Re: Exceptions and Objects

[Jonathan Scott Duff]

On Mon, Aug 14, 2000 at 04:09:41AM -0600, Tony Olekshy wrote:
> $@->CanFoo is an example of semantics that determines whether or
> not the exception is caught; stringification may be an example
> of semantics that comes into play when an exception is caught.

Ah, this is why I started asking I guess.  Some people were proposing
a try/catch like the following:

        try { } 
        catch SomeException { }
        catch SomeOtherException { }
        finally { }

which seems to only catch exceptions based on name.  Which implies to
me that, for exceptions to have useful semantics, they'd have to be
rethrown after they're caught.  I like the following, but it would
also seem that exceptions that aren't handled here would have to be
rethrown so that an upstream catch could handle them.

        try { } 
        catch {                         # ALL exceptions
            switch ($@) { 
                case ^_->name eq 'IO'   { ... }
                case ^_->canFoo         { ... }
                throw $@;               # No cases matched, rethrow
            }
        }
        finally { }


-Scott
-- 
Jonathan Scott Duff
[EMAIL PROTECTED]