Kai Henningsen wrote:
>
> Tony Olekshy wrote:
>
> > What if we implemented something like the following?
>
> Seems that the basic unwinder is
>
> > except { ... } => catch { ... }
>
> and everything else can be written in terms of this:
>
> > catch { ... }
>
> except { 1 } => catch { ... }
Yes. But a simple try { } catch { } is a common use.
> > catch "ClassName" { ... }
>
> except { $@->isa($ClassName") } catch { }
Yes. This one's clearly syntactic sugar, but it may very well be
quite a common usage if Perl 6 goes to internal error exceptions.
> > finally { ... }
>
> except { 1 } => catch { ... ; throw $@ }
No. The finally clause must be invoked whether or not anything
has thrown since the beginning of the try. Except { 1 } will
*not* match if nothing has been thrown. Catch and finally are
semantically very distinct.
Yours, &c, Tony Olekshy
