1//===-- forward utility -----------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8#ifndef LLVM_LIBC_SRC___SUPPORT_CPP_UTILITY_FORWARD_H
9#define LLVM_LIBC_SRC___SUPPORT_CPP_UTILITY_FORWARD_H
10
11#include "src/__support/CPP/type_traits/is_lvalue_reference.h"
12#include "src/__support/CPP/type_traits/remove_reference.h"
13#include "src/__support/macros/attributes.h"
14
15namespace LIBC_NAMESPACE::cpp {
16
17// forward
18template <typename T>
19LIBC_INLINE constexpr T &&forward(remove_reference_t<T> &value) {
20 return static_cast<T &&>(value);
21}
22
23template <typename T>
24LIBC_INLINE constexpr T &&forward(remove_reference_t<T> &&value) {
25 static_assert(!is_lvalue_reference_v<T>,
26 "cannot forward an rvalue as an lvalue");
27 return static_cast<T &&>(value);
28}
29
30} // namespace LIBC_NAMESPACE::cpp
31
32#endif // LLVM_LIBC_SRC___SUPPORT_CPP_UTILITY_FORWARD_H
33

source code of libc/src/__support/CPP/utility/forward.h