1753f127fSDimitry Andric //===----------------------------------------------------------------------===// 2753f127fSDimitry Andric // 3753f127fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6753f127fSDimitry Andric // 7753f127fSDimitry Andric //===----------------------------------------------------------------------===// 8753f127fSDimitry Andric 9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H 10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H 11753f127fSDimitry Andric #include <__config> 12753f127fSDimitry Andric 13753f127fSDimitry Andric #include <__algorithm/ranges_find_if.h> 14753f127fSDimitry Andric #include <__functional/identity.h> 15753f127fSDimitry Andric #include <__functional/invoke.h> 16753f127fSDimitry Andric #include <__functional/ranges_operations.h> 17753f127fSDimitry Andric #include <__iterator/concepts.h> 18753f127fSDimitry Andric #include <__iterator/iter_move.h> 19753f127fSDimitry Andric #include <__iterator/permutable.h> 20753f127fSDimitry Andric #include <__iterator/projected.h> 21753f127fSDimitry Andric #include <__ranges/access.h> 22753f127fSDimitry Andric #include <__ranges/concepts.h> 23753f127fSDimitry Andric #include <__ranges/subrange.h> 24753f127fSDimitry Andric #include <__utility/move.h> 25753f127fSDimitry Andric 26753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 27753f127fSDimitry Andric # pragma GCC system_header 28753f127fSDimitry Andric #endif 29753f127fSDimitry Andric 30b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 31b3edf446SDimitry Andric #include <__undef_macros> 32b3edf446SDimitry Andric 3306c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 34753f127fSDimitry Andric 35753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 36753f127fSDimitry Andric 37753f127fSDimitry Andric namespace ranges { 38753f127fSDimitry Andric 39753f127fSDimitry Andric template <class _Iter, class _Sent, class _Proj, class _Pred> 4006c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> 4106c3fb27SDimitry Andric __remove_if_impl(_Iter __first, _Sent __last, _Pred& __pred, _Proj& __proj) { 42753f127fSDimitry Andric auto __new_end = ranges::__find_if_impl(__first, __last, __pred, __proj); 43753f127fSDimitry Andric if (__new_end == __last) 44753f127fSDimitry Andric return {__new_end, __new_end}; 45753f127fSDimitry Andric 46753f127fSDimitry Andric _Iter __i = __new_end; 47753f127fSDimitry Andric while (++__i != __last) { 48753f127fSDimitry Andric if (!std::invoke(__pred, std::invoke(__proj, *__i))) { 49753f127fSDimitry Andric *__new_end = ranges::iter_move(__i); 50753f127fSDimitry Andric ++__new_end; 51753f127fSDimitry Andric } 52753f127fSDimitry Andric } 53753f127fSDimitry Andric return {__new_end, __i}; 54753f127fSDimitry Andric } 55753f127fSDimitry Andric 56753f127fSDimitry Andric namespace __remove_if { 57753f127fSDimitry Andric struct __fn { 5806c3fb27SDimitry Andric template <permutable _Iter, 5906c3fb27SDimitry Andric sentinel_for<_Iter> _Sent, 60753f127fSDimitry Andric class _Proj = identity, 61753f127fSDimitry Andric indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> 62*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> 6306c3fb27SDimitry Andric operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const { 64753f127fSDimitry Andric return ranges::__remove_if_impl(std::move(__first), std::move(__last), __pred, __proj); 65753f127fSDimitry Andric } 66753f127fSDimitry Andric 67753f127fSDimitry Andric template <forward_range _Range, 68753f127fSDimitry Andric class _Proj = identity, 69753f127fSDimitry Andric indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 70753f127fSDimitry Andric requires permutable<iterator_t<_Range>> 71*0fca6ea1SDimitry Andric [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range> 7206c3fb27SDimitry Andric operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const { 73753f127fSDimitry Andric return ranges::__remove_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj); 74753f127fSDimitry Andric } 75753f127fSDimitry Andric }; 76753f127fSDimitry Andric } // namespace __remove_if 77753f127fSDimitry Andric 78753f127fSDimitry Andric inline namespace __cpo { 79753f127fSDimitry Andric inline constexpr auto remove_if = __remove_if::__fn{}; 80753f127fSDimitry Andric } // namespace __cpo 81753f127fSDimitry Andric } // namespace ranges 82753f127fSDimitry Andric 83753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD 84753f127fSDimitry Andric 8506c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 86753f127fSDimitry Andric 87b3edf446SDimitry Andric _LIBCPP_POP_MACROS 88b3edf446SDimitry Andric 89753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_IF_H 90