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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="PODType.html" title="cpp/concept/PODType"><span class="t-lines"><span>PODType</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Library-Wide</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="EqualityComparable.html" title="cpp/concept/EqualityComparable"><span class="t-lines"><span>EqualityComparable</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="LessThanComparable.html" title="cpp/concept/LessThanComparable"><span class="t-lines"><span>LessThanComparable</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Swappable.html" title="cpp/concept/Swappable"><span class="t-lines"><span>Swappable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ValueSwappable.html" title="cpp/concept/ValueSwappable"><span class="t-lines"><span>ValueSwappable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="NullablePointer.html" title="cpp/concept/NullablePointer"><span class="t-lines"><span>NullablePointer</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Hash.html" title="cpp/concept/Hash"><span class="t-lines"><span>Hash</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Allocator.html" title="cpp/concept/Allocator"><span class="t-lines"><span>Allocator</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Container</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Container.html" title="cpp/concept/Container"><span class="t-lines"><span>Container</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="SequenceContainer.html" title="cpp/concept/SequenceContainer"><span class="t-lines"><span>SequenceContainer</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/ContiguousContainer&action=edit&redlink=1" class="new" title="cpp/concept/ContiguousContainer (page does not exist)"><span class="t-lines"><span>ContiguousContainer</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ReversibleContainer.html" title="cpp/concept/ReversibleContainer"><span class="t-lines"><span>ReversibleContainer</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><strong class="selflink"><span class="t-lines"><span>AssociativeContainer</span></span></strong></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="AllocatorAwareContainer.html" title="cpp/concept/AllocatorAwareContainer"><span class="t-lines"><span>AllocatorAwareContainer</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="UnorderedAssociativeContainer.html" title="cpp/concept/UnorderedAssociativeContainer"><span class="t-lines"><span>UnorderedAssociativeContainer</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> Container Elements</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="DefaultInsertable.html" title="cpp/concept/DefaultInsertable"><span class="t-lines"><span>DefaultInsertable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="CopyInsertable.html" title="cpp/concept/CopyInsertable"><span class="t-lines"><span>CopyInsertable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="MoveInsertable.html" title="cpp/concept/MoveInsertable"><span class="t-lines"><span>MoveInsertable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="EmplaceConstructible.html" title="cpp/concept/EmplaceConstructible"><span class="t-lines"><span>EmplaceConstructible</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Eraseable.html" title="cpp/concept/Erasable"><span class="t-lines"><span>Erasable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Iterator</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Iterator.html" title="cpp/concept/Iterator"><span class="t-lines"><span>Iterator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="OutputIterator.html" title="cpp/concept/OutputIterator"><span class="t-lines"><span>OutputIterator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="InputIterator.html" title="cpp/concept/InputIterator"><span class="t-lines"><span>InputIterator</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="ForwardIterator.html" title="cpp/concept/ForwardIterator"><span class="t-lines"><span>ForwardIterator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="BidirectionalIterator.html" title="cpp/concept/BidirectionalIterator"><span class="t-lines"><span>BidirectionalIterator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="RandomAccessIterator.html" title="cpp/concept/RandomAccessIterator"><span class="t-lines"><span>RandomAccessIterator</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/ContiguousIterator&action=edit&redlink=1" class="new" title="cpp/concept/ContiguousIterator (page does not exist)"><span class="t-lines"><span>ContiguousIterator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Stream I/O</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="FormattedInputFunction.html" title="cpp/concept/FormattedInputFunction"><span class="t-lines"><span>FormattedInputFunction</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="UnformattedInputFunction.html" title="cpp/concept/UnformattedInputFunction"><span class="t-lines"><span>UnformattedInputFunction</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="FormattedOutputFunction.html" title="cpp/concept/FormattedOutputFunction"><span class="t-lines"><span>FormattedOutputFunction</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="UnformattedOutputFunction.html" title="cpp/concept/UnformattedOutputFunction"><span class="t-lines"><span>UnformattedOutputFunction</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Random Numbers</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="SeedSequence.html" title="cpp/concept/SeedSequence"><span class="t-lines"><span>SeedSequence</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/RandomNumberEngine&action=edit&redlink=1" class="new" title="cpp/concept/RandomNumberEngine (page does not exist)"><span class="t-lines"><span>RandomNumberEngine</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="RandomNumberDistribution.html" title="cpp/concept/RandomNumberDistribution"><span class="t-lines"><span>RandomNumberDistribution</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="UniformRandomBitGenerator.html" title="cpp/concept/UniformRandomBitGenerator"><span class="t-lines"><span>UniformRandomBitGenerator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/RandomNumberEngineAdaptor&action=edit&redlink=1" class="new" title="cpp/concept/RandomNumberEngineAdaptor (page does not exist)"><span class="t-lines"><span>RandomNumberEngineAdaptor</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Concurrency</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="BasicLockable.html" title="cpp/concept/BasicLockable"><span class="t-lines"><span>BasicLockable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Lockable.html" title="cpp/concept/Lockable"><span class="t-lines"><span>Lockable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="TimedLockable.html" title="cpp/concept/TimedLockable"><span class="t-lines"><span>TimedLockable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Mutex.html" title="cpp/concept/Mutex"><span class="t-lines"><span>Mutex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="TimedMutex.html" title="cpp/concept/TimedMutex"><span class="t-lines"><span>TimedMutex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="SharedMutex.html" title="cpp/concept/SharedMutex"><span class="t-lines"><span>SharedMutex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="SharedTimedMutex.html" title="cpp/concept/SharedTimedMutex"><span class="t-lines"><span>SharedTimedMutex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> Other</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/CharTraits&action=edit&redlink=1" class="new" title="cpp/concept/CharTraits (page does not exist)"><span class="t-lines"><span>CharTraits</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/pos_type&action=edit&redlink=1" class="new" title="cpp/concept/pos type (page does not exist)"><span class="t-lines"><span>pos_type</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/off_type&action=edit&redlink=1" class="new" title="cpp/concept/off type (page does not exist)"><span class="t-lines"><span>off_type</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="Clock.html" title="cpp/concept/Clock"><span class="t-lines"><span>Clock</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="BitmaskType.html" title="cpp/concept/BitmaskType"><span class="t-lines"><span>BitmaskType</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/UnaryTypeTrait&action=edit&redlink=1" class="new" title="cpp/concept/UnaryTypeTrait (page does not exist)"><span class="t-lines"><span>UnaryTypeTrait</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/BinaryTypeTrait&action=edit&redlink=1" class="new" title="cpp/concept/BinaryTypeTrait (page does not exist)"><span class="t-lines"><span>BinaryTypeTrait</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/TransformationTrait&action=edit&redlink=1" class="new" title="cpp/concept/TransformationTrait (page does not exist)"><span class="t-lines"><span>TransformationTrait</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="TrivialClock.html" title="cpp/concept/TrivialClock"><span class="t-lines"><span>TrivialClock</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="LiteralType.html" title="cpp/concept/LiteralType"><span class="t-lines"><span>LiteralType</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
</table></div><div><span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/concept/navbar_content&action=edit">[edit]</a></span></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>An <code><b>AssociativeContainer</b></code> is an ordered <a href="Container.html" title="cpp/concept/Container"><code>Container</code></a> that provides fast lookup of objects based on keys.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/AssociativeContainer&action=edit&section=1" title="Edit section: Requirements">edit</a>]</span> <span class="mw-headline" id="Requirements">Requirements</span></h3>
<table class="t-dsc-begin">
<tr>
<td colspan="2"> <h3> <span class="mw-headline" id="Legend">Legend</span></h3>
</td></tr>
<tr class="t-dsc">
<td> <code><b>X</b></code>
</td>
<td> Container type
</td></tr>
<tr class="t-dsc">
<td> <code><b>a</b></code>
</td>
<td> Value of type <code><b>X</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>a2</b></code>
</td>
<td> Value of a type <code><b>Y</b></code> whose <a href="../container/node_handle.html" title="cpp/container/node handle">node handles</a> are compatible with X
</td></tr>
<tr class="t-dsc">
<td> <code><b>b</b></code>
</td>
<td> Possibly const value of type <code><b>X</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>u</b></code>
</td>
<td> Arbitrary variable name
</td></tr>
<tr class="t-dsc">
<td> <code><b>a_uniq</b></code>
</td>
<td> Value of type <code><b>X</b></code> when <code><b>X</b></code> supports unique keys
</td></tr>
<tr class="t-dsc">
<td> <code><b>a_eq</b></code>
</td>
<td> Value of type <code><b>X</b></code> when <code><b>X</b></code> supports multiple keys
</td></tr>
<tr class="t-dsc">
<td> <code><b>a_tran</b></code>
</td>
<td> Possibly const value of type <code><b>X</b></code> when type <code>X::key_compare::is_transparent</code> exists
</td></tr>
<tr class="t-dsc">
<td> <code><b>i</b></code>, <code><b>j</b></code>
</td>
<td> <a href="InputIterator.html" title="cpp/concept/InputIterator"><code>InputIterator</code>s</a> denoting a valid range and referring to elements implicitly convertible to <code>X::value_type</code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>p</b></code>
</td>
<td> A valid const iterator to <code><b>a</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>q</b></code>
</td>
<td> A valid dereferenceable const iterator to <code><b>a</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>r</b></code>
</td>
<td> A valid dereferenceable iterator to <code><b>a</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>q1</b></code>, <code><b>q2</b></code>
</td>
<td> const iterators denoting a valid range in <code><b>a</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>il</b></code>
</td>
<td> An object of type <span class="t-lc"><a href="../utility/initializer_list.html" title="cpp/utility/initializer list">std::initializer_list</a></span><value_type>
</td></tr>
<tr class="t-dsc">
<td> <code><b>t</b></code>
</td>
<td> A value of type <code><b>X::value_type</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>k</b></code>
</td>
<td> A value of type <code><b>X::key_type</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>c</b></code>
</td>
<td> A possibly const value of type <code><b>X::key_compare</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>kl</b></code>
</td>
<td> A value such that <code><b>a</b></code> is partitioned with respect to <span class="t-c"><span class="mw-geshi cpp source-cpp">c<span class="br0">(</span>r,kl<span class="br0">)</span></span></span>, with <code>r</code> the key value of <code>e</code> and <code>e</code> in <code>a</code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>ku</b></code>
</td>
<td> A value such that <code><b>a</b></code> is partitioned with respect to <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy3">!</span>c<span class="br0">(</span>ku, r<span class="br0">)</span></span></span>
</td></tr>
<tr class="t-dsc">
<td> <code><b>ke</b></code>
</td>
<td> A value such that <code><b>a</b></code> is partitioned with respect to <span class="t-c"><span class="mw-geshi cpp source-cpp">c<span class="br0">(</span>r, ke<span class="br0">)</span></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy3">!</span>c<span class="br0">(</span>ke, r<span class="br0">)</span></span></span>, with <span class="t-c"><span class="mw-geshi cpp source-cpp">c<span class="br0">(</span>r, ke<span class="br0">)</span></span></span> implying <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy3">!</span>c<span class="br0">(</span>ke, r<span class="br0">)</span></span></span>
</td></tr>
<tr class="t-dsc">
<td> <code><b>A</b></code>
</td>
<td> Storage allocator used by <code><b>X</b></code>, or <span class="t-lc">std::allocator_type<X::value_type></span>
</td></tr>
<tr class="t-dsc">
<td> <code><b>m</b></code>
</td>
<td> Allocator of a type convertible to <code><b>A</b></code>
</td></tr>
<tr class="t-dsc">
<td> <code><b>nh</b></code>
</td>
<td> A non-const rvalue of type <code>X::node_type</code>
</td></tr>
</table>
<table class="wikitable">
<tr>
<th>expression</th>
<th>return type</th>
<th>pre/requirements</th>
<th>post/effects</th>
<th>complexity
</th></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">key_type</span></span></span></td>
<td><code><b>Key</b></code></td>
<td><code><b>Key</b></code> is <a href="Destructible.html" title="cpp/concept/Destructible"><code>Destructible</code></a></td>
<td> </td>
<td>compile time
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">key_compare</span></span></span></td>
<td><code><b>Compare</b></code></td>
<td> </td>
<td> </td>
<td>compile time
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">value_compare</span></span></span></td>
<td>a type satisfying <a href="BinaryPredicate.html" title="cpp/concept/BinaryPredicate"><code>BinaryPredicate</code></a></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">key_compare</span></span> for <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../container/set.html"><span class="kw1274">std::<span class="me2">set</span></span></a></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../container/multiset.html"><span class="kw1276">std::<span class="me2">multiset</span></span></a></span></span>; an ordering relation over <code><b>Key</b></code> for <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../container/map.html"><span class="kw1278">std::<span class="me2">map</span></span></a></span></span> and <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../container/multimap.html"><span class="kw1282">std::<span class="me2">multimap</span></span></a></span></span> </td>
<td> </td>
<td>compile time
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span>c<span class="br0">)</span></span></span>, <span class="t-c"><span class="mw-geshi cpp source-cpp">X a<span class="br0">(</span>c<span class="br0">)</span><span class="sy4">;</span></span></span></td>
<td> </td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">key_compare</span></span> is <a href="CopyConstructible.html" title="cpp/concept/CopyConstructible"><code>CopyConstructible</code></a></td>
<td>Construct an empty container using a copy of <span class="t-c"><span class="mw-geshi cpp source-cpp">c</span></span> as <code><b>key_comp</b></code></td>
<td>constant
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span><span class="br0">)</span></span></span>, <span class="t-c"><span class="mw-geshi cpp source-cpp">X a<span class="sy4">;</span></span></span></td>
<td> </td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">key_compare</span></span> is <a href="CopyConstructible.html" title="cpp/concept/CopyConstructible"><code>CopyConstructible</code></a></td>
<td>Construct an empty container using a <span class="t-c"><span class="mw-geshi cpp source-cpp">Compare<span class="br0">(</span><span class="br0">)</span></span></span> as <code><b>key_comp</b></code></td>
<td>constant
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span>i, j, c<span class="br0">)</span></span></span>, <span class="t-c"><span class="mw-geshi cpp source-cpp">X a<span class="br0">(</span>i, j, c<span class="br0">)</span><span class="sy4">;</span></span></span></td>
<td> </td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">key_compare</span></span> is <a href="CopyConstructible.html" title="cpp/concept/CopyConstructible"><code>CopyConstructible</code></a> and <span class="t-c"><span class="mw-geshi cpp source-cpp">value_type</span></span> is <a href="EmplaceConstructible.html" title="cpp/concept/EmplaceConstructible"><code>EmplaceConstructible</code></a> into <span class="t-c"><span class="mw-geshi cpp source-cpp">X</span></span> from <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>i</span></span></td>
<td>Constructs an empty container using a copy of <span class="t-c"><span class="mw-geshi cpp source-cpp">c</span></span> as <code><b>key_comp</b></code> and inserts all elements from the range <code>[i; j)</code></td>
<td>generally <code>N log N</code>, or <code>N</code> if <code>[i, j)</code> is sorted (where <code>N</code> is <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../iterator/distance.html"><span class="kw673">std::<span class="me2">distance</span></span></a><span class="br0">(</span>i, j<span class="br0">)</span></span></span>)
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span>i, j<span class="br0">)</span></span></span>, <span class="t-c"><span class="mw-geshi cpp source-cpp">X a<span class="br0">(</span>i, j<span class="br0">)</span><span class="sy4">;</span></span></span></td>
<td> </td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">key_compare</span></span> is <a href="CopyConstructible.html" title="cpp/concept/CopyConstructible"><code>CopyConstructible</code></a> and <span class="t-c"><span class="mw-geshi cpp source-cpp">value_type</span></span> is <a href="EmplaceConstructible.html" title="cpp/concept/EmplaceConstructible"><code>EmplaceConstructible</code></a> into <span class="t-c"><span class="mw-geshi cpp source-cpp">X</span></span> from <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>i</span></span></td>
<td>Constructs an empty container using a <span class="t-c"><span class="mw-geshi cpp source-cpp">Compare<span class="br0">(</span><span class="br0">)</span></span></span> as <code><b>key_comp</b></code> and inserts all elements from the range <code>[i; j)</code></td>
<td>generally <code>N log N</code>, or <code>N</code> if <code>[i, j)</code> is sorted according to <span class="t-c"><span class="mw-geshi cpp source-cpp">value_comp<span class="br0">(</span><span class="br0">)</span></span></span> (where <code>N</code> is <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="../iterator/distance.html"><span class="kw673">std::<span class="me2">distance</span></span></a><span class="br0">(</span>i, j<span class="br0">)</span></span></span>)
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span>il<span class="br0">)</span><span class="sy4">;</span></span></span></td>
<td> </td>
<td>Equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span>il.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, il.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></span></td>
<td>Equivalent to <span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="br0">(</span>il.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, il.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span></span></span>
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">a <span class="sy1">=</span> il</span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy3">&</span></span></span></td>
<td><code><b>T</b></code> is <a href="CopyInsertable.html" title="cpp/concept/CopyInsertable"><code>CopyInsertable</code></a> into <code><b>X</b></code> and also <a href="CopyAssignable.html" title="cpp/concept/CopyAssignable"><code>CopyAssignable</code></a></td>
<td>Assign the range <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="br0">[</span>il.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, il.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> into <code><b>a</b></code>. Elements of <code><b>a</b></code> that were not assigned to are destroyed</td>
<td>generally <code>N log N</code>, or <code>N</code> if <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="br0">[</span>il.<span class="me1">begin</span><span class="br0">(</span><span class="br0">)</span>, il.<span class="me1">end</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span> is sorted according to <span class="t-c"><span class="mw-geshi cpp source-cpp">value_comp<span class="br0">(</span><span class="br0">)</span></span></span> (where <code>N</code> is <span class="t-c"><span class="mw-geshi cpp source-cpp">il.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> a.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span></span></span>)
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">a.<span class="me1">key_comp</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">key_compare</span></span></span></td>
<td> </td>
<td>The comparison object with which <code><b>a</b></code> was constructed is returned.</td>
<td>constant
</td></tr>
<tr>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">a.<span class="me1">value_comp</span><span class="br0">(</span><span class="br0">)</span></span></span></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">value_compare</span></span></span></td>
<td> </td>
<td>An object of type <span class="t-c"><span class="mw-geshi cpp source-cpp">X<span class="sy4">::</span><span class="me2">value_compare</span></span></span> constructed out of the comparison object is returned.</td>
<td>constant
</td></tr>
</table>
<p>An AssociativeContainer <code><b>X</b></code> that is either <code><b>std::map</b></code> and <code><b>std::multimap</b></code> additionally supports the expression X::mapped_type, which has a return type of T, with the requirement that <code><b>T</b></code> be <a href="Destructible.html" title="cpp/concept/Destructible"><code>Destructible</code></a>, and compile time complexity.
</p>
<table class="metadata plainlinks ambox mbox-small-left ambox-notice" style=""><tr><td class="mbox-empty-cell"></td><td class="mbox-text" style="">This section is incomplete<br />Reason: Finish requirements. </td></tr></table>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=cpp/concept/AssociativeContainer&action=edit&section=2" title="Edit section: AssociativeContainers in the standard library">edit</a>]</span> <span class="mw-headline" id="AssociativeContainers_in_the_standard_library">AssociativeContainers in the standard library</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/set.html" title="cpp/container/set"> <span class="t-lines"><span>set</span></span></a></div></div>
</td>
<td> collection of unique keys, sorted by keys <br /> <span class="t-mark">(class template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/dsc_set&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/multiset.html" title="cpp/container/multiset"> <span class="t-lines"><span>multiset</span></span></a></div></div>
</td>
<td> collection of keys, sorted by keys <br /> <span class="t-mark">(class template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/dsc_multiset&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/map.html" title="cpp/container/map"> <span class="t-lines"><span>map</span></span></a></div></div>
</td>
<td> collection of key-value pairs, sorted by keys, keys are unique <br /> <span class="t-mark">(class template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/dsc_map&action=edit">[edit]</a></span>
</td></tr>
<tr class="t-dsc">
<td> <div class="t-dsc-member-div"><div><a href="../container/multimap.html" title="cpp/container/multimap"> <span class="t-lines"><span>multimap</span></span></a></div></div>
</td>
<td> collection of key-value pairs, sorted by keys <br /> <span class="t-mark">(class template)</span> <span class="editsection noprint plainlinks" title="Edit this template"><a rel="nofollow" class="external text" href="http://en.cppreference.com/mwiki/index.php?title=Template:cpp/container/dsc_multimap&action=edit">[edit]</a></span>
</td></tr>
</table>
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