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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.
88 lines
2.7 KiB
C++
88 lines
2.7 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_REMOVE_IF_H
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#define _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H
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#include <__config>
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#include <__algorithm/ranges_find_if.h>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__functional/ranges_operations.h>
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#include <__iterator/concepts.h>
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#include <__iterator/iter_move.h>
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#include <__iterator/permutable.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/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 _Iter, class _Sent, class _Proj, class _Pred>
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_LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
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__remove_if_impl(_Iter __first, _Sent __last, _Pred& __pred, _Proj& __proj) {
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auto __new_end = ranges::__find_if_impl(__first, __last, __pred, __proj);
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if (__new_end == __last)
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return {__new_end, __new_end};
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_Iter __i = __new_end;
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while (++__i != __last) {
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if (!std::invoke(__pred, std::invoke(__proj, *__i))) {
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*__new_end = ranges::iter_move(__i);
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++__new_end;
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}
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}
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return {__new_end, __i};
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}
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struct __remove_if {
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template <permutable _Iter,
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sentinel_for<_Iter> _Sent,
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class _Proj = identity,
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indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
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operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const {
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return ranges::__remove_if_impl(std::move(__first), std::move(__last), __pred, __proj);
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}
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template <forward_range _Range,
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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 permutable<iterator_t<_Range>>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
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operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const {
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return ranges::__remove_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
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}
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};
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inline namespace __cpo {
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inline constexpr auto remove_if = __remove_if{};
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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_REMOVE_IF_H
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