| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ITERATOR_MOVE_SENTINEL_H |
| #define _LIBCPP___ITERATOR_MOVE_SENTINEL_H |
| |
| #include <__concepts/assignable.h> |
| #include <__concepts/convertible_to.h> |
| #include <__concepts/semiregular.h> |
| #include <__config> |
| #include <__utility/move.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER >= 20 |
| |
| template <semiregular _Sent> |
| class _LIBCPP_TEMPLATE_VIS move_sentinel |
| { |
| public: |
| _LIBCPP_HIDE_FROM_ABI |
| move_sentinel() = default; |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| explicit move_sentinel(_Sent __s) : __last_(std::move(__s)) {} |
| |
| template <class _S2> |
| requires convertible_to<const _S2&, _Sent> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| move_sentinel(const move_sentinel<_S2>& __s) : __last_(__s.base()) {} |
| |
| template <class _S2> |
| requires assignable_from<_Sent&, const _S2&> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| move_sentinel& operator=(const move_sentinel<_S2>& __s) |
| { __last_ = __s.base(); return *this; } |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr _Sent base() const { return __last_; } |
| |
| private: |
| _Sent __last_ = _Sent(); |
| }; |
| |
| _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(move_sentinel); |
| |
| #endif // _LIBCPP_STD_VER >= 20 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___ITERATOR_MOVE_SENTINEL_H |