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501e3f2 | 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 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | // -*- 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___FUNCTIONAL_PERFECT_FORWARD_H
#define _LIBCUDACXX___FUNCTIONAL_PERFECT_FORWARD_H
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__concepts/__concept_macros.h"
#include "../__functional/invoke.h"
#include "../__type_traits/enable_if.h"
#include "../__type_traits/is_constructible.h"
#include "../__type_traits/is_nothrow_constructible.h"
#include "../__utility/declval.h"
#include "../__utility/forward.h"
#include "../__utility/integer_sequence.h"
#include "../__utility/move.h"
#include "../tuple"
#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
_LIBCUDACXX_BEGIN_NAMESPACE_STD
#if _LIBCUDACXX_STD_VER > 14
template <class _Op, class _Indices, class... _BoundArgs>
struct __perfect_forward_impl;
template <class _Op, size_t... _Idx, class... _BoundArgs>
struct __perfect_forward_impl<_Op, index_sequence<_Idx...>, _BoundArgs...> {
private:
tuple<_BoundArgs...> __bound_args_;
public:
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( is_constructible_v<tuple<_BoundArgs...>, _Args&&...>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY
explicit constexpr __perfect_forward_impl(_Args&&... __bound_args)
noexcept(is_nothrow_constructible_v<tuple<_BoundArgs...>, _Args&&...>)
: __bound_args_(_CUDA_VSTD::forward<_Args>(__bound_args)...) {}
__perfect_forward_impl(__perfect_forward_impl const&) = default;
__perfect_forward_impl(__perfect_forward_impl&&) = default;
__perfect_forward_impl& operator=(__perfect_forward_impl const&) = default;
__perfect_forward_impl& operator=(__perfect_forward_impl&&) = default;
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( is_invocable_v<_Op, _BoundArgs&..., _Args...>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr auto operator()(_Args&&... __args) &
noexcept(noexcept(_Op()(_CUDA_VSTD::get<_Idx>(__bound_args_)..., _CUDA_VSTD::forward<_Args>(__args)...)))
-> decltype( _Op()(_CUDA_VSTD::get<_Idx>(__bound_args_)..., _CUDA_VSTD::forward<_Args>(__args)...))
{ return _Op()(_CUDA_VSTD::get<_Idx>(__bound_args_)..., _CUDA_VSTD::forward<_Args>(__args)...); }
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( (!is_invocable_v<_Op, _BoundArgs&..., _Args...>))
_LIBCUDACXX_INLINE_VISIBILITY auto operator()(_Args&&...) & = delete;
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( is_invocable_v<_Op, _BoundArgs const&..., _Args...>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr auto operator()(_Args&&... __args) const&
noexcept(noexcept(_Op()(_CUDA_VSTD::get<_Idx>(__bound_args_)..., _CUDA_VSTD::forward<_Args>(__args)...)))
-> decltype( _Op()(_CUDA_VSTD::get<_Idx>(__bound_args_)..., _CUDA_VSTD::forward<_Args>(__args)...))
{ return _Op()(_CUDA_VSTD::get<_Idx>(__bound_args_)..., _CUDA_VSTD::forward<_Args>(__args)...); }
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( (!is_invocable_v<_Op, _BoundArgs const&..., _Args...>))
_LIBCUDACXX_INLINE_VISIBILITY auto operator()(_Args&&...) const& = delete;
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( is_invocable_v<_Op, _BoundArgs..., _Args...>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr auto operator()(_Args&&... __args) &&
noexcept(noexcept(_Op()(_CUDA_VSTD::get<_Idx>(_CUDA_VSTD::move(__bound_args_))..., _CUDA_VSTD::forward<_Args>(__args)...)))
-> decltype( _Op()(_CUDA_VSTD::get<_Idx>(_CUDA_VSTD::move(__bound_args_))..., _CUDA_VSTD::forward<_Args>(__args)...))
{ return _Op()(_CUDA_VSTD::get<_Idx>(_CUDA_VSTD::move(__bound_args_))..., _CUDA_VSTD::forward<_Args>(__args)...); }
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( (!is_invocable_v<_Op, _BoundArgs..., _Args...>))
_LIBCUDACXX_INLINE_VISIBILITY auto operator()(_Args&&...) && = delete;
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( is_invocable_v<_Op, _BoundArgs const..., _Args...>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr auto operator()(_Args&&... __args) const&&
noexcept(noexcept(_Op()(_CUDA_VSTD::get<_Idx>(_CUDA_VSTD::move(__bound_args_))..., _CUDA_VSTD::forward<_Args>(__args)...)))
-> decltype( _Op()(_CUDA_VSTD::get<_Idx>(_CUDA_VSTD::move(__bound_args_))..., _CUDA_VSTD::forward<_Args>(__args)...))
{ return _Op()(_CUDA_VSTD::get<_Idx>(_CUDA_VSTD::move(__bound_args_))..., _CUDA_VSTD::forward<_Args>(__args)...); }
_LIBCUDACXX_TEMPLATE(class... _Args)
_LIBCUDACXX_REQUIRES( (!is_invocable_v<_Op, _BoundArgs const..., _Args...>))
_LIBCUDACXX_INLINE_VISIBILITY auto operator()(_Args&&...) const&& = delete;
};
// __perfect_forward implements a perfect-forwarding call wrapper as explained in [func.require].
template <class _Op, class ..._Args>
using __perfect_forward = __perfect_forward_impl<_Op, index_sequence_for<_Args...>, _Args...>;
#endif // _LIBCUDACXX_STD_VER > 14
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___FUNCTIONAL_PERFECT_FORWARD_H
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