[Python-Dev] For Python 3k, drop default/implicit hash, and comparison
rhamph at gmail.com
Sun Nov 27 01:25:15 CET 2005
On 11/26/05, Noam Raphael <noamraph at gmail.com> wrote:
> [...stuff about using Ref() for identity dictionaries...]
I too have thought along these lines, but I went one step further.
There is an existing function that could be modified to produce Ref
Making id() into a type allows it force unsignedness, incorporate a
method for easy printing, maintain a reference to the target so that
"id(x.foo) == id(x.bar)" doesn't risk reusing the same id.. and the id
object would be the same size as an int object is today. I don't see
any disadvantage, except perhaps code that assumes id() returns an
int. That could be fixed by having id() subclass int for a few
versions while we transition, although that may require we store the
pointer seperate from the integer value.
id() would be usable in dicts as a value, behaving as Noam suggests
that Ref behave. Kills two birds with one stone.
Adam Olsen, aka Rhamphoryncus
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