&gt; <br />&gt; there is a compile error when trying to get a particular value from a<br />&gt; nonexistent member of a bundled property map.  Is
that a case that is<br />&gt; important to you?  There are several Boost graph algorithms that make a<br /><br />Thanks a lot for your detailed
answer :)<br />No, for the moment, that case is not important to me, as, for the moment,<br />the only real need I have is to find out whether a
given graph has the internal<br />vertex-index property that, for example, adjacency_list with vecS for<br />vertex list has.<br />Based on this
information, I'll directly invoke algorithms<br />that need that property, or I'll build a property_map with assigned indices<br />for vertices and
pass it to the algorithm.<br />Right now I always do this last option, but it would save running time,<br />if I could detect when this property
already exists,<br />so that I don't have to create the property map, which takes linear time.<br />Cheers,<br /><br />Juan