- if (bytes > 0)
- {
- o->write_characters(string_buffer.data(), bytes);
- }
- }
- else
- {
- // we finish reading, but do not accept: string was incomplete
- std::stringstream ss;
- ss << std::setw(2) << std::uppercase << std::setfill('0') << std::hex << static_cast<int>(static_cast<uint8_t>(s.back()));
- JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + ss.str()));
- }
- }
+ grisu2(buf, len, decimal_exponent, w.minus, w.w, w.plus);
+}
- /*!
- @brief dump an integer
+/*!
+@brief appends a decimal representation of e to buf
+@return a pointer to the element following the exponent.
+@pre -1000 < e < 1000
+*/
+JSON_HEDLEY_NON_NULL(1)
+JSON_HEDLEY_RETURNS_NON_NULL
+inline char* append_exponent(char* buf, int e)
+{
+ assert(e > -1000);
+ assert(e < 1000);
- Dump a given integer to output stream @a o. Works internally with
- @a number_buffer.
+ if (e < 0)
+ {
+ e = -e;
+ *buf++ = '-';
+ }
+ else
+ {
+ *buf++ = '+';
+ }
- @param[in] x integer number (signed or unsigned) to dump
- @tparam NumberType either @a number_integer_t or @a number_unsigned_t
- */
- template<typename NumberType, detail::enable_if_t<
- std::is_same<NumberType, number_unsigned_t>::value or
- std::is_same<NumberType, number_integer_t>::value,
- int> = 0>
- void dump_integer(NumberType x)
+ auto k = static_cast<std::uint32_t>(e);
+ if (k < 10)
{
- // special case for "0"
- if (x == 0)
- {
- o->write_character('0');
- return;
- }
+ // Always print at least two digits in the exponent.
+ // This is for compatibility with printf("%g").
+ *buf++ = '0';
+ *buf++ = static_cast<char>('0' + k);
+ }
+ else if (k < 100)
+ {
+ *buf++ = static_cast<char>('0' + k / 10);
+ k %= 10;
+ *buf++ = static_cast<char>('0' + k);
+ }
+ else
+ {
+ *buf++ = static_cast<char>('0' + k / 100);
+ k %= 100;
+ *buf++ = static_cast<char>('0' + k / 10);
+ k %= 10;
+ *buf++ = static_cast<char>('0' + k);
+ }
- const bool is_negative = (x <= 0) and (x != 0); // see issue #755
- std::size_t i = 0;
+ return buf;
+}
- while (x != 0)
- {
- // spare 1 byte for '\0'
- assert(i < number_buffer.size() - 1);
+/*!
+@brief prettify v = buf * 10^decimal_exponent
- const auto digit = std::labs(static_cast<long>(x % 10));
- number_buffer[i++] = static_cast<char>('0' + digit);
- x /= 10;
- }
+If v is in the range [10^min_exp, 10^max_exp) it will be printed in fixed-point
+notation. Otherwise it will be printed in exponential notation.
- if (is_negative)
- {
- // make sure there is capacity for the '-'
- assert(i < number_buffer.size() - 2);
- number_buffer[i++] = '-';
- }
+@pre min_exp < 0
+@pre max_exp > 0
+*/
+JSON_HEDLEY_NON_NULL(1)
+JSON_HEDLEY_RETURNS_NON_NULL
+inline char* format_buffer(char* buf, int len, int decimal_exponent,
+ int min_exp, int max_exp)
+{
+ assert(min_exp < 0);
+ assert(max_exp > 0);
- std::reverse(number_buffer.begin(), number_buffer.begin() + i);
- o->write_characters(number_buffer.data(), i);
- }
+ const int k = len;
+ const int n = len + decimal_exponent;
- /*!
- @brief dump a floating-point number
+ // v = buf * 10^(n-k)
+ // k is the length of the buffer (number of decimal digits)
+ // n is the position of the decimal point relative to the start of the buffer.
- Dump a given floating-point number to output stream @a o. Works internally
- with @a number_buffer.
+ if (k <= n and n <= max_exp)
+ {
+ // digits[000]
+ // len <= max_exp + 2
- @param[in] x floating-point number to dump
- */
- void dump_float(number_float_t x)
+ std::memset(buf + k, '0', static_cast<size_t>(n) - static_cast<size_t>(k));
+ // Make it look like a floating-point number (#362, #378)
+ buf[n + 0] = '.';
+ buf[n + 1] = '0';
+ return buf + (static_cast<size_t>(n) + 2);
+ }
+
+ if (0 < n and n <= max_exp)
{
- // NaN / inf
- if (not std::isfinite(x))
- {
- o->write_characters("null", 4);
- return;
- }
+ // dig.its
+ // len <= max_digits10 + 1
- // If number_float_t is an IEEE-754 single or double precision number,
- // use the Grisu2 algorithm to produce short numbers which are
- // guaranteed to round-trip, using strtof and strtod, resp.
- //
- // NB: The test below works if <long double> == <double>.
- static constexpr bool is_ieee_single_or_double
- = (std::numeric_limits<number_float_t>::is_iec559 and std::numeric_limits<number_float_t>::digits == 24 and std::numeric_limits<number_float_t>::max_exponent == 128) or
- (std::numeric_limits<number_float_t>::is_iec559 and std::numeric_limits<number_float_t>::digits == 53 and std::numeric_limits<number_float_t>::max_exponent == 1024);
+ assert(k > n);
- dump_float(x, std::integral_constant<bool, is_ieee_single_or_double>());
+ std::memmove(buf + (static_cast<size_t>(n) + 1), buf + n, static_cast<size_t>(k) - static_cast<size_t>(n));
+ buf[n] = '.';
+ return buf + (static_cast<size_t>(k) + 1U);
}
- void dump_float(number_float_t x, std::true_type /*is_ieee_single_or_double*/)
+ if (min_exp < n and n <= 0)
{
- char* begin = number_buffer.data();
- char* end = ::nlohmann::detail::to_chars(begin, begin + number_buffer.size(), x);
+ // 0.[000]digits
+ // len <= 2 + (-min_exp - 1) + max_digits10
- o->write_characters(begin, static_cast<size_t>(end - begin));
+ std::memmove(buf + (2 + static_cast<size_t>(-n)), buf, static_cast<size_t>(k));
+ buf[0] = '0';
+ buf[1] = '.';
+ std::memset(buf + 2, '0', static_cast<size_t>(-n));
+ return buf + (2U + static_cast<size_t>(-n) + static_cast<size_t>(k));
}
- void dump_float(number_float_t x, std::false_type /*is_ieee_single_or_double*/)
+ if (k == 1)
{
- // get number of digits for a float -> text -> float round-trip
- static constexpr auto d = std::numeric_limits<number_float_t>::max_digits10;
+ // dE+123
+ // len <= 1 + 5
- // the actual conversion
- std::ptrdiff_t len = snprintf(number_buffer.data(), number_buffer.size(), "%.*g", d, x);
+ buf += 1;
+ }
+ else
+ {
+ // d.igitsE+123
+ // len <= max_digits10 + 1 + 5
- // negative value indicates an error
- assert(len > 0);
- // check if buffer was large enough
- assert(static_cast<std::size_t>(len) < number_buffer.size());
+ std::memmove(buf + 2, buf + 1, static_cast<size_t>(k) - 1);
+ buf[1] = '.';
+ buf += 1 + static_cast<size_t>(k);
+ }
- // erase thousands separator
- if (thousands_sep != '\0')
- {
- const auto end = std::remove(number_buffer.begin(),
- number_buffer.begin() + len, thousands_sep);
- std::fill(end, number_buffer.end(), '\0');
- assert((end - number_buffer.begin()) <= len);
- len = (end - number_buffer.begin());
- }
+ *buf++ = 'e';
+ return append_exponent(buf, n - 1);
+}
- // convert decimal point to '.'
- if (decimal_point != '\0' and decimal_point != '.')
- {
- const auto dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
- if (dec_pos != number_buffer.end())
- {
- *dec_pos = '.';
- }
- }
+} // namespace dtoa_impl
- o->write_characters(number_buffer.data(), static_cast<std::size_t>(len));
+/*!
+@brief generates a decimal representation of the floating-point number value in [first, last).
- // determine if need to append ".0"
- const bool value_is_int_like =
- std::none_of(number_buffer.begin(), number_buffer.begin() + len + 1,
- [](char c)
- {
- return (c == '.' or c == 'e');
- });
+The format of the resulting decimal representation is similar to printf's %g
+format. Returns an iterator pointing past-the-end of the decimal representation.
- if (value_is_int_like)
- {
- o->write_characters(".0", 2);
- }
- }
+@note The input number must be finite, i.e. NaN's and Inf's are not supported.
+@note The buffer must be large enough.
+@note The result is NOT null-terminated.
+*/
+template <typename FloatType>
+JSON_HEDLEY_NON_NULL(1, 2)
+JSON_HEDLEY_RETURNS_NON_NULL
+char* to_chars(char* first, const char* last, FloatType value)
+{
+ static_cast<void>(last); // maybe unused - fix warning
+ assert(std::isfinite(value));
- /*!
- @brief check whether a string is UTF-8 encoded
+ // Use signbit(value) instead of (value < 0) since signbit works for -0.
+ if (std::signbit(value))
+ {
+ value = -value;
+ *first++ = '-';
+ }
- The function checks each byte of a string whether it is UTF-8 encoded. The
- result of the check is stored in the @a state parameter. The function must
- be called initially with state 0 (accept). State 1 means the string must
- be rejected, because the current byte is not allowed. If the string is
- completely processed, but the state is non-zero, the string ended
- prematurely; that is, the last byte indicated more bytes should have
- followed.
+ if (value == 0) // +-0
+ {
+ *first++ = '0';
+ // Make it look like a floating-point number (#362, #378)
+ *first++ = '.';
+ *first++ = '0';
+ return first;
+ }
- @param[in,out] state the state of the decoding
- @param[in,out] codep codepoint (valid only if resulting state is UTF8_ACCEPT)
- @param[in] byte next byte to decode
- @return new state
+ assert(last - first >= std::numeric_limits<FloatType>::max_digits10);
- @note The function has been edited: a std::array is used.
+ // Compute v = buffer * 10^decimal_exponent.
+ // The decimal digits are stored in the buffer, which needs to be interpreted
+ // as an unsigned decimal integer.
+ // len is the length of the buffer, i.e. the number of decimal digits.
+ int len = 0;
+ int decimal_exponent = 0;
+ dtoa_impl::grisu2(first, len, decimal_exponent, value);
- @copyright Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
- @sa http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
- */
- static uint8_t decode(uint8_t& state, uint32_t& codep, const uint8_t byte) noexcept
- {
- static const std::array<uint8_t, 400> utf8d =
- {
- {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 00..1F
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20..3F
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 40..5F
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 60..7F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 80..9F
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, // A0..BF
- 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // C0..DF
- 0xA, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x4, 0x3, 0x3, // E0..EF
- 0xB, 0x6, 0x6, 0x6, 0x5, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, // F0..FF
- 0x0, 0x1, 0x2, 0x3, 0x5, 0x8, 0x7, 0x1, 0x1, 0x1, 0x4, 0x6, 0x1, 0x1, 0x1, 0x1, // s0..s0
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, // s1..s2
- 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, // s3..s4
- 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, // s5..s6
- 1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // s7..s8
- }
- };
+ assert(len <= std::numeric_limits<FloatType>::max_digits10);
- const uint8_t type = utf8d[byte];
+ // Format the buffer like printf("%.*g", prec, value)
+ constexpr int kMinExp = -4;
+ // Use digits10 here to increase compatibility with version 2.
+ constexpr int kMaxExp = std::numeric_limits<FloatType>::digits10;
- codep = (state != UTF8_ACCEPT)
- ? (byte & 0x3fu) | (codep << 6)
- : static_cast<uint32_t>(0xff >> type) & (byte);
+ assert(last - first >= kMaxExp + 2);
+ assert(last - first >= 2 + (-kMinExp - 1) + std::numeric_limits<FloatType>::max_digits10);
+ assert(last - first >= std::numeric_limits<FloatType>::max_digits10 + 6);
- state = utf8d[256u + state * 16u + type];
- return state;
- }
+ return dtoa_impl::format_buffer(first, len, decimal_exponent, kMinExp, kMaxExp);
+}
- private:
- /// the output of the serializer
- output_adapter_t<char> o = nullptr;
+} // namespace detail
+} // namespace nlohmann
- /// a (hopefully) large enough character buffer
- std::array<char, 64> number_buffer{{}};
+// #include <nlohmann/detail/exceptions.hpp>
- /// the locale
- const std::lconv* loc = nullptr;
- /// the locale's thousand separator character
- const char thousands_sep = '\0';
- /// the locale's decimal point character
- const char decimal_point = '\0';
+// #include <nlohmann/detail/macro_scope.hpp>
- /// string buffer
- std::array<char, 512> string_buffer{{}};
+// #include <nlohmann/detail/meta/cpp_future.hpp>
- /// the indentation character
- const char indent_char;
- /// the indentation string
- string_t indent_string;
-};
-}
-}
+// #include <nlohmann/detail/output/binary_writer.hpp>
-// #include <nlohmann/detail/json_ref.hpp>
+// #include <nlohmann/detail/output/output_adapters.hpp>
+// #include <nlohmann/detail/value_t.hpp>
-#include <initializer_list>
-#include <utility>
namespace nlohmann
{
namespace detail
{
+///////////////////
+// serialization //
+///////////////////
+
+/// how to treat decoding errors
+enum class error_handler_t
+{
+ strict, ///< throw a type_error exception in case of invalid UTF-8
+ replace, ///< replace invalid UTF-8 sequences with U+FFFD
+ ignore ///< ignore invalid UTF-8 sequences
+};
+
template<typename BasicJsonType>
-class json_ref
+class serializer
{
- public:
- using value_type = BasicJsonType;
+ using string_t = typename BasicJsonType::string_t;
+ using number_float_t = typename BasicJsonType::number_float_t;
+ using number_integer_t = typename BasicJsonType::number_integer_t;
+ using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
+ using binary_char_t = typename BasicJsonType::binary_t::value_type;
+ static constexpr std::uint8_t UTF8_ACCEPT = 0;
+ static constexpr std::uint8_t UTF8_REJECT = 1;
- json_ref(value_type&& value)
- : owned_value(std::move(value)), value_ref(&owned_value), is_rvalue(true)
+ public:
+ /*!
+ @param[in] s output stream to serialize to
+ @param[in] ichar indentation character to use
+ @param[in] error_handler_ how to react on decoding errors
+ */
+ serializer(output_adapter_t<char> s, const char ichar,
+ error_handler_t error_handler_ = error_handler_t::strict)
+ : o(std::move(s))
+ , loc(std::localeconv())
+ , thousands_sep(loc->thousands_sep == nullptr ? '\0' : * (loc->thousands_sep))
+ , decimal_point(loc->decimal_point == nullptr ? '\0' : * (loc->decimal_point))
+ , indent_char(ichar)
+ , indent_string(512, indent_char)
+ , error_handler(error_handler_)
{}
- json_ref(const value_type& value)
- : value_ref(const_cast<value_type*>(&value)), is_rvalue(false)
- {}
+ // delete because of pointer members
+ serializer(const serializer&) = delete;
+ serializer& operator=(const serializer&) = delete;
+ serializer(serializer&&) = delete;
+ serializer& operator=(serializer&&) = delete;
+ ~serializer() = default;
- json_ref(std::initializer_list<json_ref> init)
- : owned_value(init), value_ref(&owned_value), is_rvalue(true)
- {}
+ /*!
+ @brief internal implementation of the serialization function
- template<class... Args>
- json_ref(Args&& ... args)
- : owned_value(std::forward<Args>(args)...), value_ref(&owned_value), is_rvalue(true)
- {}
+ This function is called by the public member function dump and organizes
+ the serialization internally. The indentation level is propagated as
+ additional parameter. In case of arrays and objects, the function is
+ called recursively.
- // class should be movable only
- json_ref(json_ref&&) = default;
- json_ref(const json_ref&) = delete;
- json_ref& operator=(const json_ref&) = delete;
+ - strings and object keys are escaped using `escape_string()`
+ - integer numbers are converted implicitly via `operator<<`
+ - floating-point numbers are converted to a string using `"%g"` format
+ - binary values are serialized as objects containing the subtype and the
+ byte array
- value_type moved_or_copied() const
+ @param[in] val value to serialize
+ @param[in] pretty_print whether the output shall be pretty-printed
+ @param[in] ensure_ascii If @a ensure_ascii is true, all non-ASCII characters
+ in the output are escaped with `\uXXXX` sequences, and the result consists
+ of ASCII characters only.
+ @param[in] indent_step the indent level
+ @param[in] current_indent the current indent level (only used internally)
+ */
+ void dump(const BasicJsonType& val,
+ const bool pretty_print,
+ const bool ensure_ascii,
+ const unsigned int indent_step,
+ const unsigned int current_indent = 0)
{
- if (is_rvalue)
+ switch (val.m_type)
{
- return std::move(*value_ref);
- }
- return *value_ref;
- }
+ case value_t::object:
+ {
+ if (val.m_value.object->empty())
+ {
+ o->write_characters("{}", 2);
+ return;
+ }
- value_type const& operator*() const
- {
- return *static_cast<value_type const*>(value_ref);
- }
+ if (pretty_print)
+ {
+ o->write_characters("{\n", 2);
- value_type const* operator->() const
- {
- return static_cast<value_type const*>(value_ref);
- }
+ // variable to hold indentation for recursive calls
+ const auto new_indent = current_indent + indent_step;
+ if (JSON_HEDLEY_UNLIKELY(indent_string.size() < new_indent))
+ {
+ indent_string.resize(indent_string.size() * 2, ' ');
+ }
- private:
- mutable value_type owned_value = nullptr;
- value_type* value_ref = nullptr;
- const bool is_rvalue;
-};
-}
-}
+ // first n-1 elements
+ auto i = val.m_value.object->cbegin();
+ for (std::size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
+ {
+ o->write_characters(indent_string.c_str(), new_indent);
+ o->write_character('\"');
+ dump_escaped(i->first, ensure_ascii);
+ o->write_characters("\": ", 3);
+ dump(i->second, true, ensure_ascii, indent_step, new_indent);
+ o->write_characters(",\n", 2);
+ }
-// #include <nlohmann/detail/json_pointer.hpp>
+ // last element
+ assert(i != val.m_value.object->cend());
+ assert(std::next(i) == val.m_value.object->cend());
+ o->write_characters(indent_string.c_str(), new_indent);
+ o->write_character('\"');
+ dump_escaped(i->first, ensure_ascii);
+ o->write_characters("\": ", 3);
+ dump(i->second, true, ensure_ascii, indent_step, new_indent);
+ o->write_character('\n');
+ o->write_characters(indent_string.c_str(), current_indent);
+ o->write_character('}');
+ }
+ else
+ {
+ o->write_character('{');
-#include <cassert> // assert
-#include <numeric> // accumulate
-#include <string> // string
-#include <vector> // vector
+ // first n-1 elements
+ auto i = val.m_value.object->cbegin();
+ for (std::size_t cnt = 0; cnt < val.m_value.object->size() - 1; ++cnt, ++i)
+ {
+ o->write_character('\"');
+ dump_escaped(i->first, ensure_ascii);
+ o->write_characters("\":", 2);
+ dump(i->second, false, ensure_ascii, indent_step, current_indent);
+ o->write_character(',');
+ }
-// #include <nlohmann/detail/macro_scope.hpp>
+ // last element
+ assert(i != val.m_value.object->cend());
+ assert(std::next(i) == val.m_value.object->cend());
+ o->write_character('\"');
+ dump_escaped(i->first, ensure_ascii);
+ o->write_characters("\":", 2);
+ dump(i->second, false, ensure_ascii, indent_step, current_indent);
-// #include <nlohmann/detail/exceptions.hpp>
+ o->write_character('}');
+ }
-// #include <nlohmann/detail/value_t.hpp>
+ return;
+ }
+ case value_t::array:
+ {
+ if (val.m_value.array->empty())
+ {
+ o->write_characters("[]", 2);
+ return;
+ }
-namespace nlohmann
-{
-template<typename BasicJsonType>
-class json_pointer
-{
- // allow basic_json to access private members
- NLOHMANN_BASIC_JSON_TPL_DECLARATION
- friend class basic_json;
+ if (pretty_print)
+ {
+ o->write_characters("[\n", 2);
- public:
- /*!
- @brief create JSON pointer
+ // variable to hold indentation for recursive calls
+ const auto new_indent = current_indent + indent_step;
+ if (JSON_HEDLEY_UNLIKELY(indent_string.size() < new_indent))
+ {
+ indent_string.resize(indent_string.size() * 2, ' ');
+ }
+
+ // first n-1 elements
+ for (auto i = val.m_value.array->cbegin();
+ i != val.m_value.array->cend() - 1; ++i)
+ {
+ o->write_characters(indent_string.c_str(), new_indent);
+ dump(*i, true, ensure_ascii, indent_step, new_indent);
+ o->write_characters(",\n", 2);
+ }
+
+ // last element
+ assert(not val.m_value.array->empty());
+ o->write_characters(indent_string.c_str(), new_indent);
+ dump(val.m_value.array->back(), true, ensure_ascii, indent_step, new_indent);
+
+ o->write_character('\n');
+ o->write_characters(indent_string.c_str(), current_indent);
+ o->write_character(']');
+ }
+ else
+ {
+ o->write_character('[');
+
+ // first n-1 elements
+ for (auto i = val.m_value.array->cbegin();
+ i != val.m_value.array->cend() - 1; ++i)
+ {
+ dump(*i, false, ensure_ascii, indent_step, current_indent);
+ o->write_character(',');
+ }
+
+ // last element
+ assert(not val.m_value.array->empty());
+ dump(val.m_value.array->back(), false, ensure_ascii, indent_step, current_indent);
+
+ o->write_character(']');
+ }
+
+ return;
+ }
+
+ case value_t::string:
+ {
+ o->write_character('\"');
+ dump_escaped(*val.m_value.string, ensure_ascii);
+ o->write_character('\"');
+ return;
+ }
- Create a JSON pointer according to the syntax described in
- [Section 3 of RFC6901](https://tools.ietf.org/html/rfc6901#section-3).
+ case value_t::binary:
+ {
+ if (pretty_print)
+ {
+ o->write_characters("{\n", 2);
- @param[in] s string representing the JSON pointer; if omitted, the empty
- string is assumed which references the whole JSON value
+ // variable to hold indentation for recursive calls
+ const auto new_indent = current_indent + indent_step;
+ if (JSON_HEDLEY_UNLIKELY(indent_string.size() < new_indent))
+ {
+ indent_string.resize(indent_string.size() * 2, ' ');
+ }
- @throw parse_error.107 if the given JSON pointer @a s is nonempty and does
- not begin with a slash (`/`); see example below
+ o->write_characters(indent_string.c_str(), new_indent);
- @throw parse_error.108 if a tilde (`~`) in the given JSON pointer @a s is
- not followed by `0` (representing `~`) or `1` (representing `/`); see
- example below
+ o->write_characters("\"bytes\": [", 10);
- @liveexample{The example shows the construction several valid JSON pointers
- as well as the exceptional behavior.,json_pointer}
+ if (not val.m_value.binary->empty())
+ {
+ for (auto i = val.m_value.binary->cbegin();
+ i != val.m_value.binary->cend() - 1; ++i)
+ {
+ dump_integer(*i);
+ o->write_characters(", ", 2);
+ }
+ dump_integer(val.m_value.binary->back());
+ }
- @since version 2.0.0
- */
- explicit json_pointer(const std::string& s = "")
- : reference_tokens(split(s))
- {}
+ o->write_characters("],\n", 3);
+ o->write_characters(indent_string.c_str(), new_indent);
- /*!
- @brief return a string representation of the JSON pointer
+ o->write_characters("\"subtype\": ", 11);
+ if (val.m_value.binary->has_subtype())
+ {
+ dump_integer(val.m_value.binary->subtype());
+ }
+ else
+ {
+ o->write_characters("null", 4);
+ }
+ o->write_character('\n');
+ o->write_characters(indent_string.c_str(), current_indent);
+ o->write_character('}');
+ }
+ else
+ {
+ o->write_characters("{\"bytes\":[", 10);
- @invariant For each JSON pointer `ptr`, it holds:
- @code {.cpp}
- ptr == json_pointer(ptr.to_string());
- @endcode
+ if (not val.m_value.binary->empty())
+ {
+ for (auto i = val.m_value.binary->cbegin();
+ i != val.m_value.binary->cend() - 1; ++i)
+ {
+ dump_integer(*i);
+ o->write_character(',');
+ }
+ dump_integer(val.m_value.binary->back());
+ }
- @return a string representation of the JSON pointer
+ o->write_characters("],\"subtype\":", 12);
+ if (val.m_value.binary->has_subtype())
+ {
+ dump_integer(val.m_value.binary->subtype());
+ o->write_character('}');
+ }
+ else
+ {
+ o->write_characters("null}", 5);
+ }
+ }
+ return;
+ }
- @liveexample{The example shows the result of `to_string`.,
- json_pointer__to_string}
+ case value_t::boolean:
+ {
+ if (val.m_value.boolean)
+ {
+ o->write_characters("true", 4);
+ }
+ else
+ {
+ o->write_characters("false", 5);
+ }
+ return;
+ }
- @since version 2.0.0
- */
- std::string to_string() const noexcept
- {
- return std::accumulate(reference_tokens.begin(), reference_tokens.end(),
- std::string{},
- [](const std::string & a, const std::string & b)
- {
- return a + "/" + escape(b);
- });
- }
+ case value_t::number_integer:
+ {
+ dump_integer(val.m_value.number_integer);
+ return;
+ }
- /// @copydoc to_string()
- operator std::string() const
- {
- return to_string();
- }
+ case value_t::number_unsigned:
+ {
+ dump_integer(val.m_value.number_unsigned);
+ return;
+ }
- /*!
- @param[in] s reference token to be converted into an array index
+ case value_t::number_float:
+ {
+ dump_float(val.m_value.number_float);
+ return;
+ }
- @return integer representation of @a s
+ case value_t::discarded:
+ {
+ o->write_characters("<discarded>", 11);
+ return;
+ }
- @throw out_of_range.404 if string @a s could not be converted to an integer
- */
- static int array_index(const std::string& s)
- {
- std::size_t processed_chars = 0;
- const int res = std::stoi(s, &processed_chars);
+ case value_t::null:
+ {
+ o->write_characters("null", 4);
+ return;
+ }
- // check if the string was completely read
- if (JSON_UNLIKELY(processed_chars != s.size()))
- {
- JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + s + "'"));
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
}
-
- return res;
}
private:
/*!
- @brief remove and return last reference pointer
- @throw out_of_range.405 if JSON pointer has no parent
+ @brief dump escaped string
+
+ Escape a string by replacing certain special characters by a sequence of an
+ escape character (backslash) and another character and other control
+ characters by a sequence of "\u" followed by a four-digit hex
+ representation. The escaped string is written to output stream @a o.
+
+ @param[in] s the string to escape
+ @param[in] ensure_ascii whether to escape non-ASCII characters with
+ \uXXXX sequences
+
+ @complexity Linear in the length of string @a s.
*/
- std::string pop_back()
+ void dump_escaped(const string_t& s, const bool ensure_ascii)
{
- if (JSON_UNLIKELY(is_root()))
+ std::uint32_t codepoint;
+ std::uint8_t state = UTF8_ACCEPT;
+ std::size_t bytes = 0; // number of bytes written to string_buffer
+
+ // number of bytes written at the point of the last valid byte
+ std::size_t bytes_after_last_accept = 0;
+ std::size_t undumped_chars = 0;
+
+ for (std::size_t i = 0; i < s.size(); ++i)
{
- JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent"));
- }
+ const auto byte = static_cast<uint8_t>(s[i]);
- auto last = reference_tokens.back();
- reference_tokens.pop_back();
- return last;
- }
+ switch (decode(state, codepoint, byte))
+ {
+ case UTF8_ACCEPT: // decode found a new code point
+ {
+ switch (codepoint)
+ {
+ case 0x08: // backspace
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = 'b';
+ break;
+ }
- /// return whether pointer points to the root document
- bool is_root() const
- {
- return reference_tokens.empty();
- }
+ case 0x09: // horizontal tab
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = 't';
+ break;
+ }
- json_pointer top() const
- {
- if (JSON_UNLIKELY(is_root()))
- {
- JSON_THROW(detail::out_of_range::create(405, "JSON pointer has no parent"));
- }
+ case 0x0A: // newline
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = 'n';
+ break;
+ }
- json_pointer result = *this;
- result.reference_tokens = {reference_tokens[0]};
- return result;
- }
+ case 0x0C: // formfeed
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = 'f';
+ break;
+ }
- /*!
- @brief create and return a reference to the pointed to value
+ case 0x0D: // carriage return
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = 'r';
+ break;
+ }
- @complexity Linear in the number of reference tokens.
+ case 0x22: // quotation mark
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = '\"';
+ break;
+ }
- @throw parse_error.109 if array index is not a number
- @throw type_error.313 if value cannot be unflattened
- */
- BasicJsonType& get_and_create(BasicJsonType& j) const
- {
- using size_type = typename BasicJsonType::size_type;
- auto result = &j;
+ case 0x5C: // reverse solidus
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = '\\';
+ break;
+ }
- // in case no reference tokens exist, return a reference to the JSON value
- // j which will be overwritten by a primitive value
- for (const auto& reference_token : reference_tokens)
- {
- switch (result->m_type)
- {
- case detail::value_t::null:
- {
- if (reference_token == "0")
- {
- // start a new array if reference token is 0
- result = &result->operator[](0);
+ default:
+ {
+ // escape control characters (0x00..0x1F) or, if
+ // ensure_ascii parameter is used, non-ASCII characters
+ if ((codepoint <= 0x1F) or (ensure_ascii and (codepoint >= 0x7F)))
+ {
+ if (codepoint <= 0xFFFF)
+ {
+ (std::snprintf)(string_buffer.data() + bytes, 7, "\\u%04x",
+ static_cast<std::uint16_t>(codepoint));
+ bytes += 6;
+ }
+ else
+ {
+ (std::snprintf)(string_buffer.data() + bytes, 13, "\\u%04x\\u%04x",
+ static_cast<std::uint16_t>(0xD7C0u + (codepoint >> 10u)),
+ static_cast<std::uint16_t>(0xDC00u + (codepoint & 0x3FFu)));
+ bytes += 12;
+ }
+ }
+ else
+ {
+ // copy byte to buffer (all previous bytes
+ // been copied have in default case above)
+ string_buffer[bytes++] = s[i];
+ }
+ break;
+ }
}
- else
+
+ // write buffer and reset index; there must be 13 bytes
+ // left, as this is the maximal number of bytes to be
+ // written ("\uxxxx\uxxxx\0") for one code point
+ if (string_buffer.size() - bytes < 13)
{
- // start a new object otherwise
- result = &result->operator[](reference_token);
+ o->write_characters(string_buffer.data(), bytes);
+ bytes = 0;
}
- break;
- }
- case detail::value_t::object:
- {
- // create an entry in the object
- result = &result->operator[](reference_token);
+ // remember the byte position of this accept
+ bytes_after_last_accept = bytes;
+ undumped_chars = 0;
break;
}
- case detail::value_t::array:
+ case UTF8_REJECT: // decode found invalid UTF-8 byte
{
- // create an entry in the array
- JSON_TRY
- {
- result = &result->operator[](static_cast<size_type>(array_index(reference_token)));
- }
- JSON_CATCH(std::invalid_argument&)
+ switch (error_handler)
{
- JSON_THROW(detail::parse_error::create(109, 0, "array index '" + reference_token + "' is not a number"));
- }
- break;
- }
-
- /*
- The following code is only reached if there exists a reference
- token _and_ the current value is primitive. In this case, we have
- an error situation, because primitive values may only occur as
- single value; that is, with an empty list of reference tokens.
- */
- default:
- JSON_THROW(detail::type_error::create(313, "invalid value to unflatten"));
- }
- }
-
- return *result;
- }
+ case error_handler_t::strict:
+ {
+ std::string sn(3, '\0');
+ (std::snprintf)(&sn[0], sn.size(), "%.2X", byte);
+ JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + sn));
+ }
- /*!
- @brief return a reference to the pointed to value
+ case error_handler_t::ignore:
+ case error_handler_t::replace:
+ {
+ // in case we saw this character the first time, we
+ // would like to read it again, because the byte
+ // may be OK for itself, but just not OK for the
+ // previous sequence
+ if (undumped_chars > 0)
+ {
+ --i;
+ }
- @note This version does not throw if a value is not present, but tries to
- create nested values instead. For instance, calling this function
- with pointer `"/this/that"` on a null value is equivalent to calling
- `operator[]("this").operator[]("that")` on that value, effectively
- changing the null value to an object.
+ // reset length buffer to the last accepted index;
+ // thus removing/ignoring the invalid characters
+ bytes = bytes_after_last_accept;
- @param[in] ptr a JSON value
+ if (error_handler == error_handler_t::replace)
+ {
+ // add a replacement character
+ if (ensure_ascii)
+ {
+ string_buffer[bytes++] = '\\';
+ string_buffer[bytes++] = 'u';
+ string_buffer[bytes++] = 'f';
+ string_buffer[bytes++] = 'f';
+ string_buffer[bytes++] = 'f';
+ string_buffer[bytes++] = 'd';
+ }
+ else
+ {
+ string_buffer[bytes++] = detail::binary_writer<BasicJsonType, char>::to_char_type('\xEF');
+ string_buffer[bytes++] = detail::binary_writer<BasicJsonType, char>::to_char_type('\xBF');
+ string_buffer[bytes++] = detail::binary_writer<BasicJsonType, char>::to_char_type('\xBD');
+ }
- @return reference to the JSON value pointed to by the JSON pointer
+ // write buffer and reset index; there must be 13 bytes
+ // left, as this is the maximal number of bytes to be
+ // written ("\uxxxx\uxxxx\0") for one code point
+ if (string_buffer.size() - bytes < 13)
+ {
+ o->write_characters(string_buffer.data(), bytes);
+ bytes = 0;
+ }
- @complexity Linear in the length of the JSON pointer.
+ bytes_after_last_accept = bytes;
+ }
- @throw parse_error.106 if an array index begins with '0'
- @throw parse_error.109 if an array index was not a number
- @throw out_of_range.404 if the JSON pointer can not be resolved
- */
- BasicJsonType& get_unchecked(BasicJsonType* ptr) const
- {
- using size_type = typename BasicJsonType::size_type;
- for (const auto& reference_token : reference_tokens)
- {
- // convert null values to arrays or objects before continuing
- if (ptr->m_type == detail::value_t::null)
- {
- // check if reference token is a number
- const bool nums =
- std::all_of(reference_token.begin(), reference_token.end(),
- [](const char x)
- {
- return (x >= '0' and x <= '9');
- });
+ undumped_chars = 0;
- // change value to array for numbers or "-" or to object otherwise
- *ptr = (nums or reference_token == "-")
- ? detail::value_t::array
- : detail::value_t::object;
- }
+ // continue processing the string
+ state = UTF8_ACCEPT;
+ break;
+ }
- switch (ptr->m_type)
- {
- case detail::value_t::object:
- {
- // use unchecked object access
- ptr = &ptr->operator[](reference_token);
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
+ }
break;
}
- case detail::value_t::array:
+ default: // decode found yet incomplete multi-byte code point
{
- // error condition (cf. RFC 6901, Sect. 4)
- if (JSON_UNLIKELY(reference_token.size() > 1 and reference_token[0] == '0'))
- {
- JSON_THROW(detail::parse_error::create(106, 0,
- "array index '" + reference_token +
- "' must not begin with '0'"));
- }
-
- if (reference_token == "-")
- {
- // explicitly treat "-" as index beyond the end
- ptr = &ptr->operator[](ptr->m_value.array->size());
- }
- else
+ if (not ensure_ascii)
{
- // convert array index to number; unchecked access
- JSON_TRY
- {
- ptr = &ptr->operator[](
- static_cast<size_type>(array_index(reference_token)));
- }
- JSON_CATCH(std::invalid_argument&)
- {
- JSON_THROW(detail::parse_error::create(109, 0, "array index '" + reference_token + "' is not a number"));
- }
+ // code point will not be escaped - copy byte to buffer
+ string_buffer[bytes++] = s[i];
}
+ ++undumped_chars;
break;
}
-
- default:
- JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
}
}
- return *ptr;
- }
-
- /*!
- @throw parse_error.106 if an array index begins with '0'
- @throw parse_error.109 if an array index was not a number
- @throw out_of_range.402 if the array index '-' is used
- @throw out_of_range.404 if the JSON pointer can not be resolved
- */
- BasicJsonType& get_checked(BasicJsonType* ptr) const
- {
- using size_type = typename BasicJsonType::size_type;
- for (const auto& reference_token : reference_tokens)
+ // we finished processing the string
+ if (JSON_HEDLEY_LIKELY(state == UTF8_ACCEPT))
{
- switch (ptr->m_type)
+ // write buffer
+ if (bytes > 0)
{
- case detail::value_t::object:
+ o->write_characters(string_buffer.data(), bytes);
+ }
+ }
+ else
+ {
+ // we finish reading, but do not accept: string was incomplete
+ switch (error_handler)
+ {
+ case error_handler_t::strict:
{
- // note: at performs range check
- ptr = &ptr->at(reference_token);
- break;
+ std::string sn(3, '\0');
+ (std::snprintf)(&sn[0], sn.size(), "%.2X", static_cast<std::uint8_t>(s.back()));
+ JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + sn));
}
- case detail::value_t::array:
+ case error_handler_t::ignore:
{
- if (JSON_UNLIKELY(reference_token == "-"))
- {
- // "-" always fails the range check
- JSON_THROW(detail::out_of_range::create(402,
- "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
- ") is out of range"));
- }
-
- // error condition (cf. RFC 6901, Sect. 4)
- if (JSON_UNLIKELY(reference_token.size() > 1 and reference_token[0] == '0'))
- {
- JSON_THROW(detail::parse_error::create(106, 0,
- "array index '" + reference_token +
- "' must not begin with '0'"));
- }
+ // write all accepted bytes
+ o->write_characters(string_buffer.data(), bytes_after_last_accept);
+ break;
+ }
- // note: at performs range check
- JSON_TRY
+ case error_handler_t::replace:
+ {
+ // write all accepted bytes
+ o->write_characters(string_buffer.data(), bytes_after_last_accept);
+ // add a replacement character
+ if (ensure_ascii)
{
- ptr = &ptr->at(static_cast<size_type>(array_index(reference_token)));
+ o->write_characters("\\ufffd", 6);
}
- JSON_CATCH(std::invalid_argument&)
+ else
{
- JSON_THROW(detail::parse_error::create(109, 0, "array index '" + reference_token + "' is not a number"));
+ o->write_characters("\xEF\xBF\xBD", 3);
}
break;
}
- default:
- JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
}
}
-
- return *ptr;
}
/*!
- @brief return a const reference to the pointed to value
-
- @param[in] ptr a JSON value
+ @brief count digits
- @return const reference to the JSON value pointed to by the JSON
- pointer
+ Count the number of decimal (base 10) digits for an input unsigned integer.
- @throw parse_error.106 if an array index begins with '0'
- @throw parse_error.109 if an array index was not a number
- @throw out_of_range.402 if the array index '-' is used
- @throw out_of_range.404 if the JSON pointer can not be resolved
+ @param[in] x unsigned integer number to count its digits
+ @return number of decimal digits
*/
- const BasicJsonType& get_unchecked(const BasicJsonType* ptr) const
+ inline unsigned int count_digits(number_unsigned_t x) noexcept
{
- using size_type = typename BasicJsonType::size_type;
- for (const auto& reference_token : reference_tokens)
+ unsigned int n_digits = 1;
+ for (;;)
{
- switch (ptr->m_type)
+ if (x < 10)
{
- case detail::value_t::object:
- {
- // use unchecked object access
- ptr = &ptr->operator[](reference_token);
- break;
- }
-
- case detail::value_t::array:
- {
- if (JSON_UNLIKELY(reference_token == "-"))
- {
- // "-" cannot be used for const access
- JSON_THROW(detail::out_of_range::create(402,
- "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
- ") is out of range"));
- }
-
- // error condition (cf. RFC 6901, Sect. 4)
- if (JSON_UNLIKELY(reference_token.size() > 1 and reference_token[0] == '0'))
- {
- JSON_THROW(detail::parse_error::create(106, 0,
- "array index '" + reference_token +
- "' must not begin with '0'"));
- }
-
- // use unchecked array access
- JSON_TRY
- {
- ptr = &ptr->operator[](
- static_cast<size_type>(array_index(reference_token)));
- }
- JSON_CATCH(std::invalid_argument&)
- {
- JSON_THROW(detail::parse_error::create(109, 0, "array index '" + reference_token + "' is not a number"));
- }
- break;
- }
-
- default:
- JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
+ return n_digits;
}
+ if (x < 100)
+ {
+ return n_digits + 1;
+ }
+ if (x < 1000)
+ {
+ return n_digits + 2;
+ }
+ if (x < 10000)
+ {
+ return n_digits + 3;
+ }
+ x = x / 10000u;
+ n_digits += 4;
}
-
- return *ptr;
}
/*!
- @throw parse_error.106 if an array index begins with '0'
- @throw parse_error.109 if an array index was not a number
- @throw out_of_range.402 if the array index '-' is used
- @throw out_of_range.404 if the JSON pointer can not be resolved
+ @brief dump an integer
+
+ Dump a given integer to output stream @a o. Works internally with
+ @a number_buffer.
+
+ @param[in] x integer number (signed or unsigned) to dump
+ @tparam NumberType either @a number_integer_t or @a number_unsigned_t
*/
- const BasicJsonType& get_checked(const BasicJsonType* ptr) const
+ template<typename NumberType, detail::enable_if_t<
+ std::is_same<NumberType, number_unsigned_t>::value or
+ std::is_same<NumberType, number_integer_t>::value or
+ std::is_same<NumberType, binary_char_t>::value,
+ int> = 0>
+ void dump_integer(NumberType x)
{
- using size_type = typename BasicJsonType::size_type;
- for (const auto& reference_token : reference_tokens)
+ static constexpr std::array<std::array<char, 2>, 100> digits_to_99
{
- switch (ptr->m_type)
{
- case detail::value_t::object:
- {
- // note: at performs range check
- ptr = &ptr->at(reference_token);
- break;
- }
-
- case detail::value_t::array:
- {
- if (JSON_UNLIKELY(reference_token == "-"))
- {
- // "-" always fails the range check
- JSON_THROW(detail::out_of_range::create(402,
- "array index '-' (" + std::to_string(ptr->m_value.array->size()) +
- ") is out of range"));
- }
-
- // error condition (cf. RFC 6901, Sect. 4)
- if (JSON_UNLIKELY(reference_token.size() > 1 and reference_token[0] == '0'))
- {
- JSON_THROW(detail::parse_error::create(106, 0,
- "array index '" + reference_token +
- "' must not begin with '0'"));
- }
-
- // note: at performs range check
- JSON_TRY
- {
- ptr = &ptr->at(static_cast<size_type>(array_index(reference_token)));
- }
- JSON_CATCH(std::invalid_argument&)
- {
- JSON_THROW(detail::parse_error::create(109, 0, "array index '" + reference_token + "' is not a number"));
- }
- break;
- }
-
- default:
- JSON_THROW(detail::out_of_range::create(404, "unresolved reference token '" + reference_token + "'"));
+ {{'0', '0'}}, {{'0', '1'}}, {{'0', '2'}}, {{'0', '3'}}, {{'0', '4'}}, {{'0', '5'}}, {{'0', '6'}}, {{'0', '7'}}, {{'0', '8'}}, {{'0', '9'}},
+ {{'1', '0'}}, {{'1', '1'}}, {{'1', '2'}}, {{'1', '3'}}, {{'1', '4'}}, {{'1', '5'}}, {{'1', '6'}}, {{'1', '7'}}, {{'1', '8'}}, {{'1', '9'}},
+ {{'2', '0'}}, {{'2', '1'}}, {{'2', '2'}}, {{'2', '3'}}, {{'2', '4'}}, {{'2', '5'}}, {{'2', '6'}}, {{'2', '7'}}, {{'2', '8'}}, {{'2', '9'}},
+ {{'3', '0'}}, {{'3', '1'}}, {{'3', '2'}}, {{'3', '3'}}, {{'3', '4'}}, {{'3', '5'}}, {{'3', '6'}}, {{'3', '7'}}, {{'3', '8'}}, {{'3', '9'}},
+ {{'4', '0'}}, {{'4', '1'}}, {{'4', '2'}}, {{'4', '3'}}, {{'4', '4'}}, {{'4', '5'}}, {{'4', '6'}}, {{'4', '7'}}, {{'4', '8'}}, {{'4', '9'}},
+ {{'5', '0'}}, {{'5', '1'}}, {{'5', '2'}}, {{'5', '3'}}, {{'5', '4'}}, {{'5', '5'}}, {{'5', '6'}}, {{'5', '7'}}, {{'5', '8'}}, {{'5', '9'}},
+ {{'6', '0'}}, {{'6', '1'}}, {{'6', '2'}}, {{'6', '3'}}, {{'6', '4'}}, {{'6', '5'}}, {{'6', '6'}}, {{'6', '7'}}, {{'6', '8'}}, {{'6', '9'}},
+ {{'7', '0'}}, {{'7', '1'}}, {{'7', '2'}}, {{'7', '3'}}, {{'7', '4'}}, {{'7', '5'}}, {{'7', '6'}}, {{'7', '7'}}, {{'7', '8'}}, {{'7', '9'}},
+ {{'8', '0'}}, {{'8', '1'}}, {{'8', '2'}}, {{'8', '3'}}, {{'8', '4'}}, {{'8', '5'}}, {{'8', '6'}}, {{'8', '7'}}, {{'8', '8'}}, {{'8', '9'}},
+ {{'9', '0'}}, {{'9', '1'}}, {{'9', '2'}}, {{'9', '3'}}, {{'9', '4'}}, {{'9', '5'}}, {{'9', '6'}}, {{'9', '7'}}, {{'9', '8'}}, {{'9', '9'}},
}
- }
+ };
- return *ptr;
- }
+ // special case for "0"
+ if (x == 0)
+ {
+ o->write_character('0');
+ return;
+ }
- /*!
- @brief split the string input to reference tokens
+ // use a pointer to fill the buffer
+ auto buffer_ptr = number_buffer.begin();
- @note This function is only called by the json_pointer constructor.
- All exceptions below are documented there.
+ const bool is_negative = std::is_same<NumberType, number_integer_t>::value and not(x >= 0); // see issue #755
+ number_unsigned_t abs_value;
- @throw parse_error.107 if the pointer is not empty or begins with '/'
- @throw parse_error.108 if character '~' is not followed by '0' or '1'
- */
- static std::vector<std::string> split(const std::string& reference_string)
- {
- std::vector<std::string> result;
+ unsigned int n_chars;
- // special case: empty reference string -> no reference tokens
- if (reference_string.empty())
+ if (is_negative)
{
- return result;
- }
+ *buffer_ptr = '-';
+ abs_value = remove_sign(static_cast<number_integer_t>(x));
- // check if nonempty reference string begins with slash
- if (JSON_UNLIKELY(reference_string[0] != '/'))
+ // account one more byte for the minus sign
+ n_chars = 1 + count_digits(abs_value);
+ }
+ else
{
- JSON_THROW(detail::parse_error::create(107, 1,
- "JSON pointer must be empty or begin with '/' - was: '" +
- reference_string + "'"));
+ abs_value = static_cast<number_unsigned_t>(x);
+ n_chars = count_digits(abs_value);
}
- // extract the reference tokens:
- // - slash: position of the last read slash (or end of string)
- // - start: position after the previous slash
- for (
- // search for the first slash after the first character
- std::size_t slash = reference_string.find_first_of('/', 1),
- // set the beginning of the first reference token
- start = 1;
- // we can stop if start == string::npos+1 = 0
- start != 0;
- // set the beginning of the next reference token
- // (will eventually be 0 if slash == std::string::npos)
- start = slash + 1,
- // find next slash
- slash = reference_string.find_first_of('/', start))
- {
- // use the text between the beginning of the reference token
- // (start) and the last slash (slash).
- auto reference_token = reference_string.substr(start, slash - start);
+ // spare 1 byte for '\0'
+ assert(n_chars < number_buffer.size() - 1);
- // check reference tokens are properly escaped
- for (std::size_t pos = reference_token.find_first_of('~');
- pos != std::string::npos;
- pos = reference_token.find_first_of('~', pos + 1))
- {
- assert(reference_token[pos] == '~');
+ // jump to the end to generate the string from backward
+ // so we later avoid reversing the result
+ buffer_ptr += n_chars;
- // ~ must be followed by 0 or 1
- if (JSON_UNLIKELY(pos == reference_token.size() - 1 or
- (reference_token[pos + 1] != '0' and
- reference_token[pos + 1] != '1')))
- {
- JSON_THROW(detail::parse_error::create(108, 0, "escape character '~' must be followed with '0' or '1'"));
- }
- }
+ // Fast int2ascii implementation inspired by "Fastware" talk by Andrei Alexandrescu
+ // See: https://www.youtube.com/watch?v=o4-CwDo2zpg
+ while (abs_value >= 100)
+ {
+ const auto digits_index = static_cast<unsigned>((abs_value % 100));
+ abs_value /= 100;
+ *(--buffer_ptr) = digits_to_99[digits_index][1];
+ *(--buffer_ptr) = digits_to_99[digits_index][0];
+ }
- // finally, store the reference token
- unescape(reference_token);
- result.push_back(reference_token);
+ if (abs_value >= 10)
+ {
+ const auto digits_index = static_cast<unsigned>(abs_value);
+ *(--buffer_ptr) = digits_to_99[digits_index][1];
+ *(--buffer_ptr) = digits_to_99[digits_index][0];
+ }
+ else
+ {
+ *(--buffer_ptr) = static_cast<char>('0' + abs_value);
}
- return result;
+ o->write_characters(number_buffer.data(), n_chars);
}
/*!
- @brief replace all occurrences of a substring by another string
-
- @param[in,out] s the string to manipulate; changed so that all
- occurrences of @a f are replaced with @a t
- @param[in] f the substring to replace with @a t
- @param[in] t the string to replace @a f
+ @brief dump a floating-point number
- @pre The search string @a f must not be empty. **This precondition is
- enforced with an assertion.**
+ Dump a given floating-point number to output stream @a o. Works internally
+ with @a number_buffer.
- @since version 2.0.0
+ @param[in] x floating-point number to dump
*/
- static void replace_substring(std::string& s, const std::string& f,
- const std::string& t)
+ void dump_float(number_float_t x)
{
- assert(not f.empty());
- for (auto pos = s.find(f); // find first occurrence of f
- pos != std::string::npos; // make sure f was found
- s.replace(pos, f.size(), t), // replace with t, and
- pos = s.find(f, pos + t.size())) // find next occurrence of f
- {}
+ // NaN / inf
+ if (not std::isfinite(x))
+ {
+ o->write_characters("null", 4);
+ return;
+ }
+
+ // If number_float_t is an IEEE-754 single or double precision number,
+ // use the Grisu2 algorithm to produce short numbers which are
+ // guaranteed to round-trip, using strtof and strtod, resp.
+ //
+ // NB: The test below works if <long double> == <double>.
+ static constexpr bool is_ieee_single_or_double
+ = (std::numeric_limits<number_float_t>::is_iec559 and std::numeric_limits<number_float_t>::digits == 24 and std::numeric_limits<number_float_t>::max_exponent == 128) or
+ (std::numeric_limits<number_float_t>::is_iec559 and std::numeric_limits<number_float_t>::digits == 53 and std::numeric_limits<number_float_t>::max_exponent == 1024);
+
+ dump_float(x, std::integral_constant<bool, is_ieee_single_or_double>());
}
- /// escape "~"" to "~0" and "/" to "~1"
- static std::string escape(std::string s)
+ void dump_float(number_float_t x, std::true_type /*is_ieee_single_or_double*/)
{
- replace_substring(s, "~", "~0");
- replace_substring(s, "/", "~1");
- return s;
+ char* begin = number_buffer.data();
+ char* end = ::nlohmann::detail::to_chars(begin, begin + number_buffer.size(), x);
+
+ o->write_characters(begin, static_cast<size_t>(end - begin));
}
- /// unescape "~1" to tilde and "~0" to slash (order is important!)
- static void unescape(std::string& s)
+ void dump_float(number_float_t x, std::false_type /*is_ieee_single_or_double*/)
{
- replace_substring(s, "~1", "/");
- replace_substring(s, "~0", "~");
- }
+ // get number of digits for a float -> text -> float round-trip
+ static constexpr auto d = std::numeric_limits<number_float_t>::max_digits10;
- /*!
- @param[in] reference_string the reference string to the current value
- @param[in] value the value to consider
- @param[in,out] result the result object to insert values to
+ // the actual conversion
+ std::ptrdiff_t len = (std::snprintf)(number_buffer.data(), number_buffer.size(), "%.*g", d, x);
- @note Empty objects or arrays are flattened to `null`.
- */
- static void flatten(const std::string& reference_string,
- const BasicJsonType& value,
- BasicJsonType& result)
- {
- switch (value.m_type)
+ // negative value indicates an error
+ assert(len > 0);
+ // check if buffer was large enough
+ assert(static_cast<std::size_t>(len) < number_buffer.size());
+
+ // erase thousands separator
+ if (thousands_sep != '\0')
{
- case detail::value_t::array:
- {
- if (value.m_value.array->empty())
- {
- // flatten empty array as null
- result[reference_string] = nullptr;
- }
- else
- {
- // iterate array and use index as reference string
- for (std::size_t i = 0; i < value.m_value.array->size(); ++i)
- {
- flatten(reference_string + "/" + std::to_string(i),
- value.m_value.array->operator[](i), result);
- }
- }
- break;
- }
+ const auto end = std::remove(number_buffer.begin(),
+ number_buffer.begin() + len, thousands_sep);
+ std::fill(end, number_buffer.end(), '\0');
+ assert((end - number_buffer.begin()) <= len);
+ len = (end - number_buffer.begin());
+ }
- case detail::value_t::object:
+ // convert decimal point to '.'
+ if (decimal_point != '\0' and decimal_point != '.')
+ {
+ const auto dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
+ if (dec_pos != number_buffer.end())
{
- if (value.m_value.object->empty())
- {
- // flatten empty object as null
- result[reference_string] = nullptr;
- }
- else
- {
- // iterate object and use keys as reference string
- for (const auto& element : *value.m_value.object)
- {
- flatten(reference_string + "/" + escape(element.first), element.second, result);
- }
- }
- break;
+ *dec_pos = '.';
}
+ }
- default:
- {
- // add primitive value with its reference string
- result[reference_string] = value;
- break;
- }
+ o->write_characters(number_buffer.data(), static_cast<std::size_t>(len));
+
+ // determine if need to append ".0"
+ const bool value_is_int_like =
+ std::none_of(number_buffer.begin(), number_buffer.begin() + len + 1,
+ [](char c)
+ {
+ return c == '.' or c == 'e';
+ });
+
+ if (value_is_int_like)
+ {
+ o->write_characters(".0", 2);
}
}
/*!
- @param[in] value flattened JSON
+ @brief check whether a string is UTF-8 encoded
- @return unflattened JSON
+ The function checks each byte of a string whether it is UTF-8 encoded. The
+ result of the check is stored in the @a state parameter. The function must
+ be called initially with state 0 (accept). State 1 means the string must
+ be rejected, because the current byte is not allowed. If the string is
+ completely processed, but the state is non-zero, the string ended
+ prematurely; that is, the last byte indicated more bytes should have
+ followed.
- @throw parse_error.109 if array index is not a number
- @throw type_error.314 if value is not an object
- @throw type_error.315 if object values are not primitive
- @throw type_error.313 if value cannot be unflattened
- */
- static BasicJsonType
- unflatten(const BasicJsonType& value)
- {
- if (JSON_UNLIKELY(not value.is_object()))
- {
- JSON_THROW(detail::type_error::create(314, "only objects can be unflattened"));
- }
+ @param[in,out] state the state of the decoding
+ @param[in,out] codep codepoint (valid only if resulting state is UTF8_ACCEPT)
+ @param[in] byte next byte to decode
+ @return new state
- BasicJsonType result;
+ @note The function has been edited: a std::array is used.
- // iterate the JSON object values
- for (const auto& element : *value.m_value.object)
+ @copyright Copyright (c) 2008-2009 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+ @sa http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
+ */
+ static std::uint8_t decode(std::uint8_t& state, std::uint32_t& codep, const std::uint8_t byte) noexcept
+ {
+ static const std::array<std::uint8_t, 400> utf8d =
{
- if (JSON_UNLIKELY(not element.second.is_primitive()))
{
- JSON_THROW(detail::type_error::create(315, "values in object must be primitive"));
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 00..1F
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20..3F
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 40..5F
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 60..7F
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, // 80..9F
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, // A0..BF
+ 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // C0..DF
+ 0xA, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x3, 0x4, 0x3, 0x3, // E0..EF
+ 0xB, 0x6, 0x6, 0x6, 0x5, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, // F0..FF
+ 0x0, 0x1, 0x2, 0x3, 0x5, 0x8, 0x7, 0x1, 0x1, 0x1, 0x4, 0x6, 0x1, 0x1, 0x1, 0x1, // s0..s0
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, // s1..s2
+ 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, // s3..s4
+ 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, // s5..s6
+ 1, 3, 1, 1, 1, 1, 1, 3, 1, 3, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // s7..s8
}
+ };
- // assign value to reference pointed to by JSON pointer; Note that if
- // the JSON pointer is "" (i.e., points to the whole value), function
- // get_and_create returns a reference to result itself. An assignment
- // will then create a primitive value.
- json_pointer(element.first).get_and_create(result) = element.second;
- }
+ const std::uint8_t type = utf8d[byte];
- return result;
+ codep = (state != UTF8_ACCEPT)
+ ? (byte & 0x3fu) | (codep << 6u)
+ : (0xFFu >> type) & (byte);
+
+ std::size_t index = 256u + static_cast<size_t>(state) * 16u + static_cast<size_t>(type);
+ assert(index < 400);
+ state = utf8d[index];
+ return state;
}
- friend bool operator==(json_pointer const& lhs,
- json_pointer const& rhs) noexcept
+ /*
+ * Overload to make the compiler happy while it is instantiating
+ * dump_integer for number_unsigned_t.
+ * Must never be called.
+ */
+ number_unsigned_t remove_sign(number_unsigned_t x)
{
- return (lhs.reference_tokens == rhs.reference_tokens);
+ assert(false); // LCOV_EXCL_LINE
+ return x; // LCOV_EXCL_LINE
}
- friend bool operator!=(json_pointer const& lhs,
- json_pointer const& rhs) noexcept
+ /*
+ * Helper function for dump_integer
+ *
+ * This function takes a negative signed integer and returns its absolute
+ * value as unsigned integer. The plus/minus shuffling is necessary as we can
+ * not directly remove the sign of an arbitrary signed integer as the
+ * absolute values of INT_MIN and INT_MAX are usually not the same. See
+ * #1708 for details.
+ */
+ inline number_unsigned_t remove_sign(number_integer_t x) noexcept
{
- return not (lhs == rhs);
+ assert(x < 0 and x < (std::numeric_limits<number_integer_t>::max)());
+ return static_cast<number_unsigned_t>(-(x + 1)) + 1;
}
- /// the reference tokens
- std::vector<std::string> reference_tokens;
-};
-}
-
-// #include <nlohmann/adl_serializer.hpp>
-
-
-#include <utility>
-
-// #include <nlohmann/detail/conversions/from_json.hpp>
-
-// #include <nlohmann/detail/conversions/to_json.hpp>
+ private:
+ /// the output of the serializer
+ output_adapter_t<char> o = nullptr;
+ /// a (hopefully) large enough character buffer
+ std::array<char, 64> number_buffer{{}};
-namespace nlohmann
-{
-template<typename, typename>
-struct adl_serializer
-{
- /*!
- @brief convert a JSON value to any value type
+ /// the locale
+ const std::lconv* loc = nullptr;
+ /// the locale's thousand separator character
+ const char thousands_sep = '\0';
+ /// the locale's decimal point character
+ const char decimal_point = '\0';
- This function is usually called by the `get()` function of the
- @ref basic_json class (either explicit or via conversion operators).
+ /// string buffer
+ std::array<char, 512> string_buffer{{}};
- @param[in] j JSON value to read from
- @param[in,out] val value to write to
- */
- template<typename BasicJsonType, typename ValueType>
- static void from_json(BasicJsonType&& j, ValueType& val) noexcept(
- noexcept(::nlohmann::from_json(std::forward<BasicJsonType>(j), val)))
- {
- ::nlohmann::from_json(std::forward<BasicJsonType>(j), val);
- }
+ /// the indentation character
+ const char indent_char;
+ /// the indentation string
+ string_t indent_string;
- /*!
- @brief convert any value type to a JSON value
+ /// error_handler how to react on decoding errors
+ const error_handler_t error_handler;
+};
+} // namespace detail
+} // namespace nlohmann
- This function is usually called by the constructors of the @ref basic_json
- class.
+// #include <nlohmann/detail/value_t.hpp>
- @param[in,out] j JSON value to write to
- @param[in] val value to read from
- */
- template<typename BasicJsonType, typename ValueType>
- static void to_json(BasicJsonType& j, ValueType&& val) noexcept(
- noexcept(::nlohmann::to_json(j, std::forward<ValueType>(val))))
- {
- ::nlohmann::to_json(j, std::forward<ValueType>(val));
- }
-};
-}
+// #include <nlohmann/json_fwd.hpp>
/*!
@@ -9704,6 +15879,9 @@ default; will be used in @ref number_integer_t)
`uint64_t` by default; will be used in @ref number_unsigned_t)
@tparam NumberFloatType type for JSON floating-point numbers (`double` by
default; will be used in @ref number_float_t)
+@tparam BinaryType type for packed binary data for compatibility with binary
+serialization formats (`std::vector<std::uint8_t>` by default; will be used in
+@ref binary_t)
@tparam AllocatorType type of the allocator to use (`std::allocator` by
default)
@tparam JSONSerializer the serializer to resolve internal calls to `to_json()`
@@ -9711,42 +15889,42 @@ and `from_json()` (@ref adl_serializer by default)
@requirement The class satisfies the following concept requirements:
- Basic
- - [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible):
+ - [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible):
JSON values can be default constructed. The result will be a JSON null
value.
- - [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible):
+ - [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible):
A JSON value can be constructed from an rvalue argument.
- - [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible):
+ - [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible):
A JSON value can be copy-constructed from an lvalue expression.
- - [MoveAssignable](http://en.cppreference.com/w/cpp/concept/MoveAssignable):
+ - [MoveAssignable](https://en.cppreference.com/w/cpp/named_req/MoveAssignable):
A JSON value van be assigned from an rvalue argument.
- - [CopyAssignable](http://en.cppreference.com/w/cpp/concept/CopyAssignable):
+ - [CopyAssignable](https://en.cppreference.com/w/cpp/named_req/CopyAssignable):
A JSON value can be copy-assigned from an lvalue expression.
- - [Destructible](http://en.cppreference.com/w/cpp/concept/Destructible):
+ - [Destructible](https://en.cppreference.com/w/cpp/named_req/Destructible):
JSON values can be destructed.
- Layout
- - [StandardLayoutType](http://en.cppreference.com/w/cpp/concept/StandardLayoutType):
+ - [StandardLayoutType](https://en.cppreference.com/w/cpp/named_req/StandardLayoutType):
JSON values have
- [standard layout](http://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
+ [standard layout](https://en.cppreference.com/w/cpp/language/data_members#Standard_layout):
All non-static data members are private and standard layout types, the
class has no virtual functions or (virtual) base classes.
- Library-wide
- - [EqualityComparable](http://en.cppreference.com/w/cpp/concept/EqualityComparable):
+ - [EqualityComparable](https://en.cppreference.com/w/cpp/named_req/EqualityComparable):
JSON values can be compared with `==`, see @ref
operator==(const_reference,const_reference).
- - [LessThanComparable](http://en.cppreference.com/w/cpp/concept/LessThanComparable):
+ - [LessThanComparable](https://en.cppreference.com/w/cpp/named_req/LessThanComparable):
JSON values can be compared with `<`, see @ref
operator<(const_reference,const_reference).
- - [Swappable](http://en.cppreference.com/w/cpp/concept/Swappable):
+ - [Swappable](https://en.cppreference.com/w/cpp/named_req/Swappable):
Any JSON lvalue or rvalue of can be swapped with any lvalue or rvalue of
other compatible types, using unqualified function call @ref swap().
- - [NullablePointer](http://en.cppreference.com/w/cpp/concept/NullablePointer):
+ - [NullablePointer](https://en.cppreference.com/w/cpp/named_req/NullablePointer):
JSON values can be compared against `std::nullptr_t` objects which are used
to model the `null` value.
- Container
- - [Container](http://en.cppreference.com/w/cpp/concept/Container):
+ - [Container](https://en.cppreference.com/w/cpp/named_req/Container):
JSON values can be used like STL containers and provide iterator access.
- - [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer);
+ - [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer);
JSON values can be used like STL containers and provide reverse iterator
access.
@@ -9758,7 +15936,7 @@ relationship:
The invariants are checked by member function assert_invariant().
@internal
-@note ObjectType trick from http://stackoverflow.com/a/9860911
+@note ObjectType trick from https://stackoverflow.com/a/9860911
@endinternal
@see [RFC 7159: The JavaScript Object Notation (JSON) Data Interchange
@@ -9774,21 +15952,36 @@ class basic_json
private:
template<detail::value_t> friend struct detail::external_constructor;
friend ::nlohmann::json_pointer<basic_json>;
- friend ::nlohmann::detail::parser<basic_json>;
+
+ template<typename BasicJsonType, typename InputType>
+ friend class ::nlohmann::detail::parser;
friend ::nlohmann::detail::serializer<basic_json>;
template<typename BasicJsonType>
friend class ::nlohmann::detail::iter_impl;
template<typename BasicJsonType, typename CharType>
friend class ::nlohmann::detail::binary_writer;
- template<typename BasicJsonType>
+ template<typename BasicJsonType, typename InputType, typename SAX>
friend class ::nlohmann::detail::binary_reader;
+ template<typename BasicJsonType>
+ friend class ::nlohmann::detail::json_sax_dom_parser;
+ template<typename BasicJsonType>
+ friend class ::nlohmann::detail::json_sax_dom_callback_parser;
/// workaround type for MSVC
using basic_json_t = NLOHMANN_BASIC_JSON_TPL;
// convenience aliases for types residing in namespace detail;
- using lexer = ::nlohmann::detail::lexer<basic_json>;
- using parser = ::nlohmann::detail::parser<basic_json>;
+ using lexer = ::nlohmann::detail::lexer_base<basic_json>;
+
+ template<typename InputAdapterType>
+ static ::nlohmann::detail::parser<basic_json, InputAdapterType> parser(
+ InputAdapterType adapter,
+ detail::parser_callback_t<basic_json>cb = nullptr,
+ bool allow_exceptions = true
+ )
+ {
+ return ::nlohmann::detail::parser<basic_json, InputAdapterType>(std::move(adapter), std::move(cb), allow_exceptions);
+ }
using primitive_iterator_t = ::nlohmann::detail::primitive_iterator_t;
template<typename BasicJsonType>
@@ -9802,20 +15995,27 @@ class basic_json
template<typename CharType>
using output_adapter_t = ::nlohmann::detail::output_adapter_t<CharType>;
- using binary_reader = ::nlohmann::detail::binary_reader<basic_json>;
+ template<typename InputType>
+ using binary_reader = ::nlohmann::detail::binary_reader<basic_json, InputType>;
template<typename CharType> using binary_writer = ::nlohmann::detail::binary_writer<basic_json, CharType>;
using serializer = ::nlohmann::detail::serializer<basic_json>;
public:
using value_t = detail::value_t;
- /// @copydoc nlohmann::json_pointer
+ /// JSON Pointer, see @ref nlohmann::json_pointer
using json_pointer = ::nlohmann::json_pointer<basic_json>;
template<typename T, typename SFINAE>
using json_serializer = JSONSerializer<T, SFINAE>;
+ /// how to treat decoding errors
+ using error_handler_t = detail::error_handler_t;
/// helper type for initializer lists of basic_json values
using initializer_list_t = std::initializer_list<detail::json_ref<basic_json>>;
+ using input_format_t = detail::input_format_t;
+ /// SAX interface type, see @ref nlohmann::json_sax
+ using json_sax_t = json_sax<basic_json>;
+
////////////////
// exceptions //
////////////////
@@ -9916,6 +16116,7 @@ class basic_json
@since 2.1.0
*/
+ JSON_HEDLEY_WARN_UNUSED_RESULT
static basic_json meta()
{
basic_json result;
@@ -10414,12 +16615,83 @@ class basic_json
*/
using number_float_t = NumberFloatType;
+ /*!
+ @brief a type for a packed binary type
+
+ This type is a type designed to carry binary data that appears in various
+ serialized formats, such as CBOR's Major Type 2, MessagePack's bin, and
+ BSON's generic binary subtype. This type is NOT a part of standard JSON and
+ exists solely for compatibility with these binary types. As such, it is
+ simply defined as an ordered sequence of zero or more byte values.
+
+ Additionally, as an implementation detail, the subtype of the binary data is
+ carried around as a `std::uint8_t`, which is compatible with both of the
+ binary data formats that use binary subtyping, (though the specific
+ numbering is incompatible with each other, and it is up to the user to
+ translate between them).
+
+ [CBOR's RFC 7049](https://tools.ietf.org/html/rfc7049) describes this type
+ as:
+ > Major type 2: a byte string. The string's length in bytes is represented
+ > following the rules for positive integers (major type 0).
+
+ [MessagePack's documentation on the bin type
+ family](https://github.com/msgpack/msgpack/blob/master/spec.md#bin-format-family)
+ describes this type as:
+ > Bin format family stores an byte array in 2, 3, or 5 bytes of extra bytes
+ > in addition to the size of the byte array.
+
+ [BSON's specifications](http://bsonspec.org/spec.html) describe several
+ binary types; however, this type is intended to represent the generic binary
+ type which has the description:
+ > Generic binary subtype - This is the most commonly used binary subtype and
+ > should be the 'default' for drivers and tools.
+
+ None of these impose any limitations on the internal representation other
+ than the basic unit of storage be some type of array whose parts are
+ decomposable into bytes.
+
+ The default representation of this binary format is a
+ `std::vector<std::uint8_t>`, which is a very common way to represent a byte
+ array in modern C++.
+
+ #### Default type
+
+ The default values for @a BinaryType is `std::vector<std::uint8_t>`
+
+ #### Storage
+
+ Binary Arrays are stored as pointers in a @ref basic_json type. That is,
+ for any access to array values, a pointer of the type `binary_t*` must be
+ dereferenced.
+
+ #### Notes on subtypes
+
+ - CBOR
+ - Binary values are represented as byte strings. No subtypes are
+ supported and will be ignored when CBOR is written.
+ - MessagePack
+ - If a subtype is given and the binary array contains exactly 1, 2, 4, 8,
+ or 16 elements, the fixext family (fixext1, fixext2, fixext4, fixext8)
+ is used. For other sizes, the ext family (ext8, ext16, ext32) is used.
+ The subtype is then added as singed 8-bit integer.
+ - If no subtype is given, the bin family (bin8, bin16, bin32) is used.
+ - BSON
+ - If a subtype is given, it is used and added as unsigned 8-bit integer.
+ - If no subtype is given, the generic binary subtype 0x00 is used.
+
+ @sa @ref binary -- create a binary array
+
+ @since version 3.8.0
+ */
+ using binary_t = nlohmann::byte_container_with_subtype<BinaryType>;
/// @}
private:
/// helper for exception-safe object creation
template<typename T, typename... Args>
+ JSON_HEDLEY_RETURNS_NON_NULL
static T* create(Args&& ... args)
{
AllocatorType<T> alloc;
@@ -10455,6 +16727,7 @@ class basic_json
number | number_integer | @ref number_integer_t
number | number_unsigned | @ref number_unsigned_t
number | number_float | @ref number_float_t
+ binary | binary | pointer to @ref binary_t
null | null | *no value is stored*
@note Variable-length types (objects, arrays, and strings) are stored as
@@ -10471,6 +16744,8 @@ class basic_json
array_t* array;
/// string (stored with pointer to save storage)
string_t* string;
+ /// binary (stored with pointer to save storage)
+ binary_t* binary;
/// boolean
boolean_t boolean;
/// number (integer)
@@ -10513,6 +16788,12 @@ class basic_json
break;
}
+ case value_t::binary:
+ {
+ binary = create<binary_t>();
+ break;
+ }
+
case value_t::boolean:
{
boolean = boolean_t(false);
@@ -10546,9 +16827,9 @@ class basic_json
default:
{
object = nullptr; // silence warning, see #821
- if (JSON_UNLIKELY(t == value_t::null))
+ if (JSON_HEDLEY_UNLIKELY(t == value_t::null))
{
- JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.1.2")); // LCOV_EXCL_LINE
+ JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.8.0")); // LCOV_EXCL_LINE
}
break;
}
@@ -10591,8 +16872,79 @@ class basic_json
array = create<array_t>(std::move(value));
}
+ /// constructor for binary arrays
+ json_value(const typename binary_t::container_type& value)
+ {
+ binary = create<binary_t>(value);
+ }
+
+ /// constructor for rvalue binary arrays
+ json_value(typename binary_t::container_type&& value)
+ {
+ binary = create<binary_t>(std::move(value));
+ }
+
+ /// constructor for binary arrays (internal type)
+ json_value(const binary_t& value)
+ {
+ binary = create<binary_t>(value);
+ }
+
+ /// constructor for rvalue binary arrays (internal type)
+ json_value(binary_t&& value)
+ {
+ binary = create<binary_t>(std::move(value));
+ }
+
void destroy(value_t t) noexcept
{
+ // flatten the current json_value to a heap-allocated stack
+ std::vector<basic_json> stack;
+
+ // move the top-level items to stack
+ if (t == value_t::array)
+ {
+ stack.reserve(array->size());
+ std::move(array->begin(), array->end(), std::back_inserter(stack));
+ }
+ else if (t == value_t::object)
+ {
+ stack.reserve(object->size());
+ for (auto&& it : *object)
+ {
+ stack.push_back(std::move(it.second));
+ }
+ }
+
+ while (not stack.empty())
+ {
+ // move the last item to local variable to be processed
+ basic_json current_item(std::move(stack.back()));
+ stack.pop_back();
+
+ // if current_item is array/object, move
+ // its children to the stack to be processed later
+ if (current_item.is_array())
+ {
+ std::move(current_item.m_value.array->begin(), current_item.m_value.array->end(),
+ std::back_inserter(stack));
+
+ current_item.m_value.array->clear();
+ }
+ else if (current_item.is_object())
+ {
+ for (auto&& it : *current_item.m_value.object)
+ {
+ stack.push_back(std::move(it.second));
+ }
+
+ current_item.m_value.object->clear();
+ }
+
+ // it's now safe that current_item get destructed
+ // since it doesn't have any children
+ }
+
switch (t)
{
case value_t::object:
@@ -10619,6 +16971,14 @@ class basic_json
break;
}
+ case value_t::binary:
+ {
+ AllocatorType<binary_t> alloc;
+ std::allocator_traits<decltype(alloc)>::destroy(alloc, binary);
+ std::allocator_traits<decltype(alloc)>::deallocate(alloc, binary, 1);
+ break;
+ }
+
default:
{
break;
@@ -10641,6 +17001,7 @@ class basic_json
assert(m_type != value_t::object or m_value.object != nullptr);
assert(m_type != value_t::array or m_value.array != nullptr);
assert(m_type != value_t::string or m_value.string != nullptr);
+ assert(m_type != value_t::binary or m_value.binary != nullptr);
}
public:
@@ -10663,7 +17024,7 @@ class basic_json
@sa @ref parser_callback_t for more information and examples
*/
- using parse_event_t = typename parser::parse_event_t;
+ using parse_event_t = detail::parse_event_t;
/*!
@brief per-element parser callback type
@@ -10714,8 +17075,7 @@ class basic_json
@since version 1.0.0
*/
- using parser_callback_t = typename parser::parser_callback_t;
-
+ using parser_callback_t = detail::parser_callback_t<basic_json>;
//////////////////
// constructors //
@@ -10740,6 +17100,7 @@ class basic_json
number | `0`
object | `{}`
array | `[]`
+ binary | empty array
@param[in] v the type of the value to create
@@ -10811,6 +17172,12 @@ class basic_json
@ref number_float_t, and all convertible number types such as `int`,
`size_t`, `int64_t`, `float` or `double` can be used.
- **boolean**: @ref boolean_t / `bool` can be used.
+ - **binary**: @ref binary_t / `std::vector<uint8_t>` may be used,
+ unfortunately because string literals cannot be distinguished from binary
+ character arrays by the C++ type system, all types compatible with `const
+ char*` will be directed to the string constructor instead. This is both
+ for backwards compatibility, and due to the fact that a binary type is not
+ a standard JSON type.
See the examples below.
@@ -10845,7 +17212,7 @@ class basic_json
template <typename CompatibleType,
typename U = detail::uncvref_t<CompatibleType>,
detail::enable_if_t<
- detail::is_compatible_type<basic_json_t, U>::value, int> = 0>
+ not detail::is_basic_json<U>::value and detail::is_compatible_type<basic_json_t, U>::value, int> = 0>
basic_json(CompatibleType && val) noexcept(noexcept(
JSONSerializer<U>::to_json(std::declval<basic_json_t&>(),
std::forward<CompatibleType>(val))))
@@ -10878,7 +17245,7 @@ class basic_json
was provided), strong guarantee holds: if an exception is thrown, there are
no changes to any JSON value.
- @since version 3.1.2
+ @since version 3.2.0
*/
template <typename BasicJsonType,
detail::enable_if_t<
@@ -10892,6 +17259,7 @@ class basic_json
using other_string_t = typename BasicJsonType::string_t;
using other_object_t = typename BasicJsonType::object_t;
using other_array_t = typename BasicJsonType::array_t;
+ using other_binary_t = typename BasicJsonType::binary_t;
switch (val.type())
{
@@ -10916,12 +17284,17 @@ class basic_json
case value_t::array:
JSONSerializer<other_array_t>::to_json(*this, val.template get_ref<const other_array_t&>());
break;
+ case value_t::binary:
+ JSONSerializer<other_binary_t>::to_json(*this, val.template get_ref<const other_binary_t&>());
+ break;
case value_t::null:
*this = nullptr;
break;
case value_t::discarded:
m_type = value_t::discarded;
break;
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
}
assert_invariant();
}
@@ -11009,7 +17382,7 @@ class basic_json
bool is_an_object = std::all_of(init.begin(), init.end(),
[](const detail::json_ref<basic_json>& element_ref)
{
- return (element_ref->is_array() and element_ref->size() == 2 and (*element_ref)[0].is_string());
+ return element_ref->is_array() and element_ref->size() == 2 and (*element_ref)[0].is_string();
});
// adjust type if type deduction is not wanted
@@ -11022,7 +17395,7 @@ class basic_json
}
// if object is wanted but impossible, throw an exception
- if (JSON_UNLIKELY(manual_type == value_t::object and not is_an_object))
+ if (JSON_HEDLEY_UNLIKELY(manual_type == value_t::object and not is_an_object))
{
JSON_THROW(type_error::create(301, "cannot create object from initializer list"));
}
@@ -11052,6 +17425,99 @@ class basic_json
assert_invariant();
}
+ /*!
+ @brief explicitly create a binary array (without subtype)
+
+ Creates a JSON binary array value from a given binary container. Binary
+ values are part of various binary formats, such as CBOR, MessagePack, and
+ BSON. This constructor is used to create a value for serialization to those
+ formats.
+
+ @note Note, this function exists because of the difficulty in correctly
+ specifying the correct template overload in the standard value ctor, as both
+ JSON arrays and JSON binary arrays are backed with some form of a
+ `std::vector`. Because JSON binary arrays are a non-standard extension it
+ was decided that it would be best to prevent automatic initialization of a
+ binary array type, for backwards compatibility and so it does not happen on
+ accident.
+
+ @param[in] init container containing bytes to use as binary type
+
+ @return JSON binary array value
+
+ @complexity Linear in the size of @a init.
+
+ @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+ changes to any JSON value.
+
+ @since version 3.8.0
+ */
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json binary(const typename binary_t::container_type& init)
+ {
+ auto res = basic_json();
+ res.m_type = value_t::binary;
+ res.m_value = init;
+ return res;
+ }
+
+ /*!
+ @brief explicitly create a binary array (with subtype)
+
+ Creates a JSON binary array value from a given binary container. Binary
+ values are part of various binary formats, such as CBOR, MessagePack, and
+ BSON. This constructor is used to create a value for serialization to those
+ formats.
+
+ @note Note, this function exists because of the difficulty in correctly
+ specifying the correct template overload in the standard value ctor, as both
+ JSON arrays and JSON binary arrays are backed with some form of a
+ `std::vector`. Because JSON binary arrays are a non-standard extension it
+ was decided that it would be best to prevent automatic initialization of a
+ binary array type, for backwards compatibility and so it does not happen on
+ accident.
+
+ @param[in] init container containing bytes to use as binary type
+ @param[in] subtype subtype to use in MessagePack and BSON
+
+ @return JSON binary array value
+
+ @complexity Linear in the size of @a init.
+
+ @exceptionsafety Strong guarantee: if an exception is thrown, there are no
+ changes to any JSON value.
+
+ @since version 3.8.0
+ */
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json binary(const typename binary_t::container_type& init, std::uint8_t subtype)
+ {
+ auto res = basic_json();
+ res.m_type = value_t::binary;
+ res.m_value = binary_t(init, subtype);
+ return res;
+ }
+
+ /// @copydoc binary(const typename binary_t::container_type&)
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json binary(typename binary_t::container_type&& init)
+ {
+ auto res = basic_json();
+ res.m_type = value_t::binary;
+ res.m_value = std::move(init);
+ return res;
+ }
+
+ /// @copydoc binary(const typename binary_t::container_type&, std::uint8_t)
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json binary(typename binary_t::container_type&& init, std::uint8_t subtype)
+ {
+ auto res = basic_json();
+ res.m_type = value_t::binary;
+ res.m_value = binary_t(std::move(init), subtype);
+ return res;
+ }
+
/*!
@brief explicitly create an array from an initializer list
@@ -11089,6 +17555,7 @@ class basic_json
@since version 1.0.0
*/
+ JSON_HEDLEY_WARN_UNUSED_RESULT
static basic_json array(initializer_list_t init = {})
{
return basic_json(init, false, value_t::array);
@@ -11132,6 +17599,7 @@ class basic_json
@since version 1.0.0
*/
+ JSON_HEDLEY_WARN_UNUSED_RESULT
static basic_json object(initializer_list_t init = {})
{
return basic_json(init, false, value_t::object);
@@ -11198,7 +17666,7 @@ class basic_json
@warning A precondition is enforced with a runtime assertion that will
result in calling `std::abort` if this precondition is not met.
Assertions can be disabled by defining `NDEBUG` at compile time.
- See http://en.cppreference.com/w/cpp/error/assert for more
+ See https://en.cppreference.com/w/cpp/error/assert for more
information.
@throw invalid_iterator.201 if iterators @a first and @a last are not
@@ -11230,7 +17698,7 @@ class basic_json
assert(last.m_object != nullptr);
// make sure iterator fits the current value
- if (JSON_UNLIKELY(first.m_object != last.m_object))
+ if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
{
JSON_THROW(invalid_iterator::create(201, "iterators are not compatible"));
}
@@ -11247,8 +17715,8 @@ class basic_json
case value_t::number_unsigned:
case value_t::string:
{
- if (JSON_UNLIKELY(not first.m_it.primitive_iterator.is_begin()
- or not last.m_it.primitive_iterator.is_end()))
+ if (JSON_HEDLEY_UNLIKELY(not first.m_it.primitive_iterator.is_begin()
+ or not last.m_it.primitive_iterator.is_end()))
{
JSON_THROW(invalid_iterator::create(204, "iterators out of range"));
}
@@ -11305,6 +17773,12 @@ class basic_json
break;
}
+ case value_t::binary:
+ {
+ m_value = *first.m_object->m_value.binary;
+ break;
+ }
+
default:
JSON_THROW(invalid_iterator::create(206, "cannot construct with iterators from " +
std::string(first.m_object->type_name())));
@@ -11318,10 +17792,10 @@ class basic_json
// other constructors and destructor //
///////////////////////////////////////
- /// @private
- basic_json(const detail::json_ref<basic_json>& ref)
- : basic_json(ref.moved_or_copied())
- {}
+ template <typename JsonRef,
+ detail::enable_if_t<detail::conjunction<detail::is_json_ref<JsonRef>,
+ std::is_same<typename JsonRef::value_type, basic_json>>::value, int> = 0 >
+ basic_json(const JsonRef& ref) : basic_json(ref.moved_or_copied()) {}
/*!
@brief copy constructor
@@ -11338,7 +17812,7 @@ class basic_json
changes to any JSON value.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is linear.
- As postcondition, it holds: `other == basic_json(other)`.
@@ -11398,6 +17872,12 @@ class basic_json
break;
}
+ case value_t::binary:
+ {
+ m_value = *other.m_value.binary;
+ break;
+ }
+
default:
break;
}
@@ -11423,7 +17903,7 @@ class basic_json
exceptions.
@requirement This function helps `basic_json` satisfying the
- [MoveConstructible](http://en.cppreference.com/w/cpp/concept/MoveConstructible)
+ [MoveConstructible](https://en.cppreference.com/w/cpp/named_req/MoveConstructible)
requirements.
@liveexample{The code below shows the move constructor explicitly called
@@ -11457,7 +17937,7 @@ class basic_json
@complexity Linear.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is linear.
@@ -11468,7 +17948,7 @@ class basic_json
@since version 1.0.0
*/
- reference& operator=(basic_json other) noexcept (
+ basic_json& operator=(basic_json other) noexcept (
std::is_nothrow_move_constructible<value_t>::value and
std::is_nothrow_move_assignable<value_t>::value and
std::is_nothrow_move_constructible<json_value>::value and
@@ -11494,7 +17974,7 @@ class basic_json
@complexity Linear.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is linear.
- All stored elements are destroyed and all memory is freed.
@@ -11534,11 +18014,19 @@ class basic_json
@param[in] ensure_ascii If @a ensure_ascii is true, all non-ASCII characters
in the output are escaped with `\uXXXX` sequences, and the result consists
of ASCII characters only.
+ @param[in] error_handler how to react on decoding errors; there are three
+ possible values: `strict` (throws and exception in case a decoding error
+ occurs; default), `replace` (replace invalid UTF-8 sequences with U+FFFD),
+ and `ignore` (ignore invalid UTF-8 sequences during serialization).
@return string containing the serialization of the JSON value
@throw type_error.316 if a string stored inside the JSON value is not
- UTF-8 encoded
+ UTF-8 encoded and @a error_handler is set to strict
+
+ @note Binary values are serialized as object containing two keys:
+ - "bytes": an array of bytes as integers
+ - "subtype": the subtype as integer or "null" if the binary has no subtype
@complexity Linear.
@@ -11552,13 +18040,17 @@ class basic_json
@see https://docs.python.org/2/library/json.html#json.dump
@since version 1.0.0; indentation character @a indent_char, option
- @a ensure_ascii and exceptions added in version 3.0.0
+ @a ensure_ascii and exceptions added in version 3.0.0; error
+ handlers added in version 3.4.0; serialization of binary values added
+ in version 3.8.0.
*/
- string_t dump(const int indent = -1, const char indent_char = ' ',
- const bool ensure_ascii = false) const
+ string_t dump(const int indent = -1,
+ const char indent_char = ' ',
+ const bool ensure_ascii = false,
+ const error_handler_t error_handler = error_handler_t::strict) const
{
string_t result;
- serializer s(detail::output_adapter<char, string_t>(result), indent_char);
+ serializer s(detail::output_adapter<char, string_t>(result), indent_char, error_handler);
if (indent >= 0)
{
@@ -11589,6 +18081,7 @@ class basic_json
number (floating-point) | value_t::number_float
object | value_t::object
array | value_t::array
+ binary | value_t::binary
discarded | value_t::discarded
@complexity Constant.
@@ -11631,12 +18124,13 @@ class basic_json
@sa @ref is_string() -- returns whether JSON value is a string
@sa @ref is_boolean() -- returns whether JSON value is a boolean
@sa @ref is_number() -- returns whether JSON value is a number
+ @sa @ref is_binary() -- returns whether JSON value is a binary array
@since version 1.0.0
*/
constexpr bool is_primitive() const noexcept
{
- return is_null() or is_string() or is_boolean() or is_number();
+ return is_null() or is_string() or is_boolean() or is_number() or is_binary();
}
/*!
@@ -11685,7 +18179,7 @@ class basic_json
*/
constexpr bool is_null() const noexcept
{
- return (m_type == value_t::null);
+ return m_type == value_t::null;
}
/*!
@@ -11707,7 +18201,7 @@ class basic_json
*/
constexpr bool is_boolean() const noexcept
{
- return (m_type == value_t::boolean);
+ return m_type == value_t::boolean;
}
/*!
@@ -11766,7 +18260,7 @@ class basic_json
*/
constexpr bool is_number_integer() const noexcept
{
- return (m_type == value_t::number_integer or m_type == value_t::number_unsigned);
+ return m_type == value_t::number_integer or m_type == value_t::number_unsigned;
}
/*!
@@ -11794,7 +18288,7 @@ class basic_json
*/
constexpr bool is_number_unsigned() const noexcept
{
- return (m_type == value_t::number_unsigned);
+ return m_type == value_t::number_unsigned;
}
/*!
@@ -11822,7 +18316,7 @@ class basic_json
*/
constexpr bool is_number_float() const noexcept
{
- return (m_type == value_t::number_float);
+ return m_type == value_t::number_float;
}
/*!
@@ -11844,7 +18338,7 @@ class basic_json
*/
constexpr bool is_object() const noexcept
{
- return (m_type == value_t::object);
+ return m_type == value_t::object;
}
/*!
@@ -11866,7 +18360,7 @@ class basic_json
*/
constexpr bool is_array() const noexcept
{
- return (m_type == value_t::array);
+ return m_type == value_t::array;
}
/*!
@@ -11888,7 +18382,29 @@ class basic_json
*/
constexpr bool is_string() const noexcept
{
- return (m_type == value_t::string);
+ return m_type == value_t::string;
+ }
+
+ /*!
+ @brief return whether value is a binary array
+
+ This function returns true if and only if the JSON value is a binary array.
+
+ @return `true` if type is binary array, `false` otherwise.
+
+ @complexity Constant.
+
+ @exceptionsafety No-throw guarantee: this member function never throws
+ exceptions.
+
+ @liveexample{The following code exemplifies `is_binary()` for all JSON
+ types.,is_binary}
+
+ @since version 3.8.0
+ */
+ constexpr bool is_binary() const noexcept
+ {
+ return m_type == value_t::binary;
}
/*!
@@ -11915,7 +18431,7 @@ class basic_json
*/
constexpr bool is_discarded() const noexcept
{
- return (m_type == value_t::discarded);
+ return m_type == value_t::discarded;
}
/*!
@@ -11954,7 +18470,7 @@ class basic_json
/// get a boolean (explicit)
boolean_t get_impl(boolean_t* /*unused*/) const
{
- if (JSON_LIKELY(is_boolean()))
+ if (JSON_HEDLEY_LIKELY(is_boolean()))
{
return m_value.boolean;
}
@@ -12046,6 +18562,18 @@ class basic_json
return is_number_float() ? &m_value.number_float : nullptr;
}
+ /// get a pointer to the value (binary)
+ binary_t* get_impl_ptr(binary_t* /*unused*/) noexcept
+ {
+ return is_binary() ? m_value.binary : nullptr;
+ }
+
+ /// get a pointer to the value (binary)
+ constexpr const binary_t* get_impl_ptr(const binary_t* /*unused*/) const noexcept
+ {
+ return is_binary() ? m_value.binary : nullptr;
+ }
+
/*!
@brief helper function to implement get_ref()
@@ -12063,7 +18591,7 @@ class basic_json
// delegate the call to get_ptr<>()
auto ptr = obj.template get_ptr<typename std::add_pointer<ReferenceType>::type>();
- if (JSON_LIKELY(ptr != nullptr))
+ if (JSON_HEDLEY_LIKELY(ptr != nullptr))
{
return *ptr;
}
@@ -12111,7 +18639,7 @@ class basic_json
@complexity Depending on the implementation of the called `from_json()`
method.
- @since version 3.1.2
+ @since version 3.2.0
*/
template<typename BasicJsonType, detail::enable_if_t<
not std::is_same<BasicJsonType, basic_json>::value and
@@ -12125,8 +18653,8 @@ class basic_json
@brief get a value (explicit)
Explicit type conversion between the JSON value and a compatible value
- which is [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible)
- and [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible).
+ which is [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+ and [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
The value is converted by calling the @ref json_serializer<ValueType>
`from_json()` method.
@@ -12186,8 +18714,8 @@ class basic_json
@brief get a value (explicit); special case
Explicit type conversion between the JSON value and a compatible value
- which is **not** [CopyConstructible](http://en.cppreference.com/w/cpp/concept/CopyConstructible)
- and **not** [DefaultConstructible](http://en.cppreference.com/w/cpp/concept/DefaultConstructible).
+ which is **not** [CopyConstructible](https://en.cppreference.com/w/cpp/named_req/CopyConstructible)
+ and **not** [DefaultConstructible](https://en.cppreference.com/w/cpp/named_req/DefaultConstructible).
The value is converted by calling the @ref json_serializer<ValueType>
`from_json()` method.
@@ -12211,32 +18739,92 @@ class basic_json
@throw what @ref json_serializer<ValueType> `from_json()` method throws
- @since version 2.1.0
- */
- template<typename ValueTypeCV, typename ValueType = detail::uncvref_t<ValueTypeCV>,
- detail::enable_if_t<not std::is_same<basic_json_t, ValueType>::value and
- detail::has_non_default_from_json<basic_json_t, ValueType>::value,
- int> = 0>
- ValueType get() const noexcept(noexcept(
- JSONSerializer<ValueTypeCV>::from_json(std::declval<const basic_json_t&>())))
+ @since version 2.1.0
+ */
+ template<typename ValueTypeCV, typename ValueType = detail::uncvref_t<ValueTypeCV>,
+ detail::enable_if_t<not std::is_same<basic_json_t, ValueType>::value and
+ detail::has_non_default_from_json<basic_json_t, ValueType>::value,
+ int> = 0>
+ ValueType get() const noexcept(noexcept(
+ JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>())))
+ {
+ static_assert(not std::is_reference<ValueTypeCV>::value,
+ "get() cannot be used with reference types, you might want to use get_ref()");
+ return JSONSerializer<ValueType>::from_json(*this);
+ }
+
+ /*!
+ @brief get a value (explicit)
+
+ Explicit type conversion between the JSON value and a compatible value.
+ The value is filled into the input parameter by calling the @ref json_serializer<ValueType>
+ `from_json()` method.
+
+ The function is equivalent to executing
+ @code {.cpp}
+ ValueType v;
+ JSONSerializer<ValueType>::from_json(*this, v);
+ @endcode
+
+ This overloads is chosen if:
+ - @a ValueType is not @ref basic_json,
+ - @ref json_serializer<ValueType> has a `from_json()` method of the form
+ `void from_json(const basic_json&, ValueType&)`, and
+
+ @tparam ValueType the input parameter type.
+
+ @return the input parameter, allowing chaining calls.
+
+ @throw what @ref json_serializer<ValueType> `from_json()` method throws
+
+ @liveexample{The example below shows several conversions from JSON values
+ to other types. There a few things to note: (1) Floating-point numbers can
+ be converted to integers\, (2) A JSON array can be converted to a standard
+ `std::vector<short>`\, (3) A JSON object can be converted to C++
+ associative containers such as `std::unordered_map<std::string\,
+ json>`.,get_to}
+
+ @since version 3.3.0
+ */
+ template<typename ValueType,
+ detail::enable_if_t <
+ not detail::is_basic_json<ValueType>::value and
+ detail::has_from_json<basic_json_t, ValueType>::value,
+ int> = 0>
+ ValueType & get_to(ValueType& v) const noexcept(noexcept(
+ JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>(), v)))
+ {
+ JSONSerializer<ValueType>::from_json(*this, v);
+ return v;
+ }
+
+ template <
+ typename T, std::size_t N,
+ typename Array = T (&)[N],
+ detail::enable_if_t <
+ detail::has_from_json<basic_json_t, Array>::value, int > = 0 >
+ Array get_to(T (&v)[N]) const
+ noexcept(noexcept(JSONSerializer<Array>::from_json(
+ std::declval<const basic_json_t&>(), v)))
{
- static_assert(not std::is_reference<ValueTypeCV>::value,
- "get() cannot be used with reference types, you might want to use get_ref()");
- return JSONSerializer<ValueTypeCV>::from_json(*this);
+ JSONSerializer<Array>::from_json(*this, v);
+ return v;
}
+
/*!
- @brief get a pointer value (explicit)
+ @brief get a pointer value (implicit)
- Explicit pointer access to the internally stored JSON value. No copies are
+ Implicit pointer access to the internally stored JSON value. No copies are
made.
- @warning The pointer becomes invalid if the underlying JSON object
- changes.
+ @warning Writing data to the pointee of the result yields an undefined
+ state.
@tparam PointerType pointer type; must be a pointer to @ref array_t, @ref
object_t, @ref string_t, @ref boolean_t, @ref number_integer_t,
- @ref number_unsigned_t, or @ref number_float_t.
+ @ref number_unsigned_t, or @ref number_float_t. Enforced by a static
+ assertion.
@return pointer to the internally stored JSON value if the requested
pointer type @a PointerType fits to the JSON value; `nullptr` otherwise
@@ -12246,45 +18834,43 @@ class basic_json
@liveexample{The example below shows how pointers to internal values of a
JSON value can be requested. Note that no type conversions are made and a
`nullptr` is returned if the value and the requested pointer type does not
- match.,get__PointerType}
-
- @sa @ref get_ptr() for explicit pointer-member access
+ match.,get_ptr}
@since version 1.0.0
*/
template<typename PointerType, typename std::enable_if<
std::is_pointer<PointerType>::value, int>::type = 0>
- PointerType get() noexcept
+ auto get_ptr() noexcept -> decltype(std::declval<basic_json_t&>().get_impl_ptr(std::declval<PointerType>()))
{
- // delegate the call to get_ptr
- return get_ptr<PointerType>();
+ // delegate the call to get_impl_ptr<>()
+ return get_impl_ptr(static_cast<PointerType>(nullptr));
}
/*!
- @brief get a pointer value (explicit)
- @copydoc get()
+ @brief get a pointer value (implicit)
+ @copydoc get_ptr()
*/
template<typename PointerType, typename std::enable_if<
- std::is_pointer<PointerType>::value, int>::type = 0>
- constexpr const PointerType get() const noexcept
+ std::is_pointer<PointerType>::value and
+ std::is_const<typename std::remove_pointer<PointerType>::type>::value, int>::type = 0>
+ constexpr auto get_ptr() const noexcept -> decltype(std::declval<const basic_json_t&>().get_impl_ptr(std::declval<PointerType>()))
{
- // delegate the call to get_ptr
- return get_ptr<PointerType>();
+ // delegate the call to get_impl_ptr<>() const
+ return get_impl_ptr(static_cast<PointerType>(nullptr));
}
/*!
- @brief get a pointer value (implicit)
+ @brief get a pointer value (explicit)
- Implicit pointer access to the internally stored JSON value. No copies are
+ Explicit pointer access to the internally stored JSON value. No copies are
made.
- @warning Writing data to the pointee of the result yields an undefined
- state.
+ @warning The pointer becomes invalid if the underlying JSON object
+ changes.
@tparam PointerType pointer type; must be a pointer to @ref array_t, @ref
object_t, @ref string_t, @ref boolean_t, @ref number_integer_t,
- @ref number_unsigned_t, or @ref number_float_t. Enforced by a static
- assertion.
+ @ref number_unsigned_t, or @ref number_float_t.
@return pointer to the internally stored JSON value if the requested
pointer type @a PointerType fits to the JSON value; `nullptr` otherwise
@@ -12294,59 +18880,30 @@ class basic_json
@liveexample{The example below shows how pointers to internal values of a
JSON value can be requested. Note that no type conversions are made and a
`nullptr` is returned if the value and the requested pointer type does not
- match.,get_ptr}
+ match.,get__PointerType}
+
+ @sa @ref get_ptr() for explicit pointer-member access
@since version 1.0.0
*/
template<typename PointerType, typename std::enable_if<
std::is_pointer<PointerType>::value, int>::type = 0>
- PointerType get_ptr() noexcept
- {
- // get the type of the PointerType (remove pointer and const)
- using pointee_t = typename std::remove_const<typename
- std::remove_pointer<typename
- std::remove_const<PointerType>::type>::type>::type;
- // make sure the type matches the allowed types
- static_assert(
- std::is_same<object_t, pointee_t>::value
- or std::is_same<array_t, pointee_t>::value
- or std::is_same<string_t, pointee_t>::value
- or std::is_same<boolean_t, pointee_t>::value
- or std::is_same<number_integer_t, pointee_t>::value
- or std::is_same<number_unsigned_t, pointee_t>::value
- or std::is_same<number_float_t, pointee_t>::value
- , "incompatible pointer type");
-
- // delegate the call to get_impl_ptr<>()
- return get_impl_ptr(static_cast<PointerType>(nullptr));
+ auto get() noexcept -> decltype(std::declval<basic_json_t&>().template get_ptr<PointerType>())
+ {
+ // delegate the call to get_ptr
+ return get_ptr<PointerType>();
}
/*!
- @brief get a pointer value (implicit)
- @copydoc get_ptr()
+ @brief get a pointer value (explicit)
+ @copydoc get()
*/
template<typename PointerType, typename std::enable_if<
- std::is_pointer<PointerType>::value and
- std::is_const<typename std::remove_pointer<PointerType>::type>::value, int>::type = 0>
- constexpr const PointerType get_ptr() const noexcept
- {
- // get the type of the PointerType (remove pointer and const)
- using pointee_t = typename std::remove_const<typename
- std::remove_pointer<typename
- std::remove_const<PointerType>::type>::type>::type;
- // make sure the type matches the allowed types
- static_assert(
- std::is_same<object_t, pointee_t>::value
- or std::is_same<array_t, pointee_t>::value
- or std::is_same<string_t, pointee_t>::value
- or std::is_same<boolean_t, pointee_t>::value
- or std::is_same<number_integer_t, pointee_t>::value
- or std::is_same<number_unsigned_t, pointee_t>::value
- or std::is_same<number_float_t, pointee_t>::value
- , "incompatible pointer type");
-
- // delegate the call to get_impl_ptr<>() const
- return get_impl_ptr(static_cast<PointerType>(nullptr));
+ std::is_pointer<PointerType>::value, int>::type = 0>
+ constexpr auto get() const noexcept -> decltype(std::declval<const basic_json_t&>().template get_ptr<PointerType>())
+ {
+ // delegate the call to get_ptr
+ return get_ptr<PointerType>();
}
/*!
@@ -12430,12 +18987,11 @@ class basic_json
not std::is_same<ValueType, detail::json_ref<basic_json>>::value and
not std::is_same<ValueType, typename string_t::value_type>::value and
not detail::is_basic_json<ValueType>::value
-#ifndef _MSC_VER // fix for issue #167 operator<< ambiguity under VS2015
and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
-#endif
-#if defined(JSON_HAS_CPP_17)
+#if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) and _MSC_VER >= 1910 and _MSC_VER <= 1914))
and not std::is_same<ValueType, typename std::string_view>::value
#endif
+ and detail::is_detected<detail::get_template_function, const basic_json_t&, ValueType>::value
, int >::type = 0 >
operator ValueType() const
{
@@ -12443,6 +18999,36 @@ class basic_json
return get<ValueType>();
}
+ /*!
+ @return reference to the binary value
+
+ @throw type_error.302 if the value is not binary
+
+ @sa @ref is_binary() to check if the value is binary
+
+ @since version 3.8.0
+ */
+ binary_t& get_binary()
+ {
+ if (not is_binary())
+ {
+ JSON_THROW(type_error::create(302, "type must be binary, but is " + std::string(type_name())));
+ }
+
+ return *get_ptr<binary_t*>();
+ }
+
+ /// @copydoc get_binary()
+ const binary_t& get_binary() const
+ {
+ if (not is_binary())
+ {
+ JSON_THROW(type_error::create(302, "type must be binary, but is " + std::string(type_name())));
+ }
+
+ return *get_ptr<const binary_t*>();
+ }
+
/// @}
@@ -12483,7 +19069,7 @@ class basic_json
reference at(size_type idx)
{
// at only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
JSON_TRY
{
@@ -12530,7 +19116,7 @@ class basic_json
const_reference at(size_type idx) const
{
// at only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
JSON_TRY
{
@@ -12581,7 +19167,7 @@ class basic_json
reference at(const typename object_t::key_type& key)
{
// at only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
JSON_TRY
{
@@ -12632,7 +19218,7 @@ class basic_json
const_reference at(const typename object_t::key_type& key) const
{
// at only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
JSON_TRY
{
@@ -12686,7 +19272,7 @@ class basic_json
}
// operator[] only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
// fill up array with null values if given idx is outside range
if (idx >= m_value.array->size())
@@ -12699,7 +19285,7 @@ class basic_json
return m_value.array->operator[](idx);
}
- JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+ JSON_THROW(type_error::create(305, "cannot use operator[] with a numeric argument with " + std::string(type_name())));
}
/*!
@@ -12724,12 +19310,12 @@ class basic_json
const_reference operator[](size_type idx) const
{
// const operator[] only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
return m_value.array->operator[](idx);
}
- JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+ JSON_THROW(type_error::create(305, "cannot use operator[] with a numeric argument with " + std::string(type_name())));
}
/*!
@@ -12770,12 +19356,12 @@ class basic_json
}
// operator[] only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
return m_value.object->operator[](key);
}
- JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+ JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
}
/*!
@@ -12811,13 +19397,13 @@ class basic_json
const_reference operator[](const typename object_t::key_type& key) const
{
// const operator[] only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
assert(m_value.object->find(key) != m_value.object->end());
return m_value.object->find(key)->second;
}
- JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+ JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
}
/*!
@@ -12848,6 +19434,7 @@ class basic_json
@since version 1.1.0
*/
template<typename T>
+ JSON_HEDLEY_NON_NULL(2)
reference operator[](T* key)
{
// implicitly convert null to object
@@ -12859,12 +19446,12 @@ class basic_json
}
// at only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
return m_value.object->operator[](key);
}
- JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+ JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
}
/*!
@@ -12898,16 +19485,17 @@ class basic_json
@since version 1.1.0
*/
template<typename T>
+ JSON_HEDLEY_NON_NULL(2)
const_reference operator[](T* key) const
{
// at only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
assert(m_value.object->find(key) != m_value.object->end());
return m_value.object->find(key)->second;
}
- JSON_THROW(type_error::create(305, "cannot use operator[] with " + std::string(type_name())));
+ JSON_THROW(type_error::create(305, "cannot use operator[] with a string argument with " + std::string(type_name())));
}
/*!
@@ -12943,6 +19531,8 @@ class basic_json
@return copy of the element at key @a key or @a default_value if @a key
is not found
+ @throw type_error.302 if @a default_value does not match the type of the
+ value at @a key
@throw type_error.306 if the JSON value is not an object; in that case,
using `value()` with a key makes no sense.
@@ -12959,11 +19549,12 @@ class basic_json
@since version 1.0.0
*/
template<class ValueType, typename std::enable_if<
- std::is_convertible<basic_json_t, ValueType>::value, int>::type = 0>
+ std::is_convertible<basic_json_t, ValueType>::value
+ and not std::is_same<value_t, ValueType>::value, int>::type = 0>
ValueType value(const typename object_t::key_type& key, const ValueType& default_value) const
{
// at only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
// if key is found, return value and given default value otherwise
const auto it = find(key);
@@ -12980,7 +19571,7 @@ class basic_json
/*!
@brief overload for a default value of type const char*
- @copydoc basic_json::value(const typename object_t::key_type&, ValueType) const
+ @copydoc basic_json::value(const typename object_t::key_type&, const ValueType&) const
*/
string_t value(const typename object_t::key_type& key, const char* default_value) const
{
@@ -13016,7 +19607,9 @@ class basic_json
@return copy of the element at key @a key or @a default_value if @a key
is not found
- @throw type_error.306 if the JSON value is not an objec; in that case,
+ @throw type_error.302 if @a default_value does not match the type of the
+ value at @a ptr
+ @throw type_error.306 if the JSON value is not an object; in that case,
using `value()` with a key makes no sense.
@complexity Logarithmic in the size of the container.
@@ -13033,14 +19626,14 @@ class basic_json
ValueType value(const json_pointer& ptr, const ValueType& default_value) const
{
// at only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
// if pointer resolves a value, return it or use default value
JSON_TRY
{
return ptr.get_checked(this);
}
- JSON_CATCH (out_of_range&)
+ JSON_INTERNAL_CATCH (out_of_range&)
{
return default_value;
}
@@ -13053,6 +19646,7 @@ class basic_json
@brief overload for a default value of type const char*
@copydoc basic_json::value(const json_pointer&, ValueType) const
*/
+ JSON_HEDLEY_NON_NULL(3)
string_t value(const json_pointer& ptr, const char* default_value) const
{
return value(ptr, string_t(default_value));
@@ -13065,8 +19659,8 @@ class basic_json
container `c`, the expression `c.front()` is equivalent to `*c.begin()`.
@return In case of a structured type (array or object), a reference to the
- first element is returned. In case of number, string, or boolean values, a
- reference to the value is returned.
+ first element is returned. In case of number, string, boolean, or binary
+ values, a reference to the value is returned.
@complexity Constant.
@@ -13108,8 +19702,8 @@ class basic_json
@endcode
@return In case of a structured type (array or object), a reference to the
- last element is returned. In case of number, string, or boolean values, a
- reference to the value is returned.
+ last element is returned. In case of number, string, boolean, or binary
+ values, a reference to the value is returned.
@complexity Constant.
@@ -13175,7 +19769,7 @@ class basic_json
@complexity The complexity depends on the type:
- objects: amortized constant
- arrays: linear in distance between @a pos and the end of the container
- - strings: linear in the length of the string
+ - strings and binary: linear in the length of the member
- other types: constant
@liveexample{The example shows the result of `erase()` for different JSON
@@ -13197,7 +19791,7 @@ class basic_json
IteratorType erase(IteratorType pos)
{
// make sure iterator fits the current value
- if (JSON_UNLIKELY(this != pos.m_object))
+ if (JSON_HEDLEY_UNLIKELY(this != pos.m_object))
{
JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value"));
}
@@ -13211,8 +19805,9 @@ class basic_json
case value_t::number_integer:
case value_t::number_unsigned:
case value_t::string:
+ case value_t::binary:
{
- if (JSON_UNLIKELY(not pos.m_it.primitive_iterator.is_begin()))
+ if (JSON_HEDLEY_UNLIKELY(not pos.m_it.primitive_iterator.is_begin()))
{
JSON_THROW(invalid_iterator::create(205, "iterator out of range"));
}
@@ -13224,6 +19819,13 @@ class basic_json
std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.string, 1);
m_value.string = nullptr;
}
+ else if (is_binary())
+ {
+ AllocatorType<binary_t> alloc;
+ std::allocator_traits<decltype(alloc)>::destroy(alloc, m_value.binary);
+ std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.binary, 1);
+ m_value.binary = nullptr;
+ }
m_type = value_t::null;
assert_invariant();
@@ -13281,7 +19883,7 @@ class basic_json
- objects: `log(size()) + std::distance(first, last)`
- arrays: linear in the distance between @a first and @a last, plus linear
in the distance between @a last and end of the container
- - strings: linear in the length of the string
+ - strings and binary: linear in the length of the member
- other types: constant
@liveexample{The example shows the result of `erase()` for different JSON
@@ -13302,7 +19904,7 @@ class basic_json
IteratorType erase(IteratorType first, IteratorType last)
{
// make sure iterator fits the current value
- if (JSON_UNLIKELY(this != first.m_object or this != last.m_object))
+ if (JSON_HEDLEY_UNLIKELY(this != first.m_object or this != last.m_object))
{
JSON_THROW(invalid_iterator::create(203, "iterators do not fit current value"));
}
@@ -13316,9 +19918,10 @@ class basic_json
case value_t::number_integer:
case value_t::number_unsigned:
case value_t::string:
+ case value_t::binary:
{
- if (JSON_LIKELY(not first.m_it.primitive_iterator.is_begin()
- or not last.m_it.primitive_iterator.is_end()))
+ if (JSON_HEDLEY_LIKELY(not first.m_it.primitive_iterator.is_begin()
+ or not last.m_it.primitive_iterator.is_end()))
{
JSON_THROW(invalid_iterator::create(204, "iterators out of range"));
}
@@ -13330,6 +19933,13 @@ class basic_json
std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.string, 1);
m_value.string = nullptr;
}
+ else if (is_binary())
+ {
+ AllocatorType<binary_t> alloc;
+ std::allocator_traits<decltype(alloc)>::destroy(alloc, m_value.binary);
+ std::allocator_traits<decltype(alloc)>::deallocate(alloc, m_value.binary, 1);
+ m_value.binary = nullptr;
+ }
m_type = value_t::null;
assert_invariant();
@@ -13389,7 +19999,7 @@ class basic_json
size_type erase(const typename object_t::key_type& key)
{
// this erase only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
return m_value.object->erase(key);
}
@@ -13424,9 +20034,9 @@ class basic_json
void erase(const size_type idx)
{
// this erase only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
- if (JSON_UNLIKELY(idx >= size()))
+ if (JSON_HEDLEY_UNLIKELY(idx >= size()))
{
JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range"));
}
@@ -13469,6 +20079,8 @@ class basic_json
@liveexample{The example shows how `find()` is used.,find__key_type}
+ @sa @ref contains(KeyT&&) const -- checks whether a key exists
+
@since version 1.0.0
*/
template<typename KeyT>
@@ -13529,6 +20141,69 @@ class basic_json
return is_object() ? m_value.object->count(std::forward<KeyT>(key)) : 0;
}
+ /*!
+ @brief check the existence of an element in a JSON object
+
+ Check whether an element exists in a JSON object with key equivalent to
+ @a key. If the element is not found or the JSON value is not an object,
+ false is returned.
+
+ @note This method always returns false when executed on a JSON type
+ that is not an object.
+
+ @param[in] key key value to check its existence.
+
+ @return true if an element with specified @a key exists. If no such
+ element with such key is found or the JSON value is not an object,
+ false is returned.
+
+ @complexity Logarithmic in the size of the JSON object.
+
+ @liveexample{The following code shows an example for `contains()`.,contains}
+
+ @sa @ref find(KeyT&&) -- returns an iterator to an object element
+ @sa @ref contains(const json_pointer&) const -- checks the existence for a JSON pointer
+
+ @since version 3.6.0
+ */
+ template<typename KeyT, typename std::enable_if<
+ not std::is_same<typename std::decay<KeyT>::type, json_pointer>::value, int>::type = 0>
+ bool contains(KeyT && key) const
+ {
+ return is_object() and m_value.object->find(std::forward<KeyT>(key)) != m_value.object->end();
+ }
+
+ /*!
+ @brief check the existence of an element in a JSON object given a JSON pointer
+
+ Check whether the given JSON pointer @a ptr can be resolved in the current
+ JSON value.
+
+ @note This method can be executed on any JSON value type.
+
+ @param[in] ptr JSON pointer to check its existence.
+
+ @return true if the JSON pointer can be resolved to a stored value, false
+ otherwise.
+
+ @post If `j.contains(ptr)` returns true, it is safe to call `j[ptr]`.
+
+ @throw parse_error.106 if an array index begins with '0'
+ @throw parse_error.109 if an array index was not a number
+
+ @complexity Logarithmic in the size of the JSON object.
+
+ @liveexample{The following code shows an example for `contains()`.,contains_json_pointer}
+
+ @sa @ref contains(KeyT &&) const -- checks the existence of a key
+
+ @since version 3.7.0
+ */
+ bool contains(const json_pointer& ptr) const
+ {
+ return ptr.contains(this);
+ }
+
/// @}
@@ -13551,7 +20226,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
@@ -13590,7 +20265,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
- Has the semantics of `const_cast<const basic_json&>(*this).begin()`.
@@ -13622,7 +20297,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
@@ -13661,7 +20336,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
- Has the semantics of `const_cast<const basic_json&>(*this).end()`.
@@ -13691,7 +20366,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+ [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
requirements:
- The complexity is constant.
- Has the semantics of `reverse_iterator(end())`.
@@ -13728,7 +20403,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+ [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
requirements:
- The complexity is constant.
- Has the semantics of `reverse_iterator(begin())`.
@@ -13765,7 +20440,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+ [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
requirements:
- The complexity is constant.
- Has the semantics of `const_cast<const basic_json&>(*this).rbegin()`.
@@ -13794,7 +20469,7 @@ class basic_json
@complexity Constant.
@requirement This function helps `basic_json` satisfying the
- [ReversibleContainer](http://en.cppreference.com/w/cpp/concept/ReversibleContainer)
+ [ReversibleContainer](https://en.cppreference.com/w/cpp/named_req/ReversibleContainer)
requirements:
- The complexity is constant.
- Has the semantics of `const_cast<const basic_json&>(*this).rend()`.
@@ -13870,7 +20545,7 @@ class basic_json
future 4.0.0 of the library. Please use @ref items() instead;
that is, replace `json::iterator_wrapper(j)` with `j.items()`.
*/
- JSON_DEPRECATED
+ JSON_HEDLEY_DEPRECATED_FOR(3.1.0, items())
static iteration_proxy<iterator> iterator_wrapper(reference ref) noexcept
{
return ref.items();
@@ -13879,7 +20554,7 @@ class basic_json
/*!
@copydoc iterator_wrapper(reference)
*/
- JSON_DEPRECATED
+ JSON_HEDLEY_DEPRECATED_FOR(3.1.0, items())
static iteration_proxy<const_iterator> iterator_wrapper(const_reference ref) noexcept
{
return ref.items();
@@ -13915,9 +20590,20 @@ class basic_json
Range-based for loop with `items()` function:
@code{cpp}
- for (auto it : j_object.items())
+ for (auto& el : j_object.items())
{
- std::cout << "key: " << it.key() << ", value:" << it.value() << '\n';
+ std::cout << "key: " << el.key() << ", value:" << el.value() << '\n';
+ }
+ @endcode
+
+ The `items()` function also allows to use
+ [structured bindings](https://en.cppreference.com/w/cpp/language/structured_binding)
+ (C++17):
+
+ @code{cpp}
+ for (auto& [key, val] : j_object.items())
+ {
+ std::cout << "key: " << key << ", value:" << val << '\n';
}
@endcode
@@ -13925,6 +20611,11 @@ class basic_json
element as string (see example). For primitive types (e.g., numbers),
`key()` returns an empty string.
+ @warning Using `items()` on temporary objects is dangerous. Make sure the
+ object's lifetime exeeds the iteration. See
+ <https://github.com/nlohmann/json/issues/2040> for more
+ information.
+
@return iteration proxy object wrapping @a ref with an interface to use in
range-based for loops
@@ -13935,7 +20626,7 @@ class basic_json
@complexity Constant.
- @since version 3.x.x.
+ @since version 3.1.0, structured bindings support since 3.5.0.
*/
iteration_proxy<iterator> items() noexcept
{
@@ -13973,6 +20664,7 @@ class basic_json
boolean | `false`
string | `false`
number | `false`
+ binary | `false`
object | result of function `object_t::empty()`
array | result of function `array_t::empty()`
@@ -13992,7 +20684,7 @@ class basic_json
false in the case of a string.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
- Has the semantics of `begin() == end()`.
@@ -14044,6 +20736,7 @@ class basic_json
boolean | `1`
string | `1`
number | `1`
+ binary | `1`
object | result of function object_t::size()
array | result of function array_t::size()
@@ -14063,7 +20756,7 @@ class basic_json
the case of a string.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
- Has the semantics of `std::distance(begin(), end())`.
@@ -14118,6 +20811,7 @@ class basic_json
boolean | `1` (same as `size()`)
string | `1` (same as `size()`)
number | `1` (same as `size()`)
+ binary | `1` (same as `size()`)
object | result of function `object_t::max_size()`
array | result of function `array_t::max_size()`
@@ -14133,7 +20827,7 @@ class basic_json
@exceptionsafety No-throw guarantee: this function never throws exceptions.
@requirement This function helps `basic_json` satisfying the
- [Container](http://en.cppreference.com/w/cpp/concept/Container)
+ [Container](https://en.cppreference.com/w/cpp/named_req/Container)
requirements:
- The complexity is constant.
- Has the semantics of returning `b.size()` where `b` is the largest
@@ -14190,6 +20884,7 @@ class basic_json
boolean | `false`
string | `""`
number | `0`
+ binary | An empty byte vector
object | `{}`
array | `[]`
@@ -14247,6 +20942,12 @@ class basic_json
break;
}
+ case value_t::binary:
+ {
+ m_value.binary->clear();
+ break;
+ }
+
case value_t::array:
{
m_value.array->clear();
@@ -14287,7 +20988,7 @@ class basic_json
void push_back(basic_json&& val)
{
// push_back only works for null objects or arrays
- if (JSON_UNLIKELY(not(is_null() or is_array())))
+ if (JSON_HEDLEY_UNLIKELY(not(is_null() or is_array())))
{
JSON_THROW(type_error::create(308, "cannot use push_back() with " + std::string(type_name())));
}
@@ -14302,8 +21003,7 @@ class basic_json
// add element to array (move semantics)
m_value.array->push_back(std::move(val));
- // invalidate object
- val.m_type = value_t::null;
+ // if val is moved from, basic_json move constructor marks it null so we do not call the destructor
}
/*!
@@ -14323,7 +21023,7 @@ class basic_json
void push_back(const basic_json& val)
{
// push_back only works for null objects or arrays
- if (JSON_UNLIKELY(not(is_null() or is_array())))
+ if (JSON_HEDLEY_UNLIKELY(not(is_null() or is_array())))
{
JSON_THROW(type_error::create(308, "cannot use push_back() with " + std::string(type_name())));
}
@@ -14373,7 +21073,7 @@ class basic_json
void push_back(const typename object_t::value_type& val)
{
// push_back only works for null objects or objects
- if (JSON_UNLIKELY(not(is_null() or is_object())))
+ if (JSON_HEDLEY_UNLIKELY(not(is_null() or is_object())))
{
JSON_THROW(type_error::create(308, "cannot use push_back() with " + std::string(type_name())));
}
@@ -14459,6 +21159,8 @@ class basic_json
@param[in] args arguments to forward to a constructor of @ref basic_json
@tparam Args compatible types to create a @ref basic_json object
+ @return reference to the inserted element
+
@throw type_error.311 when called on a type other than JSON array or
null; example: `"cannot use emplace_back() with number"`
@@ -14468,13 +21170,13 @@ class basic_json
elements to a JSON array. Note how the `null` value was silently converted
to a JSON array.,emplace_back}
- @since version 2.0.8
+ @since version 2.0.8, returns reference since 3.7.0
*/
template<class... Args>
- void emplace_back(Args&& ... args)
+ reference emplace_back(Args&& ... args)
{
// emplace_back only works for null objects or arrays
- if (JSON_UNLIKELY(not(is_null() or is_array())))
+ if (JSON_HEDLEY_UNLIKELY(not(is_null() or is_array())))
{
JSON_THROW(type_error::create(311, "cannot use emplace_back() with " + std::string(type_name())));
}
@@ -14488,7 +21190,12 @@ class basic_json
}
// add element to array (perfect forwarding)
+#ifdef JSON_HAS_CPP_17
+ return m_value.array->emplace_back(std::forward<Args>(args)...);
+#else
m_value.array->emplace_back(std::forward<Args>(args)...);
+ return m_value.array->back();
+#endif
}
/*!
@@ -14522,7 +21229,7 @@ class basic_json
std::pair<iterator, bool> emplace(Args&& ... args)
{
// emplace only works for null objects or arrays
- if (JSON_UNLIKELY(not(is_null() or is_object())))
+ if (JSON_HEDLEY_UNLIKELY(not(is_null() or is_object())))
{
JSON_THROW(type_error::create(311, "cannot use emplace() with " + std::string(type_name())));
}
@@ -14545,6 +21252,26 @@ class basic_json
return {it, res.second};
}
+ /// Helper for insertion of an iterator
+ /// @note: This uses std::distance to support GCC 4.8,
+ /// see https://github.com/nlohmann/json/pull/1257
+ template<typename... Args>
+ iterator insert_iterator(const_iterator pos, Args&& ... args)
+ {
+ iterator result(this);
+ assert(m_value.array != nullptr);
+
+ auto insert_pos = std::distance(m_value.array->begin(), pos.m_it.array_iterator);
+ m_value.array->insert(pos.m_it.array_iterator, std::forward<Args>(args)...);
+ result.m_it.array_iterator = m_value.array->begin() + insert_pos;
+
+ // This could have been written as:
+ // result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, cnt, val);
+ // but the return value of insert is missing in GCC 4.8, so it is written this way instead.
+
+ return result;
+ }
+
/*!
@brief inserts element
@@ -14570,18 +21297,16 @@ class basic_json
iterator insert(const_iterator pos, const basic_json& val)
{
// insert only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
// check if iterator pos fits to this JSON value
- if (JSON_UNLIKELY(pos.m_object != this))
+ if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
{
JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value"));
}
// insert to array and return iterator
- iterator result(this);
- result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, val);
- return result;
+ return insert_iterator(pos, val);
}
JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
@@ -14623,18 +21348,16 @@ class basic_json
iterator insert(const_iterator pos, size_type cnt, const basic_json& val)
{
// insert only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
// check if iterator pos fits to this JSON value
- if (JSON_UNLIKELY(pos.m_object != this))
+ if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
{
JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value"));
}
// insert to array and return iterator
- iterator result(this);
- result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, cnt, val);
- return result;
+ return insert_iterator(pos, cnt, val);
}
JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
@@ -14673,35 +21396,30 @@ class basic_json
iterator insert(const_iterator pos, const_iterator first, const_iterator last)
{
// insert only works for arrays
- if (JSON_UNLIKELY(not is_array()))
+ if (JSON_HEDLEY_UNLIKELY(not is_array()))
{
JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
}
// check if iterator pos fits to this JSON value
- if (JSON_UNLIKELY(pos.m_object != this))
+ if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
{
JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value"));
}
// check if range iterators belong to the same JSON object
- if (JSON_UNLIKELY(first.m_object != last.m_object))
+ if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
{
JSON_THROW(invalid_iterator::create(210, "iterators do not fit"));
}
- if (JSON_UNLIKELY(first.m_object == this))
+ if (JSON_HEDLEY_UNLIKELY(first.m_object == this))
{
JSON_THROW(invalid_iterator::create(211, "passed iterators may not belong to container"));
}
// insert to array and return iterator
- iterator result(this);
- result.m_it.array_iterator = m_value.array->insert(
- pos.m_it.array_iterator,
- first.m_it.array_iterator,
- last.m_it.array_iterator);
- return result;
+ return insert_iterator(pos, first.m_it.array_iterator, last.m_it.array_iterator);
}
/*!
@@ -14731,21 +21449,19 @@ class basic_json
iterator insert(const_iterator pos, initializer_list_t ilist)
{
// insert only works for arrays
- if (JSON_UNLIKELY(not is_array()))
+ if (JSON_HEDLEY_UNLIKELY(not is_array()))
{
JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
}
// check if iterator pos fits to this JSON value
- if (JSON_UNLIKELY(pos.m_object != this))
+ if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
{
JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value"));
}
// insert to array and return iterator
- iterator result(this);
- result.m_it.array_iterator = m_value.array->insert(pos.m_it.array_iterator, ilist.begin(), ilist.end());
- return result;
+ return insert_iterator(pos, ilist.begin(), ilist.end());
}
/*!
@@ -14774,19 +21490,19 @@ class basic_json
void insert(const_iterator first, const_iterator last)
{
// insert only works for objects
- if (JSON_UNLIKELY(not is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not is_object()))
{
JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name())));
}
// check if range iterators belong to the same JSON object
- if (JSON_UNLIKELY(first.m_object != last.m_object))
+ if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
{
JSON_THROW(invalid_iterator::create(210, "iterators do not fit"));
}
// passed iterators must belong to objects
- if (JSON_UNLIKELY(not first.m_object->is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not first.m_object->is_object()))
{
JSON_THROW(invalid_iterator::create(202, "iterators first and last must point to objects"));
}
@@ -14823,11 +21539,11 @@ class basic_json
assert_invariant();
}
- if (JSON_UNLIKELY(not is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not is_object()))
{
JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(type_name())));
}
- if (JSON_UNLIKELY(not j.is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not j.is_object()))
{
JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(j.type_name())));
}
@@ -14874,20 +21590,20 @@ class basic_json
assert_invariant();
}
- if (JSON_UNLIKELY(not is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not is_object()))
{
JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(type_name())));
}
// check if range iterators belong to the same JSON object
- if (JSON_UNLIKELY(first.m_object != last.m_object))
+ if (JSON_HEDLEY_UNLIKELY(first.m_object != last.m_object))
{
JSON_THROW(invalid_iterator::create(210, "iterators do not fit"));
}
// passed iterators must belong to objects
- if (JSON_UNLIKELY(not first.m_object->is_object()
- or not last.m_object->is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not first.m_object->is_object()
+ or not last.m_object->is_object()))
{
JSON_THROW(invalid_iterator::create(202, "iterators first and last must point to objects"));
}
@@ -14950,7 +21666,7 @@ class basic_json
void swap(array_t& other)
{
// swap only works for arrays
- if (JSON_LIKELY(is_array()))
+ if (JSON_HEDLEY_LIKELY(is_array()))
{
std::swap(*(m_value.array), other);
}
@@ -14983,7 +21699,7 @@ class basic_json
void swap(object_t& other)
{
// swap only works for objects
- if (JSON_LIKELY(is_object()))
+ if (JSON_HEDLEY_LIKELY(is_object()))
{
std::swap(*(m_value.object), other);
}
@@ -15016,7 +21732,7 @@ class basic_json
void swap(string_t& other)
{
// swap only works for strings
- if (JSON_LIKELY(is_string()))
+ if (JSON_HEDLEY_LIKELY(is_string()))
{
std::swap(*(m_value.string), other);
}
@@ -15026,6 +21742,53 @@ class basic_json
}
}
+ /*!
+ @brief exchanges the values
+
+ Exchanges the contents of a JSON string with those of @a other. Does not
+ invoke any move, copy, or swap operations on individual elements. All
+ iterators and references remain valid. The past-the-end iterator is
+ invalidated.
+
+ @param[in,out] other binary to exchange the contents with
+
+ @throw type_error.310 when JSON value is not a string; example: `"cannot
+ use swap() with boolean"`
+
+ @complexity Constant.
+
+ @liveexample{The example below shows how strings can be swapped with
+ `swap()`.,swap__binary_t}
+
+ @since version 3.8.0
+ */
+ void swap(binary_t& other)
+ {
+ // swap only works for strings
+ if (JSON_HEDLEY_LIKELY(is_binary()))
+ {
+ std::swap(*(m_value.binary), other);
+ }
+ else
+ {
+ JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name())));
+ }
+ }
+
+ /// @copydoc swap(binary_t)
+ void swap(typename binary_t::container_type& other)
+ {
+ // swap only works for strings
+ if (JSON_HEDLEY_LIKELY(is_binary()))
+ {
+ std::swap(*(m_value.binary), other);
+ }
+ else
+ {
+ JSON_THROW(type_error::create(310, "cannot use swap() with " + std::string(type_name())));
+ }
+ }
+
/// @}
public:
@@ -15044,13 +21807,13 @@ class basic_json
their stored values are the same according to their respective
`operator==`.
- Integer and floating-point numbers are automatically converted before
- comparison. Note than two NaN values are always treated as unequal.
+ comparison. Note that two NaN values are always treated as unequal.
- Two JSON null values are equal.
@note Floating-point inside JSON values numbers are compared with
`json::number_float_t::operator==` which is `double::operator==` by
default. To compare floating-point while respecting an epsilon, an alternative
- [comparison function](https://github.com/mariokonrad/marnav/blob/master/src/marnav/math/floatingpoint.hpp#L34-#L39)
+ [comparison function](https://github.com/mariokonrad/marnav/blob/master/include/marnav/math/floatingpoint.hpp#L34-#L39)
could be used, for instance
@code {.cpp}
template<typename T, typename = typename std::enable_if<std::is_floating_point<T>::value, T>::type>
@@ -15059,6 +21822,22 @@ class basic_json
return std::abs(a - b) <= epsilon;
}
@endcode
+ Or you can self-defined operator equal function like this:
+ @code {.cpp}
+ bool my_equal(const_reference lhs, const_reference rhs) {
+ const auto lhs_type lhs.type();
+ const auto rhs_type rhs.type();
+ if (lhs_type == rhs_type) {
+ switch(lhs_type)
+ // self_defined case
+ case value_t::number_float:
+ return std::abs(lhs - rhs) <= std::numeric_limits<float>::epsilon();
+ // other cases remain the same with the original
+ ...
+ }
+ ...
+ }
+ @endcode
@note NaN values never compare equal to themselves or to other NaN values.
@@ -15085,28 +21864,31 @@ class basic_json
switch (lhs_type)
{
case value_t::array:
- return (*lhs.m_value.array == *rhs.m_value.array);
+ return *lhs.m_value.array == *rhs.m_value.array;
case value_t::object:
- return (*lhs.m_value.object == *rhs.m_value.object);
+ return *lhs.m_value.object == *rhs.m_value.object;
case value_t::null:
return true;
case value_t::string:
- return (*lhs.m_value.string == *rhs.m_value.string);
+ return *lhs.m_value.string == *rhs.m_value.string;
case value_t::boolean:
- return (lhs.m_value.boolean == rhs.m_value.boolean);
+ return lhs.m_value.boolean == rhs.m_value.boolean;
case value_t::number_integer:
- return (lhs.m_value.number_integer == rhs.m_value.number_integer);
+ return lhs.m_value.number_integer == rhs.m_value.number_integer;
case value_t::number_unsigned:
- return (lhs.m_value.number_unsigned == rhs.m_value.number_unsigned);
+ return lhs.m_value.number_unsigned == rhs.m_value.number_unsigned;
case value_t::number_float:
- return (lhs.m_value.number_float == rhs.m_value.number_float);
+ return lhs.m_value.number_float == rhs.m_value.number_float;
+
+ case value_t::binary:
+ return *lhs.m_value.binary == *rhs.m_value.binary;
default:
return false;
@@ -15114,27 +21896,27 @@ class basic_json
}
else if (lhs_type == value_t::number_integer and rhs_type == value_t::number_float)
{
- return (static_cast<number_float_t>(lhs.m_value.number_integer) == rhs.m_value.number_float);
+ return static_cast<number_float_t>(lhs.m_value.number_integer) == rhs.m_value.number_float;
}
else if (lhs_type == value_t::number_float and rhs_type == value_t::number_integer)
{
- return (lhs.m_value.number_float == static_cast<number_float_t>(rhs.m_value.number_integer));
+ return lhs.m_value.number_float == static_cast<number_float_t>(rhs.m_value.number_integer);
}
else if (lhs_type == value_t::number_unsigned and rhs_type == value_t::number_float)
{
- return (static_cast<number_float_t>(lhs.m_value.number_unsigned) == rhs.m_value.number_float);
+ return static_cast<number_float_t>(lhs.m_value.number_unsigned) == rhs.m_value.number_float;
}
else if (lhs_type == value_t::number_float and rhs_type == value_t::number_unsigned)
{
- return (lhs.m_value.number_float == static_cast<number_float_t>(rhs.m_value.number_unsigned));
+ return lhs.m_value.number_float == static_cast<number_float_t>(rhs.m_value.number_unsigned);
}
else if (lhs_type == value_t::number_unsigned and rhs_type == value_t::number_integer)
{
- return (static_cast<number_integer_t>(lhs.m_value.number_unsigned) == rhs.m_value.number_integer);
+ return static_cast<number_integer_t>(lhs.m_value.number_unsigned) == rhs.m_value.number_integer;
}
else if (lhs_type == value_t::number_integer and rhs_type == value_t::number_unsigned)
{
- return (lhs.m_value.number_integer == static_cast<number_integer_t>(rhs.m_value.number_unsigned));
+ return lhs.m_value.number_integer == static_cast<number_integer_t>(rhs.m_value.number_unsigned);
}
return false;
@@ -15148,7 +21930,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator==(const_reference lhs, const ScalarType rhs) noexcept
{
- return (lhs == basic_json(rhs));
+ return lhs == basic_json(rhs);
}
/*!
@@ -15159,7 +21941,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator==(const ScalarType lhs, const_reference rhs) noexcept
{
- return (basic_json(lhs) == rhs);
+ return basic_json(lhs) == rhs;
}
/*!
@@ -15193,7 +21975,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator!=(const_reference lhs, const ScalarType rhs) noexcept
{
- return (lhs != basic_json(rhs));
+ return lhs != basic_json(rhs);
}
/*!
@@ -15204,7 +21986,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator!=(const ScalarType lhs, const_reference rhs) noexcept
{
- return (basic_json(lhs) != rhs);
+ return basic_json(lhs) != rhs;
}
/*!
@@ -15243,28 +22025,33 @@ class basic_json
switch (lhs_type)
{
case value_t::array:
+ // note parentheses are necessary, see
+ // https://github.com/nlohmann/json/issues/1530
return (*lhs.m_value.array) < (*rhs.m_value.array);
case value_t::object:
- return *lhs.m_value.object < *rhs.m_value.object;
+ return (*lhs.m_value.object) < (*rhs.m_value.object);
case value_t::null:
return false;
case value_t::string:
- return *lhs.m_value.string < *rhs.m_value.string;
+ return (*lhs.m_value.string) < (*rhs.m_value.string);
case value_t::boolean:
- return lhs.m_value.boolean < rhs.m_value.boolean;
+ return (lhs.m_value.boolean) < (rhs.m_value.boolean);
case value_t::number_integer:
- return lhs.m_value.number_integer < rhs.m_value.number_integer;
+ return (lhs.m_value.number_integer) < (rhs.m_value.number_integer);
case value_t::number_unsigned:
- return lhs.m_value.number_unsigned < rhs.m_value.number_unsigned;
+ return (lhs.m_value.number_unsigned) < (rhs.m_value.number_unsigned);
case value_t::number_float:
- return lhs.m_value.number_float < rhs.m_value.number_float;
+ return (lhs.m_value.number_float) < (rhs.m_value.number_float);
+
+ case value_t::binary:
+ return (*lhs.m_value.binary) < (*rhs.m_value.binary);
default:
return false;
@@ -15309,7 +22096,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator<(const_reference lhs, const ScalarType rhs) noexcept
{
- return (lhs < basic_json(rhs));
+ return lhs < basic_json(rhs);
}
/*!
@@ -15320,7 +22107,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator<(const ScalarType lhs, const_reference rhs) noexcept
{
- return (basic_json(lhs) < rhs);
+ return basic_json(lhs) < rhs;
}
/*!
@@ -15355,7 +22142,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator<=(const_reference lhs, const ScalarType rhs) noexcept
{
- return (lhs <= basic_json(rhs));
+ return lhs <= basic_json(rhs);
}
/*!
@@ -15366,7 +22153,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator<=(const ScalarType lhs, const_reference rhs) noexcept
{
- return (basic_json(lhs) <= rhs);
+ return basic_json(lhs) <= rhs;
}
/*!
@@ -15401,7 +22188,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator>(const_reference lhs, const ScalarType rhs) noexcept
{
- return (lhs > basic_json(rhs));
+ return lhs > basic_json(rhs);
}
/*!
@@ -15412,7 +22199,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator>(const ScalarType lhs, const_reference rhs) noexcept
{
- return (basic_json(lhs) > rhs);
+ return basic_json(lhs) > rhs;
}
/*!
@@ -15447,7 +22234,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator>=(const_reference lhs, const ScalarType rhs) noexcept
{
- return (lhs >= basic_json(rhs));
+ return lhs >= basic_json(rhs);
}
/*!
@@ -15458,7 +22245,7 @@ class basic_json
std::is_scalar<ScalarType>::value, int>::type = 0>
friend bool operator>=(const ScalarType lhs, const_reference rhs) noexcept
{
- return (basic_json(lhs) >= rhs);
+ return basic_json(lhs) >= rhs;
}
/// @}
@@ -15504,8 +22291,8 @@ class basic_json
friend std::ostream& operator<<(std::ostream& o, const basic_json& j)
{
// read width member and use it as indentation parameter if nonzero
- const bool pretty_print = (o.width() > 0);
- const auto indentation = (pretty_print ? o.width() : 0);
+ const bool pretty_print = o.width() > 0;
+ const auto indentation = pretty_print ? o.width() : 0;
// reset width to 0 for subsequent calls to this stream
o.width(0);
@@ -15524,7 +22311,7 @@ class basic_json
instead; that is, replace calls like `j >> o;` with `o << j;`.
@since version 1.0.0; deprecated since version 3.0.0
*/
- JSON_DEPRECATED
+ JSON_HEDLEY_DEPRECATED_FOR(3.0.0, operator<<(std::ostream&, const basic_json&))
friend std::ostream& operator>>(const basic_json& j, std::ostream& o)
{
return o << j;
@@ -15543,39 +22330,24 @@ class basic_json
/*!
@brief deserialize from a compatible input
- This function reads from a compatible input. Examples are:
- - an array of 1-byte values
- - strings with character/literal type with size of 1 byte
- - input streams
- - container with contiguous storage of 1-byte values. Compatible container
- types include `std::vector`, `std::string`, `std::array`,
- `std::valarray`, and `std::initializer_list`. Furthermore, C-style
- arrays can be used with `std::begin()`/`std::end()`. User-defined
- containers can be used as long as they implement random-access iterators
- and a contiguous storage.
-
- @pre Each element of the container has a size of 1 byte. Violating this
- precondition yields undefined behavior. **This precondition is enforced
- with a static assertion.**
-
- @pre The container storage is contiguous. Violating this precondition
- yields undefined behavior. **This precondition is enforced with an
- assertion.**
- @pre Each element of the container has a size of 1 byte. Violating this
- precondition yields undefined behavior. **This precondition is enforced
- with a static assertion.**
-
- @warning There is no way to enforce all preconditions at compile-time. If
- the function is called with a noncompliant container and with
- assertions switched off, the behavior is undefined and will most
- likely yield segmentation violation.
+ @tparam InputType A compatible input, for instance
+ - an std::istream object
+ - a FILE pointer
+ - a C-style array of characters
+ - a pointer to a null-terminated string of single byte characters
+ - an object obj for which begin(obj) and end(obj) produces a valid pair of
+ iterators.
@param[in] i input to read from
@param[in] cb a parser callback function of type @ref parser_callback_t
which is used to control the deserialization by filtering unwanted values
(optional)
+ @param[in] allow_exceptions whether to throw exceptions in case of a
+ parse error (optional, true by default)
- @return result of the deserialization
+ @return deserialized JSON value; in case of a parse error and
+ @a allow_exceptions set to `false`, the return value will be
+ value_t::discarded.
@throw parse_error.101 if a parse error occurs; example: `""unexpected end
of input; expected string literal""`
@@ -15584,7 +22356,7 @@ class basic_json
@complexity Linear in the length of the input. The parser is a predictive
LL(1) parser. The complexity can be higher if the parser callback function
- @a cb has a super-linear complexity.
+ @a cb or reading from the input @a i has a super-linear complexity.
@note A UTF-8 byte order mark is silently ignored.
@@ -15602,104 +22374,181 @@ class basic_json
@since version 2.0.3 (contiguous containers)
*/
- static basic_json parse(detail::input_adapter i,
+ template<typename InputType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json parse(InputType&& i,
const parser_callback_t cb = nullptr,
const bool allow_exceptions = true)
{
basic_json result;
- parser(i, cb, allow_exceptions).parse(true, result);
+ parser(detail::input_adapter(std::forward<InputType>(i)), cb, allow_exceptions).parse(true, result);
return result;
}
/*!
- @copydoc basic_json parse(detail::input_adapter, const parser_callback_t)
+ @brief deserialize from a pair of character iterators
+
+ The value_type of the iterator must be a integral type with size of 1, 2 or
+ 4 bytes, which will be interpreted respectively as UTF-8, UTF-16 and UTF-32.
+
+ @param[in] first iterator to start of character range
+ @param[in] last iterator to end of character range
+ @param[in] cb a parser callback function of type @ref parser_callback_t
+ which is used to control the deserialization by filtering unwanted values
+ (optional)
+ @param[in] allow_exceptions whether to throw exceptions in case of a
+ parse error (optional, true by default)
+
+ @return deserialized JSON value; in case of a parse error and
+ @a allow_exceptions set to `false`, the return value will be
+ value_t::discarded.
+
+ @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+ of input; expected string literal""`
+ @throw parse_error.102 if to_unicode fails or surrogate error
+ @throw parse_error.103 if to_unicode fails
*/
- static basic_json parse(detail::input_adapter& i,
+ template<typename IteratorType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json parse(IteratorType first,
+ IteratorType last,
const parser_callback_t cb = nullptr,
const bool allow_exceptions = true)
{
basic_json result;
- parser(i, cb, allow_exceptions).parse(true, result);
+ parser(detail::input_adapter(std::move(first), std::move(last)), cb, allow_exceptions).parse(true, result);
return result;
}
- static bool accept(detail::input_adapter i)
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, parse(ptr, ptr + len))
+ static basic_json parse(detail::span_input_adapter&& i,
+ const parser_callback_t cb = nullptr,
+ const bool allow_exceptions = true)
{
- return parser(i).accept(true);
+ basic_json result;
+ parser(i.get(), cb, allow_exceptions).parse(true, result);
+ return result;
}
- static bool accept(detail::input_adapter& i)
+ /*!
+ @brief check if the input is valid JSON
+
+ Unlike the @ref parse(InputType&&, const parser_callback_t,const bool)
+ function, this function neither throws an exception in case of invalid JSON
+ input (i.e., a parse error) nor creates diagnostic information.
+
+ @tparam InputType A compatible input, for instance
+ - an std::istream object
+ - a FILE pointer
+ - a C-style array of characters
+ - a pointer to a null-terminated string of single byte characters
+ - an object obj for which begin(obj) and end(obj) produces a valid pair of
+ iterators.
+
+ @param[in] i input to read from
+
+ @return Whether the input read from @a i is valid JSON.
+
+ @complexity Linear in the length of the input. The parser is a predictive
+ LL(1) parser.
+
+ @note A UTF-8 byte order mark is silently ignored.
+
+ @liveexample{The example below demonstrates the `accept()` function reading
+ from a string.,accept__string}
+ */
+ template<typename InputType>
+ static bool accept(InputType&& i)
{
- return parser(i).accept(true);
+ return parser(detail::input_adapter(std::forward<InputType>(i))).accept(true);
}
- /*!
- @brief deserialize from an iterator range with contiguous storage
+ template<typename IteratorType>
+ static bool accept(IteratorType first, IteratorType last)
+ {
+ return parser(detail::input_adapter(std::move(first), std::move(last))).accept(true);
+ }
- This function reads from an iterator range of a container with contiguous
- storage of 1-byte values. Compatible container types include
- `std::vector`, `std::string`, `std::array`, `std::valarray`, and
- `std::initializer_list`. Furthermore, C-style arrays can be used with
- `std::begin()`/`std::end()`. User-defined containers can be used as long
- as they implement random-access iterators and a contiguous storage.
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, accept(ptr, ptr + len))
+ static bool accept(detail::span_input_adapter&& i)
+ {
+ return parser(i.get()).accept(true);
+ }
- @pre The iterator range is contiguous. Violating this precondition yields
- undefined behavior. **This precondition is enforced with an assertion.**
- @pre Each element in the range has a size of 1 byte. Violating this
- precondition yields undefined behavior. **This precondition is enforced
- with a static assertion.**
+ /*!
+ @brief generate SAX events
- @warning There is no way to enforce all preconditions at compile-time. If
- the function is called with noncompliant iterators and with
- assertions switched off, the behavior is undefined and will most
- likely yield segmentation violation.
+ The SAX event lister must follow the interface of @ref json_sax.
- @tparam IteratorType iterator of container with contiguous storage
- @param[in] first begin of the range to parse (included)
- @param[in] last end of the range to parse (excluded)
- @param[in] cb a parser callback function of type @ref parser_callback_t
- which is used to control the deserialization by filtering unwanted values
- (optional)
- @param[in] allow_exceptions whether to throw exceptions in case of a
- parse error (optional, true by default)
+ This function reads from a compatible input. Examples are:
+ - an std::istream object
+ - a FILE pointer
+ - a C-style array of characters
+ - a pointer to a null-terminated string of single byte characters
+ - an object obj for which begin(obj) and end(obj) produces a valid pair of
+ iterators.
+
+ @param[in] i input to read from
+ @param[in,out] sax SAX event listener
+ @param[in] format the format to parse (JSON, CBOR, MessagePack, or UBJSON)
+ @param[in] strict whether the input has to be consumed completely
- @return result of the deserialization
+ @return return value of the last processed SAX event
- @throw parse_error.101 in case of an unexpected token
+ @throw parse_error.101 if a parse error occurs; example: `""unexpected end
+ of input; expected string literal""`
@throw parse_error.102 if to_unicode fails or surrogate error
@throw parse_error.103 if to_unicode fails
@complexity Linear in the length of the input. The parser is a predictive
- LL(1) parser. The complexity can be higher if the parser callback function
- @a cb has a super-linear complexity.
+ LL(1) parser. The complexity can be higher if the SAX consumer @a sax has
+ a super-linear complexity.
@note A UTF-8 byte order mark is silently ignored.
- @liveexample{The example below demonstrates the `parse()` function reading
- from an iterator range.,parse__iteratortype__parser_callback_t}
+ @liveexample{The example below demonstrates the `sax_parse()` function
+ reading from string and processing the events with a user-defined SAX
+ event consumer.,sax_parse}
- @since version 2.0.3
+ @since version 3.2.0
*/
- template<class IteratorType, typename std::enable_if<
- std::is_base_of<
- std::random_access_iterator_tag,
- typename std::iterator_traits<IteratorType>::iterator_category>::value, int>::type = 0>
- static basic_json parse(IteratorType first, IteratorType last,
- const parser_callback_t cb = nullptr,
- const bool allow_exceptions = true)
+ template <typename InputType, typename SAX>
+ JSON_HEDLEY_NON_NULL(2)
+ static bool sax_parse(InputType&& i, SAX* sax,
+ input_format_t format = input_format_t::json,
+ const bool strict = true)
{
- basic_json result;
- parser(detail::input_adapter(first, last), cb, allow_exceptions).parse(true, result);
- return result;
+ auto ia = detail::input_adapter(std::forward<InputType>(i));
+ return format == input_format_t::json
+ ? parser(std::move(ia)).sax_parse(sax, strict)
+ : detail::binary_reader<basic_json, decltype(ia), SAX>(std::move(ia)).sax_parse(format, sax, strict);
}
- template<class IteratorType, typename std::enable_if<
- std::is_base_of<
- std::random_access_iterator_tag,
- typename std::iterator_traits<IteratorType>::iterator_category>::value, int>::type = 0>
- static bool accept(IteratorType first, IteratorType last)
+ template<class IteratorType, class SAX>
+ JSON_HEDLEY_NON_NULL(3)
+ static bool sax_parse(IteratorType first, IteratorType last, SAX* sax,
+ input_format_t format = input_format_t::json,
+ const bool strict = true)
+ {
+ auto ia = detail::input_adapter(std::move(first), std::move(last));
+ return format == input_format_t::json
+ ? parser(std::move(ia)).sax_parse(sax, strict)
+ : detail::binary_reader<basic_json, decltype(ia), SAX>(std::move(ia)).sax_parse(format, sax, strict);
+ }
+
+ template <typename SAX>
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, sax_parse(ptr, ptr + len, ...))
+ JSON_HEDLEY_NON_NULL(2)
+ static bool sax_parse(detail::span_input_adapter&& i, SAX* sax,
+ input_format_t format = input_format_t::json,
+ const bool strict = true)
{
- return parser(detail::input_adapter(first, last)).accept(true);
+ auto ia = i.get();
+ return format == input_format_t::json
+ ? parser(std::move(ia)).sax_parse(sax, strict)
+ : detail::binary_reader<basic_json, decltype(ia), SAX>(std::move(ia)).sax_parse(format, sax, strict);
}
/*!
@@ -15710,7 +22559,7 @@ class basic_json
instead; that is, replace calls like `j << i;` with `i >> j;`.
@since version 1.0.0; deprecated since version 3.0.0
*/
- JSON_DEPRECATED
+ JSON_HEDLEY_DEPRECATED_FOR(3.0.0, operator>>(std::istream&, basic_json&))
friend std::istream& operator<<(basic_json& j, std::istream& i)
{
return operator>>(i, j);
@@ -15768,6 +22617,7 @@ class basic_json
number | `"number"` (for all number types)
object | `"object"`
array | `"array"`
+ binary | `"binary"`
discarded | `"discarded"`
@exceptionsafety No-throw guarantee: this function never throws exceptions.
@@ -15783,6 +22633,7 @@ class basic_json
@since version 1.0.0, public since 2.1.0, `const char*` and `noexcept`
since 3.0.0
*/
+ JSON_HEDLEY_RETURNS_NON_NULL
const char* type_name() const noexcept
{
{
@@ -15798,6 +22649,8 @@ class basic_json
return "string";
case value_t::boolean:
return "boolean";
+ case value_t::binary:
+ return "binary";
case value_t::discarded:
return "discarded";
default:
@@ -15857,7 +22710,8 @@ class basic_json
number_unsigned | 256..65535 | Unsigned integer (2 bytes follow) | 0x19
number_unsigned | 65536..4294967295 | Unsigned integer (4 bytes follow) | 0x1A
number_unsigned | 4294967296..18446744073709551615 | Unsigned integer (8 bytes follow) | 0x1B
- number_float | *any value* | Double-Precision Float | 0xFB
+ number_float | *any value representable by a float* | Single-Precision Float | 0xFA
+ number_float | *any value NOT representable by a float* | Double-Precision Float | 0xFB
string | *length*: 0..23 | UTF-8 string | 0x60..0x77
string | *length*: 23..255 | UTF-8 string (1 byte follow) | 0x78
string | *length*: 256..65535 | UTF-8 string (2 bytes follow) | 0x79
@@ -15873,6 +22727,11 @@ class basic_json
object | *size*: 256..65535 | map (2 bytes follow) | 0xB9
object | *size*: 65536..4294967295 | map (4 bytes follow) | 0xBA
object | *size*: 4294967296..18446744073709551615 | map (8 bytes follow) | 0xBB
+ binary | *size*: 0..23 | byte string | 0x40..0x57
+ binary | *size*: 23..255 | byte string (1 byte follow) | 0x58
+ binary | *size*: 256..65535 | byte string (2 bytes follow) | 0x59
+ binary | *size*: 65536..4294967295 | byte string (4 bytes follow) | 0x5A
+ binary | *size*: 4294967296..18446744073709551615 | byte string (8 bytes follow) | 0x5B
@note The mapping is **complete** in the sense that any JSON value type
can be converted to a CBOR value.
@@ -15882,10 +22741,10 @@ class basic_json
function which serializes NaN or Infinity to `null`.
@note The following CBOR types are not used in the conversion:
- - byte strings (0x40..0x5F)
- UTF-8 strings terminated by "break" (0x7F)
- arrays terminated by "break" (0x9F)
- maps terminated by "break" (0xBF)
+ - byte strings terminated by "break" (0x5F)
- date/time (0xC0..0xC1)
- bignum (0xC2..0xC3)
- decimal fraction (0xC4)
@@ -15894,11 +22753,11 @@ class basic_json
- expected conversions (0xD5..0xD7)
- simple values (0xE0..0xF3, 0xF8)
- undefined (0xF7)
- - half and single-precision floats (0xF9-0xFA)
+ - half-precision floats (0xF9)
- break (0xFF)
@param[in] j JSON value to serialize
- @return MessagePack serialization as byte vector
+ @return CBOR serialization as byte vector
@complexity Linear in the size of the JSON value @a j.
@@ -15906,13 +22765,14 @@ class basic_json
vector in CBOR format.,to_cbor}
@sa http://cbor.io
- @sa @ref from_cbor(detail::input_adapter, const bool strict) for the
+ @sa @ref from_cbor(detail::input_adapter&&, const bool, const bool) for the
analogous deserialization
@sa @ref to_msgpack(const basic_json&) for the related MessagePack format
@sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
related UBJSON format
- @since version 2.0.9
+ @since version 2.0.9; compact representation of floating-point numbers
+ since version 3.8.0
*/
static std::vector<uint8_t> to_cbor(const basic_json& j)
{
@@ -15972,20 +22832,21 @@ class basic_json
object | *size*: 0..15 | fix map | 0x80..0x8F
object | *size*: 16..65535 | map 16 | 0xDE
object | *size*: 65536..4294967295 | map 32 | 0xDF
+ binary | *size*: 0..255 | bin 8 | 0xC4
+ binary | *size*: 256..65535 | bin 16 | 0xC5
+ binary | *size*: 65536..4294967295 | bin 32 | 0xC6
@note The mapping is **complete** in the sense that any JSON value type
can be converted to a MessagePack value.
@note The following values can **not** be converted to a MessagePack value:
- strings with more than 4294967295 bytes
+ - byte strings with more than 4294967295 bytes
- arrays with more than 4294967295 elements
- objects with more than 4294967295 elements
@note The following MessagePack types are not used in the conversion:
- - bin 8 - bin 32 (0xC4..0xC6)
- - ext 8 - ext 32 (0xC7..0xC9)
- float 32 (0xCA)
- - fixext 1 - fixext 16 (0xD4..0xD8)
@note Any MessagePack output created @ref to_msgpack can be successfully
parsed by @ref from_msgpack.
@@ -16003,8 +22864,7 @@ class basic_json
vector in MessagePack format.,to_msgpack}
@sa http://msgpack.org
- @sa @ref from_msgpack(const std::vector<uint8_t>&, const size_t) for the
- analogous deserialization
+ @sa @ref from_msgpack for the analogous deserialization
@sa @ref to_cbor(const basic_json& for the related CBOR format
@sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
related UBJSON format
@@ -16089,6 +22949,12 @@ class basic_json
the benefit of this parameter is that the receiving side is
immediately informed on the number of elements of the container.
+ @note If the JSON data contains the binary type, the value stored is a list
+ of integers, as suggested by the UBJSON documentation. In particular,
+ this means that serialization and the deserialization of a JSON
+ containing binary values into UBJSON and back will result in a
+ different JSON object.
+
@param[in] j JSON value to serialize
@param[in] use_size whether to add size annotations to container types
@param[in] use_type whether to add type annotations to container types
@@ -16101,7 +22967,7 @@ class basic_json
vector in UBJSON format.,to_ubjson}
@sa http://ubjson.org
- @sa @ref from_ubjson(detail::input_adapter, const bool strict) for the
+ @sa @ref from_ubjson(detail::input_adapter&&, const bool, const bool) for the
analogous deserialization
@sa @ref to_cbor(const basic_json& for the related CBOR format
@sa @ref to_msgpack(const basic_json&) for the related MessagePack format
@@ -16129,6 +22995,92 @@ class basic_json
binary_writer<char>(o).write_ubjson(j, use_size, use_type);
}
+
+ /*!
+ @brief Serializes the given JSON object `j` to BSON and returns a vector
+ containing the corresponding BSON-representation.
+
+ BSON (Binary JSON) is a binary format in which zero or more ordered key/value pairs are
+ stored as a single entity (a so-called document).
+
+ The library uses the following mapping from JSON values types to BSON types:
+
+ JSON value type | value/range | BSON type | marker
+ --------------- | --------------------------------- | ----------- | ------
+ null | `null` | null | 0x0A
+ boolean | `true`, `false` | boolean | 0x08
+ number_integer | -9223372036854775808..-2147483649 | int64 | 0x12
+ number_integer | -2147483648..2147483647 | int32 | 0x10
+ number_integer | 2147483648..9223372036854775807 | int64 | 0x12
+ number_unsigned | 0..2147483647 | int32 | 0x10
+ number_unsigned | 2147483648..9223372036854775807 | int64 | 0x12
+ number_unsigned | 9223372036854775808..18446744073709551615| -- | --
+ number_float | *any value* | double | 0x01
+ string | *any value* | string | 0x02
+ array | *any value* | document | 0x04
+ object | *any value* | document | 0x03
+ binary | *any value* | binary | 0x05
+
+ @warning The mapping is **incomplete**, since only JSON-objects (and things
+ contained therein) can be serialized to BSON.
+ Also, integers larger than 9223372036854775807 cannot be serialized to BSON,
+ and the keys may not contain U+0000, since they are serialized a
+ zero-terminated c-strings.
+
+ @throw out_of_range.407 if `j.is_number_unsigned() && j.get<std::uint64_t>() > 9223372036854775807`
+ @throw out_of_range.409 if a key in `j` contains a NULL (U+0000)
+ @throw type_error.317 if `!j.is_object()`
+
+ @pre The input `j` is required to be an object: `j.is_object() == true`.
+
+ @note Any BSON output created via @ref to_bson can be successfully parsed
+ by @ref from_bson.
+
+ @param[in] j JSON value to serialize
+ @return BSON serialization as byte vector
+
+ @complexity Linear in the size of the JSON value @a j.
+
+ @liveexample{The example shows the serialization of a JSON value to a byte
+ vector in BSON format.,to_bson}
+
+ @sa http://bsonspec.org/spec.html
+ @sa @ref from_bson(detail::input_adapter&&, const bool strict) for the
+ analogous deserialization
+ @sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
+ related UBJSON format
+ @sa @ref to_cbor(const basic_json&) for the related CBOR format
+ @sa @ref to_msgpack(const basic_json&) for the related MessagePack format
+ */
+ static std::vector<uint8_t> to_bson(const basic_json& j)
+ {
+ std::vector<uint8_t> result;
+ to_bson(j, result);
+ return result;
+ }
+
+ /*!
+ @brief Serializes the given JSON object `j` to BSON and forwards the
+ corresponding BSON-representation to the given output_adapter `o`.
+ @param j The JSON object to convert to BSON.
+ @param o The output adapter that receives the binary BSON representation.
+ @pre The input `j` shall be an object: `j.is_object() == true`
+ @sa @ref to_bson(const basic_json&)
+ */
+ static void to_bson(const basic_json& j, detail::output_adapter<uint8_t> o)
+ {
+ binary_writer<uint8_t>(o).write_bson(j);
+ }
+
+ /*!
+ @copydoc to_bson(const basic_json&, detail::output_adapter<uint8_t>)
+ */
+ static void to_bson(const basic_json& j, detail::output_adapter<char> o)
+ {
+ binary_writer<char>(o).write_bson(j);
+ }
+
+
/*!
@brief create a JSON value from an input in CBOR format
@@ -16149,7 +23101,11 @@ class basic_json
Negative integer | number_integer | 0x39
Negative integer | number_integer | 0x3A
Negative integer | number_integer | 0x3B
- Negative integer | number_integer | 0x40..0x57
+ Byte string | binary | 0x40..0x57
+ Byte string | binary | 0x58
+ Byte string | binary | 0x59
+ Byte string | binary | 0x5A
+ Byte string | binary | 0x5B
UTF-8 string | string | 0x60..0x77
UTF-8 string | string | 0x78
UTF-8 string | string | 0x79
@@ -16170,7 +23126,7 @@ class basic_json
map | object | 0xBF
False | `false` | 0xF4
True | `true` | 0xF5
- Nill | `null` | 0xF6
+ Null | `null` | 0xF6
Half-Precision Float | number_float | 0xF9
Single-Precision Float | number_float | 0xFA
Double-Precision Float | number_float | 0xFB
@@ -16178,7 +23134,6 @@ class basic_json
@warning The mapping is **incomplete** in the sense that not all CBOR
types can be converted to a JSON value. The following CBOR types
are not supported and will yield parse errors (parse_error.112):
- - byte strings (0x40..0x5F)
- date/time (0xC0..0xC1)
- bignum (0xC2..0xC3)
- decimal fraction (0xC4)
@@ -16198,7 +23153,12 @@ class basic_json
@param[in] i an input in CBOR format convertible to an input adapter
@param[in] strict whether to expect the input to be consumed until EOF
(true by default)
- @return deserialized JSON value
+ @param[in] allow_exceptions whether to throw exceptions in case of a
+ parse error (optional, true by default)
+
+ @return deserialized JSON value; in case of a parse error and
+ @a allow_exceptions set to `false`, the return value will be
+ value_t::discarded.
@throw parse_error.110 if the given input ends prematurely or the end of
file was not reached when @a strict was set to true
@@ -16213,29 +23173,67 @@ class basic_json
@sa http://cbor.io
@sa @ref to_cbor(const basic_json&) for the analogous serialization
- @sa @ref from_msgpack(detail::input_adapter, const bool) for the
+ @sa @ref from_msgpack(detail::input_adapter&&, const bool, const bool) for the
related MessagePack format
- @sa @ref from_ubjson(detail::input_adapter, const bool) for the related
- UBJSON format
+ @sa @ref from_ubjson(detail::input_adapter&&, const bool, const bool) for the
+ related UBJSON format
@since version 2.0.9; parameter @a start_index since 2.1.1; changed to
consume input adapters, removed start_index parameter, and added
- @a strict parameter since 3.0.0
+ @a strict parameter since 3.0.0; added @a allow_exceptions parameter
+ since 3.2.0
*/
- static basic_json from_cbor(detail::input_adapter i,
- const bool strict = true)
+ template<typename InputType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_cbor(InputType&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
{
- return binary_reader(i).parse_cbor(strict);
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::forward<InputType>(i));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::cbor, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
}
/*!
- @copydoc from_cbor(detail::input_adapter, const bool)
+ @copydoc from_cbor(detail::input_adapter&&, const bool, const bool)
*/
- template<typename A1, typename A2,
- detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
- static basic_json from_cbor(A1 && a1, A2 && a2, const bool strict = true)
+ template<typename IteratorType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_cbor(IteratorType first, IteratorType last,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::move(first), std::move(last));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::cbor, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
+
+ template<typename T>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_cbor(ptr, ptr + len))
+ static basic_json from_cbor(const T* ptr, std::size_t len,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ return from_cbor(ptr, ptr + len, strict, allow_exceptions);
+ }
+
+
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_cbor(ptr, ptr + len))
+ static basic_json from_cbor(detail::span_input_adapter&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
{
- return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_cbor(strict);
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = i.get();
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::cbor, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
}
/*!
@@ -16272,15 +23270,19 @@ class basic_json
array 32 | array | 0xDD
map 16 | object | 0xDE
map 32 | object | 0xDF
+ bin 8 | binary | 0xC4
+ bin 16 | binary | 0xC5
+ bin 32 | binary | 0xC6
+ ext 8 | binary | 0xC7
+ ext 16 | binary | 0xC8
+ ext 32 | binary | 0xC9
+ fixext 1 | binary | 0xD4
+ fixext 2 | binary | 0xD5
+ fixext 4 | binary | 0xD6
+ fixext 8 | binary | 0xD7
+ fixext 16 | binary | 0xD8
negative fixint | number_integer | 0xE0-0xFF
- @warning The mapping is **incomplete** in the sense that not all
- MessagePack types can be converted to a JSON value. The following
- MessagePack types are not supported and will yield parse errors:
- - bin 8 - bin 32 (0xC4..0xC6)
- - ext 8 - ext 32 (0xC7..0xC9)
- - fixext 1 - fixext 16 (0xD4..0xD8)
-
@note Any MessagePack output created @ref to_msgpack can be successfully
parsed by @ref from_msgpack.
@@ -16288,6 +23290,12 @@ class basic_json
adapter
@param[in] strict whether to expect the input to be consumed until EOF
(true by default)
+ @param[in] allow_exceptions whether to throw exceptions in case of a
+ parse error (optional, true by default)
+
+ @return deserialized JSON value; in case of a parse error and
+ @a allow_exceptions set to `false`, the return value will be
+ value_t::discarded.
@throw parse_error.110 if the given input ends prematurely or the end of
file was not reached when @a strict was set to true
@@ -16302,31 +23310,72 @@ class basic_json
@sa http://msgpack.org
@sa @ref to_msgpack(const basic_json&) for the analogous serialization
- @sa @ref from_cbor(detail::input_adapter, const bool) for the related CBOR
- format
- @sa @ref from_ubjson(detail::input_adapter, const bool) for the related
- UBJSON format
+ @sa @ref from_cbor(detail::input_adapter&&, const bool, const bool) for the
+ related CBOR format
+ @sa @ref from_ubjson(detail::input_adapter&&, const bool, const bool) for
+ the related UBJSON format
+ @sa @ref from_bson(detail::input_adapter&&, const bool, const bool) for
+ the related BSON format
@since version 2.0.9; parameter @a start_index since 2.1.1; changed to
consume input adapters, removed start_index parameter, and added
- @a strict parameter since 3.0.0
+ @a strict parameter since 3.0.0; added @a allow_exceptions parameter
+ since 3.2.0
*/
- static basic_json from_msgpack(detail::input_adapter i,
- const bool strict = true)
+ template<typename InputType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_msgpack(InputType&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
{
- return binary_reader(i).parse_msgpack(strict);
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::forward<InputType>(i));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::msgpack, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
}
/*!
- @copydoc from_msgpack(detail::input_adapter, const bool)
+ @copydoc from_msgpack(detail::input_adapter&&, const bool, const bool)
*/
- template<typename A1, typename A2,
- detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
- static basic_json from_msgpack(A1 && a1, A2 && a2, const bool strict = true)
+ template<typename IteratorType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_msgpack(IteratorType first, IteratorType last,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::move(first), std::move(last));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::msgpack, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
+
+
+ template<typename T>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_msgpack(ptr, ptr + len))
+ static basic_json from_msgpack(const T* ptr, std::size_t len,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ return from_msgpack(ptr, ptr + len, strict, allow_exceptions);
+ }
+
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_msgpack(ptr, ptr + len))
+ static basic_json from_msgpack(detail::span_input_adapter&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
{
- return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_msgpack(strict);
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = i.get();
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::msgpack, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
}
+
/*!
@brief create a JSON value from an input in UBJSON format
@@ -16359,6 +23408,12 @@ class basic_json
@param[in] i an input in UBJSON format convertible to an input adapter
@param[in] strict whether to expect the input to be consumed until EOF
(true by default)
+ @param[in] allow_exceptions whether to throw exceptions in case of a
+ parse error (optional, true by default)
+
+ @return deserialized JSON value; in case of a parse error and
+ @a allow_exceptions set to `false`, the return value will be
+ value_t::discarded.
@throw parse_error.110 if the given input ends prematurely or the end of
file was not reached when @a strict was set to true
@@ -16373,26 +23428,179 @@ class basic_json
@sa http://ubjson.org
@sa @ref to_ubjson(const basic_json&, const bool, const bool) for the
analogous serialization
- @sa @ref from_cbor(detail::input_adapter, const bool) for the related CBOR
- format
- @sa @ref from_msgpack(detail::input_adapter, const bool) for the related
- MessagePack format
+ @sa @ref from_cbor(detail::input_adapter&&, const bool, const bool) for the
+ related CBOR format
+ @sa @ref from_msgpack(detail::input_adapter&&, const bool, const bool) for
+ the related MessagePack format
+ @sa @ref from_bson(detail::input_adapter&&, const bool, const bool) for
+ the related BSON format
+
+ @since version 3.1.0; added @a allow_exceptions parameter since 3.2.0
+ */
+ template<typename InputType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_ubjson(InputType&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::forward<InputType>(i));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::ubjson, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
- @since version 3.1.0
+ /*!
+ @copydoc from_ubjson(detail::input_adapter&&, const bool, const bool)
+ */
+ template<typename IteratorType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_ubjson(IteratorType first, IteratorType last,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::move(first), std::move(last));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::ubjson, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
+
+ template<typename T>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_ubjson(ptr, ptr + len))
+ static basic_json from_ubjson(const T* ptr, std::size_t len,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ return from_ubjson(ptr, ptr + len, strict, allow_exceptions);
+ }
+
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_ubjson(ptr, ptr + len))
+ static basic_json from_ubjson(detail::span_input_adapter&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = i.get();
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::ubjson, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
+
+
+ /*!
+ @brief Create a JSON value from an input in BSON format
+
+ Deserializes a given input @a i to a JSON value using the BSON (Binary JSON)
+ serialization format.
+
+ The library maps BSON record types to JSON value types as follows:
+
+ BSON type | BSON marker byte | JSON value type
+ --------------- | ---------------- | ---------------------------
+ double | 0x01 | number_float
+ string | 0x02 | string
+ document | 0x03 | object
+ array | 0x04 | array
+ binary | 0x05 | still unsupported
+ undefined | 0x06 | still unsupported
+ ObjectId | 0x07 | still unsupported
+ boolean | 0x08 | boolean
+ UTC Date-Time | 0x09 | still unsupported
+ null | 0x0A | null
+ Regular Expr. | 0x0B | still unsupported
+ DB Pointer | 0x0C | still unsupported
+ JavaScript Code | 0x0D | still unsupported
+ Symbol | 0x0E | still unsupported
+ JavaScript Code | 0x0F | still unsupported
+ int32 | 0x10 | number_integer
+ Timestamp | 0x11 | still unsupported
+ 128-bit decimal float | 0x13 | still unsupported
+ Max Key | 0x7F | still unsupported
+ Min Key | 0xFF | still unsupported
+
+ @warning The mapping is **incomplete**. The unsupported mappings
+ are indicated in the table above.
+
+ @param[in] i an input in BSON format convertible to an input adapter
+ @param[in] strict whether to expect the input to be consumed until EOF
+ (true by default)
+ @param[in] allow_exceptions whether to throw exceptions in case of a
+ parse error (optional, true by default)
+
+ @return deserialized JSON value; in case of a parse error and
+ @a allow_exceptions set to `false`, the return value will be
+ value_t::discarded.
+
+ @throw parse_error.114 if an unsupported BSON record type is encountered
+
+ @complexity Linear in the size of the input @a i.
+
+ @liveexample{The example shows the deserialization of a byte vector in
+ BSON format to a JSON value.,from_bson}
+
+ @sa http://bsonspec.org/spec.html
+ @sa @ref to_bson(const basic_json&) for the analogous serialization
+ @sa @ref from_cbor(detail::input_adapter&&, const bool, const bool) for the
+ related CBOR format
+ @sa @ref from_msgpack(detail::input_adapter&&, const bool, const bool) for
+ the related MessagePack format
+ @sa @ref from_ubjson(detail::input_adapter&&, const bool, const bool) for the
+ related UBJSON format
+ */
+ template<typename InputType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_bson(InputType&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::forward<InputType>(i));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::bson, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
+
+ /*!
+ @copydoc from_bson(detail::input_adapter&&, const bool, const bool)
*/
- static basic_json from_ubjson(detail::input_adapter i,
- const bool strict = true)
+ template<typename IteratorType>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ static basic_json from_bson(IteratorType first, IteratorType last,
+ const bool strict = true,
+ const bool allow_exceptions = true)
{
- return binary_reader(i).parse_ubjson(strict);
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = detail::input_adapter(std::move(first), std::move(last));
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::bson, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
}
- template<typename A1, typename A2,
- detail::enable_if_t<std::is_constructible<detail::input_adapter, A1, A2>::value, int> = 0>
- static basic_json from_ubjson(A1 && a1, A2 && a2, const bool strict = true)
+ template<typename T>
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_bson(ptr, ptr + len))
+ static basic_json from_bson(const T* ptr, std::size_t len,
+ const bool strict = true,
+ const bool allow_exceptions = true)
{
- return binary_reader(detail::input_adapter(std::forward<A1>(a1), std::forward<A2>(a2))).parse_ubjson(strict);
+ return from_bson(ptr, ptr + len, strict, allow_exceptions);
}
+ JSON_HEDLEY_WARN_UNUSED_RESULT
+ JSON_HEDLEY_DEPRECATED_FOR(3.8.0, from_bson(ptr, ptr + len))
+ static basic_json from_bson(detail::span_input_adapter&& i,
+ const bool strict = true,
+ const bool allow_exceptions = true)
+ {
+ basic_json result;
+ detail::json_sax_dom_parser<basic_json> sdp(result, allow_exceptions);
+ auto ia = i.get();
+ const bool res = binary_reader<decltype(ia)>(std::move(ia)).sax_parse(input_format_t::bson, &sdp, strict);
+ return res ? result : basic_json(value_t::discarded);
+ }
/// @}
//////////////////////////
@@ -16445,7 +23653,7 @@ class basic_json
Uses a JSON pointer to retrieve a reference to the respective JSON value.
No bound checking is performed. The function does not change the JSON
- value; no `null` values are created. In particular, the the special value
+ value; no `null` values are created. In particular, the special value
`-` yields an exception.
@param[in] ptr JSON pointer to the desired element
@@ -16716,63 +23924,59 @@ class basic_json
const auto operation_add = [&result](json_pointer & ptr, basic_json val)
{
// adding to the root of the target document means replacing it
- if (ptr.is_root())
+ if (ptr.empty())
{
result = val;
+ return;
}
- else
+
+ // make sure the top element of the pointer exists
+ json_pointer top_pointer = ptr.top();
+ if (top_pointer != ptr)
+ {
+ result.at(top_pointer);
+ }
+
+ // get reference to parent of JSON pointer ptr
+ const auto last_path = ptr.back();
+ ptr.pop_back();
+ basic_json& parent = result[ptr];
+
+ switch (parent.m_type)
{
- // make sure the top element of the pointer exists
- json_pointer top_pointer = ptr.top();
- if (top_pointer != ptr)
+ case value_t::null:
+ case value_t::object:
{
- result.at(top_pointer);
+ // use operator[] to add value
+ parent[last_path] = val;
+ break;
}
- // get reference to parent of JSON pointer ptr
- const auto last_path = ptr.pop_back();
- basic_json& parent = result[ptr];
-
- switch (parent.m_type)
+ case value_t::array:
{
- case value_t::null:
- case value_t::object:
+ if (last_path == "-")
{
- // use operator[] to add value
- parent[last_path] = val;
- break;
+ // special case: append to back
+ parent.push_back(val);
}
-
- case value_t::array:
+ else
{
- if (last_path == "-")
- {
- // special case: append to back
- parent.push_back(val);
- }
- else
+ const auto idx = json_pointer::array_index(last_path);
+ if (JSON_HEDLEY_UNLIKELY(static_cast<size_type>(idx) > parent.size()))
{
- const auto idx = json_pointer::array_index(last_path);
- if (JSON_UNLIKELY(static_cast<size_type>(idx) > parent.size()))
- {
- // avoid undefined behavior
- JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range"));
- }
- else
- {
- // default case: insert add offset
- parent.insert(parent.begin() + static_cast<difference_type>(idx), val);
- }
+ // avoid undefined behavior
+ JSON_THROW(out_of_range::create(401, "array index " + std::to_string(idx) + " is out of range"));
}
- break;
- }
- default:
- {
- // if there exists a parent it cannot be primitive
- assert(false); // LCOV_EXCL_LINE
+ // default case: insert add offset
+ parent.insert(parent.begin() + static_cast<difference_type>(idx), val);
}
+ break;
}
+
+ // if there exists a parent it cannot be primitive
+ default: // LCOV_EXCL_LINE
+ assert(false); // LCOV_EXCL_LINE
}
};
@@ -16780,7 +23984,8 @@ class basic_json
const auto operation_remove = [&result](json_pointer & ptr)
{
// get reference to parent of JSON pointer ptr
- const auto last_path = ptr.pop_back();
+ const auto last_path = ptr.back();
+ ptr.pop_back();
basic_json& parent = result.at(ptr);
// remove child
@@ -16788,7 +23993,7 @@ class basic_json
{
// perform range check
auto it = parent.find(last_path);
- if (JSON_LIKELY(it != parent.end()))
+ if (JSON_HEDLEY_LIKELY(it != parent.end()))
{
parent.erase(it);
}
@@ -16805,7 +24010,7 @@ class basic_json
};
// type check: top level value must be an array
- if (JSON_UNLIKELY(not json_patch.is_array()))
+ if (JSON_HEDLEY_UNLIKELY(not json_patch.is_array()))
{
JSON_THROW(parse_error::create(104, 0, "JSON patch must be an array of objects"));
}
@@ -16825,13 +24030,13 @@ class basic_json
const auto error_msg = (op == "op") ? "operation" : "operation '" + op + "'";
// check if desired value is present
- if (JSON_UNLIKELY(it == val.m_value.object->end()))
+ if (JSON_HEDLEY_UNLIKELY(it == val.m_value.object->end()))
{
JSON_THROW(parse_error::create(105, 0, error_msg + " must have member '" + member + "'"));
}
// check if result is of type string
- if (JSON_UNLIKELY(string_type and not it->second.is_string()))
+ if (JSON_HEDLEY_UNLIKELY(string_type and not it->second.is_string()))
{
JSON_THROW(parse_error::create(105, 0, error_msg + " must have string member '" + member + "'"));
}
@@ -16841,7 +24046,7 @@ class basic_json
};
// type check: every element of the array must be an object
- if (JSON_UNLIKELY(not val.is_object()))
+ if (JSON_HEDLEY_UNLIKELY(not val.is_object()))
{
JSON_THROW(parse_error::create(104, 0, "JSON patch must be an array of objects"));
}
@@ -16913,13 +24118,13 @@ class basic_json
// the "path" location must exist - use at()
success = (result.at(ptr) == get_value("test", "value", false));
}
- JSON_CATCH (out_of_range&)
+ JSON_INTERNAL_CATCH (out_of_range&)
{
// ignore out of range errors: success remains false
}
// throw an exception if test fails
- if (JSON_UNLIKELY(not success))
+ if (JSON_HEDLEY_UNLIKELY(not success))
{
JSON_THROW(other_error::create(501, "unsuccessful: " + val.dump()));
}
@@ -16927,7 +24132,7 @@ class basic_json
break;
}
- case patch_operations::invalid:
+ default:
{
// op must be "add", "remove", "replace", "move", "copy", or
// "test"
@@ -16972,6 +24177,7 @@ class basic_json
@since version 2.0.0
*/
+ JSON_HEDLEY_WARN_UNUSED_RESULT
static basic_json diff(const basic_json& source, const basic_json& target,
const std::string& path = "")
{
@@ -16991,106 +24197,105 @@ class basic_json
{
{"op", "replace"}, {"path", path}, {"value", target}
});
+ return result;
}
- else
+
+ switch (source.type())
{
- switch (source.type())
+ case value_t::array:
{
- case value_t::array:
+ // first pass: traverse common elements
+ std::size_t i = 0;
+ while (i < source.size() and i < target.size())
{
- // first pass: traverse common elements
- std::size_t i = 0;
- while (i < source.size() and i < target.size())
- {
- // recursive call to compare array values at index i
- auto temp_diff = diff(source[i], target[i], path + "/" + std::to_string(i));
- result.insert(result.end(), temp_diff.begin(), temp_diff.end());
- ++i;
- }
+ // recursive call to compare array values at index i
+ auto temp_diff = diff(source[i], target[i], path + "/" + std::to_string(i));
+ result.insert(result.end(), temp_diff.begin(), temp_diff.end());
+ ++i;
+ }
- // i now reached the end of at least one array
- // in a second pass, traverse the remaining elements
+ // i now reached the end of at least one array
+ // in a second pass, traverse the remaining elements
- // remove my remaining elements
- const auto end_index = static_cast<difference_type>(result.size());
- while (i < source.size())
+ // remove my remaining elements
+ const auto end_index = static_cast<difference_type>(result.size());
+ while (i < source.size())
+ {
+ // add operations in reverse order to avoid invalid
+ // indices
+ result.insert(result.begin() + end_index, object(
{
- // add operations in reverse order to avoid invalid
- // indices
- result.insert(result.begin() + end_index, object(
- {
- {"op", "remove"},
- {"path", path + "/" + std::to_string(i)}
- }));
- ++i;
- }
+ {"op", "remove"},
+ {"path", path + "/" + std::to_string(i)}
+ }));
+ ++i;
+ }
- // add other remaining elements
- while (i < target.size())
+ // add other remaining elements
+ while (i < target.size())
+ {
+ result.push_back(
{
- result.push_back(
- {
- {"op", "add"},
- {"path", path + "/" + std::to_string(i)},
- {"value", target[i]}
- });
- ++i;
- }
-
- break;
+ {"op", "add"},
+ {"path", path + "/-"},
+ {"value", target[i]}
+ });
+ ++i;
}
- case value_t::object:
+ break;
+ }
+
+ case value_t::object:
+ {
+ // first pass: traverse this object's elements
+ for (auto it = source.cbegin(); it != source.cend(); ++it)
{
- // first pass: traverse this object's elements
- for (auto it = source.cbegin(); it != source.cend(); ++it)
- {
- // escape the key name to be used in a JSON patch
- const auto key = json_pointer::escape(it.key());
+ // escape the key name to be used in a JSON patch
+ const auto key = json_pointer::escape(it.key());
- if (target.find(it.key()) != target.end())
- {
- // recursive call to compare object values at key it
- auto temp_diff = diff(it.value(), target[it.key()], path + "/" + key);
- result.insert(result.end(), temp_diff.begin(), temp_diff.end());
- }
- else
- {
- // found a key that is not in o -> remove it
- result.push_back(object(
- {
- {"op", "remove"}, {"path", path + "/" + key}
- }));
- }
+ if (target.find(it.key()) != target.end())
+ {
+ // recursive call to compare object values at key it
+ auto temp_diff = diff(it.value(), target[it.key()], path + "/" + key);
+ result.insert(result.end(), temp_diff.begin(), temp_diff.end());
}
-
- // second pass: traverse other object's elements
- for (auto it = target.cbegin(); it != target.cend(); ++it)
+ else
{
- if (source.find(it.key()) == source.end())
+ // found a key that is not in o -> remove it
+ result.push_back(object(
{
- // found a key that is not in this -> add it
- const auto key = json_pointer::escape(it.key());
- result.push_back(
- {
- {"op", "add"}, {"path", path + "/" + key},
- {"value", it.value()}
- });
- }
+ {"op", "remove"}, {"path", path + "/" + key}
+ }));
}
-
- break;
}
- default:
+ // second pass: traverse other object's elements
+ for (auto it = target.cbegin(); it != target.cend(); ++it)
{
- // both primitive type: replace value
- result.push_back(
+ if (source.find(it.key()) == source.end())
{
- {"op", "replace"}, {"path", path}, {"value", target}
- });
- break;
+ // found a key that is not in this -> add it
+ const auto key = json_pointer::escape(it.key());
+ result.push_back(
+ {
+ {"op", "add"}, {"path", path + "/" + key},
+ {"value", it.value()}
+ });
+ }
}
+
+ break;
+ }
+
+ default:
+ {
+ // both primitive type: replace value
+ result.push_back(
+ {
+ {"op", "replace"}, {"path", path}, {"value", target}
+ });
+ break;
}
}
@@ -17136,7 +24341,7 @@ class basic_json
Thereby, `Target` is the current object; that is, the patch is applied to
the current value.
- @param[in] patch the patch to apply
+ @param[in] apply_patch the patch to apply
@complexity Linear in the lengths of @a patch.
@@ -17148,15 +24353,15 @@ class basic_json
@since version 3.0.0
*/
- void merge_patch(const basic_json& patch)
+ void merge_patch(const basic_json& apply_patch)
{
- if (patch.is_object())
+ if (apply_patch.is_object())
{
if (not is_object())
{
*this = object();
}
- for (auto it = patch.begin(); it != patch.end(); ++it)
+ for (auto it = apply_patch.begin(); it != apply_patch.end(); ++it)
{
if (it.value().is_null())
{
@@ -17170,12 +24375,27 @@ class basic_json
}
else
{
- *this = patch;
+ *this = apply_patch;
}
}
/// @}
};
+
+/*!
+@brief user-defined to_string function for JSON values
+
+This function implements a user-defined to_string for JSON objects.
+
+@param[in] j a JSON object
+@return a std::string object
+*/
+
+NLOHMANN_BASIC_JSON_TPL_DECLARATION
+std::string to_string(const NLOHMANN_BASIC_JSON_TPL& j)
+{
+ return j.dump();
+}
} // namespace nlohmann
///////////////////////
@@ -17185,20 +24405,6 @@ class basic_json
// specialization of std::swap, and std::hash
namespace std
{
-/*!
-@brief exchanges the values of two JSON objects
-
-@since version 1.0.0
-*/
-template<>
-inline void swap(nlohmann::json& j1,
- nlohmann::json& j2) noexcept(
- is_nothrow_move_constructible<nlohmann::json>::value and
- is_nothrow_move_assignable<nlohmann::json>::value
- )
-{
- j1.swap(j2);
-}
/// hash value for JSON objects
template<>
@@ -17221,7 +24427,7 @@ struct hash<nlohmann::json>
/// @note: do not remove the space after '<',
/// see https://github.com/nlohmann/json/pull/679
template<>
-struct less< ::nlohmann::detail::value_t>
+struct less<::nlohmann::detail::value_t>
{
/*!
@brief compare two value_t enum values
@@ -17234,6 +24440,20 @@ struct less< ::nlohmann::detail::value_t>
}
};
+/*!
+@brief exchanges the values of two JSON objects
+
+@since version 1.0.0
+*/
+template<>
+inline void swap<nlohmann::json>(nlohmann::json& j1, nlohmann::json& j2) noexcept(
+ is_nothrow_move_constructible<nlohmann::json>::value and
+ is_nothrow_move_assignable<nlohmann::json>::value
+)
+{
+ j1.swap(j2);
+}
+
} // namespace std
/*!
@@ -17249,6 +24469,7 @@ if no parse error occurred.
@since version 1.0.0
*/
+JSON_HEDLEY_NON_NULL(1)
inline nlohmann::json operator "" _json(const char* s, std::size_t n)
{
return nlohmann::json::parse(s, s + n);
@@ -17267,6 +24488,7 @@ object if no parse error occurred.
@since version 2.0.0
*/
+JSON_HEDLEY_NON_NULL(1)
inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std::size_t n)
{
return nlohmann::json::json_pointer(std::string(s, n));
@@ -17284,17 +24506,160 @@ inline nlohmann::json::json_pointer operator "" _json_pointer(const char* s, std
#endif
// clean up
+#undef JSON_INTERNAL_CATCH
#undef JSON_CATCH
#undef JSON_THROW
#undef JSON_TRY
-#undef JSON_LIKELY
-#undef JSON_UNLIKELY
-#undef JSON_DEPRECATED
#undef JSON_HAS_CPP_14
#undef JSON_HAS_CPP_17
#undef NLOHMANN_BASIC_JSON_TPL_DECLARATION
#undef NLOHMANN_BASIC_JSON_TPL
-#undef NLOHMANN_JSON_HAS_HELPER
-
-#endif
+// #include <nlohmann/thirdparty/hedley/hedley_undef.hpp>
+#undef JSON_HEDLEY_ALWAYS_INLINE
+#undef JSON_HEDLEY_ARM_VERSION
+#undef JSON_HEDLEY_ARM_VERSION_CHECK
+#undef JSON_HEDLEY_ARRAY_PARAM
+#undef JSON_HEDLEY_ASSUME
+#undef JSON_HEDLEY_BEGIN_C_DECLS
+#undef JSON_HEDLEY_CLANG_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_CLANG_HAS_BUILTIN
+#undef JSON_HEDLEY_CLANG_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_CLANG_HAS_DECLSPEC_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_CLANG_HAS_EXTENSION
+#undef JSON_HEDLEY_CLANG_HAS_FEATURE
+#undef JSON_HEDLEY_CLANG_HAS_WARNING
+#undef JSON_HEDLEY_COMPCERT_VERSION
+#undef JSON_HEDLEY_COMPCERT_VERSION_CHECK
+#undef JSON_HEDLEY_CONCAT
+#undef JSON_HEDLEY_CONCAT3
+#undef JSON_HEDLEY_CONCAT3_EX
+#undef JSON_HEDLEY_CONCAT_EX
+#undef JSON_HEDLEY_CONST
+#undef JSON_HEDLEY_CONSTEXPR
+#undef JSON_HEDLEY_CONST_CAST
+#undef JSON_HEDLEY_CPP_CAST
+#undef JSON_HEDLEY_CRAY_VERSION
+#undef JSON_HEDLEY_CRAY_VERSION_CHECK
+#undef JSON_HEDLEY_C_DECL
+#undef JSON_HEDLEY_DEPRECATED
+#undef JSON_HEDLEY_DEPRECATED_FOR
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CAST_QUAL
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_CPP98_COMPAT_WRAP_
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_DEPRECATED
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_CPP_ATTRIBUTES
+#undef JSON_HEDLEY_DIAGNOSTIC_DISABLE_UNKNOWN_PRAGMAS
+#undef JSON_HEDLEY_DIAGNOSTIC_POP
+#undef JSON_HEDLEY_DIAGNOSTIC_PUSH
+#undef JSON_HEDLEY_DMC_VERSION
+#undef JSON_HEDLEY_DMC_VERSION_CHECK
+#undef JSON_HEDLEY_EMPTY_BASES
+#undef JSON_HEDLEY_EMSCRIPTEN_VERSION
+#undef JSON_HEDLEY_EMSCRIPTEN_VERSION_CHECK
+#undef JSON_HEDLEY_END_C_DECLS
+#undef JSON_HEDLEY_FLAGS
+#undef JSON_HEDLEY_FLAGS_CAST
+#undef JSON_HEDLEY_GCC_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_GCC_HAS_BUILTIN
+#undef JSON_HEDLEY_GCC_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_GCC_HAS_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_GCC_HAS_EXTENSION
+#undef JSON_HEDLEY_GCC_HAS_FEATURE
+#undef JSON_HEDLEY_GCC_HAS_WARNING
+#undef JSON_HEDLEY_GCC_NOT_CLANG_VERSION_CHECK
+#undef JSON_HEDLEY_GCC_VERSION
+#undef JSON_HEDLEY_GCC_VERSION_CHECK
+#undef JSON_HEDLEY_GNUC_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_GNUC_HAS_BUILTIN
+#undef JSON_HEDLEY_GNUC_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_GNUC_HAS_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_GNUC_HAS_EXTENSION
+#undef JSON_HEDLEY_GNUC_HAS_FEATURE
+#undef JSON_HEDLEY_GNUC_HAS_WARNING
+#undef JSON_HEDLEY_GNUC_VERSION
+#undef JSON_HEDLEY_GNUC_VERSION_CHECK
+#undef JSON_HEDLEY_HAS_ATTRIBUTE
+#undef JSON_HEDLEY_HAS_BUILTIN
+#undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE
+#undef JSON_HEDLEY_HAS_CPP_ATTRIBUTE_NS
+#undef JSON_HEDLEY_HAS_DECLSPEC_ATTRIBUTE
+#undef JSON_HEDLEY_HAS_EXTENSION
+#undef JSON_HEDLEY_HAS_FEATURE
+#undef JSON_HEDLEY_HAS_WARNING
+#undef JSON_HEDLEY_IAR_VERSION
+#undef JSON_HEDLEY_IAR_VERSION_CHECK
+#undef JSON_HEDLEY_IBM_VERSION
+#undef JSON_HEDLEY_IBM_VERSION_CHECK
+#undef JSON_HEDLEY_IMPORT
+#undef JSON_HEDLEY_INLINE
+#undef JSON_HEDLEY_INTEL_VERSION
+#undef JSON_HEDLEY_INTEL_VERSION_CHECK
+#undef JSON_HEDLEY_IS_CONSTANT
+#undef JSON_HEDLEY_IS_CONSTEXPR_
+#undef JSON_HEDLEY_LIKELY
+#undef JSON_HEDLEY_MALLOC
+#undef JSON_HEDLEY_MESSAGE
+#undef JSON_HEDLEY_MSVC_VERSION
+#undef JSON_HEDLEY_MSVC_VERSION_CHECK
+#undef JSON_HEDLEY_NEVER_INLINE
+#undef JSON_HEDLEY_NON_NULL
+#undef JSON_HEDLEY_NO_ESCAPE
+#undef JSON_HEDLEY_NO_RETURN
+#undef JSON_HEDLEY_NO_THROW
+#undef JSON_HEDLEY_NULL
+#undef JSON_HEDLEY_PELLES_VERSION
+#undef JSON_HEDLEY_PELLES_VERSION_CHECK
+#undef JSON_HEDLEY_PGI_VERSION
+#undef JSON_HEDLEY_PGI_VERSION_CHECK
+#undef JSON_HEDLEY_PREDICT
+#undef JSON_HEDLEY_PRINTF_FORMAT
+#undef JSON_HEDLEY_PRIVATE
+#undef JSON_HEDLEY_PUBLIC
+#undef JSON_HEDLEY_PURE
+#undef JSON_HEDLEY_REINTERPRET_CAST
+#undef JSON_HEDLEY_REQUIRE
+#undef JSON_HEDLEY_REQUIRE_CONSTEXPR
+#undef JSON_HEDLEY_REQUIRE_MSG
+#undef JSON_HEDLEY_RESTRICT
+#undef JSON_HEDLEY_RETURNS_NON_NULL
+#undef JSON_HEDLEY_SENTINEL
+#undef JSON_HEDLEY_STATIC_ASSERT
+#undef JSON_HEDLEY_STATIC_CAST
+#undef JSON_HEDLEY_STRINGIFY
+#undef JSON_HEDLEY_STRINGIFY_EX
+#undef JSON_HEDLEY_SUNPRO_VERSION
+#undef JSON_HEDLEY_SUNPRO_VERSION_CHECK
+#undef JSON_HEDLEY_TINYC_VERSION
+#undef JSON_HEDLEY_TINYC_VERSION_CHECK
+#undef JSON_HEDLEY_TI_ARMCL_VERSION
+#undef JSON_HEDLEY_TI_ARMCL_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL2000_VERSION
+#undef JSON_HEDLEY_TI_CL2000_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL430_VERSION
+#undef JSON_HEDLEY_TI_CL430_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL6X_VERSION
+#undef JSON_HEDLEY_TI_CL6X_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CL7X_VERSION
+#undef JSON_HEDLEY_TI_CL7X_VERSION_CHECK
+#undef JSON_HEDLEY_TI_CLPRU_VERSION
+#undef JSON_HEDLEY_TI_CLPRU_VERSION_CHECK
+#undef JSON_HEDLEY_TI_VERSION
+#undef JSON_HEDLEY_TI_VERSION_CHECK
+#undef JSON_HEDLEY_UNAVAILABLE
+#undef JSON_HEDLEY_UNLIKELY
+#undef JSON_HEDLEY_UNPREDICTABLE
+#undef JSON_HEDLEY_UNREACHABLE
+#undef JSON_HEDLEY_UNREACHABLE_RETURN
+#undef JSON_HEDLEY_VERSION
+#undef JSON_HEDLEY_VERSION_DECODE_MAJOR
+#undef JSON_HEDLEY_VERSION_DECODE_MINOR
+#undef JSON_HEDLEY_VERSION_DECODE_REVISION
+#undef JSON_HEDLEY_VERSION_ENCODE
+#undef JSON_HEDLEY_WARNING
+#undef JSON_HEDLEY_WARN_UNUSED_RESULT
+#undef JSON_HEDLEY_WARN_UNUSED_RESULT_MSG
+#undef JSON_HEDLEY_FALL_THROUGH
+
+
+
+#endif // INCLUDE_NLOHMANN_JSON_HPP_
--
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