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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 10 #define _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 11 12 #include <__algorithm/copy_if.h> 13 #include <__algorithm/in_out_result.h> 14 #include <__config> 15 #include <__functional/identity.h> 16 #include <__functional/invoke.h> 17 #include <__iterator/concepts.h> 18 #include <__iterator/projected.h> 19 #include <__ranges/access.h> 20 #include <__ranges/concepts.h> 21 #include <__ranges/dangling.h> 22 #include <__utility/move.h> 23 24 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25 # pragma GCC system_header 26 #endif 27 28 _LIBCPP_PUSH_MACROS 29 #include <__undef_macros> 30 31 #if _LIBCPP_STD_VER >= 20 32 33 _LIBCPP_BEGIN_NAMESPACE_STD 34 35 namespace ranges { 36 37 template <class _Ip, class _Op> 38 using copy_if_result = in_out_result<_Ip, _Op>; 39 40 struct __copy_if { 41 template <input_iterator _Iter, 42 sentinel_for<_Iter> _Sent, 43 weakly_incrementable _OutIter, 44 class _Proj = identity, 45 indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> 46 requires indirectly_copyable<_Iter, _OutIter> 47 _LIBCPP_HIDE_FROM_ABI constexpr copy_if_result<_Iter, _OutIter> 48 operator()(_Iter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 49 auto __res = std::__copy_if(std::move(__first), std::move(__last), std::move(__result), __pred, __proj); 50 return {std::move(__res.first), std::move(__res.second)}; 51 } 52 53 template <input_range _Range, 54 weakly_incrementable _OutIter, 55 class _Proj = identity, 56 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 57 requires indirectly_copyable<iterator_t<_Range>, _OutIter> 58 _LIBCPP_HIDE_FROM_ABI constexpr copy_if_result<borrowed_iterator_t<_Range>, _OutIter> 59 operator()(_Range&& __r, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 60 auto __res = std::__copy_if(ranges::begin(__r), ranges::end(__r), std::move(__result), __pred, __proj); 61 return {std::move(__res.first), std::move(__res.second)}; 62 } 63 }; 64 65 inline namespace __cpo { 66 inline constexpr auto copy_if = __copy_if{}; 67 } // namespace __cpo 68 } // namespace ranges 69 70 _LIBCPP_END_NAMESPACE_STD 71 72 #endif // _LIBCPP_STD_VER >= 20 73 74 _LIBCPP_POP_MACROS 75 76 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 77