From b87eeadfa71011e33fc465bc938fdcac6f66f576 Mon Sep 17 00:00:00 2001
From: Stephan Seitz <stephan.seitz@fau.de>
Date: Sun, 18 Aug 2019 14:37:15 +0200
Subject: [PATCH] Fix get_type_of_expression for constants like sympy.pi
Problem some constant expressions are neither Float,Integer,Rational but
don't have arguments.
>>> isinstance(pi, Integer)
False
>>> isinstance(pi, Float)
False
>>> isinstance(pi, Rational)
False
>>> pi.args
()
---
pystencils/data_types.py | 17 ++++++++++++-----
pystencils_tests/test_types.py | 15 +++++++++++++++
2 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/pystencils/data_types.py b/pystencils/data_types.py
index 23dcf4f..86ce174 100644
--- a/pystencils/data_types.py
+++ b/pystencils/data_types.py
@@ -378,15 +378,15 @@ def collate_types(types):
@memorycache(maxsize=2048)
-def get_type_of_expression(expr):
+def get_type_of_expression(expr, default_float_type='double', default_int_type='int'):
from pystencils.astnodes import ResolvedFieldAccess
from pystencils.cpu.vectorization import vec_all, vec_any
expr = sp.sympify(expr)
if isinstance(expr, sp.Integer):
- return create_type("int")
+ return create_type(default_int_type)
elif isinstance(expr, sp.Rational) or isinstance(expr, sp.Float):
- return create_type("double")
+ return create_type(default_float_type)
elif isinstance(expr, ResolvedFieldAccess):
return expr.field.dtype
elif isinstance(expr, TypedSymbol):
@@ -416,8 +416,15 @@ def get_type_of_expression(expr):
elif isinstance(expr, sp.Pow):
return get_type_of_expression(expr.args[0])
elif isinstance(expr, sp.Expr):
- types = tuple(get_type_of_expression(a) for a in expr.args)
- return collate_types(types)
+ expr: sp.Expr
+ if expr.args:
+ types = tuple(get_type_of_expression(a) for a in expr.args)
+ return collate_types(types)
+ else:
+ if expr.is_integer:
+ return create_type(default_int_type)
+ else:
+ return create_type(default_float_type)
raise NotImplementedError("Could not determine type for", expr, type(expr))
diff --git a/pystencils_tests/test_types.py b/pystencils_tests/test_types.py
index 4b28c5a..887f802 100644
--- a/pystencils_tests/test_types.py
+++ b/pystencils_tests/test_types.py
@@ -1,5 +1,7 @@
from pystencils import data_types
from pystencils.data_types import *
+import sympy as sp
+
def test_parsing():
@@ -19,3 +21,16 @@ def test_collation():
assert collate_types([double_type, float_type]) == double_type
assert collate_types([double4_type, float_type]) == double4_type
assert collate_types([double4_type, float4_type]) == double4_type
+
+def test_dtype_of_constants():
+
+ # Some come constants are neither of type Integer,Float,Rational and don't have args
+ # >>> isinstance(pi, Integer)
+ # False
+ # >>> isinstance(pi, Float)
+ # False
+ # >>> isinstance(pi, Rational)
+ # False
+ # >>> pi.args
+ # ()
+ get_type_of_expression(sp.pi)
--
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