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<div><h2 class="title">
<a name="heap"></a>Chapter&#160;15.&#160;Boost.Heap</h2></div>
<div><div class="author"><h3 class="author">
<span class="firstname">Tim</span> <span class="surname">Blechmann</span>
</h3></div></div>
<div><p class="copyright">Copyright &#169; 2010, 2011 Tim Blechmann</p></div>
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<a name="heap.legal"></a><p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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<p><b>Table of Contents</b></p>
<dl class="toc">
<dt><span class="section"><a href="heap.html#heap.introduction___motivation">Introduction &amp; Motivation</a></span></dt>
<dt><span class="section"><a href="heap/concepts.html">Concepts &amp; Interface</a></span></dt>
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<dt><span class="section"><a href="heap/concepts.html#heap.concepts.basic">Basic Priority Queue Interface</a></span></dt>
<dt><span class="section"><a href="heap/concepts.html#heap.concepts.iterators">Priority Queue Iterators</a></span></dt>
<dt><span class="section"><a href="heap/concepts.html#heap.concepts.comparing">Comparing Priority Queues &amp;
      Equivalence</a></span></dt>
<dt><span class="section"><a href="heap/concepts.html#heap.concepts.merge">Merging Priority Queues</a></span></dt>
<dt><span class="section"><a href="heap/concepts.html#heap.concepts.mutability">Mutability</a></span></dt>
<dt><span class="section"><a href="heap/concepts.html#heap.concepts.stability">Stability</a></span></dt>
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<dd><dl><dt><span class="section"><a href="heap/data_structures.html#heap.data_structures.data_structure_configuration">Data
      Structure Configuration</a></span></dt></dl></dd>
<dt><span class="section"><a href="heap/reference.html">Reference</a></span></dt>
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<dt><span class="section"><a href="heap/reference.html#header.boost.heap.binomial_heap_hpp">Header &lt;boost/heap/binomial_heap.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.d_ary_heap_hpp">Header &lt;boost/heap/d_ary_heap.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.fibonacci_heap_hpp">Header &lt;boost/heap/fibonacci_heap.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.heap_concepts_hpp">Header &lt;boost/heap/heap_concepts.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.heap_merge_hpp">Header &lt;boost/heap/heap_merge.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.pairing_heap_hpp">Header &lt;boost/heap/pairing_heap.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.policies_hpp">Header &lt;boost/heap/policies.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.priority_queue_hpp">Header &lt;boost/heap/priority_queue.hpp&gt;</a></span></dt>
<dt><span class="section"><a href="heap/reference.html#header.boost.heap.skew_heap_hpp">Header &lt;boost/heap/skew_heap.hpp&gt;</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="heap/acknowledgements.html">Acknowledgements</a></span></dt>
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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="heap.introduction___motivation"></a><a class="link" href="heap.html#heap.introduction___motivation" title="Introduction &amp; Motivation">Introduction &amp; Motivation</a>
</h2></div></div></div>
<p>
      <code class="literal">boost.heap</code> is an implementation of priority queues. Priority
      queues are queue data structures, that order their elements by a priority.
      The STL provides a single template class <code class="literal">std::priority_queue</code>,
      which only provides a limited functionality. To overcome these limitations,
      <code class="literal">boost.heap</code> implements <a class="link" href="heap/data_structures.html" title="Data Structures">data
      structures</a> with more functionality and different performance characteristics.
      Especially, it deals with additional aspects:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
          <span class="bold"><strong>Mutability</strong></span>: The priority of heap elements
          can be modified.
        </li>
<li class="listitem">
          <span class="bold"><strong>Iterators</strong></span>: Heaps provide iterators to
          iterate all elements.
        </li>
<li class="listitem">
          <span class="bold"><strong>Mergable</strong></span>: While all heaps can be merged,
          some can be merged efficiently.
        </li>
<li class="listitem">
          <span class="bold"><strong>Stability</strong></span>: Heaps can be configured to
          be stable sorted.
        </li>
<li class="listitem">
          <span class="bold"><strong>Comparison</strong></span>: Heaps can be compared for
          equivalence.
        </li>
</ul></div>
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