forked from OSchip/llvm-project
82 lines
3.1 KiB
C++
82 lines
3.1 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___RANGES_OWNING_VIEW_H
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#define _LIBCPP___RANGES_OWNING_VIEW_H
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#include <__concepts/constructible.h>
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#include <__concepts/movable.h>
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#include <__config>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/data.h>
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#include <__ranges/empty.h>
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#include <__ranges/enable_borrowed_range.h>
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#include <__ranges/size.h>
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#include <__ranges/view_interface.h>
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#include <__utility/move.h>
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#include <type_traits>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if !defined(_LIBCPP_HAS_NO_RANGES)
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namespace ranges {
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template<range _Rp>
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requires movable<_Rp> && (!__is_std_initializer_list<remove_cvref_t<_Rp>>)
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class owning_view : public view_interface<owning_view<_Rp>> {
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_Rp __r_ = _Rp();
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public:
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owning_view() requires default_initializable<_Rp> = default;
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_LIBCPP_HIDE_FROM_ABI constexpr owning_view(_Rp&& __r) : __r_(_VSTD::move(__r)) {}
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owning_view(owning_view&&) = default;
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owning_view& operator=(owning_view&&) = default;
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_LIBCPP_HIDE_FROM_ABI constexpr _Rp& base() & noexcept { return __r_; }
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_LIBCPP_HIDE_FROM_ABI constexpr const _Rp& base() const& noexcept { return __r_; }
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_LIBCPP_HIDE_FROM_ABI constexpr _Rp&& base() && noexcept { return _VSTD::move(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr const _Rp&& base() const&& noexcept { return _VSTD::move(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr iterator_t<_Rp> begin() { return ranges::begin(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr sentinel_t<_Rp> end() { return ranges::end(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr auto begin() const requires range<const _Rp> { return ranges::begin(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr auto end() const requires range<const _Rp> { return ranges::end(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr bool empty() requires requires { ranges::empty(__r_); }
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{ return ranges::empty(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr bool empty() const requires requires { ranges::empty(__r_); }
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{ return ranges::empty(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr auto size() requires sized_range<_Rp>
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{ return ranges::size(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr auto size() const requires sized_range<const _Rp>
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{ return ranges::size(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr auto data() requires contiguous_range<_Rp>
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{ return ranges::data(__r_); }
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_LIBCPP_HIDE_FROM_ABI constexpr auto data() const requires contiguous_range<const _Rp>
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{ return ranges::data(__r_); }
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};
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template<class _Tp>
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inline constexpr bool enable_borrowed_range<owning_view<_Tp>> = enable_borrowed_range<_Tp>;
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} // namespace ranges
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#endif // !defined(_LIBCPP_HAS_NO_RANGES)
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___RANGES_OWNING_VIEW_H
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