[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

*To*: Marc Feeley <feeley@iro.umontreal.ca>, rrrs-authors@martigny.ai.mit.edu*Subject*: Re: quasiquotation semantics*From*: KenD@apple.com (Ken Dickey)*Date*: Mon, 7 Aug 1995 11:55:19 -0700

At 12:33 PM 95/08/7 -0400, Marc Feeley wrote: >Suppose I write the following quasiquote expression: `(a ,X b ,Y) > >Is it equivalent to: > (list 'a X 'b Y) >or > (cons 'a (cons X (cons 'b (cons Y '())))) In implementations I am familiar with, the second, explicit cons, form is always used. Another interpretation is (roughly): (let ( (temp (cons 'a (cons #f (cons 'b (cons #f '())))) ) ) (setf (cadr temp) X) (setf (caddr temp Y) temp ) where temp is shared amoung all invocations of the quasiquoted form, but I don't know of any implementations which do this. If we standardize something we should use the most common implementation (perhaps JARs?). Cheers, -Ken

**Follow-Ups**:**Re: quasiquotation semantics***From:*Matthias Blume <blume@hip.atr.co.jp>

- Prev by Date:
**quasiquotation semantics** - Next by Date:
**Re: quasiquotation semantics** - Prev by thread:
**quasiquotation semantics** - Next by thread:
**Re: quasiquotation semantics** - Index(es):