[Python-Dev] [Python-checkins] peps: Add PEP 422: Dynamic Class Decorators

[Jan Kaliszewski]

Terry Reedy dixit (2012-06-05, 12:42):

> On 6/5/2012 8:09 AM, nick.coghlan wrote:
> 
> >   Add PEP 422: Dynamic Class Decorators
[snip]
> >+So too will the following be roughly equivalent (aside from inheritance)::
> >+
> >+    class C:
> >+        __decorators__ = [deco2, deco1]
> 
> I think you should just store the decorators in the correct order of use
> +        __decorators__ = [deco1, deco2]
> and avoid the nonsense (time-waste) of making an indirect copy via
> list_iterator and reversing it each time the attribute is used.

+1.  For @-syntax the inverted order seems to be somehow natural.  But I
feel the list order should not mimic that...

***

Another idea: what about...

    @@dynamic_deco2
    @@dynamic_deco1
    class C:
        pass

...being an equivalent of:

    class C:
        __decorators__ = [dynamic_deco1, dynamic_deco2]

...as well as of:

    @@dynamic_deco2
    class C:
        __decorators__ = [dynamic_deco1]

?

Cheers.
*j