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//
// 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___CONCEPTS_DERIVED_FROM_H
#define _LIBCUDACXX___CONCEPTS_DERIVED_FROM_H
#ifndef __cuda_std__
#include <__config>
#endif //__cuda_std__
#include "../__concepts/__concept_macros.h"
#include "../__type_traits/add_pointer.h"
#include "../__type_traits/is_base_of.h"
#include "../__type_traits/is_convertible.h"
#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 > 17
// [concept.derived]
template<class _Dp, class _Bp>
concept derived_from =
is_base_of_v<_Bp, _Dp> &&
is_convertible_v<const volatile _Dp*, const volatile _Bp*>;
#elif _LIBCUDACXX_STD_VER > 11
template<class _Dp, class _Bp>
_LIBCUDACXX_CONCEPT_FRAGMENT(
__derived_from_,
requires()(
requires(_LIBCUDACXX_TRAIT(is_base_of, _Bp, _Dp)),
requires(_LIBCUDACXX_TRAIT(is_convertible, add_pointer_t<const volatile _Dp>, add_pointer_t<const volatile _Bp>))
));
template<class _Dp, class _Bp>
_LIBCUDACXX_CONCEPT derived_from = _LIBCUDACXX_FRAGMENT(__derived_from_, _Dp, _Bp);
#endif // _LIBCUDACXX_STD_VER > 11
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___CONCEPTS_DERIVED_FROM_H
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