| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // 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___RANGES_ALL_H |
| #define _LIBCPP___RANGES_ALL_H |
| |
| #include <__config> |
| #include <__functional/compose.h> // TODO(modules): Those should not be required |
| #include <__functional/perfect_forward.h> // |
| #include <__iterator/concepts.h> |
| #include <__iterator/iterator_traits.h> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| #include <__ranges/owning_view.h> |
| #include <__ranges/range_adaptor.h> |
| #include <__ranges/ref_view.h> |
| #include <__type_traits/decay.h> |
| #include <__utility/auto_cast.h> |
| #include <__utility/declval.h> |
| #include <__utility/forward.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER >= 20 |
| |
| namespace ranges::views { |
| |
| namespace __all { |
| struct __fn : __range_adaptor_closure<__fn> { |
| template <class _Tp> |
| requires ranges::view<decay_t<_Tp>> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const |
| noexcept(noexcept(_LIBCPP_AUTO_CAST(std::forward<_Tp>(__t)))) |
| -> decltype(_LIBCPP_AUTO_CAST(std::forward<_Tp>(__t))) { |
| return _LIBCPP_AUTO_CAST(std::forward<_Tp>(__t)); |
| } |
| |
| template <class _Tp> |
| requires(!ranges::view<decay_t<_Tp>>) && requires(_Tp&& __t) { ranges::ref_view{std::forward<_Tp>(__t)}; } |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const |
| noexcept(noexcept(ranges::ref_view{std::forward<_Tp>(__t)})) { |
| return ranges::ref_view{std::forward<_Tp>(__t)}; |
| } |
| |
| template <class _Tp> |
| requires( |
| !ranges::view<decay_t<_Tp>> && !requires(_Tp&& __t) { ranges::ref_view{std::forward<_Tp>(__t)}; } && |
| requires(_Tp&& __t) { ranges::owning_view{std::forward<_Tp>(__t)}; }) |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Tp&& __t) const |
| noexcept(noexcept(ranges::owning_view{std::forward<_Tp>(__t)})) { |
| return ranges::owning_view{std::forward<_Tp>(__t)}; |
| } |
| }; |
| } // namespace __all |
| |
| inline namespace __cpo { |
| inline constexpr auto all = __all::__fn{}; |
| } // namespace __cpo |
| |
| template <ranges::viewable_range _Range> |
| using all_t = decltype(views::all(std::declval<_Range>())); |
| |
| } // namespace ranges::views |
| |
| #endif // _LIBCPP_STD_VER >= 20 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___RANGES_ALL_H |