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
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>operator[]</title>
<link rel="stylesheet" href="apiReference.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
<link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" />
<link rel="up" href="db_vector.html" title="Chapter 4. Db_vector" />
<link rel="prev" href="stldb_vectorcapacity.html" title="capacity" />
<link rel="next" href="stldb_vectorat.html" title="at" />
</head>
<body>
<div xmlns="" class="navheader">
<div class="libver">
<p>Library Version 11.2.5.3</p>
</div>
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">operator[]</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="stldb_vectorcapacity.html">Prev</a> </td>
<th width="60%" align="center">Chapter 4.
Db_vector </th>
<td width="20%" align="right"> <a accesskey="n" href="stldb_vectorat.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="sect1" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h2 class="title" style="clear: both"><a id="stldb_vectoroperator_sqbrk"></a>operator[]</h2>
</div>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="stldb_vectoroperator_sqbrk_details"></a>Function Details</h3>
</div>
</div>
</div>
<pre class="programlisting">
reference operator[](index_type n)
</pre>
<p>Index operator, can act as both a left value and a right value. </p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp50169920"></a>Parameters</h4>
</div>
</div>
</div>
<div class="sect4" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h5 class="title"><a id="idp50179256"></a>n</h5>
</div>
</div>
</div>
<p>The valid index of the vector. </p>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp50176272"></a>Return Value</h4>
</div>
</div>
</div>
<p>The reference to the element at specified position. </p>
</div>
<pre class="programlisting">
const_reference operator[](index_type n) const
</pre>
<p>Read only index operator. </p>
<p>Only used as a right value, no need for assignment capability. The return value can't be used to update the element. </p>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp50182088"></a>Parameters</h4>
</div>
</div>
</div>
<div class="sect4" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h5 class="title"><a id="idp50182280"></a>n</h5>
</div>
</div>
</div>
<p>The valid index of the vector. </p>
</div>
</div>
<div class="sect3" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h4 class="title"><a id="idp50176792"></a>Return Value</h4>
</div>
</div>
</div>
<p>The const reference to the element at specified position. </p>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp50168832"></a>Group: Element access functions.</h3>
</div>
</div>
</div>
<p>The operator[] and <a class="link" href="stldb_vectorat.html" title="at">at()</a>
only come from std::vector and std::deque, If you are using <a class="link" href="db_vector.html" title="Chapter 4. Db_vector">db_vector</a>
as std::list, you don't have to set DB_RENUMBER flag to the backing database handle, and you get better performance, but at the same time you can't use these functions.</p>
<p>Otherwise if you have set the DB_RENUMBER flag to the backing database handle, you can use this function though it is an std::list equivalent. </p>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<div>
<div>
<h3 class="title"><a id="idp50169192"></a>Class</h3>
</div>
</div>
</div>
<p>
<a class="link" href="db_vector.html" title="Chapter 4. Db_vector">db_vector</a>
</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="stldb_vectorcapacity.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="db_vector.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="stldb_vectorat.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">capacity </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> at</td>
</tr>
</table>
</div>
</body>
</html>
|
