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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
// (C) Copyright Gennadiy Rozental 2001.
// Distributed under 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)
// See http://www.boost.org/libs/test for the library home page.
//
//! @file
//! Defines the is_forward_iterable collection type trait
// ***************************************************************************
#ifndef BOOST_TEST_UTILS_IS_FORWARD_ITERABLE_HPP
#define BOOST_TEST_UTILS_IS_FORWARD_ITERABLE_HPP
#if defined(BOOST_NO_CXX11_DECLTYPE) || \
defined(BOOST_NO_CXX11_NULLPTR) || \
defined(BOOST_NO_CXX11_TRAILING_RESULT_TYPES)
// some issues with boost.config
#if !defined(BOOST_MSVC) || BOOST_MSVC_FULL_VER < 170061030 /* VC2012 upd 5 */
#define BOOST_TEST_FWD_ITERABLE_CXX03
#endif
#endif
#if defined(BOOST_TEST_FWD_ITERABLE_CXX03)
// Boost
#include <boost/mpl/bool.hpp>
// STL
#include <list>
#include <vector>
#include <map>
#include <set>
#else
// Boost
#include <boost/utility/declval.hpp>
#include <boost/range.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/type_traits/remove_reference.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/test/utils/is_cstring.hpp>
// STL
#include <utility>
#include <type_traits>
#endif
//____________________________________________________________________________//
namespace boost {
namespace unit_test {
template<typename T>
struct is_forward_iterable;
// ************************************************************************** //
// ************** is_forward_iterable ************** //
// ************************************************************************** //
#if defined(BOOST_TEST_FWD_ITERABLE_CXX03) && !defined(BOOST_TEST_DOXYGEN_DOC__)
template<typename T>
struct is_forward_iterable : public mpl::false_ {};
template<typename T>
struct is_forward_iterable<T const> : public is_forward_iterable<T> {};
template<typename T>
struct is_forward_iterable<T&> : public is_forward_iterable<T> {};
template<typename T, std::size_t N>
struct is_forward_iterable< T [N] > : public mpl::true_ {};
template<typename T, typename A>
struct is_forward_iterable< std::vector<T, A> > : public mpl::true_ {};
template<typename T, typename A>
struct is_forward_iterable< std::list<T, A> > : public mpl::true_ {};
template<typename K, typename V, typename C, typename A>
struct is_forward_iterable< std::map<K, V, C, A> > : public mpl::true_ {};
template<typename K, typename C, typename A>
struct is_forward_iterable< std::set<K, C, A> > : public mpl::true_ {};
// string is also forward iterable, even if sometimes we want to treat the
// assertions differently.
template<>
struct is_forward_iterable< std::string > : public mpl::true_ {};
#else
namespace ut_detail {
// SFINAE helper
template<typename T>
struct is_present : public mpl::true_ {};
//____________________________________________________________________________//
// some compiler do not implement properly decltype non expression involving members (eg. VS2013)
// a workaround is to use -> decltype syntax.
template <class T>
struct has_member_size {
private:
struct nil_t {};
template<typename U> static auto test( U* ) -> decltype(boost::declval<U>().size());
template<typename> static nil_t test( ... );
public:
static bool const value = !std::is_same< decltype(test<T>( nullptr )), nil_t>::value;
};
//____________________________________________________________________________//
template <class T>
struct has_member_begin {
private:
struct nil_t {};
template<typename U> static auto test( U* ) -> decltype(std::begin(boost::declval<U&>())); // does not work with boost::begin
template<typename> static nil_t test( ... );
public:
static bool const value = !std::is_same< decltype(test<T>( nullptr )), nil_t>::value;
};
//____________________________________________________________________________//
template <class T>
struct has_member_end {
private:
struct nil_t {};
template<typename U> static auto test( U* ) -> decltype(std::end(boost::declval<U&>())); // does not work with boost::end
template<typename> static nil_t test( ... );
public:
static bool const value = !std::is_same< decltype(test<T>( nullptr )), nil_t>::value;
};
//____________________________________________________________________________//
template <class T, class enabled = void>
struct is_forward_iterable_impl : std::false_type {
};
template <class T>
struct is_forward_iterable_impl<
T,
typename std::enable_if<
has_member_begin<T>::value &&
has_member_end<T>::value
>::type
> : std::true_type
{};
//____________________________________________________________________________//
template <class T, class enabled = void>
struct is_container_forward_iterable_impl : std::false_type {
};
template <class T>
struct is_container_forward_iterable_impl<
T,
typename std::enable_if<
is_present<typename T::const_iterator>::value &&
is_present<typename T::value_type>::value &&
has_member_size<T>::value &&
is_forward_iterable_impl<T>::value
>::type
> : is_forward_iterable_impl<T>
{};
//____________________________________________________________________________//
} // namespace ut_detail
/*! Indicates that a specific type implements the forward iterable concept. */
template<typename T>
struct is_forward_iterable {
typedef typename std::remove_reference<T>::type T_ref;
typedef ut_detail::is_forward_iterable_impl<T_ref> is_fwd_it_t;
typedef mpl::bool_<is_fwd_it_t::value> type;
enum { value = is_fwd_it_t::value };
};
/*! Indicates that a specific type implements the forward iterable concept. */
template<typename T>
struct is_container_forward_iterable {
typedef typename std::remove_reference<T>::type T_ref;
typedef ut_detail::is_container_forward_iterable_impl<T_ref> is_fwd_it_t;
typedef mpl::bool_<is_fwd_it_t::value> type;
enum { value = is_fwd_it_t::value };
};
#endif /* defined(BOOST_TEST_FWD_ITERABLE_CXX03) */
template <typename T, bool is_forward_iterable = is_forward_iterable<T>::value >
struct bt_iterator_traits;
template <typename T>
struct bt_iterator_traits< T, true >{
BOOST_STATIC_ASSERT((is_forward_iterable<T>::value)); //, "only for forward iterable types");
typedef typename T::const_iterator const_iterator;
typedef typename T::value_type value_type;
static const_iterator begin(T const& container) {
return container.begin();
}
static const_iterator end(T const& container) {
return container.end();
}
static std::size_t size(T const& container) {
return container.size();
}
};
template <typename T, std::size_t N>
struct bt_iterator_traits< T [N], true > {
typedef typename boost::add_const<T>::type T_const;
typedef typename boost::add_pointer<T_const>::type const_iterator;
typedef T value_type;
static const_iterator begin(T_const (&array)[N]) {
return &array[0];
}
static const_iterator end(T_const (&array)[N]) {
return &array[N];
}
static std::size_t size(T_const (&)[N]) {
return N;
}
};
} // namespace unit_test
} // namespace boost
#endif // BOOST_TEST_UTILS_IS_FORWARD_ITERABLE_HPP
|
