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<tt><strong class="selflink"> std::queue</strong></tt><div class="t-navbar-menu"><div><div>
<table class="t-sb-list-begin" cellpadding="0" style="">
<tr class="t-sb-list-h1"><td colspan="5">  Member functions
</td></tr>
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</td></tr>
<tr class="t-sb-list-h2"><td colspan="5">  Element access
</td></tr>
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<tr class="t-sb-list-h2"><td colspan="5">  Capacity
</td></tr>
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<tr class="t-sb-list-h2"><td colspan="5">  Modifiers
</td></tr>
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<td> <div>Defined in header <tt>&lt;queue&gt;</tt>
 </div>
</td>
<td></td>
<td></td>
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<td class="t-ddcl-list-item-nopad"> <div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span><br><p>    <span class="kw1">class</span> T,<br>
    <span class="kw1">class</span> Container <span class="sy1">=</span> <a href="deque.html"><span class="kw1056">std::<span class="me2">deque</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><br></p>
<span class="sy1">&gt;</span> <span class="kw1">class</span> queue<span class="sy4">;</span></span></div>
</td>
<td class="t-ddcl-list-item-nopad">  </td>
<td class="t-ddcl-list-item-nopad">  </td>
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<tr><td colspan="3" class="t-ddcl-list-sep"></td></tr>
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<p>The <tt>std::queue</tt> class is a container adapter that gives the programmer the functionality of a queue - specifically, a FIFO (first-in, first-out) data structure. 
</p>
<table id="toc" class="toc"><tr><td>
<div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Member_types"><span class="tocnumber">1</span> <span class="toctext">Member types</span></a></li>
<li class="toclevel-1 tocsection-2">
<a href="#Member_functions"><span class="tocnumber">2</span> <span class="toctext">Member functions</span></a>
<ul>
<li class="toclevel-2"><a href="#Element_access"><span class="tocnumber">2.1</span> <span class="toctext">Element access</span></a></li>
<li class="toclevel-2"><a href="#Capacity"><span class="tocnumber">2.2</span> <span class="toctext">Capacity</span></a></li>
<li class="toclevel-2"><a href="#Modifiers"><span class="tocnumber">2.3</span> <span class="toctext">Modifiers</span></a></li>
</ul>
</li>
<li class="toclevel-1"><a href="#Member_objects"><span class="tocnumber">3</span> <span class="toctext">Member objects</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="#Non-member_functions"><span class="tocnumber">4</span> <span class="toctext">Non-member functions</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="#Helper_classes"><span class="tocnumber">5</span> <span class="toctext">Helper classes</span></a></li>
</ul>
</td></tr></table>
<h3>
<span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/container/queue&amp;action=edit&amp;section=1" title="Edit section: Member types">edit</a>]</span> <span class="mw-headline" id="Member_types">Member types</span>
</h3>
<table class="t-dcl-list-begin">
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-hitem">
<td>  Member type
</td>
<td>  Definition
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <tt>container_type</tt>
</td>
<td>  <tt>Container</tt> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <tt>value_type</tt>
</td>
<td>  <tt>Container::value_type</tt> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <tt>size_type</tt>
</td>
<td>  <tt>Container::size_type</tt> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <tt>reference</tt>
</td>
<td>  <tt>Container::reference</tt> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <tt>const_reference</tt>
</td>
<td>  <tt>Container::const_reference</tt> 
</td>
</tr>
</table>
<h3>
<span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/container/queue&amp;action=edit&amp;section=2" title="Edit section: Member functions">edit</a>]</span> <span class="mw-headline" id="Member_functions">Member functions</span>
</h3>
<table class="t-dcl-list-begin">
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div t-dcl-member-nobold-div"><div><a href="queue/queuehtml.html" title="cpp/container/queue/queue"> (constructor)</a></div></div>
</td>
<td>  constructs the <tt>queue</tt> <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div t-dcl-member-nobold-div"><div><a href="queue/_queue.html" title="cpp/container/queue/~queue"> (destructor)</a></div></div>
</td>
<td>  destructs the <tt>queue</tt> <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/operator%3d.html" title="cpp/container/queue/operator="> operator=</a></div></div>
</td>
<td>   assigns values to the container adaptor <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2"> <h5> <span class="mw-headline" id="Element_access">  Element access </span>
</h5>
</td></tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/front.html" title="cpp/container/queue/front"> front</a></div></div>
</td>
<td>   access the first element  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/back.html" title="cpp/container/queue/back"> back</a></div></div>
</td>
<td>   access the last element  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2"> <h5> <span class="mw-headline" id="Capacity">  Capacity </span>
</h5>
</td></tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/empty.html" title="cpp/container/queue/empty"> empty</a></div></div>
</td>
<td>   checks whether the underlying container is empty  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/size.html" title="cpp/container/queue/size"> size</a></div></div>
</td>
<td>   returns the number of elements  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2"> <h5> <span class="mw-headline" id="Modifiers">  Modifiers </span>
</h5>
</td></tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/push.html" title="cpp/container/queue/push"> push</a></div></div>
</td>
<td>   inserts element at the end <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div">
<div><a href="queue/emplace.html" title="cpp/container/queue/emplace"> emplace</a></div>
<div><span class="t-mark">(C++11)</span></div>
</div>
</td>
<td>   constructs element in-place at the end  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/pop.html" title="cpp/container/queue/pop"> pop</a></div></div>
</td>
<td>   removes the first element  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/swap.html" title="cpp/container/queue/swap"> swap</a></div></div>
</td>
<td>   swaps the contents  <br><span class="t-mark">(public member function)</span> 
</td>
</tr>
<tr><td colspan="2"> <h3> <span class="mw-headline" id="Member_objects"> Member objects</span>
</h3>
</td></tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div>
<span class="t-dcl-small">Container</span> c</div></div>
</td>
<td>   the underlying container <br><span class="t-mark">(protected member object)</span> 
</td>
</tr>
</table>
<h3>
<span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/container/queue&amp;action=edit&amp;section=3" title="Edit section: Non-member functions">edit</a>]</span> <span class="mw-headline" id="Non-member_functions">Non-member functions</span>
</h3>
<table class="t-dcl-list-begin">
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/container/queue/operator_cmp&amp;action=edit&amp;redlink=1" class="new" title="cpp/container/queue/operator cmp (page does not exist)"> operator==<br>operator!=<br>operator&lt;<br>operator&lt;=<br>operator&gt;<br>operator&gt;=</a></div></div>
</td>
<td>   lexicographically compares the values in the queue  <br><span class="t-mark">(function template)</span> 
</td>
</tr>
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div"><div><a href="queue/swap2.html" title="cpp/container/queue/swap2"> std::swap<span class="t-dcl-small">(std::queue)</span></a></div></div>
</td>
<td>   specializes the <span class="mw-geshi cpp source-cpp"><a href="../algorithm/swap.html"><span class="kw1274">std::<span class="me2">swap</span></span></a></span> algorithm  <br><span class="t-mark">(function template)</span> 
</td>
</tr>
</table>
<h3>
<span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/container/queue&amp;action=edit&amp;section=4" title="Edit section: Helper classes">edit</a>]</span> <span class="mw-headline" id="Helper_classes">Helper classes</span>
</h3>
<table class="t-dcl-list-begin">
<tr><td colspan="2" class="t-dcl-list-sep">
</td></tr>
<tr class="t-dcl-list-item">
<td>  <div class="t-dcl-member-div">
<div><a href="queue/uses_allocator.html" title="cpp/container/queue/uses allocator"> std::uses_allocator<span class="t-dcl-small">&lt;std::queue&gt;</span></a></div>
<div><span class="t-mark">(C++11)</span></div>
</div>
</td>
<td>   specializes the <span class="mw-geshi cpp source-cpp"><a href="../memory/uses_allocator.html"><span class="kw571">std::<span class="me2">uses_allocator</span></span></a></span> type trait  <br><span class="t-mark">(function template)</span> 
</td>
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</table>
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