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Conversion to ANSI Common Lisp via FUTURE-COMMON-LISP
Date: Sun, 6 Jan 1991 10:06-0500
From: Charles Hornig <Hornig@RIVERSIDE.SCRC.Symbolics.COM>
Date: Mon, 10 Dec 1990 11:59 EST
DEFSTRUCT -- I assume that FUTURE-COMMON-LISP:DEFSTRUCT is
upward-compatible with LISP:DEFSTRUCT, including its
physical representation of structures.
Thew new DEFSTRUCT's physical representation is not compatible with the
old one if you do not specify the :TYPE argument. The old one used an
array with the named structure bit set, the new one uses an instance.
Thank you. My own experiments showed that old and new DEFSTRUCT types
cannot inherit from each other, either. I'll have to keep the two forms
Lawrence G. Mayka
AT&T Bell Laboratories