codekingpro/portable-devtools

1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCUDACXX___CONCEPTS_DERIVED_FROM_H11#define _LIBCUDACXX___CONCEPTS_DERIVED_FROM_H12 13#ifndef __cuda_std__14#include <__config>15#endif //__cuda_std__16 17#include "../__concepts/__concept_macros.h"18#include "../__type_traits/add_pointer.h"19#include "../__type_traits/is_base_of.h"20#include "../__type_traits/is_convertible.h"21 22#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)23#  pragma GCC system_header24#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)25#  pragma clang system_header26#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)27#  pragma system_header28#endif // no system header29 30_LIBCUDACXX_BEGIN_NAMESPACE_STD31 32#if _LIBCUDACXX_STD_VER > 1733 34// [concept.derived]35 36template<class _Dp, class _Bp>37concept derived_from =38  is_base_of_v<_Bp, _Dp> &&39  is_convertible_v<const volatile _Dp*, const volatile _Bp*>;40 41#elif _LIBCUDACXX_STD_VER > 1142 43template<class _Dp, class _Bp>44_LIBCUDACXX_CONCEPT_FRAGMENT(45  __derived_from_,46  requires()(47    requires(_LIBCUDACXX_TRAIT(is_base_of, _Bp, _Dp)),48    requires(_LIBCUDACXX_TRAIT(is_convertible, add_pointer_t<const volatile _Dp>, add_pointer_t<const volatile _Bp>))49  ));50 51template<class _Dp, class _Bp>52_LIBCUDACXX_CONCEPT derived_from = _LIBCUDACXX_FRAGMENT(__derived_from_, _Dp, _Bp);53 54#endif // _LIBCUDACXX_STD_VER > 1155 56_LIBCUDACXX_END_NAMESPACE_STD57 58#endif // _LIBCUDACXX___CONCEPTS_DERIVED_FROM_H59