| // Copyright 2020 The Dawn Authors |
| // |
| // 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 COMMON_TYPETRAITS_H_ |
| #define COMMON_TYPETRAITS_H_ |
| |
| #include <type_traits> |
| |
| template <typename LHS, typename RHS = LHS, typename T = void> |
| struct HasEqualityOperator { |
| static constexpr const bool value = false; |
| }; |
| |
| template <typename LHS, typename RHS> |
| struct HasEqualityOperator< |
| LHS, |
| RHS, |
| std::enable_if_t< |
| std::is_same<decltype(std::declval<LHS>() == std::declval<RHS>()), bool>::value>> { |
| static constexpr const bool value = true; |
| }; |
| |
| #endif // COMMON_TYPE_TRAITS_H_ |
