Re: Object identity

[Lars Brinkhoff]

Stefan Monnier <monnier@iro.umontreal.ca> writes:
> > 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.  I might almost as well print "0" for all object
identities.

Flushing somewhat less often (for some value of "less") would be good
enough, I think.  It's not like all objects are in the hash table, so
the memory overhead isn't large.

-- 
Lars Brinkhoff,         Services for Unix, Linux, GCC, HTTP
Brinkhoff Consulting    http://www.brinkhoff.se/