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Re: () as an expression

To: scheme@mc.lcs.mit.edu
Subject: Re: () as an expression
From: Roderic Taylor <snorkelwacker!apple!vsi1!roderic@bloom-beacon.mit.edu>
Date: Tue ,23 Jan 90 16:30:35 EDT
Organization: Vicom Systems Inc., San Jose, CA
References: <1990Jan16.193134.10491@sun.soe.clarkson.edu>
Sender: scheme-request@mc.lcs.mit.edu

In a recent article Jason Coughlin (jk0@sun.soe.clarkson.edu) writes:

=
=Why is () an invalid expression?  It seems to me that it is a constant.
=

   () is not a constant.  '() is a constant (at least in the sense
you're thinking).  This is the way Lisp works with all lists, not
just the empty one.

                                            --Roderic T

References:
- () as an expression
  - From: Jason Coughlin <image.soe.clarkson.edu!jk0@uunet.uu.net>

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