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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
33namespace ranges {
34
35template <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
45struct __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
68inline namespace __cpo {
69inline 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

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source code of libcxx/include/__algorithm/ranges_replace_if.h