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d10dc5a06f
We originally put implementation-detail function objects into individual namespaces for `std::ranges` without a good reason for doing so. This practice was continued, presumably because there was prior art. Since there's no reason to keep these namespaces, this commit removes them, which will slightly impact binary size. This commit does not apply to CPOs, some of which need additional work.
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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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___ALGORITHM_RANGES_REVERSE_COPY_H
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#define _LIBCPP___ALGORITHM_RANGES_REVERSE_COPY_H
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#include <__algorithm/in_out_result.h>
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#include <__algorithm/ranges_copy.h>
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/next.h>
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#include <__iterator/reverse_iterator.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/dangling.h>
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#include <__ranges/subrange.h>
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#include <__utility/move.h>
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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_PUSH_MACROS
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#include <__undef_macros>
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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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template <class _InIter, class _OutIter>
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using reverse_copy_result = in_out_result<_InIter, _OutIter>;
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struct __reverse_copy {
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template <bidirectional_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
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requires indirectly_copyable<_InIter, _OutIter>
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_LIBCPP_HIDE_FROM_ABI constexpr reverse_copy_result<_InIter, _OutIter>
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operator()(_InIter __first, _Sent __last, _OutIter __result) const {
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return (*this)(subrange(std::move(__first), std::move(__last)), std::move(__result));
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}
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template <bidirectional_range _Range, weakly_incrementable _OutIter>
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requires indirectly_copyable<iterator_t<_Range>, _OutIter>
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_LIBCPP_HIDE_FROM_ABI constexpr reverse_copy_result<borrowed_iterator_t<_Range>, _OutIter>
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operator()(_Range&& __range, _OutIter __result) const {
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auto __ret = ranges::copy(std::__reverse_range(__range), std::move(__result));
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return {ranges::next(ranges::begin(__range), ranges::end(__range)), std::move(__ret.out)};
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}
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};
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inline namespace __cpo {
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inline constexpr auto reverse_copy = __reverse_copy{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_RANGES_REVERSE_COPY_H
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