[Cython] remaining Pyrex changes

[Greg Ewing]

Robert Bradshaw wrote:

> In a.pyx you can do "from b cimport B" and from b.pyx you can do  
> "from a cimport A" without any problems.

There's never been any problem with that in Pyrex, as
far as I know.

The problems occur when .pxd files cimport from each
other, not .pyx files. That's what the recently
added forward declaration features are addressing.

Does Cython have a different way of handling circular
cimports among .pxd files? If so, how does it work?

-- 
Greg