Hi Duncan, Sorry for the lagged reply.
I think the problem is in the value used for "zero" in file_dependencies.cpp. Since we are using > for comparison, I think "zero" should be std::numeric_limits<int>::max() instead of 0. Cheers, Jeremy On Sun, 22 Dec 2002, Duncan Clarke wrote: duncan> I downloaded the 1_29_0 version of Boost, compiled the file_dependencies.cpp duncan> example, and when I run it, the sample program aborts after throwing duncan> negative_edge in examine_edges(...) (from dijkstra_shortest_paths.cpp). duncan> duncan> After a little investigation, it looks to me like examine_edges(...) is duncan> supposed to protect against negative edge weights. It does so by calling duncan> the user-supplied comparison function to test each edge to make sure its duncan> weight is greater than the user-supplied zero value. But the call in duncan> examine_edges(...) is coded so that "if (EdgeWeight ? 0) then throw duncan> negative_edge()," where the example program uses the ">" operator for "?". duncan> Seems to me that those parameters are presented in the wrong order. duncan> duncan> I downloaded Boost 1_28_0 and the example compiled and ran without problems. duncan> A quick diff showed that the code to test for negative edge weights is new duncan> in BGL 1_29_0. duncan> duncan> So... is it a feature or a bug? duncan> duncan> I checked through all the boost newsgroups and couldn't find anything about duncan> this, but I'm new to Boost, so forgive me (and point me to the resolution) duncan> if this is a known problem. duncan> duncan> Thanks, duncan> duncan> Duncan Clarke duncan> Computer Science and Engineering duncan> University of South Carolina duncan> duncan> duncan> ---------------------------------------------------------------------- Jeremy Siek http://php.indiana.edu/~jsiek/ Ph.D. Student, Indiana Univ. B'ton email: [EMAIL PROTECTED] C++ Booster (http://www.boost.org) office phone: (812) 855-3608 ---------------------------------------------------------------------- _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
