blob: 87df1d18baf8a38cca501c6cad942ff0731a3ade (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___RANGES_CONCEPTS_H
#define _LIBCPP___RANGES_CONCEPTS_H
#include <__concepts/constructible.h>
#include <__concepts/movable.h>
#include <__concepts/same_as.h>
#include <__config>
#include <__iterator/concepts.h>
#include <__iterator/incrementable_traits.h>
#include <__iterator/iter_move.h>
#include <__iterator/iterator_traits.h>
#include <__iterator/readable_traits.h>
#include <__ranges/access.h>
#include <__ranges/data.h>
#include <__ranges/enable_borrowed_range.h>
#include <__ranges/enable_view.h>
#include <__ranges/size.h>
#include <initializer_list>
#include <type_traits>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER > 17
namespace ranges {
// [range.range]
template <class _Tp>
concept range = requires(_Tp& __t) {
ranges::begin(__t); // sometimes equality-preserving
ranges::end(__t);
};
template <class _Tp>
concept input_range = range<_Tp> && input_iterator<iterator_t<_Tp>>;
template<class _Range>
concept borrowed_range = range<_Range> &&
(is_lvalue_reference_v<_Range> || enable_borrowed_range<remove_cvref_t<_Range>>);
// `iterator_t` defined in <__ranges/access.h>
template <range _Rp>
using sentinel_t = decltype(ranges::end(declval<_Rp&>()));
template <range _Rp>
using range_difference_t = iter_difference_t<iterator_t<_Rp>>;
template <range _Rp>
using range_value_t = iter_value_t<iterator_t<_Rp>>;
template <range _Rp>
using range_reference_t = iter_reference_t<iterator_t<_Rp>>;
template <range _Rp>
using range_rvalue_reference_t = iter_rvalue_reference_t<iterator_t<_Rp>>;
// [range.sized]
template <class _Tp>
concept sized_range = range<_Tp> && requires(_Tp& __t) { ranges::size(__t); };
template<sized_range _Rp>
using range_size_t = decltype(ranges::size(declval<_Rp&>()));
// `disable_sized_range` defined in `<__ranges/size.h>`
// [range.view], views
// `enable_view` defined in <__ranges/enable_view.h>
// `view_base` defined in <__ranges/enable_view.h>
template <class _Tp>
concept view =
range<_Tp> &&
movable<_Tp> &&
enable_view<_Tp>;
template <class _Range>
concept __simple_view =
view<_Range> && range<const _Range> &&
same_as<iterator_t<_Range>, iterator_t<const _Range>> &&
same_as<sentinel_t<_Range>, sentinel_t<const _Range>>;
// [range.refinements], other range refinements
template <class _Rp, class _Tp>
concept output_range = range<_Rp> && output_iterator<iterator_t<_Rp>, _Tp>;
template <class _Tp>
concept forward_range = input_range<_Tp> && forward_iterator<iterator_t<_Tp>>;
template <class _Tp>
concept bidirectional_range = forward_range<_Tp> && bidirectional_iterator<iterator_t<_Tp>>;
template <class _Tp>
concept random_access_range =
bidirectional_range<_Tp> && random_access_iterator<iterator_t<_Tp>>;
template<class _Tp>
concept contiguous_range =
random_access_range<_Tp> &&
contiguous_iterator<iterator_t<_Tp>> &&
requires(_Tp& __t) {
{ ranges::data(__t) } -> same_as<add_pointer_t<range_reference_t<_Tp>>>;
};
template <class _Tp>
concept common_range = range<_Tp> && same_as<iterator_t<_Tp>, sentinel_t<_Tp>>;
template <class _Tp>
inline constexpr bool __is_std_initializer_list = false;
template <class _Ep>
inline constexpr bool __is_std_initializer_list<initializer_list<_Ep>> = true;
template <class _Tp>
concept viewable_range =
range<_Tp> &&
((view<remove_cvref_t<_Tp>> && constructible_from<remove_cvref_t<_Tp>, _Tp>) ||
(!view<remove_cvref_t<_Tp>> &&
(is_lvalue_reference_v<_Tp> ||
(movable<remove_reference_t<_Tp>> && !__is_std_initializer_list<remove_cvref_t<_Tp>>))));
} // namespace ranges
#endif // _LIBCPP_STD_VER > 17
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___RANGES_CONCEPTS_H
|
