1fe6060f1SDimitry Andric // -*- C++ -*- 2fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 3fe6060f1SDimitry Andric // 4fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7fe6060f1SDimitry Andric // 8fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 9fe6060f1SDimitry Andric #ifndef _LIBCPP___RANGES_ALL_H 10fe6060f1SDimitry Andric #define _LIBCPP___RANGES_ALL_H 11fe6060f1SDimitry Andric 12fe6060f1SDimitry Andric #include <__config> 13fe6060f1SDimitry Andric #include <__iterator/concepts.h> 14fe6060f1SDimitry Andric #include <__iterator/iterator_traits.h> 15fe6060f1SDimitry Andric #include <__ranges/access.h> 16fe6060f1SDimitry Andric #include <__ranges/concepts.h> 1704eeddc0SDimitry Andric #include <__ranges/owning_view.h> 18349cc55cSDimitry Andric #include <__ranges/range_adaptor.h> 19fe6060f1SDimitry Andric #include <__ranges/ref_view.h> 200eae32dcSDimitry Andric #include <__utility/auto_cast.h> 21fe6060f1SDimitry Andric #include <__utility/declval.h> 22fe6060f1SDimitry Andric #include <__utility/forward.h> 23fe6060f1SDimitry Andric #include <type_traits> 24fe6060f1SDimitry Andric 25fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 26fe6060f1SDimitry Andric # pragma GCC system_header 27fe6060f1SDimitry Andric #endif 28fe6060f1SDimitry Andric 29fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 30fe6060f1SDimitry Andric 31*81ad6265SDimitry Andric #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 32fe6060f1SDimitry Andric 33349cc55cSDimitry Andric namespace ranges::views { 34fe6060f1SDimitry Andric 35fe6060f1SDimitry Andric namespace __all { 36349cc55cSDimitry Andric struct __fn : __range_adaptor_closure<__fn> { 37fe6060f1SDimitry Andric template<class _Tp> 38fe6060f1SDimitry Andric requires ranges::view<decay_t<_Tp>> 39349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 40fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 41*81ad6265SDimitry Andric noexcept(noexcept(_LIBCPP_AUTO_CAST(std::forward<_Tp>(__t)))) 42*81ad6265SDimitry Andric -> decltype(_LIBCPP_AUTO_CAST(std::forward<_Tp>(__t))) 43fe6060f1SDimitry Andric { 44*81ad6265SDimitry Andric return _LIBCPP_AUTO_CAST(std::forward<_Tp>(__t)); 45fe6060f1SDimitry Andric } 46fe6060f1SDimitry Andric 47fe6060f1SDimitry Andric template<class _Tp> 48fe6060f1SDimitry Andric requires (!ranges::view<decay_t<_Tp>>) && 49*81ad6265SDimitry Andric requires (_Tp&& __t) { ranges::ref_view{std::forward<_Tp>(__t)}; } 50349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 51fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 52*81ad6265SDimitry Andric noexcept(noexcept(ranges::ref_view{std::forward<_Tp>(__t)})) 53fe6060f1SDimitry Andric { 54*81ad6265SDimitry Andric return ranges::ref_view{std::forward<_Tp>(__t)}; 55fe6060f1SDimitry Andric } 56fe6060f1SDimitry Andric 57fe6060f1SDimitry Andric template<class _Tp> 58fe6060f1SDimitry Andric requires (!ranges::view<decay_t<_Tp>> && 59*81ad6265SDimitry Andric !requires (_Tp&& __t) { ranges::ref_view{std::forward<_Tp>(__t)}; } && 60*81ad6265SDimitry Andric requires (_Tp&& __t) { ranges::owning_view{std::forward<_Tp>(__t)}; }) 61349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 62fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 63*81ad6265SDimitry Andric noexcept(noexcept(ranges::owning_view{std::forward<_Tp>(__t)})) 64fe6060f1SDimitry Andric { 65*81ad6265SDimitry Andric return ranges::owning_view{std::forward<_Tp>(__t)}; 66fe6060f1SDimitry Andric } 67fe6060f1SDimitry Andric }; 681fd87a68SDimitry Andric } // namespace __all 69fe6060f1SDimitry Andric 70fe6060f1SDimitry Andric inline namespace __cpo { 71fe6060f1SDimitry Andric inline constexpr auto all = __all::__fn{}; 72fe6060f1SDimitry Andric } // namespace __cpo 73fe6060f1SDimitry Andric 74fe6060f1SDimitry Andric template<ranges::viewable_range _Range> 75fe6060f1SDimitry Andric using all_t = decltype(views::all(declval<_Range>())); 76fe6060f1SDimitry Andric 77349cc55cSDimitry Andric } // namespace ranges::views 78fe6060f1SDimitry Andric 79*81ad6265SDimitry Andric #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 80fe6060f1SDimitry Andric 81fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 82fe6060f1SDimitry Andric 83fe6060f1SDimitry Andric #endif // _LIBCPP___RANGES_ALL_H 84