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Re: Elementary question about backquote in T.
- To: Sanjai Narain <narain@RAND-UNIX>
- Subject: Re: Elementary question about backquote in T.
- From: Jim Meehan <Meehan@YALE.ARPA>
- Date: Thu ,24 Oct 85 14:33:15 EDT
- Cc: T-Users@YALE.ARPA
- In-reply-to: Sanjai Narain <narain@RAND-UNIX.ARPA>, 23 Oct 85 21:59:49 PDT (Wed)
I hope it is okay to send a T question to this list, since I am not aware
of a separate list for T.
Try T-BUGS@YALE or T-USERS@YALE.
If we define:
(define-macro (bar x) `(list ,(car x)))
then (macro-expand '(bar '(1 2)) *scratch-env*) ==> (list quote). That is, an
attempt to evaluate (bar '(1 2)) will give an error to the effect that
quote is unbound.
No mystery. Arguments to macros aren't evaluated. You're taking the
CAR of the list (QUOTE (1 2)), which is the symbol QUOTE.
> (set x '(1 2))
;; x is bound to '(1 2)
No. X is bound to (1 2).