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*1fd87a68SDimitry Andric #if !defined(_LIBCPP_HAS_NO_CONCEPTS) 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 410eae32dcSDimitry Andric noexcept(noexcept(_LIBCPP_AUTO_CAST(_VSTD::forward<_Tp>(__t)))) 42fe6060f1SDimitry Andric { 430eae32dcSDimitry Andric return _LIBCPP_AUTO_CAST(_VSTD::forward<_Tp>(__t)); 44fe6060f1SDimitry Andric } 45fe6060f1SDimitry Andric 46fe6060f1SDimitry Andric template<class _Tp> 47fe6060f1SDimitry Andric requires (!ranges::view<decay_t<_Tp>>) && 48fe6060f1SDimitry Andric requires (_Tp&& __t) { ranges::ref_view{_VSTD::forward<_Tp>(__t)}; } 49349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 50fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 51fe6060f1SDimitry Andric noexcept(noexcept(ranges::ref_view{_VSTD::forward<_Tp>(__t)})) 52fe6060f1SDimitry Andric { 53fe6060f1SDimitry Andric return ranges::ref_view{_VSTD::forward<_Tp>(__t)}; 54fe6060f1SDimitry Andric } 55fe6060f1SDimitry Andric 56fe6060f1SDimitry Andric template<class _Tp> 57fe6060f1SDimitry Andric requires (!ranges::view<decay_t<_Tp>> && 58fe6060f1SDimitry Andric !requires (_Tp&& __t) { ranges::ref_view{_VSTD::forward<_Tp>(__t)}; } && 5904eeddc0SDimitry Andric requires (_Tp&& __t) { ranges::owning_view{_VSTD::forward<_Tp>(__t)}; }) 60349cc55cSDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI 61fe6060f1SDimitry Andric constexpr auto operator()(_Tp&& __t) const 6204eeddc0SDimitry Andric noexcept(noexcept(ranges::owning_view{_VSTD::forward<_Tp>(__t)})) 63fe6060f1SDimitry Andric { 6404eeddc0SDimitry Andric return ranges::owning_view{_VSTD::forward<_Tp>(__t)}; 65fe6060f1SDimitry Andric } 66fe6060f1SDimitry Andric }; 67*1fd87a68SDimitry Andric } // namespace __all 68fe6060f1SDimitry Andric 69fe6060f1SDimitry Andric inline namespace __cpo { 70fe6060f1SDimitry Andric inline constexpr auto all = __all::__fn{}; 71fe6060f1SDimitry Andric } // namespace __cpo 72fe6060f1SDimitry Andric 73fe6060f1SDimitry Andric template<ranges::viewable_range _Range> 74fe6060f1SDimitry Andric using all_t = decltype(views::all(declval<_Range>())); 75fe6060f1SDimitry Andric 76349cc55cSDimitry Andric } // namespace ranges::views 77fe6060f1SDimitry Andric 78*1fd87a68SDimitry Andric #endif // !defined(_LIBCPP_HAS_NO_CONCEPTS) 79fe6060f1SDimitry Andric 80fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 81fe6060f1SDimitry Andric 82fe6060f1SDimitry Andric #endif // _LIBCPP___RANGES_ALL_H 83