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A simple question
- To: navajo!smith%nrl-aic.ARPA@navajo.stanford.edu
- Subject: A simple question
- From: edsel!bhopal!jonl@navajo.stanford.edu (Jon L White)
- Date: Thu, 23 Apr 87 23:23:38 PDT
- Cc: navajo!common-lisp%sail@navajo.stanford.edu, navajo!spears%nrl-aic.arpa@navajo.stanford.edu
- In-reply-to: Russ Smith's message of 23 Apr 1987 13:42:18 EST (Thu)
What is the version number of your Sun Common Lisp ? try calling
(lisp-implementation-version), or look at the initial greeting.
Version 2 (and it's follow-ons) has been current since December 1986,
and doesn't have the pessimization you reported, namely that
(not (not x)) ==> x. Version 1 appears to have the problem.
As has often been remarked, "The source of all bugs is pre-mature
optimization."
-- JonL --