Subject: Re: The Lisp CPU
From: (Rob Warnock)
Date: Tue, 24 Aug 2004 03:57:52 -0500
Newsgroups: comp.lang.lisp
Message-ID: <>
Frank Buss  <> wrote:
| thanks, this is what I want to implement. No GOTO, even not at the 
| machine level, only a real Lisp CPU with WHILE, IF and PROGN.

By the way, if you allow even one global variable, then with PROGN,
IF, and WHILE you can efficiently emulate *arbitrary* patterns of
spaghetti-code GOTOs. [See William Wulf and Mary Shaw, "Global Variable
Considered Harmful", ACM "SIGPLAN Notices", Vol. 8, Issue 2 (Feb. 1973)



p.s. IMHO, for a "real Lisp CPU" you also need abstraction,
a.k.a. LAMBDA and function call.

Rob Warnock			<>
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