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Re: NIL and DEFCONSTANT [Gall: Bug Report]
- To: common-lisp@SU-AI.ARPA
- Subject: Re: NIL and DEFCONSTANT [Gall: Bug Report]
- From: Nick Gall <Gall@MIT-MULTICS.ARPA>
- Date: Tue, 2 Apr 85 15:06 EST
- In-reply-to: Message of 28 Mar 85 09:28 EST from "Network_Server.Daemon (Moon@SCRC-STONY-BROOK.ARPA@SU-AI)"
!section 20.1(last-1) Nick Gall 85-03-19
!version Digital Press 1984
!topic Is nil declared by defconstant?
...all constant symbols declared by DEFCONSTANT, such as NIL,
T, and PI.
If NIL is declared by DEFCONSTANT then it can legally be
redefined according to section 5.1.2(last):
Constant symbols defined by DEFCONSTANT ... may be redefined,
if necessary, by using DEFCONSTANT again.
Is such an interpretation correct?
I do not believe that system-supplied constants can legally be redefined.
Is it that my interpretation is incorrect (and if so why?) or is
it that the CLRM is incorrect (and if so how?).