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_REPLACE_COPY_IF_H 10 #define _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_IF_H 11 12 #include <__algorithm/in_out_result.h> 13 #include <__config> 14 #include <__functional/identity.h> 15 #include <__functional/invoke.h> 16 #include <__iterator/concepts.h> 17 #include <__iterator/projected.h> 18 #include <__ranges/access.h> 19 #include <__ranges/concepts.h> 20 #include <__ranges/dangling.h> 21 #include <__utility/move.h> 22 23 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 24 # pragma GCC system_header 25 #endif 26 27 _LIBCPP_PUSH_MACROS 28 #include <__undef_macros> 29 30 #if _LIBCPP_STD_VER >= 20 31 32 _LIBCPP_BEGIN_NAMESPACE_STD 33 34 namespace ranges { 35 36 template <class _InIter, class _OutIter> 37 using replace_copy_if_result = in_out_result<_InIter, _OutIter>; 38 39 template <class _InIter, class _Sent, class _OutIter, class _Pred, class _Type, class _Proj> 40 _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_if_result<_InIter, _OutIter> __replace_copy_if_impl( 41 _InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, const _Type& __new_value, _Proj& __proj) { 42 while (__first != __last) { 43 if (std::invoke(__pred, std::invoke(__proj, *__first))) 44 *__result = __new_value; 45 else 46 *__result = *__first; 47 48 ++__first; 49 ++__result; 50 } 51 52 return {std::move(__first), std::move(__result)}; 53 } 54 55 namespace __replace_copy_if { 56 57 struct __fn { 58 template <input_iterator _InIter, 59 sentinel_for<_InIter> _Sent, 60 class _Type, 61 output_iterator<const _Type&> _OutIter, 62 class _Proj = identity, 63 indirect_unary_predicate<projected<_InIter, _Proj>> _Pred> 64 requires indirectly_copyable<_InIter, _OutIter> 65 _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_if_result<_InIter, _OutIter> operator()( 66 _InIter __first, _Sent __last, _OutIter __result, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) 67 const { 68 return ranges::__replace_copy_if_impl( 69 std::move(__first), std::move(__last), std::move(__result), __pred, __new_value, __proj); 70 } 71 72 template <input_range _Range, 73 class _Type, 74 output_iterator<const _Type&> _OutIter, 75 class _Proj = identity, 76 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 77 requires indirectly_copyable<iterator_t<_Range>, _OutIter> 78 _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_if_result<borrowed_iterator_t<_Range>, _OutIter> 79 operator()(_Range&& __range, _OutIter __result, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const { 80 return ranges::__replace_copy_if_impl( 81 ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __new_value, __proj); 82 } 83 }; 84 85 } // namespace __replace_copy_if 86 87 inline namespace __cpo { 88 inline constexpr auto replace_copy_if = __replace_copy_if::__fn{}; 89 } // namespace __cpo 90 } // namespace ranges 91 92 _LIBCPP_END_NAMESPACE_STD 93 94 #endif // _LIBCPP_STD_VER >= 20 95 96 _LIBCPP_POP_MACROS 97 98 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_IF_H 99