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>
36constexpr _Iter __replace_if_impl(_Iter __first, _Sent __last, _Pred& __pred, const _Type& __new_value, _Proj& __proj) {
37 for (; __first != __last; ++__first) {
38 if (std::invoke(__pred, std::invoke(__proj, *__first)))
39 *__first = __new_value;
40 }
41 return __first;
42}
43
44struct __replace_if {
45 template <input_iterator _Iter,
46 sentinel_for<_Iter> _Sent,
47 class _Type,
48 class _Proj = identity,
49 indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
50 requires indirectly_writable<_Iter, const _Type&>
51 constexpr _Iter
52 operator()(_Iter __first, _Sent __last, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const {
53 return ranges::__replace_if_impl(std::move(__first), std::move(__last), __pred, __new_value, __proj);
54 }
55
56 template <input_range _Range,
57 class _Type,
58 class _Proj = identity,
59 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
60 requires indirectly_writable<iterator_t<_Range>, const _Type&>
61 constexpr borrowed_iterator_t<_Range>
62 operator()(_Range&& __range, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const {
63 return ranges::__replace_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __new_value, __proj);
64 }
65};
66
67inline namespace __cpo {
68inline constexpr auto replace_if = __replace_if{};
69} // namespace __cpo
70} // namespace ranges
71
72_LIBCPP_END_NAMESPACE_STD
73
74#endif // _LIBCPP_STD_VER >= 20
75
76_LIBCPP_POP_MACROS
77
78#endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_IF_H
79