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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_CXX20_TO_ADDRESS_H_
- #define BASE_CXX20_TO_ADDRESS_H_
- #include <type_traits>
- namespace base {
- // Simplified C++14 implementation of C++20's std::to_address.
- // Note: This does not consider specializations of pointer_traits<>::to_address,
- // since that member function may only be present in C++20 and later.
- //
- // Reference: https://wg21.link/pointer.conversion#lib:to_address
- template <typename T>
- constexpr T* to_address(T* p) noexcept {
- static_assert(!std::is_function<T>::value,
- "Error: T must not be a function type.");
- return p;
- }
- template <typename Ptr>
- constexpr auto to_address(const Ptr& p) noexcept {
- return to_address(p.operator->());
- }
- } // namespace base
- #endif // BASE_CXX20_TO_ADDRESS_H_
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