[Python-Dev] PEP 3103: A Switch/Case Statement

[Ka-Ping Yee]

On Mon, 26 Jun 2006, Guido van Rossum wrote:
> Most school I proponents (perhaps you're the only exception) have
> claimed that optimization is desirable, but added that it would be
> easy to add hash-based optimization. IMO it's not so easy in the light
> of various failure modes of hash(). (A possible solution would be to
> only use hashing if the expression's type is one of a small set of
> trusted builtins, and not a subclass; we can trust int.__hash__,
> str.__hash__ and a few others.)

That's a good idea!  At first glance, it seems like that could lead to
a plausible compromise.


-- ?!ng