Program Listing for File type_traits.hpp
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// Copyright 2022 Open Source Robotics Foundation, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ROSIDL_TYPESUPPORT_INTROSPECTION_TESTS__TYPE_TRAITS_HPP_
#define ROSIDL_TYPESUPPORT_INTROSPECTION_TESTS__TYPE_TRAITS_HPP_
#include <type_traits>
#define EXPRESSION_TYPE(expression) \
typename std::remove_cv< \
typename std::remove_reference< \
decltype(expression)>::type>::type
#define MEMBER_EXPRESSION(type, expression) \
std::declval<type>().expression
#define MEMBER_EXPRESSION_TYPE(type, expression) \
EXPRESSION_TYPE(MEMBER_EXPRESSION(type, expression))
#define MEMBER_ITEM_TYPE(type, member) \
EXPRESSION_TYPE(getitem(MEMBER_EXPRESSION(type, member), 0));
#define DEFINE_HAS_MEMBER_TRAIT(member_name) \
template<class T, typename = int> \
struct has_ ## member_name : public std::false_type {}; \
template<class T> \
struct has_ ## member_name< \
T, decltype((void) T::member_name, 0) \
>: public std::true_type {}
namespace rosidl_typesupport_introspection_tests
{
// Base definition, to be specialized
template<typename InterfaceT>
struct interface_traits;
// Base definition, to be specialized
template<typename InterfaceT>
struct introspection_traits;
} // namespace rosidl_typesupport_introspection_tests
#endif // ROSIDL_TYPESUPPORT_INTROSPECTION_TESTS__TYPE_TRAITS_HPP_