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<div class="section" id="vector">
<h1><a class="toc-backref" href="./classes.html#id1406">vector</a></h1>
<div class="section" id="id51">
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
<p><tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> is a <a class="reference internal" href="./variadic-sequence.html">variadic</a>, <a class="reference internal" href="./random-access-sequence.html">random access</a>, <a class="reference internal" href="./extensible-sequence.html">extensible</a> sequence of types that
supports constant-time insertion and removal of elements at both ends, and
linear-time insertion and removal of elements in the middle. On compilers that
support the <tt class="literal"><span class="pre">typeof</span></tt> extension, <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> is the simplest and in many cases the
most efficient sequence.</p>
</div>
<div class="section" id="header">
<h3>Header</h3>
<table border="1" class="docutils table">
<colgroup>
<col width="26%" />
<col width="74%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">Sequence form</th>
<th class="head">Header</th>
</tr>
</thead>
<tbody valign="top">
<tr><td>Variadic</td>
<td><tt class="literal"><span class="pre">#include &lt;<a href="../../../../boost/mpl/vector.hpp" class="header">boost/mpl/vector.hpp</a>&gt;</span></tt></td>
</tr>
<tr><td>Numbered</td>
<td><tt class="literal"><span class="pre">#include &lt;boost/mpl/vector/vector</span></tt><em>n</em><tt class="literal"><span class="pre">.hpp&gt;</span></tt></td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="model-of">
<h3>Model of</h3>
<ul class="simple">
<li><a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a></li>
<li><a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a></li>
<li><a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a></li>
<li><a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a></li>
<li><a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a></li>
</ul>
</div>
<div class="section" id="id54">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>In the following table, <tt class="literal"><span class="pre">v</span></tt> is an instance of <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt>, <tt class="literal"><span class="pre">pos</span></tt> and <tt class="literal"><span class="pre">last</span></tt> are iterators
into <tt class="literal"><span class="pre">v</span></tt>, <tt class="literal"><span class="pre">r</span></tt> is a <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a>, <tt class="literal"><span class="pre">n</span></tt> is an <a class="reference internal" href="./integral-constant.html">Integral Constant</a>, and <tt class="literal"><span class="pre">x</span></tt> and
<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub> are arbitrary types.</p>
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<colgroup>
<col width="40%" />
<col width="60%" />
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<thead valign="bottom">
<tr><th class="head">Expression</th>
<th class="head">Semantics</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><pre class="first last literal-block">
<a href="./vector.html" class="identifier">vector</a>&lt;<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>&gt;
<a href="./vector.html" class="identifier">vector</a><em>n</em>&lt;<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>&gt;
</pre>
</td>
<td><tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of elements <em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>; see
<a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>.</td>
</tr>
<tr><td><pre class="first last literal-block">
<a href="./vector.html" class="identifier">vector</a>&lt;<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>&gt;::type
<a href="./vector.html" class="identifier">vector</a><em>n</em>&lt;<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>&gt;::type
</pre>
</td>
<td>Identical to <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt><em>n</em><tt class="literal"><span class="pre">&lt;</span></tt><em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub><tt class="literal"><span class="pre">&gt;</span></tt>;
see <a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt></td>
<td>An iterator pointing to the beginning of <tt class="literal"><span class="pre">v</span></tt>;
see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt></td>
<td>An iterator pointing to the end of <tt class="literal"><span class="pre">v</span></tt>;
see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;v&gt;::type</span></tt></td>
<td>The size of <tt class="literal"><span class="pre">v</span></tt>; see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./empty.html" class="identifier">empty</a>&lt;v&gt;::type</span></tt></td>
<td>A boolean <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">c</span></tt> such that
<tt class="literal"><span class="pre">c::value</span> <span class="pre">==</span> <span class="pre">true</span></tt> if and only if the sequence is empty;
see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a>&lt;v&gt;::type</span></tt></td>
<td>The first element in <tt class="literal"><span class="pre">v</span></tt>; see
<a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./back.html" class="identifier">back</a>&lt;v&gt;::type</span></tt></td>
<td>The last element in <tt class="literal"><span class="pre">v</span></tt>; see
<a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./at.html" class="identifier">at</a>&lt;v,n&gt;::type</span></tt></td>
<td>The <tt class="literal"><span class="pre">n</span></tt>th element from the beginning of <tt class="literal"><span class="pre">v</span></tt>; see
<a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a>&lt;v,pos,x&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), <tt class="literal"><span class="pre">x</span></tt>,
[<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./insert-range.html" class="identifier">insert_range</a>&lt;v,pos,r&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>),
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;r&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;r&gt;::type</span></tt>)
[<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a>&lt;v,pos&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>),
[<tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a>&lt;pos&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>); see
<a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a>&lt;v,pos,last&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>),
[<tt class="literal"><span class="pre">last</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./clear.html" class="identifier">clear</a>&lt;v&gt;::type</span></tt></td>
<td>An empty <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt>; see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./push-back.html" class="identifier">push_back</a>&lt;v,x&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>), <tt class="literal"><span class="pre">x</span></tt>;
see <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./pop-back.html" class="identifier">pop_back</a>&lt;v&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./prior.html" class="identifier">prior</a>&lt;</span> <span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span> <span class="pre">&gt;::type</span></tt>);
see <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./push-front.html" class="identifier">push_front</a>&lt;v,x&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
<tt class="literal"><span class="pre">x</span></tt>, [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>); see <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a>.</td>
</tr>
<tr><td><tt class="literal"><span class="pre"><a href="./pop-front.html" class="identifier">pop_front</a>&lt;v&gt;::type</span></tt></td>
<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
[<tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a>&lt;</span> <span class="pre"><a href="./begin.html" class="identifier">begin</a>&lt;v&gt;::type</span> <span class="pre">&gt;::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a>&lt;v&gt;::type</span></tt>);
see <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a>.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="example">
<h3>Example</h3>
<pre class="literal-block">
typedef <a href="./vector.html" class="identifier">vector</a>&lt;float,double,long double&gt; floats;
typedef <a href="./push-back.html" class="identifier">push_back</a>&lt;floats,int&gt;::type types;

<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same&lt; <a href="./at-c.html" class="identifier">at_c</a>&lt;types,3&gt;::type, int > ));
</pre>
</div>
<div class="section" id="id55">
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
<p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>, <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>, <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, <a class="reference internal" href="./vector-c.html">vector_c</a>, <a class="reference internal" href="./list.html">list</a></p>
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