diff options
Diffstat (limited to 'source/blender/functions/FN_field_cpp_type.hh')
-rw-r--r-- | source/blender/functions/FN_field_cpp_type.hh | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/source/blender/functions/FN_field_cpp_type.hh b/source/blender/functions/FN_field_cpp_type.hh new file mode 100644 index 00000000000..5e6f1b5a585 --- /dev/null +++ b/source/blender/functions/FN_field_cpp_type.hh @@ -0,0 +1,72 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#pragma once + +/** \file + * \ingroup fn + */ + +#include "FN_cpp_type_make.hh" +#include "FN_field.hh" + +namespace blender::fn { + +template<typename T> struct FieldCPPTypeParam { +}; + +class FieldCPPType : public CPPType { + private: + const CPPType &field_type_; + + public: + template<typename T> + FieldCPPType(FieldCPPTypeParam<Field<T>> /* unused */, StringRef debug_name) + : CPPType(CPPTypeParam<Field<T>, CPPTypeFlags::None>(), debug_name), + field_type_(CPPType::get<T>()) + { + } + + const CPPType &field_type() const + { + return field_type_; + } + + /* Ensure that #GField and #Field<T> have the same layout, to enable casting between the two. */ + static_assert(sizeof(Field<int>) == sizeof(GField)); + static_assert(sizeof(Field<int>) == sizeof(Field<std::string>)); + + const GField &get_gfield(const void *field) const + { + return *(const GField *)field; + } + + void construct_from_gfield(void *r_value, const GField &gfield) const + { + new (r_value) GField(gfield); + } +}; + +} // namespace blender::fn + +#define MAKE_FIELD_CPP_TYPE(DEBUG_NAME, FIELD_TYPE) \ + template<> \ + const blender::fn::CPPType &blender::fn::CPPType::get_impl<blender::fn::Field<FIELD_TYPE>>() \ + { \ + static blender::fn::FieldCPPType cpp_type{ \ + blender::fn::FieldCPPTypeParam<blender::fn::Field<FIELD_TYPE>>(), STRINGIFY(DEBUG_NAME)}; \ + return cpp_type; \ + } |