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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_COMMON_WITH_H
#define _LIBCUDACXX___CONCEPTS_COMMON_WITH_H
#ifndef __cuda_std__
#include <__config>
#endif //__cuda_std__
#include "../__concepts/__concept_macros.h"
#include "../__concepts/common_reference_with.h"
#include "../__concepts/same_as.h"
#include "../__type_traits/add_lvalue_reference.h"
#include "../__type_traits/common_type.h"
#include "../__utility/declval.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.common]
template<class _Tp, class _Up>
concept common_with =
same_as<common_type_t<_Tp, _Up>, common_type_t<_Up, _Tp>> &&
requires {
static_cast<common_type_t<_Tp, _Up>>(_CUDA_VSTD::declval<_Tp>());
static_cast<common_type_t<_Tp, _Up>>(_CUDA_VSTD::declval<_Up>());
} &&
common_reference_with<
add_lvalue_reference_t<const _Tp>,
add_lvalue_reference_t<const _Up>> &&
common_reference_with<
add_lvalue_reference_t<common_type_t<_Tp, _Up>>,
common_reference_t<
add_lvalue_reference_t<const _Tp>,
add_lvalue_reference_t<const _Up>>>;
#elif _LIBCUDACXX_STD_VER > 11
template<class _Tp, class _Up>
_LIBCUDACXX_CONCEPT_FRAGMENT(
__common_type_exists_,
requires()(
typename(common_type_t<_Tp, _Up>),
typename(common_type_t<_Up, _Tp>)
));
template<class _Tp, class _Up>
_LIBCUDACXX_CONCEPT _Common_type_exists = _LIBCUDACXX_FRAGMENT(__common_type_exists_, _Tp, _Up);
template<class _Tp, class _Up>
_LIBCUDACXX_CONCEPT_FRAGMENT(
__common_type_constructible_,
requires()(
requires(_Common_type_exists<_Tp, _Up>),
static_cast<common_type_t<_Tp, _Up>>(_CUDA_VSTD::declval<_Tp>()),
static_cast<common_type_t<_Tp, _Up>>(_CUDA_VSTD::declval<_Up>())
));
template<class _Tp, class _Up>
_LIBCUDACXX_CONCEPT _Common_type_constructible = _LIBCUDACXX_FRAGMENT(__common_type_constructible_, _Tp, _Up);
template<class _Tp, class _Up>
_LIBCUDACXX_CONCEPT_FRAGMENT(
__common_with_,
requires()(
requires(_Common_type_constructible<_Tp, _Up>),
requires(same_as<common_type_t<_Tp, _Up>, common_type_t<_Up, _Tp>>),
requires(common_reference_with<
add_lvalue_reference_t<const _Tp>,
add_lvalue_reference_t<const _Up>>),
requires(common_reference_with<
add_lvalue_reference_t<common_type_t<_Tp, _Up>>,
common_reference_t<
add_lvalue_reference_t<const _Tp>,
add_lvalue_reference_t<const _Up>>>)));
template<class _Tp, class _Up>
_LIBCUDACXX_CONCEPT common_with = _LIBCUDACXX_FRAGMENT(__common_with_, _Tp, _Up);
#endif // _LIBCUDACXX_STD_VER > 11
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___CONCEPTS_COMMON_WITH_H
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