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7<title>The MPL Reference Manual: push_back</title>
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10<body class="docframe refmanual">
11<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./pop-front.html" class="navigation-link">Prev</a>&nbsp;<a href="./push-front.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./pop-front.html" class="navigation-link">Back</a>&nbsp;<a href="./push-front.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./intrinsic-metafunctions.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
12<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./intrinsic-metafunctions.html" class="navigation-link">Intrinsic Metafunctions</a> / <a href="./push-back.html" class="navigation-link">push_back</a></td>
13</tr></table><div class="header-separator"></div>
14<div class="section" id="push-back">
15<h1><a class="toc-backref" href="./intrinsic-metafunctions.html#id371" name="push-back">push_back</a></h1>
16<div class="section" id="push-synopsis">
17<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
18<pre class="literal-block">
19template&lt;
20      typename Sequence
21    , typename T
22    &gt;
23struct <a href="./push-back.html" class="identifier">push_back</a>
24{
25    typedef <em>unspecified</em> type;
26};
27</pre>
28</div>
29<div class="section" id="push-description">
30<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
31<p><tt class="literal"><span class="pre"><a href="./push-back.html" class="identifier">push_back</a></span></tt> performs an insertion at the end of the sequence with guaranteed <em>O(1)</em>
32complexity.</p>
33</div>
34<div class="section" id="push-header">
35<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
36<pre class="literal-block">
37#include &lt;<a href="../../../../boost/mpl/push_back.hpp" class="header">boost/mpl/push_back.hpp</a>&gt;
38</pre>
39</div>
40<div class="section" id="push-model-of">
41<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
42<p><a class="reference" href="./tag-dispatched.html">Tag Dispatched Metafunction</a></p>
43</div>
44<div class="section" id="push-parameters">
45<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
46<table border="1" class="table">
47<colgroup>
48<col width="16%" />
49<col width="33%" />
50<col width="51%" />
51</colgroup>
52<thead valign="bottom">
53<tr><th>Parameter</th>
54<th>Requirement</th>
55<th>Description</th>
56</tr>
57</thead>
58<tbody valign="top">
59<tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td>
60<td><a class="reference" href="./back-extensible-sequence.html">Back Extensible Sequence</a></td>
61<td>A sequence to insert into.</td>
62</tr>
63<tr><td><tt class="literal"><span class="pre">T</span></tt></td>
64<td>Any type</td>
65<td>The element to be inserted.</td>
66</tr>
67</tbody>
68</table>
69</div>
70<div class="section" id="push-expression-semantics">
71<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
72<p>For any <a class="reference" href="./back-extensible-sequence.html">Back Extensible Sequence</a> <tt class="literal"><span class="pre">s</span></tt> and arbitrary type <tt class="literal"><span class="pre">x</span></tt>:</p>
73<pre class="literal-block">
74typedef <a href="./push-back.html" class="identifier">push_back</a>&lt;s,x&gt;::type r;
75</pre>
76<table class="field-list" frame="void" rules="none">
77<col class="field-name" />
78<col class="field-body" />
79<tbody valign="top">
80<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><a class="reference" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td>
81</tr>
82<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
83<pre class="last literal-block">
84typedef <a href="./insert.html" class="identifier">insert</a>&lt; s,<a href="./end.html" class="identifier">end</a>&lt;s&gt;::type,x &gt;::type r;
85</pre>
86</td>
87</tr>
88<tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first"><tt class="literal"><span class="pre"><a href="./back.html" class="identifier">back</a>&lt;r&gt;::type</span></tt> is identical to <tt class="literal"><span class="pre">x</span></tt>;</p>
89<pre class="last literal-block">
90<a href="./size.html" class="identifier">size</a>&lt;r&gt;::value == <a href="./size.html" class="identifier">size</a>&lt;s&gt;::value + 1
91</pre>
92</td>
93</tr>
94</tbody>
95</table>
96</div>
97<div class="section" id="push-complexity">
98<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
99<p>Amortized constant time.</p>
100</div>
101<div class="section" id="push-example">
102<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
103<pre class="literal-block">
104typedef <a href="./vector-c.html" class="identifier">vector_c</a>&lt;bool,false,false,false,
105    true,true,true,false,false&gt; bools;
106
107typedef <a href="./push-back.html" class="identifier">push_back</a>&lt;bools,false_&gt;::type message;
108
109<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( <a href="./back.html" class="identifier">back</a>&lt;message&gt;::type::value, ==, false );
110<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>(
111      ( <a href="./count-if.html" class="identifier">count_if</a>&lt;message, <a href="./equal-to.html" class="identifier">equal_to</a>&lt;_1,false_&gt; &gt;::value ), ==, 6
112    );
113</pre>
114</div>
115<div class="section" id="push-see-also">
116<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
117<p><a class="reference" href="./back-extensible-sequence.html">Back Extensible Sequence</a>, <a class="refentry reference" href="./insert.html"><tt class="refentry literal"><span class="pre">insert</span></tt></a>, <a class="refentry reference" href="./pop-back.html"><tt class="refentry literal"><span class="pre">pop_back</span></tt></a>, <a class="refentry reference" href="./back.html"><tt class="refentry literal"><span class="pre">back</span></tt></a>, <a class="refentry reference" href="./push-front.html"><tt class="refentry literal"><span class="pre">push_front</span></tt></a></p>
118<!-- modtime: November 13, 2004 01:31:27 +0000 -->
119<!-- Sequences/Intrinsic Metafunctions//push_front -->
120</div>
121</div>
122
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