1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__algorithm/in_out_result.h> 13*4bdff4beSrobert #include <__config> 14*4bdff4beSrobert #include <__functional/identity.h> 15*4bdff4beSrobert #include <__functional/invoke.h> 16*4bdff4beSrobert #include <__iterator/concepts.h> 17*4bdff4beSrobert #include <__iterator/projected.h> 18*4bdff4beSrobert #include <__ranges/access.h> 19*4bdff4beSrobert #include <__ranges/concepts.h> 20*4bdff4beSrobert #include <__ranges/dangling.h> 21*4bdff4beSrobert #include <__utility/move.h> 22*4bdff4beSrobert 23*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24*4bdff4beSrobert # pragma GCC system_header 25*4bdff4beSrobert #endif 26*4bdff4beSrobert 27*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 28*4bdff4beSrobert 29*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 30*4bdff4beSrobert 31*4bdff4beSrobert namespace ranges { 32*4bdff4beSrobert 33*4bdff4beSrobert template<class _Ip, class _Op> 34*4bdff4beSrobert using copy_if_result = in_out_result<_Ip, _Op>; 35*4bdff4beSrobert 36*4bdff4beSrobert namespace __copy_if { 37*4bdff4beSrobert struct __fn { 38*4bdff4beSrobert 39*4bdff4beSrobert template <class _InIter, class _Sent, class _OutIter, class _Proj, class _Pred> 40*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI static constexpr 41*4bdff4beSrobert copy_if_result <_InIter, _OutIter> __copy_if_impl__fn42*4bdff4beSrobert __copy_if_impl(_InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, _Proj& __proj) { 43*4bdff4beSrobert for (; __first != __last; ++__first) { 44*4bdff4beSrobert if (std::invoke(__pred, std::invoke(__proj, *__first))) { 45*4bdff4beSrobert *__result = *__first; 46*4bdff4beSrobert ++__result; 47*4bdff4beSrobert } 48*4bdff4beSrobert } 49*4bdff4beSrobert return {std::move(__first), std::move(__result)}; 50*4bdff4beSrobert } 51*4bdff4beSrobert 52*4bdff4beSrobert template <input_iterator _Iter, sentinel_for<_Iter> _Sent, weakly_incrementable _OutIter, class _Proj = identity, 53*4bdff4beSrobert indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> 54*4bdff4beSrobert requires indirectly_copyable<_Iter, _OutIter> 55*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr 56*4bdff4beSrobert copy_if_result<_Iter, _OutIter> operator__fn57*4bdff4beSrobert operator()(_Iter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 58*4bdff4beSrobert return __copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj); 59*4bdff4beSrobert } 60*4bdff4beSrobert 61*4bdff4beSrobert template <input_range _Range, weakly_incrementable _OutIter, class _Proj = identity, 62*4bdff4beSrobert indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 63*4bdff4beSrobert requires indirectly_copyable<iterator_t<_Range>, _OutIter> 64*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr 65*4bdff4beSrobert copy_if_result<borrowed_iterator_t<_Range>, _OutIter> operator__fn66*4bdff4beSrobert operator()(_Range&& __r, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 67*4bdff4beSrobert return __copy_if_impl(ranges::begin(__r), ranges::end(__r), std::move(__result), __pred, __proj); 68*4bdff4beSrobert } 69*4bdff4beSrobert }; 70*4bdff4beSrobert } // namespace __copy_if 71*4bdff4beSrobert 72*4bdff4beSrobert inline namespace __cpo { 73*4bdff4beSrobert inline constexpr auto copy_if = __copy_if::__fn{}; 74*4bdff4beSrobert } // namespace __cpo 75*4bdff4beSrobert } // namespace ranges 76*4bdff4beSrobert 77*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 78*4bdff4beSrobert 79*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 80*4bdff4beSrobert 81*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 82