derek.holloway
7502bf64a4
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84 lines
3.7 KiB
C++
84 lines
3.7 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCUDACXX___FUNCTIONAL_BIND_BACK_H
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#define _LIBCUDACXX___FUNCTIONAL_BIND_BACK_H
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#include <cuda/std/detail/__config>
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#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
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# pragma GCC system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
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# pragma clang system_header
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#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
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# pragma system_header
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#endif // no system header
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#include <cuda/std/__functional/invoke.h>
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#include <cuda/std/__functional/perfect_forward.h>
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#include <cuda/std/__fwd/get.h>
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#include <cuda/std/__tuple_dir/tuple_size.h>
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#include <cuda/std/__type_traits/decay.h>
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#include <cuda/std/__type_traits/enable_if.h>
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#include <cuda/std/__type_traits/is_constructible.h>
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#include <cuda/std/__type_traits/is_move_constructible.h>
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#include <cuda/std/__utility/forward.h>
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#include <cuda/std/__utility/integer_sequence.h>
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#include <cuda/std/tuple>
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_LIBCUDACXX_BEGIN_NAMESPACE_STD
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template <size_t _NBound, class = make_index_sequence<_NBound>>
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struct __bind_back_op;
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template <size_t _NBound, size_t... _Ip>
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struct __bind_back_op<_NBound, index_sequence<_Ip...>>
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{
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template <class _Fn, class _BoundArgs, class... _Args>
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_LIBCUDACXX_HIDE_FROM_ABI constexpr auto operator()(_Fn&& __f, _BoundArgs&& __bound_args, _Args&&... __args) const
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noexcept(noexcept(_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Fn>(__f),
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_CUDA_VSTD::forward<_Args>(__args)...,
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_CUDA_VSTD::get<_Ip>(_CUDA_VSTD::forward<_BoundArgs>(__bound_args))...)))
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-> decltype(_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Fn>(__f),
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_CUDA_VSTD::forward<_Args>(__args)...,
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_CUDA_VSTD::get<_Ip>(_CUDA_VSTD::forward<_BoundArgs>(__bound_args))...))
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{
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return _CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Fn>(__f),
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_CUDA_VSTD::forward<_Args>(__args)...,
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_CUDA_VSTD::get<_Ip>(_CUDA_VSTD::forward<_BoundArgs>(__bound_args))...);
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}
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};
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template <class _Fn, class _BoundArgs>
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struct __bind_back_t : __perfect_forward<__bind_back_op<tuple_size_v<_BoundArgs>>, _Fn, _BoundArgs>
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{
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using __perfect_forward<__bind_back_op<tuple_size_v<_BoundArgs>>, _Fn, _BoundArgs>::__perfect_forward;
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};
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template <class _Fn,
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class... _Args,
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class = enable_if_t<_And<is_constructible<decay_t<_Fn>, _Fn>,
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is_move_constructible<decay_t<_Fn>>,
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is_constructible<decay_t<_Args>, _Args>...,
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is_move_constructible<decay_t<_Args>>...>::value>>
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_LIBCUDACXX_HIDE_FROM_ABI constexpr auto
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__bind_back(_Fn&& __f, _Args&&... __args) noexcept(noexcept(__bind_back_t<decay_t<_Fn>, tuple<decay_t<_Args>...>>(
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_CUDA_VSTD::forward<_Fn>(__f), _CUDA_VSTD::forward_as_tuple(_CUDA_VSTD::forward<_Args>(__args)...))))
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-> decltype(__bind_back_t<decay_t<_Fn>, tuple<decay_t<_Args>...>>(
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_CUDA_VSTD::forward<_Fn>(__f), _CUDA_VSTD::forward_as_tuple(_CUDA_VSTD::forward<_Args>(__args)...)))
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{
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return __bind_back_t<decay_t<_Fn>, tuple<decay_t<_Args>...>>(
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_CUDA_VSTD::forward<_Fn>(__f), _CUDA_VSTD::forward_as_tuple(_CUDA_VSTD::forward<_Args>(__args)...));
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}
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_LIBCUDACXX_END_NAMESPACE_STD
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#endif // _LIBCUDACXX___FUNCTIONAL_BIND_BACK_H
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