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// 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 SRC_DAWN_COMMON_TYPETRAITS_H_
#define SRC_DAWN_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;
};
template <typename T>
struct IsCString {
static constexpr bool Eval() {
using Tp = std::decay_t<T>;
if (!std::is_pointer_v<Tp>) {
return false;
}
return std::is_same_v<std::remove_cv_t<std::remove_pointer_t<Tp>>, char>;
}
static constexpr const bool value = Eval();
};
#endif // SRC_DAWN_COMMON_TYPETRAITS_H_