is None or == None ?

Alf P. Steinbach alfps at
Sun Nov 8 07:27:27 CET 2009

* Hrvoje Niksic:
> "Alf P. Steinbach" <alfps at> writes:
>> Speedup would likely be more realistic with normal implementation (not
>> fiddling with bit-fields and stuff)
> I'm not sure I understand this.  How would you implement tagged integers
> without encoding type information in bits of the pointer value?

A normal tag field, as illustrated in code earlier in the thread.

Cheers & hth.,

- Alf

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