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
|
// -*- C++ -*-
// Copyright (C) 2005, 2006 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 2, or (at your option) any later
// version.
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING. If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.
// As a special exception, you may use this file as part of a free
// software library without restriction. Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to
// produce an executable, this file does not by itself cause the
// resulting executable to be covered by the GNU General Public
// License. This exception does not however invalidate any other
// reasons why the executable file might be covered by the GNU General
// Public License.
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied
// warranty.
/**
* @file type_utils.hpp
* Contains utilities for handnling types. All of these classes are based on
* "Modern C++" by Andrei Alxandrescu.
*/
#ifndef PB_DS_TYPE_UTILS_HPP
#define PB_DS_TYPE_UTILS_HPP
#include <cstddef>
#include <utility>
#include <tr1/type_traits>
namespace pb_ds
{
namespace detail
{
using std::tr1::is_same;
using std::tr1::is_const;
using std::tr1::is_pointer;
using std::tr1::is_reference;
using std::tr1::is_fundamental;
using std::tr1::is_member_object_pointer;
using std::tr1::is_member_pointer;
using std::tr1::is_base_of;
using std::tr1::remove_const;
using std::tr1::remove_reference;
// Need integral_const<bool, true> <-> integral_const<int, 1>, so
// because of this use the following typedefs instead of importing
// std::tr1's.
using std::tr1::integral_constant;
typedef std::tr1::integral_constant<int, 1> true_type;
typedef std::tr1::integral_constant<int, 0> false_type;
template<typename T>
struct is_const_pointer
{
enum
{
value = is_const<T>::value && is_pointer<T>::value
};
};
template<typename T>
struct is_const_reference
{
enum
{
value = is_const<T>::value && is_reference<T>::value
};
};
template<typename T>
struct is_simple
{
enum
{
value = is_fundamental<typename remove_const<T>::type>::value
|| is_pointer<typename remove_const<T>::type>::value
|| is_member_pointer<T>::value
};
};
template<typename T>
class is_pair
{
private:
template<typename U>
struct is_pair_imp
{
enum
{
value = 0
};
};
template<typename U, typename V>
struct is_pair_imp<std::pair<U,V> >
{
enum
{
value = 1
};
};
public:
enum
{
value = is_pair_imp<T>::value
};
};
template<bool>
struct static_assert;
template<>
struct static_assert<true>
{ };
template<int>
struct static_assert_dumclass
{
enum
{
v = 1
};
};
template<typename Type>
struct type_to_type
{
typedef Type type;
};
template<bool Cond, class A, class B>
struct conditional_type;
template<typename A, class B>
struct conditional_type<true, A, B>
{
typedef A type;
};
template<typename A, class B>
struct conditional_type<false, A, B>
{
typedef B type;
};
#define __glibcxx_signed(T) ((T)(-1) < 0)
#define __glibcxx_min(T) \
(__glibcxx_signed (T) ? (T)1 << __glibcxx_digits (T) : (T)0)
#define __glibcxx_max(T) \
(__glibcxx_signed (T) ? ((T)1 << __glibcxx_digits (T)) - 1 : ~(T)0)
#define __glibcxx_digits(T) \
(sizeof(T) * __CHAR_BIT__ - __glibcxx_signed (T))
template<typename Value>
struct numeric_traits
{
typedef Value value_type;
static const value_type min = __glibcxx_min(value_type);
static const value_type max = __glibcxx_max(value_type);
};
template<typename Value>
const Value numeric_traits<Value>::min;
template<typename Value>
const Value numeric_traits<Value>::max;
} // namespace detail
} // namespace pb_ds
#endif
|
