derek.holloway
7502bf64a4
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77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
//===----------------------------------------------------------------------===//
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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___CONCEPTS_INVOCABLE_H
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#define _LIBCUDACXX___CONCEPTS_INVOCABLE_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/__concepts/concept_macros.h>
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#include <cuda/std/__functional/invoke.h>
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#include <cuda/std/__type_traits/remove_cvref.h>
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#include <cuda/std/__utility/forward.h>
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_LIBCUDACXX_BEGIN_NAMESPACE_STD
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#if !defined(_CCCL_NO_CONCEPTS)
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// [concept.invocable]
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template <class _Fn, class... _Args>
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concept invocable = requires(_Fn&& __fn, _Args&&... __args) {
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_CUDA_VSTD::__invoke(_CUDA_VSTD::forward<_Fn>(__fn), _CUDA_VSTD::forward<_Args>(__args)...); // not required to be
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// equality preserving
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};
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// [concept.regular.invocable]
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template <class _Fn, class... _Args>
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concept regular_invocable = invocable<_Fn, _Args...>;
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template <class _Fun, class... _Args>
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concept __invoke_constructible = requires(_Fun&& __fun, _Args&&... __args) {
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static_cast<remove_cvref_t<invoke_result_t<_Fun, _Args...>>>(
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_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Fun>(__fun), _CUDA_VSTD::forward<_Args>(__args)...));
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};
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#elif !defined(_CCCL_NO_VARIABLE_TEMPLATES) // ^^^ !_CCCL_NO_CONCEPTS ^^^
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template <class _Fn, class... _Args>
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_CCCL_CONCEPT_FRAGMENT(_Invocable_,
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requires(_Fn&& __fn, _Args&&... __args)(
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(_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Fn>(__fn), _CUDA_VSTD::forward<_Args>(__args)...))));
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template <class _Fn, class... _Args>
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_CCCL_CONCEPT invocable = _CCCL_FRAGMENT(_Invocable_, _Fn, _Args...);
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template <class _Fn, class... _Args>
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_CCCL_CONCEPT regular_invocable = invocable<_Fn, _Args...>;
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template <class _Fun, class... _Args>
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_CCCL_CONCEPT_FRAGMENT(
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__invoke_constructible_,
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requires(_Fun&& __fun, _Args&&... __args)((static_cast<remove_cvref_t<invoke_result_t<_Fun, _Args...>>>(
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_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Fun>(__fun), _CUDA_VSTD::forward<_Args>(__args)...)))));
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template <class _Fun, class... _Args>
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_CCCL_CONCEPT __invoke_constructible = _CCCL_FRAGMENT(__invoke_constructible_, _Fun, _Args...);
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#endif // ^^^ !_CCCL_NO_VARIABLE_TEMPLATES
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_LIBCUDACXX_END_NAMESPACE_STD
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#endif // _LIBCUDACXX___CONCEPTS_INVOCABLE_H
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