blob: 4e254e0fa0e875946d13b0f6babcf5c63a81d402 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
// -*- 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
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___UTILITY_FORWARD_H
#define _LIBCPP___UTILITY_FORWARD_H
#include <__config>
#include <__type_traits/is_reference.h>
#include <__type_traits/remove_reference.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Tp>
_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR _Tp&&
forward(__libcpp_remove_reference_t<_Tp>& __t) _NOEXCEPT {
return static_cast<_Tp&&>(__t);
}
template <class _Tp>
_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR _Tp&&
forward(__libcpp_remove_reference_t<_Tp>&& __t) _NOEXCEPT {
static_assert(!is_lvalue_reference<_Tp>::value, "cannot forward an rvalue as an lvalue");
return static_cast<_Tp&&>(__t);
}
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___UTILITY_FORWARD_H
|
