xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_equal_range.h (revision 0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583)
1753f127fSDimitry Andric //===----------------------------------------------------------------------===//
2753f127fSDimitry Andric //
35f757f3fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6753f127fSDimitry Andric //
7753f127fSDimitry Andric //===----------------------------------------------------------------------===//
8753f127fSDimitry Andric 
9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H
10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H
11753f127fSDimitry Andric 
12753f127fSDimitry Andric #include <__algorithm/equal_range.h>
13fcaf7f86SDimitry Andric #include <__algorithm/iterator_operations.h>
14753f127fSDimitry Andric #include <__config>
15753f127fSDimitry Andric #include <__functional/identity.h>
16753f127fSDimitry Andric #include <__functional/invoke.h>
17753f127fSDimitry Andric #include <__functional/ranges_operations.h>
18753f127fSDimitry Andric #include <__iterator/concepts.h>
19753f127fSDimitry Andric #include <__iterator/iterator_traits.h>
20753f127fSDimitry Andric #include <__iterator/projected.h>
21753f127fSDimitry Andric #include <__ranges/access.h>
22753f127fSDimitry Andric #include <__ranges/concepts.h>
23753f127fSDimitry Andric #include <__ranges/dangling.h>
24753f127fSDimitry Andric #include <__ranges/subrange.h>
25753f127fSDimitry Andric #include <__utility/forward.h>
26753f127fSDimitry Andric #include <__utility/move.h>
27bdd1243dSDimitry Andric #include <__utility/pair.h>
28753f127fSDimitry Andric 
29753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
30753f127fSDimitry Andric #  pragma GCC system_header
31753f127fSDimitry Andric #endif
32753f127fSDimitry Andric 
33b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
34b3edf446SDimitry Andric #include <__undef_macros>
35b3edf446SDimitry Andric 
3606c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
37753f127fSDimitry Andric 
38753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
39753f127fSDimitry Andric 
40753f127fSDimitry Andric namespace ranges {
41753f127fSDimitry Andric namespace __equal_range {
42753f127fSDimitry Andric 
43753f127fSDimitry Andric struct __fn {
4406c3fb27SDimitry Andric   template <forward_iterator _Iter,
45fcaf7f86SDimitry Andric             sentinel_for<_Iter> _Sent,
46fcaf7f86SDimitry Andric             class _Tp,
47fcaf7f86SDimitry Andric             class _Proj                                                           = identity,
48753f127fSDimitry Andric             indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>> _Comp = ranges::less>
49*0fca6ea1SDimitry Andric   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
50fcaf7f86SDimitry Andric   operator()(_Iter __first, _Sent __last, const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const {
5106c3fb27SDimitry Andric     auto __ret = std::__equal_range<_RangeAlgPolicy>(std::move(__first), std::move(__last), __value, __comp, __proj);
52fcaf7f86SDimitry Andric     return {std::move(__ret.first), std::move(__ret.second)};
53753f127fSDimitry Andric   }
54753f127fSDimitry Andric 
5506c3fb27SDimitry Andric   template <forward_range _Range,
56fcaf7f86SDimitry Andric             class _Tp,
57fcaf7f86SDimitry Andric             class _Proj                                                                        = identity,
58753f127fSDimitry Andric             indirect_strict_weak_order<const _Tp*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
59*0fca6ea1SDimitry Andric   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
60fcaf7f86SDimitry Andric   operator()(_Range&& __range, const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const {
6106c3fb27SDimitry Andric     auto __ret =
6206c3fb27SDimitry Andric         std::__equal_range<_RangeAlgPolicy>(ranges::begin(__range), ranges::end(__range), __value, __comp, __proj);
63fcaf7f86SDimitry Andric     return {std::move(__ret.first), std::move(__ret.second)};
64753f127fSDimitry Andric   }
65753f127fSDimitry Andric };
66753f127fSDimitry Andric 
67753f127fSDimitry Andric } // namespace __equal_range
68753f127fSDimitry Andric 
69753f127fSDimitry Andric inline namespace __cpo {
70753f127fSDimitry Andric inline constexpr auto equal_range = __equal_range::__fn{};
71753f127fSDimitry Andric } // namespace __cpo
72753f127fSDimitry Andric } // namespace ranges
73753f127fSDimitry Andric 
74753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD
75753f127fSDimitry Andric 
7606c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
77753f127fSDimitry Andric 
78b3edf446SDimitry Andric _LIBCPP_POP_MACROS
79b3edf446SDimitry Andric 
80753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H
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