Robert Goldman writes (2009-Jul-09):

(Replying to an older posting,)

> I'd rather have us handle slot-unbound on those optional parts of the
> system instead of stuffing a bunch of NILs in there.

Well, if you do not initialize slots with NIL, how can people know when
it's safe to call an accessor?

Checking SLOT-BOUNDP would mean that users have to know about internal
implementation issues: the slot names. 

In ASDF, it's especially icky because slots tend to have different names
than accessors, so you really have to look into the source.

  -T.


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