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.
107 lines
3.9 KiB
C++
107 lines
3.9 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_PARTITION_COPY_H
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#define _LIBCPP___ALGORITHM_RANGES_PARTITION_COPY_H
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#include <__algorithm/in_out_out_result.h>
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__iterator/concepts.h>
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#include <__iterator/iterator_traits.h>
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#include <__iterator/projected.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 <__type_traits/remove_cvref.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 _OutIter1, class _OutIter2>
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using partition_copy_result = in_out_out_result<_InIter, _OutIter1, _OutIter2>;
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struct __partition_copy {
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// TODO(ranges): delegate to the classic algorithm.
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template <class _InIter, class _Sent, class _OutIter1, class _OutIter2, class _Proj, class _Pred>
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_LIBCPP_HIDE_FROM_ABI constexpr static partition_copy_result<__remove_cvref_t<_InIter>,
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__remove_cvref_t<_OutIter1>,
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__remove_cvref_t<_OutIter2> >
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__partition_copy_fn_impl(
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_InIter&& __first,
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_Sent&& __last,
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_OutIter1&& __out_true,
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_OutIter2&& __out_false,
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_Pred& __pred,
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_Proj& __proj) {
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for (; __first != __last; ++__first) {
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if (std::invoke(__pred, std::invoke(__proj, *__first))) {
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*__out_true = *__first;
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++__out_true;
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} else {
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*__out_false = *__first;
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++__out_false;
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}
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}
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return {std::move(__first), std::move(__out_true), std::move(__out_false)};
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}
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template <input_iterator _InIter,
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sentinel_for<_InIter> _Sent,
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weakly_incrementable _OutIter1,
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weakly_incrementable _OutIter2,
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class _Proj = identity,
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indirect_unary_predicate<projected<_InIter, _Proj>> _Pred>
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requires indirectly_copyable<_InIter, _OutIter1> && indirectly_copyable<_InIter, _OutIter2>
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_LIBCPP_HIDE_FROM_ABI constexpr partition_copy_result<_InIter, _OutIter1, _OutIter2> operator()(
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_InIter __first, _Sent __last, _OutIter1 __out_true, _OutIter2 __out_false, _Pred __pred, _Proj __proj = {})
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const {
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return __partition_copy_fn_impl(
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std::move(__first), std::move(__last), std::move(__out_true), std::move(__out_false), __pred, __proj);
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}
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template <input_range _Range,
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weakly_incrementable _OutIter1,
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weakly_incrementable _OutIter2,
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class _Proj = identity,
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indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
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requires indirectly_copyable<iterator_t<_Range>, _OutIter1> && indirectly_copyable<iterator_t<_Range>, _OutIter2>
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_LIBCPP_HIDE_FROM_ABI constexpr partition_copy_result<borrowed_iterator_t<_Range>, _OutIter1, _OutIter2>
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operator()(_Range&& __range, _OutIter1 __out_true, _OutIter2 __out_false, _Pred __pred, _Proj __proj = {}) const {
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return __partition_copy_fn_impl(
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ranges::begin(__range), ranges::end(__range), std::move(__out_true), std::move(__out_false), __pred, __proj);
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}
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};
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inline namespace __cpo {
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inline constexpr auto partition_copy = __partition_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_PARTITION_COPY_H
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