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
34namespace ranges {
35
36template <class _InIter, class _OutIter>
37using replace_copy_if_result = in_out_result<_InIter, _OutIter>;
38
39template <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
55struct __replace_copy_if {
56  template <input_iterator _InIter,
57            sentinel_for<_InIter> _Sent,
58            class _Type,
59            output_iterator<const _Type&> _OutIter,
60            class _Proj = identity,
61            indirect_unary_predicate<projected<_InIter, _Proj>> _Pred>
62    requires indirectly_copyable<_InIter, _OutIter>
63  _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_if_result<_InIter, _OutIter> operator()(
64      _InIter __first, _Sent __last, _OutIter __result, _Pred __pred, const _Type& __new_value, _Proj __proj = {})
65      const {
66    return ranges::__replace_copy_if_impl(
67        std::move(__first), std::move(__last), std::move(__result), __pred, __new_value, __proj);
68  }
69
70  template <input_range _Range,
71            class _Type,
72            output_iterator<const _Type&> _OutIter,
73            class _Proj = identity,
74            indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
75    requires indirectly_copyable<iterator_t<_Range>, _OutIter>
76  _LIBCPP_HIDE_FROM_ABI constexpr replace_copy_if_result<borrowed_iterator_t<_Range>, _OutIter>
77  operator()(_Range&& __range, _OutIter __result, _Pred __pred, const _Type& __new_value, _Proj __proj = {}) const {
78    return ranges::__replace_copy_if_impl(
79        ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __new_value, __proj);
80  }
81};
82
83inline namespace __cpo {
84inline constexpr auto replace_copy_if = __replace_copy_if{};
85} // namespace __cpo
86} // namespace ranges
87
88_LIBCPP_END_NAMESPACE_STD
89
90#endif // _LIBCPP_STD_VER >= 20
91
92_LIBCPP_POP_MACROS
93
94#endif // _LIBCPP___ALGORITHM_RANGES_REPLACE_COPY_IF_H