-
Notifications
You must be signed in to change notification settings - Fork 67
/
CopyConstructible.html
185 lines (135 loc) · 4.05 KB
/
CopyConstructible.html
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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<title>Copy Constructible</title>
</head>
<body bgcolor="#FFFFFF" link="#0000EE" text="#000000" vlink="#551A8B" alink=
"#FF0000">
<img src="../../boost.png" alt="C++ Boost" width="277" height=
"86"><br clear="none">
<h1>Copy Constructible</h1>
<h3>Description</h3>
<p>A type is Copy Constructible if it is possible to copy objects of that
type.</p>
<h3>Notation</h3>
<table summary="">
<tr>
<td valign="top"><tt>T</tt></td>
<td valign="top">is type that is a model of Copy Constructible</td>
</tr>
<tr>
<td valign="top"><tt>t</tt></td>
<td valign="top">is an object of type <tt>T</tt></td>
</tr>
<tr>
<td valign="top"><tt>u</tt></td>
<td valign="top">is an object of type <tt>const T</tt></td>
</tr>
</table>
<h3>Definitions</h3>
<h3>Valid expressions</h3>
<table border summary="">
<tr>
<th>Name</th>
<th>Expression</th>
<th>Return type</th>
<th>Semantics</th>
</tr>
<tr>
<td valign="top">Copy constructor</td>
<td valign="top"><tt>T(t)</tt></td>
<td valign="top"><tt>T</tt></td>
<td valign="top"><tt>t</tt> is equivalent to <tt>T(t)</tt></td>
</tr>
<tr>
<td valign="top">Copy constructor</td>
<td valign="top">
<pre>
T(u)
</pre>
</td>
<td valign="top"><tt>T</tt></td>
<td valign="top"><tt>u</tt> is equivalent to <tt>T(u)</tt></td>
</tr>
<tr>
<td valign="top">Destructor</td>
<td valign="top">
<pre>
t.~T()
</pre>
</td>
<td valign="top"><tt>T</tt></td>
<td valign="top"> </td>
</tr>
<tr>
<td valign="top">Address Operator</td>
<td valign="top">
<pre>
&t
</pre>
</td>
<td valign="top"><tt>T*</tt></td>
<td valign="top">denotes the address of <tt>t</tt></td>
</tr>
<tr>
<td valign="top">Address Operator</td>
<td valign="top">
<pre>
&u
</pre>
</td>
<td valign="top"><tt>T*</tt></td>
<td valign="top">denotes the address of <tt>u</tt></td>
</tr>
</table>
<h3>Models</h3>
<ul>
<li><tt>int</tt></li>
<li><tt>std::pair</tt></li>
</ul>
<h3>Concept Checking Class</h3>
<pre>
template <class T>
struct CopyConstructibleConcept
{
void constraints() {
T a(b); // require copy constructor
T* ptr = &a; // require address of operator
const_constraints(a);
ignore_unused_variable_warning(ptr);
}
void const_constraints(const T& a) {
T c(a); // require const copy constructor
const T* ptr = &a; // require const address of operator
ignore_unused_variable_warning(c);
ignore_unused_variable_warning(ptr);
}
T b;
};
</pre>
<h3>See also</h3>
<p><a href="http://www.sgi.com/tech/stl/DefaultConstructible.html">Default
Constructible</a> and <a href="./Assignable.html">Assignable</a><br></p>
<hr>
<p><a href="http://validator.w3.org/check?uri=referer"><img border="0" src=
"../../doc/images/valid-html401.png" alt="Valid HTML 4.01 Transitional"
height="31" width="88"></a></p>
<p>Revised
<!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan -->05
December, 2006<!--webbot bot="Timestamp" endspan i-checksum="38516" --></p>
<table summary="">
<tr valign="top">
<td nowrap><i>Copyright © 2000</i></td>
<td><i><a href="http://www.lsc.nd.edu/~jsiek">Jeremy Siek</a>, Univ.of
Notre Dame (<a href=
"mailto:jsiek@lsc.nd.edu">jsiek@lsc.nd.edu</a>)</i></td>
</tr>
</table>
<p><i>Distributed under the Boost Software License, Version 1.0. (See
accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or
copy at <a href=
"http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</i></p>
</body>
</html>