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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_PREDICATE_H
#define _LIBCUDACXX___CONCEPTS_PREDICATE_H
#ifndef __cuda_std__
#include <__config>
#endif //__cuda_std__
#include "../__concepts/__concept_macros.h"
#include "../__concepts/boolean_testable.h"
#include "../__concepts/invocable.h"
#include "../__functional/invoke.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
template<class _Fn, class... _Args>
concept predicate =
regular_invocable<_Fn, _Args...> && __boolean_testable<invoke_result_t<_Fn, _Args...>>;
#elif _LIBCUDACXX_STD_VER > 11
// [concept.predicate]
template<class _Fn, class... _Args>
_LIBCUDACXX_CONCEPT_FRAGMENT(
_Predicate_,
requires()(//
requires(regular_invocable<_Fn, _Args...>),
requires(__boolean_testable<invoke_result_t<_Fn, _Args...>>)
));
template<class _Fn, class... _Args>
_LIBCUDACXX_CONCEPT predicate = _LIBCUDACXX_FRAGMENT(_Predicate_, _Fn, _Args...);
#endif // _LIBCUDACXX_STD_VER > 11
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___CONCEPTS_PREDICATE_H
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