the graph's vertex
descriptor type, and our example that <em>was</em> ambiguous will smoothly
call the new overload.</p>
<div class="note">
<p class="first admonition-title">Note</p>
<p class="last">The <em>type</em> of the <tt class="docutils literal">graph</tt> argument is available in the
signature—and in the function body—as <tt class="docutils literal">graph_type</tt>.  In
general, to access the type of any parameter <em>foo</em>, write <em>foo</em><tt class="docutils literal">_type</tt>.</p>
</div