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- // 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_
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