37 lines
982 B
C
37 lines
982 B
C
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/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This implementation is borrowed from Chromium.
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#ifndef RTC_BASE_CONTAINERS_IDENTITY_H_
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#define RTC_BASE_CONTAINERS_IDENTITY_H_
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#include <utility>
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namespace webrtc {
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// Implementation of C++20's std::identity.
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//
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// Reference:
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// - https://en.cppreference.com/w/cpp/utility/functional/identity
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// - https://wg21.link/func.identity
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struct identity {
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template <typename T>
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constexpr T&& operator()(T&& t) const noexcept {
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return std::forward<T>(t);
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}
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using is_transparent = void;
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};
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} // namespace webrtc
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#endif // RTC_BASE_CONTAINERS_IDENTITY_H_
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