| // Copyright 2021 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_AS_CONST_H_ |
| #define BASE_AS_CONST_H_ |
| |
| #include <type_traits> |
| |
| namespace base { |
| |
| // C++14 implementation of C++17's std::as_const(): |
| // https://en.cppreference.com/w/cpp/utility/as_const |
| template <typename T> |
| constexpr std::add_const_t<T>& as_const(T& t) noexcept { |
| return t; |
| } |
| |
| template <typename T> |
| void as_const(const T&& t) = delete; |
| |
| } // namespace base |
| |
| #endif // BASE_AS_CONST_H_ |
