1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ITERATOR_MOVE_SENTINEL_H 10*4bdff4beSrobert #define _LIBCPP___ITERATOR_MOVE_SENTINEL_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__concepts/assignable.h> 13*4bdff4beSrobert #include <__concepts/convertible_to.h> 14*4bdff4beSrobert #include <__concepts/semiregular.h> 15*4bdff4beSrobert #include <__config> 16*4bdff4beSrobert #include <__utility/move.h> 17*4bdff4beSrobert 18*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19*4bdff4beSrobert # pragma GCC system_header 20*4bdff4beSrobert #endif 21*4bdff4beSrobert 22*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 23*4bdff4beSrobert 24*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 25*4bdff4beSrobert 26*4bdff4beSrobert template <semiregular _Sent> 27*4bdff4beSrobert class _LIBCPP_TEMPLATE_VIS move_sentinel 28*4bdff4beSrobert { 29*4bdff4beSrobert public: 30*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI 31*4bdff4beSrobert move_sentinel() = default; 32*4bdff4beSrobert 33*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr move_sentinel(_Sent __s)34*4bdff4beSrobert explicit move_sentinel(_Sent __s) : __last_(std::move(__s)) {} 35*4bdff4beSrobert 36*4bdff4beSrobert template <class _S2> 37*4bdff4beSrobert requires convertible_to<const _S2&, _Sent> 38*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr move_sentinel(const move_sentinel<_S2> & __s)39*4bdff4beSrobert move_sentinel(const move_sentinel<_S2>& __s) : __last_(__s.base()) {} 40*4bdff4beSrobert 41*4bdff4beSrobert template <class _S2> 42*4bdff4beSrobert requires assignable_from<_Sent&, const _S2&> 43*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr 44*4bdff4beSrobert move_sentinel& operator=(const move_sentinel<_S2>& __s) 45*4bdff4beSrobert { __last_ = __s.base(); return *this; } 46*4bdff4beSrobert base()47*4bdff4beSrobert constexpr _Sent base() const { return __last_; } 48*4bdff4beSrobert 49*4bdff4beSrobert private: 50*4bdff4beSrobert _Sent __last_ = _Sent(); 51*4bdff4beSrobert }; 52*4bdff4beSrobert 53*4bdff4beSrobert _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(move_sentinel); 54*4bdff4beSrobert 55*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 56*4bdff4beSrobert 57*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 58*4bdff4beSrobert 59*4bdff4beSrobert #endif // _LIBCPP___ITERATOR_MOVE_SENTINEL_H 60