n adjacency iterator for a vertex <i>v</i> provides access to the
vertices adjacent to <i>v</i>.  As such, the value type of an
adjacency iterator is the vertex descriptor type of its graph. An
adjacency iterator must meet the requirements of <a
href="../../utility/MultiPassInputIterator.html">MultiPassInputIterator</a>.
</TD>
</TR>

</table>

<h3>Valid Expressions</h3>


<table border>

<tr>
<td><a name="sec:adjacent-vertices"><TT>adjacent_vertices(v,&nbsp;g)</TT></a></TD>
<TD>
Returns an iterator-range pr