Am Dienstag, den 18.04.2006, 14:12 -0700 schrieb Foster Brereton:
FWIW, the Adobe Source Libraries solved this problem by implementing adobe::value_t, a cousin of boost::any that models the RegularType concept, and so requires operator== for any type it holds.
As you shamelessly pointed to your own, non-boost class, I hope I may do that, too :-). I wrote a class much like any which uses traits to determine whether an action is supported and if not, an exception is thrown at run-time. Its documentation and implementation might be poor but it's pretty nice to be able to dump your Xany - that's the classes name - values right on std::cerr. You can find the code here: http://gott.snip-a-lot.de/snapshots/ondemand/net.sourceforge.gott/gott/xany/
Blessings, Foster
Thank you, Aristid, who is a hobbyist programmer and student PS: Feel free to comment about my classes, whether via private mail or if that's fine for the list via the list.