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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___ITERATOR_MOVE_SENTINEL_H
#define _LIBCUDACXX___ITERATOR_MOVE_SENTINEL_H
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__concepts/assignable.h"
#include "../__concepts/convertible_to.h"
#include "../__concepts/semiregular.h"
#include "../__utility/move.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
#if _LIBCUDACXX_STD_VER > 14
_LIBCUDACXX_BEGIN_NAMESPACE_STD
#if _LIBCUDACXX_STD_VER > 17
template <semiregular _Sent>
#else
template<class _Sent, enable_if_t<semiregular<_Sent>, int> = 0>
#endif
class _LIBCUDACXX_TEMPLATE_VIS move_sentinel
{
public:
_LIBCUDACXX_HIDE_FROM_ABI
constexpr move_sentinel() = default;
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr
explicit move_sentinel(_Sent __s) : __last_(_CUDA_VSTD::move(__s)) {}
_LIBCUDACXX_TEMPLATE(class _S2)
_LIBCUDACXX_REQUIRES( convertible_to<const _S2&, _Sent>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr
move_sentinel(const move_sentinel<_S2>& __s) : __last_(__s.base()) {}
_LIBCUDACXX_TEMPLATE(class _S2)
_LIBCUDACXX_REQUIRES( assignable_from<const _S2&, _Sent>)
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY constexpr
move_sentinel& operator=(const move_sentinel<_S2>& __s)
{ __last_ = __s.base(); return *this; }
_LIBCUDACXX_INLINE_VISIBILITY constexpr _Sent base() const { return __last_; }
private:
_Sent __last_ = _Sent();
};
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX_STD_VER > 14
#endif // _LIBCUDACXX___ITERATOR_MOVE_SENTINEL_H
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