6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
37 lines
982 B
C++
37 lines
982 B
C++
//===- llvm/ADT/Identity.h - Provide std::identity from C++20 ---*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides an implementation of std::identity from C++20.
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//
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// No library is required when using these functions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_IDENTITY_H
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#define LLVM_ADT_IDENTITY_H
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namespace llvm {
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// Similar to `std::identity` from C++20.
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template <class Ty> struct identity {
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using is_transparent = void;
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using argument_type = Ty;
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Ty &operator()(Ty &self) const {
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return self;
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}
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const Ty &operator()(const Ty &self) const {
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return self;
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}
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};
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} // end namespace llvm
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#endif // LLVM_ADT_IDENTITY_H
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