I'm personally using edge descriptors as keys for a map type and it works (I use version 1.38).<br />Vertex descriptors also work with
boost::unordered_map, but the sad thing is that edge descriptors don't work with it, and it'd be nice.<br />Just one thing:<br />When you say you
use vecS for edge storage type, you mean OutEdgeList or EdgeList?<br />I ask that cause in known problems it says that, for the moment, only listS
is guarranted to work for EdgeList<br />(the last template parameter of adjacency_list).<br />In fact I tried to use vecS for it and I had serious
problems. With listS everything works all right. Of course, for OutEdgeList, vecS is fine :)<br />Cheers,<br /><br />Juan<br /><br />&gt;&gt;
Strangely enough, I use std::set&lt;edge_descriptor&gt; without having to<br />&gt;&gt; define a less-than operator. &nbsp;Perhaps it has to do with
what the<br />&gt;&gt; vertex and edge storage types are? &nbsp;I use vecS for both.<br />