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 #if _LIBCPP_STD_VER > 17 && !defined (_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 27 28 _LIBCPP_BEGIN_NAMESPACE_STD 29 30 namespace ranges { 31 32 template <class _Iter, class _Sent, class _Type, class _Proj, class _Pred> 33 _LIBCPP_HIDE_FROM_ABI constexpr 34 _Iter __replace_if_impl(_Iter __first, _Sent __last, _Pred& __pred, const _Type& __new_value, _Proj& __proj) { 35 for (; __first != __last; ++__first) { 36 if (std::invoke(__pred, std::invoke(__proj, *__first))) 37 *__first = __new_value; 38 } 39 return __first; 40 } 41 42 namespace __replace_if { 43 struct __fn { 44 45 template <input_iterator _Iter, sentinel_for<_Iter> _Sent, 46 class _Type, 47 class _Proj = identity, 48 indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> 49 requires indirectly_writable<_Iter, const _Type&> 50 _LIBCPP_HIDE_FROM_ABI constexpr 51 _Iter operator()(_Iter __first, _Sent __last, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const { 52 return ranges::__replace_if_impl(std::move(__first), std::move(__last), __pred, __new_value, __proj); 53 } 54 55 template <input_range _Range, 56 class _Type, 57 class _Proj = identity, 58 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 59 requires indirectly_writable<iterator_t<_Range>, const _Type&> 60 _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> 61 operator()(_Range&& __range, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const { 62 return ranges::__replace_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __new_value, __proj); 63 } 64 65 }; 66 } // namespace __replace_if 67 68 inline namespace __cpo { 69 inline constexpr auto replace_if = __replace_if::__fn{}; 70 } // namespace __cpo 71 } // namespace ranges 72 73 _LIBCPP_END_NAMESPACE_STD 74 75 #endif // _LIBCPP_STD_VER > 17 && !defined (_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 76 77 #endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_IF_H 78