From: "Bronek Kozicki" <brok@rubikon.pl> Now you see the problem, but if these lines are in two separate locations (as is often the case with throw ... catch) it will be much more difficult to diagnose. Futhermore, tags provide nice clue that there are some data specific to exception being passed - just like exception hierarchy does. Last but not least, forward declarations have a nice property that they can be declared in multiple locations (no need for central location) and compiler will verify that they are used uniformly.
The compiler cannot check that the right tag is used since information is added to the exception at runtime, so you're still vulnerable to typos. That means you would still have to either put the tags or static strings in a central header file to unify the exception handling code at the throw/catch site. _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/