On Tue, 21 Jun 2011, Shaun Jackman wrote:

Hi,

Is there a graph adapter that presents a view of the union of two graphs? The union graph would not be modifiable.

No -- it's something we've wanted for a while, but I don't think anyone has written one.

If not, any tips on how to go about implementing this?

If you are just taking the union of the edges and keeping the same vertex set, it should not be too difficult using iterator_adaptor. The issue for the general case (which you might not have) is how to handle properties that exist only on one side of the union or the other. You might want to try boost::optional for that, but the iterator design will be more complicated. -- Jeremiah Willcock