| // -*- 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_OWNING_VIEW_H |
| #define _LIBCPP___RANGES_OWNING_VIEW_H |
| |
| #include <__concepts/constructible.h> |
| #include <__concepts/movable.h> |
| #include <__config> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| #include <__ranges/data.h> |
| #include <__ranges/empty.h> |
| #include <__ranges/enable_borrowed_range.h> |
| #include <__ranges/size.h> |
| #include <__ranges/view_interface.h> |
| #include <__utility/move.h> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) |
| |
| namespace ranges { |
| template<range _Rp> |
| requires movable<_Rp> && (!__is_std_initializer_list<remove_cvref_t<_Rp>>) |
| class owning_view : public view_interface<owning_view<_Rp>> { |
| _Rp __r_ = _Rp(); |
| |
| public: |
| owning_view() requires default_initializable<_Rp> = default; |
| _LIBCPP_HIDE_FROM_ABI constexpr owning_view(_Rp&& __r) : __r_(std::move(__r)) {} |
| |
| owning_view(owning_view&&) = default; |
| owning_view& operator=(owning_view&&) = default; |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr _Rp& base() & noexcept { return __r_; } |
| _LIBCPP_HIDE_FROM_ABI constexpr const _Rp& base() const& noexcept { return __r_; } |
| _LIBCPP_HIDE_FROM_ABI constexpr _Rp&& base() && noexcept { return std::move(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr const _Rp&& base() const&& noexcept { return std::move(__r_); } |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr iterator_t<_Rp> begin() { return ranges::begin(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr sentinel_t<_Rp> end() { return ranges::end(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr auto begin() const requires range<const _Rp> { return ranges::begin(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr auto end() const requires range<const _Rp> { return ranges::end(__r_); } |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr bool empty() requires requires { ranges::empty(__r_); } |
| { return ranges::empty(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr bool empty() const requires requires { ranges::empty(__r_); } |
| { return ranges::empty(__r_); } |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr auto size() requires sized_range<_Rp> |
| { return ranges::size(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr auto size() const requires sized_range<const _Rp> |
| { return ranges::size(__r_); } |
| |
| _LIBCPP_HIDE_FROM_ABI constexpr auto data() requires contiguous_range<_Rp> |
| { return ranges::data(__r_); } |
| _LIBCPP_HIDE_FROM_ABI constexpr auto data() const requires contiguous_range<const _Rp> |
| { return ranges::data(__r_); } |
| }; |
| |
| template<class _Tp> |
| inline constexpr bool enable_borrowed_range<owning_view<_Tp>> = enable_borrowed_range<_Tp>; |
| |
| } // namespace ranges |
| |
| #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___RANGES_OWNING_VIEW_H |