I think that it would be handy to introduce "null vertex value" into BGL. For example, I'm computing some 'alternative vertices' in some function. If no such vertex exists, I'd like to record this fact, so that when the function is called again on the same vertex, I don't have to do anything. I'd like to write
alternative[v] = null_vertex(g); or something similiar. This is feasible: if vertex_descirptor is pointer, you have a natural value for null. If vertex descriptor is interger, well... you can use index 0 for null vertex. This would waste a bit of space, but is it that important? Opinions? - Volodya _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
