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.
86 lines
2.8 KiB
C++
86 lines
2.8 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_COPY_IF_H
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#define _LIBCPP___ALGORITHM_RANGES_COPY_IF_H
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#include <__algorithm/in_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/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 <__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 _Ip, class _Op>
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using copy_if_result = in_out_result<_Ip, _Op>;
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struct __copy_if {
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template <class _InIter, class _Sent, class _OutIter, class _Proj, class _Pred>
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_LIBCPP_HIDE_FROM_ABI static constexpr copy_if_result<_InIter, _OutIter>
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__copy_if_impl(_InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, _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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*__result = *__first;
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++__result;
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}
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}
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return {std::move(__first), std::move(__result)};
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}
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template <input_iterator _Iter,
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sentinel_for<_Iter> _Sent,
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weakly_incrementable _OutIter,
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class _Proj = identity,
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indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
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requires indirectly_copyable<_Iter, _OutIter>
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_LIBCPP_HIDE_FROM_ABI constexpr copy_if_result<_Iter, _OutIter>
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operator()(_Iter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const {
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return __copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj);
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}
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template <input_range _Range,
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weakly_incrementable _OutIter,
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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>, _OutIter>
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_LIBCPP_HIDE_FROM_ABI constexpr copy_if_result<borrowed_iterator_t<_Range>, _OutIter>
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operator()(_Range&& __r, _OutIter __result, _Pred __pred, _Proj __proj = {}) const {
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return __copy_if_impl(ranges::begin(__r), ranges::end(__r), std::move(__result), __pred, __proj);
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}
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};
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inline namespace __cpo {
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inline constexpr auto copy_if = __copy_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_COPY_IF_H
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