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Re: Object identity

From: Stefan Monnier
Subject: Re: Object identity
Date: Tue, 21 Oct 2003 21:22:09 GMT
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50

>> > Well, either I need weak hash tables, or a different implementation
>> > of object-identity.
>> Given your particular situation, you can just flush your hash-table at the
>> end of print-unreadable-object, so it does not even need to be weak.
> Yes, but that would print eq objects differently between two
> subsequent calls to print-unreadable-object, which probably would
> confuse the user.

Might be confusing, but after all, it's a behavior that can appear
even with a "real" implementation of print-unreadable-object.

Another possibility is to print a random number, which simulates the
behavior were a copying GC is called everytime and moves everything around
all the time.


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