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Plists and NIL.
- To: firstname.lastname@example.org
- Subject: Plists and NIL.
- From: email@example.com (D. Loewenstern)
- Date: Thu, 9 Jul 87 09:16:07 EDT
- Cc: dml@NADC.ARPA
1) NIL is a symbol. Like all symbols, it has a plist (see CLtL p.4 for an
2) NIL is a list.
Therefore, does (SETQ z NIL)
(SETF (GETF z :a) :b)
return NIL or (:a :b)? (That is, does the property go on NIL's plist or
directly into the list referenced by z?)
Golden Common LISP (ver. 2.2LM) resolves this by having no plist on NIL. I
consider this a bug, however.