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<h1 id="hawick_circuits"><code>hawick_circuits</code></h1>
<pre><code>template &lt;typename Graph, typename Visitor, typename VertexIndexMap&gt;
void hawick_circuits(Graph const&amp; graph, Visitor visitor, VertexIndexMap const&amp; vim = get(vertex_index, graph));
template &lt;typename Graph, typename Visitor, typename VertexIndexMap&gt;
void hawick_unique_circuits(Graph const&amp; graph, Visitor visitor, VertexIndexMap const&amp; vim = get(vertex_index, graph));
</code></pre>
<p>Enumerate all the elementary circuits in a directed multigraph. Specifically,
self-loops and redundant circuits caused by parallel edges are enumerated too.
<code>hawick_unique_circuits</code> may be used if redundant circuits caused by parallel
edges are not desired.</p>
<p>The algorithm is described in detail in
<a href="http://www.massey.ac.nz/~kahawick/cstn/013/cstn-013.pdf">http://www.massey.ac.nz/~kahawick/cstn/013/cstn-013.pdf</a>.</p>
<h3 id="where-defined">Where defined</h3>
<p><a href="../../../boost/graph/hawick_circuits.hpp"><code>#include &lt;boost/graph/hawick_circuits.hpp&gt;</code></a></p>
<h3 id="parameters">Parameters</h3>
<p><strong>IN:</strong> <code>Graph const&amp; graph</code></p>
<blockquote>
<p>The graph on which the algorithm is to be performed. It must be a model of
the <code>VertexListGraph</code> and <code>AdjacencyGraph</code> concepts.</p>
</blockquote>
<p><strong>IN:</strong> <code>Visitor visitor</code></p>
<blockquote>
<p>The visitor that will be notified on each circuit found by the algorithm.
The <code>visitor.cycle(circuit, graph)</code> expression must be valid, with <code>circuit</code>
being a <code>const</code>-reference to a random access sequence of <code>vertex_descriptor</code>s.</p>
<p>For example, if a circuit <code>u -&gt; v -&gt; w -&gt; u</code> exists in the graph, the
visitor will be called with a sequence consisting of <code>(u, v, w)</code>.</p>
</blockquote>
<p><strong>IN:</strong> <code>VertexIndexMap const&amp; vim = get(vertex_index, graph)</code></p>
<blockquote>
<p>A model of the <code>ReadablePropertyMap</code> concept mapping each <code>vertex_descriptor</code>
to an integer in the range <code>[0, num_vertices(graph))</code>. It defaults to using
the vertex index map provided by the <code>graph</code>.</p>
</blockquote>
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