Phillip J. Eby wrote:
> And for the case where the compiler can tell the variable is accessed
> before it's defined, there's definitely something wrong. This code, for
> example, is definitely missing a "global" and the compiler could in
> principle tell:
>
> foo = 1
>
> def bar():
> foo+=1
>
> So I see no problem (in principle, as opposed to implementation) with
> issuing a warning or even a compilation error for that code. (And it's
> wrong even if the snippet I showed is in a nested function definition,
> although the error would be different.)
>
> If I recall correctly, the new compiler uses a control-flow graph that
> could possibly be used to determine whether there is a path on which a
> local could be read before it's stored.
I think symtable.c could wander back up the lexical block stack checking that
target names are defined for augmented assignment statements.
That said, while I'd be happy to review a patch, I'm not going to try to write
one :)
Cheers,
Nick.
--
Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia
---------------------------------------------------------------
http://www.boredomandlaziness.org
_______________________________________________
Python-Dev mailing list
[email protected]
http://mail.python.org/mailman/listinfo/python-dev
Unsubscribe:
http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
