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#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- llvm/ADT/Identity.h - Provide std::identity from C++20 ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file provides an implementation of std::identity from C++20.
//
// No library is required when using these functions.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ADT_IDENTITY_H
#define LLVM_ADT_IDENTITY_H
namespace llvm {
// Similar to `std::identity` from C++20.
template <class Ty> struct identity {
using is_transparent = void;
using argument_type = Ty;
Ty &operator()(Ty &self) const {
return self;
}
const Ty &operator()(const Ty &self) const {
return self;
}
};
} // end namespace llvm
#endif // LLVM_ADT_IDENTITY_H
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
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