[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
- To: email@example.com
- Subject: nested backquotes
- From: gls@Think.COM
- Date: Wed, 16 Nov 88 17:56:34 EST
- Cc: gls@Think.COM, firstname.lastname@example.org, email@example.com
- In-reply-to: Don Cohen's message of Wed, 16 Nov 88 11:54:30 PST <8811161954.AA03714@vaxa.isi.edu>
Posted-Date: Wed, 16 Nov 88 11:54:30 PST
Date: Wed, 16 Nov 88 11:54:30 PST
From: Don Cohen <firstname.lastname@example.org>
I agree that my model does not handle this case.
I had a hard time seeing how your model does.
The Greenwald explanation gives me a hint of how to
interpret CLtL. I think what I was missing was the
idea that [,,x] would be interpreted by treating the
inner comma as part of the form in the outer comma,
e.g., [(comma (comma x))] => (list (comma x)).
Just to test my new interpretation, does this look right?
(setq x '(y z))
`(append [,@,@x] 'nil) =>
`(append ,@x 'nil) =>
(append [append] [,@x] ['nil] nil) =>
(append (list 'append) x (list ''nil) nil)
which evaluates to (APPEND Y Z 'NIL)