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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H10#define _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H11#include <__config>12 13#include <__algorithm/ranges_find_if.h>14#include <__functional/identity.h>15#include <__functional/invoke.h>16#include <__functional/ranges_operations.h>17#include <__iterator/concepts.h>18#include <__iterator/iter_move.h>19#include <__iterator/permutable.h>20#include <__iterator/projected.h>21#include <__ranges/access.h>22#include <__ranges/concepts.h>23#include <__ranges/subrange.h>24#include <__utility/move.h>25 26#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)27# pragma GCC system_header28#endif29 30_LIBCPP_PUSH_MACROS31#include <__undef_macros>32 33#if _LIBCPP_STD_VER >= 2034 35_LIBCPP_BEGIN_NAMESPACE_STD36 37namespace ranges {38 39template <class _Iter, class _Sent, class _Proj, class _Pred>40_LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>41__remove_if_impl(_Iter __first, _Sent __last, _Pred& __pred, _Proj& __proj) {42 auto __new_end = ranges::__find_if_impl(__first, __last, __pred, __proj);43 if (__new_end == __last)44 return {__new_end, __new_end};45 46 _Iter __i = __new_end;47 while (++__i != __last) {48 if (!std::invoke(__pred, std::invoke(__proj, *__i))) {49 *__new_end = ranges::iter_move(__i);50 ++__new_end;51 }52 }53 return {__new_end, __i};54}55 56struct __remove_if {57 template <permutable _Iter,58 sentinel_for<_Iter> _Sent,59 class _Proj = identity,60 indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>61 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>62 operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const {63 return ranges::__remove_if_impl(std::move(__first), std::move(__last), __pred, __proj);64 }65 66 template <forward_range _Range,67 class _Proj = identity,68 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>69 requires permutable<iterator_t<_Range>>70 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>71 operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const {72 return ranges::__remove_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);73 }74};75 76inline namespace __cpo {77inline constexpr auto remove_if = __remove_if{};78} // namespace __cpo79} // namespace ranges80 81_LIBCPP_END_NAMESPACE_STD82 83#endif // _LIBCPP_STD_VER >= 2084 85_LIBCPP_POP_MACROS86 87#endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H88