At 08:23 PM 8/16/00 +0000, Perl6 RFC Librarian wrote:
>=head3 Scoping problems
>
>Let's presume the example often cited, of wishing to close a file
>handle during the unwind, here's some C++ for that:
>
> FILE *handle;
> try {
> handle = fopen ( ... );
> ...
> }
> catch ( ... ) {
> fclose ( handle );
> throw;
> }
>
>Note that "handle" has to be defined outside the scope of the try,
>because catch cannot see the scope defined by the try block, and is
>completely unable to recover from problems that are not explicitly
>hoisted outside of the try block.
This is a good point, and an argument for the try, catch, and finally
blocks sharing the same lexical scope the way that continue blocks do with
while. Another reason to call it 'continue' instead of 'finally' :-)
--
Peter Scott
Pacific Systems Design Technologies
