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From: HenHanna
Newsgroups: comp.lang.lisp,comp.lang.scheme
Subject: Re: on the evolution of lisp
Date: Mon, 17 Jun 2024 00:07:48 -0700
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On 6/16/2024 5:11 PM, Julieta Shem wrote:
> HenHanna writes:
>
>> On 2/2/2024 7:52 AM, Julieta Shem wrote:
>
> [...]
>
>>> (*) Alan Bawden
>>> Hey, Alan! I didn't know who you were. (I like not to know who I'm
>>> talking to.) The document spoke very highly of you. It first mentions
>>> you were in the Commmon Lisp Group and eventually calls you a
>>> backquote-meister. Impressive!
>>> The backquote syntax was particularly powerful when nested. This
>>> occurred primarily within macro-defining macros; because such were
>>> coded primarily by wizards, the ability to write and interpret nested
>>> backquote expressions was soon surrounded by a certain mystique. Alan
>>> Bawden of MIT acquired a particular reputation as backquote-meister in
>>> the early days of the Lisp Machine.
>>> We also learned about synctatic closures. Very cool.
>>
>>
>> yes, he is the backquote-meister --- Checkout his paper on it.
>
> (It's great to have the experts around.)
>
> There are so many papers. I suppose you mean
>
> Bawden, Alan. ``Quasiquotation in Lisp.'' PEPM, 1999.
>
> Thanks.
yes. i think that's the one....
i think there are 2 PDF versions (floating around).
_________________________the following Backquotes aren't really nested.
(define-macro (ave x)
`(/ (+ ,@ (map (lambda (n) `(+ ,@ (make-list n 1))) (cadr x)))
(+ ,@ (map (lambda (n) 1) (cadr x)))))
(print (ave '(1)))
(print (ave '(1 2 3)))
gosh> (macroexpand '(ave '(1 2 3)))
==> (/ (+ (+ 1) (+ 1 1) (+ 1 1 1)) (+ 1 1 1))