is None or == None ?

[Rhodri James]

On Sun, 08 Nov 2009 19:45:31 -0000, Terry Reedy <tjreedy at udel.edu> wrote:

> I believe the use of tagged pointers has been considered and so far  
> rejected by the CPython developers. And no one else that I know of has  
> developed a fork for that. It would seem more feasible with 64 bit  
> pointers where there seem to be spare bits. But CPython will have to  
> support 32 bit machines for several years.

I've seen that mistake made twice (IBM 370 architecture (probably 360 too,  
I'm too young to have used it) and ARM2/ARM3).  I'd rather not see it a  
third time, thank you.

-- 
Rhodri James *-* Wildebeest Herder to the Masses