pystencils: re-allow use of arbitrary field names in sweeps

Previously, anything that wasn’t velocity, src, src_tmp, pdfs, pdfs_tmp resulted in invalid code

This was a regression introduced in a1614152

python/pystencils_walberla/jinja_filters.py

@@ -170,8 +170,8 @@ def generate_block_data_to_field_extraction(ctx, kernel_info, parameters_to_igno
     return result
 
 
-def generate_refs_for_kernel_parameters(kernel_info, prefix, parameters_to_ignore):
-    symbols = {p.field_name for p in kernel_info.parameters if p.is_field_pointer}
+def generate_refs_for_kernel_parameters(kernel_info, prefix, parameters_to_ignore=(), ignore_fields=False):
+    symbols = {p.field_name for p in kernel_info.parameters if p.is_field_pointer and not ignore_fields}
     symbols.update(p.symbol.name for p in kernel_info.parameters if not p.is_field_parameter)
     symbols.difference_update(parameters_to_ignore)
     return "\n".join("auto & %s = %s%s_;" % (s, prefix, s) for s in symbols)

python/pystencils_walberla/templates/Sweep.tmpl.cpp

@@ -58,7 +58,7 @@ namespace {{namespace}} {
 void {{class_name}}::operator()( IBlock * block{%if target is equalto 'gpu'%} , cudaStream_t stream{% endif %} )
 {
     {{kernel|generate_block_data_to_field_extraction|indent(4)}}
-    {{kernel|generate_refs_for_kernel_parameters(prefix='this->', parameters_to_ignore=['velocity', 'src', 'src_tmp', 'pdfs', 'pdfs_tmp'])|indent(4) }}
+    {{kernel|generate_refs_for_kernel_parameters(prefix='this->', ignore_fields=True)|indent(4) }}
     {{kernel|generate_call(stream='stream')|indent(4)}}
     {{kernel|generate_swaps|indent(4)}}
 }
@@ -78,7 +78,7 @@ void {{class_name}}::runOnCellInterval( const shared_ptr<StructuredBlockStorage>
         return;
 
     {{kernel|generate_block_data_to_field_extraction|indent(4)}}
-    {{kernel|generate_refs_for_kernel_parameters(prefix='this->', parameters_to_ignore=['velocity', 'src', 'src_tmp', 'pdfs', 'pdfs_tmp'])|indent(4) }}
+    {{kernel|generate_refs_for_kernel_parameters(prefix='this->', ignore_fields=True)|indent(4) }}
     {{kernel|generate_call(stream='stream', cell_interval='ci')|indent(4)}}
     {{kernel|generate_swaps|indent(4)}}
 }