Python 2.4 compatibility fixes

[mborch@…]

The attached patch fixes various issues.

These were originally found during development of Chameleon.

[mborch@…]

Diff versus r1096.

[cmlenz]

Okay, looks like decorators was renamed to decorator_list in the AST in Python 2.6, right? So this is really a fix for a compatibility problem with Python 2.6 not 2.4?

Just changing decorators to decorator_list in the code will break decorators under Python versions prior to 2.6 AFAICT, so I think the change needs to look at both names. I'm not sure what your other changes in the patch are supposed to do, can you elaborate on them?

[cmlenz]

I've checked in a different fix for the decorators problem in r1102. Please let me know whether I'm missing any other compatibility problems. Thanks!

[mborch@…]

The AST class did not have the standard constructor (which accepts _fields), and there was no except-handler visitor cloner (so the body and else- if those blocks would not be transformed).

[cmlenz]

Replying to mborch@…:

The AST class did not have the standard constructor (which accepts _fields),

But AFAICT neither did the AST constructor in Python 2.5, so I can't see how this would lead to compatibility problems in Python 2.4.

and there was no except-handler visitor cloner (so the body and else- if those blocks would not be transformed).

Ah, right.

[cmlenz]

AFAICT this should be resolved in trunk now.