1 //===----------------------------------------------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 #ifndef _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H
10 #define _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H
12 #include <__algorithm/equal_range.h>
13 #include <__algorithm/iterator_operations.h>
15 #include <__functional/identity.h>
16 #include <__functional/invoke.h>
17 #include <__functional/ranges_operations.h>
18 #include <__iterator/concepts.h>
19 #include <__iterator/iterator_traits.h>
20 #include <__iterator/projected.h>
21 #include <__ranges/access.h>
22 #include <__ranges/concepts.h>
23 #include <__ranges/dangling.h>
24 #include <__ranges/subrange.h>
25 #include <__utility/forward.h>
26 #include <__utility/move.h>
27 #include <__utility/pair.h>
29 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
30 # pragma GCC system_header
34 #include <__undef_macros>
36 #if _LIBCPP_STD_VER >= 20
38 _LIBCPP_BEGIN_NAMESPACE_STD
41 struct __equal_range
{
42 template <forward_iterator _Iter
,
43 sentinel_for
<_Iter
> _Sent
,
45 class _Proj
= identity
,
46 indirect_strict_weak_order
<const _Tp
*, projected
<_Iter
, _Proj
>> _Comp
= ranges::less
>
47 [[nodiscard
]] _LIBCPP_HIDE_FROM_ABI
constexpr subrange
<_Iter
>
48 operator()(_Iter __first
, _Sent __last
, const _Tp
& __value
, _Comp __comp
= {}, _Proj __proj
= {}) const {
49 auto __ret
= std::__equal_range
<_RangeAlgPolicy
>(std::move(__first
), std::move(__last
), __value
, __comp
, __proj
);
50 return {std::move(__ret
.first
), std::move(__ret
.second
)};
53 template <forward_range _Range
,
55 class _Proj
= identity
,
56 indirect_strict_weak_order
<const _Tp
*, projected
<iterator_t
<_Range
>, _Proj
>> _Comp
= ranges::less
>
57 [[nodiscard
]] _LIBCPP_HIDE_FROM_ABI
constexpr borrowed_subrange_t
<_Range
>
58 operator()(_Range
&& __range
, const _Tp
& __value
, _Comp __comp
= {}, _Proj __proj
= {}) const {
60 std::__equal_range
<_RangeAlgPolicy
>(ranges::begin(__range
), ranges::end(__range
), __value
, __comp
, __proj
);
61 return {std::move(__ret
.first
), std::move(__ret
.second
)};
65 inline namespace __cpo
{
66 inline constexpr auto equal_range
= __equal_range
{};
70 _LIBCPP_END_NAMESPACE_STD
72 #endif // _LIBCPP_STD_VER >= 20
76 #endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H