[Python-3000] Class Decorators + ctypes (Was: yes to class decorators)

[Greg Ewing]

Talin wrote:

> One unresolved issue is what exactly gets assigned to 'x' and 'y' at the 
> time the class definition is evaluated.

Seems to me it ought to be some kind of descriptor.
It might be possible to do this reasonably without
any new syntax, e.g.

   @cstruct
   class MyStruct:
     x = cfield("f")
     y = cfield("f")

given a function cfield() that returns a suitable
descriptor.

> A different approach would be to say that the class decorator can 
> overload the '__setattr__' method on the class itself during class creation:

But it doesn't work that way -- class attributes don't
go through __setattr__ during class creation. They go
into a dict that is passed to the type object's
constructor. The class doesn't even exist while the
class body is being evaluated.

--
Greg