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
|
//-----------------------------------------------------------------------------
// boost aligned_storage.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2002-2003
// Eric Friedman, Itay Maman
//
// 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)
#ifndef BOOST_ALIGNED_STORAGE_HPP
#define BOOST_ALIGNED_STORAGE_HPP
#include <cstddef> // for std::size_t
#include "boost/config.hpp"
#include "boost/detail/workaround.hpp"
#include "boost/type_traits/alignment_of.hpp"
#include "boost/type_traits/type_with_alignment.hpp"
#include "boost/type_traits/is_pod.hpp"
#include "boost/mpl/eval_if.hpp"
#include "boost/mpl/identity.hpp"
#include "boost/type_traits/detail/bool_trait_def.hpp"
namespace boost {
namespace detail { namespace aligned_storage {
BOOST_STATIC_CONSTANT(
std::size_t
, alignment_of_max_align = ::boost::alignment_of<max_align>::value
);
//
// To be TR1 conforming this must be a POD type:
//
template <
std::size_t size_
, std::size_t alignment_
>
struct aligned_storage_imp
{
union data_t
{
char buf[size_];
typename mpl::eval_if_c<
alignment_ == std::size_t(-1)
, mpl::identity<detail::max_align>
, type_with_alignment<alignment_>
>::type align_;
} data_;
};
}} // namespace detail::aligned_storage
template <
std::size_t size_
, std::size_t alignment_ = std::size_t(-1)
>
class aligned_storage
{
private: // representation
detail::aligned_storage::aligned_storage_imp<size_, alignment_> data_;
public: // constants
typedef detail::aligned_storage::aligned_storage_imp<size_, alignment_> type;
BOOST_STATIC_CONSTANT(
std::size_t
, size = size_
);
BOOST_STATIC_CONSTANT(
std::size_t
, alignment = (
alignment_ == std::size_t(-1)
? ::boost::detail::aligned_storage::alignment_of_max_align
: alignment_
)
);
#if defined(__GNUC__) &&\
(__GNUC__ > 3) ||\
(__GNUC__ == 3 && (__GNUC_MINOR__ > 2 ||\
(__GNUC_MINOR__ == 2 && __GNUC_PATCHLEVEL__ >=3)))
private: // noncopyable
aligned_storage(const aligned_storage&);
aligned_storage& operator=(const aligned_storage&);
#else // gcc less than 3.2.3
public: // _should_ be noncopyable, but GCC compiler emits error
aligned_storage(const aligned_storage&);
aligned_storage& operator=(const aligned_storage&);
#endif // gcc < 3.2.3 workaround
public: // structors
aligned_storage()
{
}
~aligned_storage()
{
}
public: // accessors
void* address()
{
return this;
}
#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
const void* address() const
{
return this;
}
#else // MSVC6
const void* address() const;
#endif // MSVC6 workaround
};
#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
// MSVC6 seems not to like inline functions with const void* returns, so we
// declare the following here:
template <std::size_t S, std::size_t A>
const void* aligned_storage<S,A>::address() const
{
return const_cast< aligned_storage<S,A>* >(this)->address();
}
#endif // MSVC6 workaround
#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
//
// Make sure that is_pod recognises aligned_storage<>::type
// as a POD (Note that aligned_storage<> itself is not a POD):
//
template <std::size_t size_, std::size_t alignment_>
struct is_pod<boost::detail::aligned_storage::aligned_storage_imp<size_,alignment_> >
BOOST_TT_AUX_BOOL_C_BASE(true)
{
BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(true)
};
#endif
} // namespace boost
#include "boost/type_traits/detail/bool_trait_undef.hpp"
#endif // BOOST_ALIGNED_STORAGE_HPP
|
Swift