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<title>The MPL Reference Manual: vector</title>
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<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="./classes.html" class="navigation-link">Classes</a> / <a href="./vector.html" class="navigation-link">vector</a></td>
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<div class="section" id="vector">
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<h1><a class="toc-backref" href="./classes.html#id1406">vector</a></h1>
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<div class="section" id="id51">
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<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
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<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
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supports constant-time insertion and removal of elements at both ends, and
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linear-time insertion and removal of elements in the middle. On compilers that
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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
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most efficient sequence.</p>
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</div>
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<div class="section" id="header">
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<h3>Header</h3>
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<table border="1" class="docutils table">
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<tr><th class="head">Sequence form</th>
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<th class="head">Header</th>
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</thead>
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<tbody valign="top">
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<tr><td>Variadic</td>
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<td><tt class="literal"><span class="pre">#include <<a href="../../../../boost/mpl/vector.hpp" class="header">boost/mpl/vector.hpp</a>></span></tt></td>
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</tr>
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<tr><td>Numbered</td>
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<td><tt class="literal"><span class="pre">#include <boost/mpl/vector/vector</span></tt><em>n</em><tt class="literal"><span class="pre">.hpp></span></tt></td>
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<div class="section" id="model-of">
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<h3>Model of</h3>
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<ul class="simple">
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<li><a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a></li>
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<li><a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a></li>
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<li><a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a></li>
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<li><a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a></li>
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<li><a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a></li>
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</ul>
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</div>
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<div class="section" id="id54">
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<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
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<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
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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
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<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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<thead valign="bottom">
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<tr><th class="head">Expression</th>
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<th class="head">Semantics</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><pre class="first last literal-block">
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<a href="./vector.html" class="identifier">vector</a><<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>>
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<a href="./vector.html" class="identifier">vector</a><em>n</em><<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>>
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</pre>
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</td>
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<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
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<a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>.</td>
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</tr>
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<tr><td><pre class="first last literal-block">
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<a href="./vector.html" class="identifier">vector</a><<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>>::type
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<a href="./vector.html" class="identifier">vector</a><em>n</em><<em>t</em><sub>1</sub>,<em>t</em><sub>2</sub>,... <em>t</em><sub>n</sub>>::type
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</pre>
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</td>
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<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"><</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">></span></tt>;
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see <a class="reference internal" href="./variadic-sequence.html">Variadic Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt></td>
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<td>An iterator pointing to the beginning of <tt class="literal"><span class="pre">v</span></tt>;
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see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt></td>
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<td>An iterator pointing to the end of <tt class="literal"><span class="pre">v</span></tt>;
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see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><v>::type</span></tt></td>
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<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>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./empty.html" class="identifier">empty</a><v>::type</span></tt></td>
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<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
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<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;
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see <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./front.html" class="identifier">front</a><v>::type</span></tt></td>
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<td>The first element in <tt class="literal"><span class="pre">v</span></tt>; see
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<a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./back.html" class="identifier">back</a><v>::type</span></tt></td>
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<td>The last element in <tt class="literal"><span class="pre">v</span></tt>; see
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<a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./at.html" class="identifier">at</a><v,n>::type</span></tt></td>
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<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
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<a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><v,pos,x>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>), <tt class="literal"><span class="pre">x</span></tt>,
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[<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./insert-range.html" class="identifier">insert_range</a><v,pos,r>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>),
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><r>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><r>::type</span></tt>)
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[<tt class="literal"><span class="pre">pos</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><v,pos>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>),
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[<tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a><pos>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>); see
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<a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><v,pos,last>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre">pos</span></tt>),
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[<tt class="literal"><span class="pre">last</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>); see <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./clear.html" class="identifier">clear</a><v>::type</span></tt></td>
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<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>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./push-back.html" class="identifier">push_back</a><v,x>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>), <tt class="literal"><span class="pre">x</span></tt>;
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see <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./pop-back.html" class="identifier">pop_back</a><v>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./prior.html" class="identifier">prior</a><</span> <span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span> <span class="pre">>::type</span></tt>);
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see <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./push-front.html" class="identifier">push_front</a><v,x>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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<tt class="literal"><span class="pre">x</span></tt>, [<tt class="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>); see <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./pop-front.html" class="identifier">pop_front</a><v>::type</span></tt></td>
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<td>A new <tt class="literal"><span class="pre"><a href="./vector.html" class="identifier">vector</a></span></tt> of following elements:
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[<tt class="literal"><span class="pre"><a href="./next.html" class="identifier">next</a><</span> <span class="pre"><a href="./begin.html" class="identifier">begin</a><v>::type</span> <span class="pre">>::type</span></tt>, <tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><v>::type</span></tt>);
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see <a class="reference internal" href="./front-extensible-sequence.html">Front Extensible Sequence</a>.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="example">
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<h3>Example</h3>
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<pre class="literal-block">
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typedef <a href="./vector.html" class="identifier">vector</a><float,double,long double> floats;
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typedef <a href="./push-back.html" class="identifier">push_back</a><floats,int>::type types;
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<a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( is_same< <a href="./at-c.html" class="identifier">at_c</a><types,3>::type, int > ));
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</pre>
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</div>
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<div class="section" id="id55">
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<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
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<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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<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body>
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