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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/// \file
// Range v3 library
//
// Copyright Eric Niebler 2013-present
//
// Use, modification and distribution is subject to the
// Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// Project home: https://github.com/ericniebler/range-v3
//
#ifndef RANGES_V3_ITERATOR_TRAITS_HPP
#define RANGES_V3_ITERATOR_TRAITS_HPP
#include <iterator>
#include <type_traits>
#include <meta/meta.hpp>
#include <concepts/concepts.hpp>
#include <range/v3/range_fwd.hpp>
#include <range/v3/iterator/access.hpp> // for iter_move, iter_swap
#include <range/v3/utility/common_type.hpp>
#include <range/v3/detail/prologue.hpp>
namespace ranges
{
/// \addtogroup group-iterator
/// @{
/// \cond
using input_iterator_tag RANGES_DEPRECATED(
"Please switch to the standard iterator tags") = std::input_iterator_tag;
using forward_iterator_tag RANGES_DEPRECATED(
"Please switch to the standard iterator tags") = std::forward_iterator_tag;
using bidirectional_iterator_tag RANGES_DEPRECATED(
"Please switch to the standard iterator tags") = std::bidirectional_iterator_tag;
using random_access_iterator_tag RANGES_DEPRECATED(
"Please switch to the standard iterator tags") = std::random_access_iterator_tag;
/// \endcond
struct contiguous_iterator_tag : std::random_access_iterator_tag
{};
/// \cond
namespace detail
{
template<typename I, typename = iter_reference_t<I>,
typename R = decltype(iter_move(std::declval<I &>())), typename = R &>
using iter_rvalue_reference_t = R;
template<typename I>
RANGES_INLINE_VAR constexpr bool has_nothrow_iter_move_v =
noexcept(iter_rvalue_reference_t<I>(ranges::iter_move(std::declval<I &>())));
} // namespace detail
/// \endcond
template<typename I>
using iter_rvalue_reference_t = detail::iter_rvalue_reference_t<I>;
template<typename I>
using iter_common_reference_t =
common_reference_t<iter_reference_t<I>, iter_value_t<I> &>;
#if defined(RANGES_DEEP_STL_INTEGRATION) && RANGES_DEEP_STL_INTEGRATION && \
!defined(RANGES_DOXYGEN_INVOKED)
template<typename T>
using iter_difference_t =
typename meta::conditional_t<detail::is_std_iterator_traits_specialized_v<T>,
std::iterator_traits<uncvref_t<T>>,
incrementable_traits<uncvref_t<T>>>::difference_type;
#else
template<typename T>
using iter_difference_t =
typename incrementable_traits<uncvref_t<T>>::difference_type;
#endif
// Defined in <range/v3/iterator/access.hpp>
// template<typename T>
// using iter_value_t = ...
// Defined in <range/v3/iterator/access.hpp>
// template<typename R>
// using iter_reference_t = detail::iter_reference_t_<R>;
// Defined in <range/v3/range_fwd.hpp>:
// template<typename S, typename I>
// inline constexpr bool disable_sized_sentinel = false;
/// \cond
namespace detail
{
template<typename I>
using iter_size_t =
meta::_t<meta::conditional_t<std::is_integral<iter_difference_t<I>>::value,
std::make_unsigned<iter_difference_t<I>>,
meta::id<iter_difference_t<I>>>>;
template<typename I>
using iter_arrow_t = decltype(std::declval<I &>().operator->());
template<typename I>
using iter_pointer_t =
meta::_t<meta::conditional_t<
meta::is_trait<meta::defer<iter_arrow_t, I>>::value,
meta::defer<iter_arrow_t, I>,
std::add_pointer<iter_reference_t<I>>>>;
template<typename T>
struct difference_type_ : meta::defer<iter_difference_t, T>
{};
template<typename T>
struct value_type_ : meta::defer<iter_value_t, T>
{};
template<typename T>
struct size_type_ : meta::defer<iter_size_t, T>
{};
} // namespace detail
template<typename T>
using difference_type_t RANGES_DEPRECATED(
"ranges::difference_type_t is deprecated. Please use "
"ranges::iter_difference_t instead.") = iter_difference_t<T>;
template<typename T>
using value_type_t RANGES_DEPRECATED(
"ranges::value_type_t is deprecated. Please use "
"ranges::iter_value_t instead.") = iter_value_t<T>;
template<typename R>
using reference_t RANGES_DEPRECATED(
"ranges::reference_t is deprecated. Use ranges::iter_reference_t "
"instead.") = iter_reference_t<R>;
template<typename I>
using rvalue_reference_t RANGES_DEPRECATED(
"rvalue_reference_t is deprecated; "
"use iter_rvalue_reference_t instead") = iter_rvalue_reference_t<I>;
template<typename T>
struct RANGES_DEPRECATED(
"ranges::size_type is deprecated. Iterators do not have an associated "
"size_type.") size_type : detail::size_type_<T>
{};
template<typename I>
using size_type_t RANGES_DEPRECATED("size_type_t is deprecated.") =
detail::iter_size_t<I>;
/// \endcond
namespace cpp20
{
using ranges::iter_common_reference_t;
using ranges::iter_difference_t;
using ranges::iter_reference_t;
using ranges::iter_rvalue_reference_t;
using ranges::iter_value_t;
// Specialize these in the ranges:: namespace
using ranges::disable_sized_sentinel;
template<typename T>
using incrementable_traits = ranges::incrementable_traits<T>;
template<typename T>
using indirectly_readable_traits = ranges::indirectly_readable_traits<T>;
} // namespace cpp20
/// @}
} // namespace ranges
#include <range/v3/detail/epilogue.hpp>
#endif // RANGES_V3_ITERATOR_TRAITS_HPP
|
