[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: subtypep questions

    Date: Thu, 22 Jun 89 9:18:42 CDT
    From: bmiller@shamash.cdc.com (Brad Miller - EMD)

The basic answers to your questions are that PCL can't implement all of
CLOS portably.  In particular, parts of CLOS which require changes to
the way a pre-existing Common Lisp function are difficult to implement
portably.  TYPE-OF and SUBTYPEP are examples of these.

Let me stress again that any new user of PCL should take the time to
read through ALL OF THE OLD xxx-notes.text files.  I know this seems
tedious, but it is the best way to get an idea of what PCL is and isn't
wrt to the CLOS specification.