Concepts? Template specialization depending on class functions?

[Walter Bright]

"Ben Phillips" <Ben_member at pathlink.com> wrote in message 
news:du751p$1imp$1 at digitaldaemon.com...
> One idea I've heard is to use
> "concepts" (a possible
> extension to C++) where code would go as follows

Concepts are an interesting idea. As far as I know, nobody has implemented 
it for C++ so nobody knows if it really works or not.