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_IF_H 10 #define _LIBCPP___ALGORITHM_RANGES_REPLACE_IF_H 11 12 #include <__config> 13 #include <__functional/identity.h> 14 #include <__functional/invoke.h> 15 #include <__iterator/concepts.h> 16 #include <__iterator/projected.h> 17 #include <__ranges/access.h> 18 #include <__ranges/concepts.h> 19 #include <__ranges/dangling.h> 20 #include <__utility/move.h> 21 22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 23 # pragma GCC system_header 24 #endif 25 26 _LIBCPP_PUSH_MACROS 27 #include <__undef_macros> 28 29 #if _LIBCPP_STD_VER >= 20 30 31 _LIBCPP_BEGIN_NAMESPACE_STD 32 33 namespace ranges { 34 35 template <class _Iter, class _Sent, class _Type, class _Proj, class _Pred> 36 _LIBCPP_HIDE_FROM_ABI constexpr _Iter 37 __replace_if_impl(_Iter __first, _Sent __last, _Pred& __pred, const _Type& __new_value, _Proj& __proj) { 38 for (; __first != __last; ++__first) { 39 if (std::invoke(__pred, std::invoke(__proj, *__first))) 40 *__first = __new_value; 41 } 42 return __first; 43 } 44 45 struct __replace_if { 46 template <input_iterator _Iter, 47 sentinel_for<_Iter> _Sent, 48 class _Type, 49 class _Proj = identity, 50 indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> 51 requires indirectly_writable<_Iter, const _Type&> 52 _LIBCPP_HIDE_FROM_ABI constexpr _Iter 53 operator()(_Iter __first, _Sent __last, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const { 54 return ranges::__replace_if_impl(std::move(__first), std::move(__last), __pred, __new_value, __proj); 55 } 56 57 template <input_range _Range, 58 class _Type, 59 class _Proj = identity, 60 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 61 requires indirectly_writable<iterator_t<_Range>, const _Type&> 62 _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> 63 operator()(_Range&& __range, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const { 64 return ranges::__replace_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __new_value, __proj); 65 } 66 }; 67 68 inline namespace __cpo { 69 inline constexpr auto replace_if = __replace_if{}; 70 } // namespace __cpo 71 } // namespace ranges 72 73 _LIBCPP_END_NAMESPACE_STD 74 75 #endif // _LIBCPP_STD_VER >= 20 76 77 _LIBCPP_POP_MACROS 78 79 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_IF_H 80