Re: Anonymous class - I don't know how to...

On Jun 29, 8:21 am, Andreas Leitgeb <a...@xxxxxxxxxxxxxxxxxxxxxxxx>
wrote:
PS: full blown support for closures means direct support,
not just with help of explicit "containers/wrappers".

All that they need to do is write in some syntactic sugar for the
stuff I demonstrated in this thread. For the passing-in-mutable-locals
thing, silently autoboxing them in one-element arrays -- not unlike
the autoboxing of primitives put into container classes or otherwise
used with generics in 1.5. A return-from-context capability could use
an anonymous exception throw and catch under the hood, not allow the
exception to be absorbed by intervening code (even if it has "catch
(Exception e) {...}"; of course "finally" clauses would still execute
as for any exception propagating up the call chain), and provide a
simple syntax for returning from the enclosing method, say
methodname.return foo or to disambiguate Classname.methodname.return
foo (in case you've decided to get baroque and nest anonymous inner
classes, and from a deep down one return from any of the multiple
enclosing contexts).

In practise, I expect the requirement for "final" on the local
variables may be quietly dropped and nothing will be done to support
returning from enclosing contexts, though it could be done, as it just
isn't very useful in typical Java programming (to the point that I've
never used it aside from as proof-of-concept).


.

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