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() as an expression
- To: Scheme@lcs.mit.edu
- Subject: () as an expression
- From: Guy Steele <email@example.com>
- Date: Wed ,24 Jan 90 12:20:48 EDT
- Cc: firstname.lastname@example.org
- In-reply-to: Automatic Scheme Digestifier's message of 24 Jan 90 02:15:06 EST <DIGEST.184.900124.021506.32@MC.LCS.MIT.EDU>
Date: 23 Jan 90 20:30:35 GMT
>From: Roderic Taylor <email@example.com>
In a recent article Jason Coughlin (firstname.lastname@example.org) 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.
Begging your pardon, but this is the way *Scheme* works with all lists.
As dearly as we may love Scheme, we must recognize that there are
other dialects of Lisp, some of greater seniority.