blob: 535e7f8ce1d48bb8a32f589f14511e649c5ebe06 (
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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
// -*- 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
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___UTILITY_FORWARD_H
#define _LIBCUDACXX___UTILITY_FORWARD_H
#include <cuda/std/detail/__config>
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
#include <cuda/std/__type_traits/is_reference.h>
#include <cuda/std/__type_traits/remove_reference.h>
#include <cuda/std/cstddef>
#include <cuda/std/__cccl/prologue.h>
_LIBCUDACXX_BEGIN_NAMESPACE_STD
#if _CCCL_HAS_BUILTIN_STD_FORWARD()
// The compiler treats ::std::forward_like as a builtin function so it does not need to be
// instantiated and will be compiled away even at -O0.
using ::std::forward;
#else // ^^^ _CCCL_HAS_BUILTIN_STD_FORWARD() ^^^ / vvv !_CCCL_HAS_BUILTIN_STD_FORWARD() vvv
template <class _Tp>
[[nodiscard]] _CCCL_INTRINSIC _CCCL_API constexpr _Tp&& forward(remove_reference_t<_Tp>& __t) noexcept
{
return static_cast<_Tp&&>(__t);
}
template <class _Tp>
[[nodiscard]] _CCCL_INTRINSIC _CCCL_API constexpr _Tp&& forward(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);
}
#endif // _CCCL_HAS_BUILTIN_STD_FORWARD()
_LIBCUDACXX_END_NAMESPACE_STD
#include <cuda/std/__cccl/epilogue.h>
#endif // _LIBCUDACXX___UTILITY_FORWARD_H
|
