[Python-3000] Pre-peps on raise and except changes

[Nick Coghlan]

Phillip J. Eby wrote:
> The 2-expression "raise" statement translation is incorrect in the general 
> case; it is possible for the second argument to be an instance of the first 
> argument, in which case 'raise E, V' should become just 'raise V'.  This is 
> not detectable by the refactoring tool, AFAIK.

There is another issue which currently isn't entirely clear in this PEP 
or in PEP 352 - what happens to except statements which raise a subtype 
of Exception instead of an instance of it.

It's currently implicit that this will continue to be allowed (with 
subtypes being automatically instantiated with no arguments) - I think 
that behaviour should be explicitly stated as intentional in the new 
Py3k PEP.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
---------------------------------------------------------------
             http://www.boredomandlaziness.org