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 //===----------------------------------------------------------------------===// 9*bdd1243dSDimitry Andric 10fe6060f1SDimitry Andric #ifndef _LIBCPP___RANGES_ALL_H 11fe6060f1SDimitry Andric #define _LIBCPP___RANGES_ALL_H 12fe6060f1SDimitry Andric 13fe6060f1SDimitry Andric #include <__config> 14fe6060f1SDimitry Andric #include <__iterator/concepts.h> 15fe6060f1SDimitry Andric #include <__iterator/iterator_traits.h> 16fe6060f1SDimitry Andric #include <__ranges/access.h> 17fe6060f1SDimitry Andric #include <__ranges/concepts.h> 1804eeddc0SDimitry Andric #include <__ranges/owning_view.h> 19349cc55cSDimitry Andric #include <__ranges/range_adaptor.h> 20fe6060f1SDimitry Andric #include <__ranges/ref_view.h> 210eae32dcSDimitry Andric #include <__utility/auto_cast.h> 22fe6060f1SDimitry Andric #include <__utility/declval.h> 23fe6060f1SDimitry Andric #include <__utility/forward.h> 24fe6060f1SDimitry Andric #include <type_traits> 25fe6060f1SDimitry Andric 26fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 27fe6060f1SDimitry Andric # pragma GCC system_header 28fe6060f1SDimitry Andric #endif 29fe6060f1SDimitry Andric 30fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 31fe6060f1SDimitry Andric 32*bdd1243dSDimitry Andric #if _LIBCPP_STD_VER > 17 33fe6060f1SDimitry Andric 34349cc55cSDimitry Andric namespace ranges::views { 35fe6060f1SDimitry Andric 36fe6060f1SDimitry Andric namespace __all { 37349cc55cSDimitry Andric struct __fn : __range_adaptor_closure<__fn> { 38fe6060f1SDimitry Andric template<class _Tp> 39fe6060f1SDimitry Andric requires ranges::view<decay_t<_Tp>> 40349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 41fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 4281ad6265SDimitry Andric noexcept(noexcept(_LIBCPP_AUTO_CAST(std::forward<_Tp>(__t)))) 4381ad6265SDimitry Andric -> decltype(_LIBCPP_AUTO_CAST(std::forward<_Tp>(__t))) 44fe6060f1SDimitry Andric { 4581ad6265SDimitry Andric return _LIBCPP_AUTO_CAST(std::forward<_Tp>(__t)); 46fe6060f1SDimitry Andric } 47fe6060f1SDimitry Andric 48fe6060f1SDimitry Andric template<class _Tp> 49fe6060f1SDimitry Andric requires (!ranges::view<decay_t<_Tp>>) && 5081ad6265SDimitry Andric requires (_Tp&& __t) { ranges::ref_view{std::forward<_Tp>(__t)}; } 51349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 52fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 5381ad6265SDimitry Andric noexcept(noexcept(ranges::ref_view{std::forward<_Tp>(__t)})) 54fe6060f1SDimitry Andric { 5581ad6265SDimitry Andric return ranges::ref_view{std::forward<_Tp>(__t)}; 56fe6060f1SDimitry Andric } 57fe6060f1SDimitry Andric 58fe6060f1SDimitry Andric template<class _Tp> 59fe6060f1SDimitry Andric requires (!ranges::view<decay_t<_Tp>> && 6081ad6265SDimitry Andric !requires (_Tp&& __t) { ranges::ref_view{std::forward<_Tp>(__t)}; } && 6181ad6265SDimitry Andric requires (_Tp&& __t) { ranges::owning_view{std::forward<_Tp>(__t)}; }) 62349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 63fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 6481ad6265SDimitry Andric noexcept(noexcept(ranges::owning_view{std::forward<_Tp>(__t)})) 65fe6060f1SDimitry Andric { 6681ad6265SDimitry Andric return ranges::owning_view{std::forward<_Tp>(__t)}; 67fe6060f1SDimitry Andric } 68fe6060f1SDimitry Andric }; 691fd87a68SDimitry Andric } // namespace __all 70fe6060f1SDimitry Andric 71fe6060f1SDimitry Andric inline namespace __cpo { 72fe6060f1SDimitry Andric inline constexpr auto all = __all::__fn{}; 73fe6060f1SDimitry Andric } // namespace __cpo 74fe6060f1SDimitry Andric 75fe6060f1SDimitry Andric template<ranges::viewable_range _Range> 76*bdd1243dSDimitry Andric using all_t = decltype(views::all(std::declval<_Range>())); 77fe6060f1SDimitry Andric 78349cc55cSDimitry Andric } // namespace ranges::views 79fe6060f1SDimitry Andric 80*bdd1243dSDimitry Andric #endif // _LIBCPP_STD_VER > 17 81fe6060f1SDimitry Andric 82fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 83fe6060f1SDimitry Andric 84fe6060f1SDimitry Andric #endif // _LIBCPP___RANGES_ALL_H 85