From: "Stephen J. Turnbull" <stephen@xemacs.org>
To: Thien-Thi Nguyen <ttn@gnuvola.org>
Cc: emacs-devel@gnu.org
Subject: Re: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...)))
Date: Wed, 05 Jan 2011 10:55:28 +0900 [thread overview]
Message-ID: <878vz0i06n.fsf@uwakimon.sk.tsukuba.ac.jp> (raw)
In-Reply-To: <87tyhoa67u.fsf@ambire.localdomain>
Thien-Thi Nguyen writes:
> - We are already dealing with a construct where the
> treatment of the list is non-uniform (EXPR vs BODY),
> so playing in the "neck" area has precedence: special
> handling of docstring, ‘interactive’ form, indentation
> hints (for ‘defmacro’), etc.
All these occur in a top-level form, though.
> - Functional style is not unlispy.
True, but in the examples so far you could define a macro like
(defmacro applificating-cond (&rest clauses)
"Documentation is all too often left to the reader.
This docstring just follows that custom."
(let ((var (gensym)))
`(let (,var)
(cond ,@(mapcar (lambda (clause) `((setq ,var ,(car clause))
(funcall ,(cdr clause) ,var)))
clauses)))))
and write
(applificating-cond
((cdr list) #'car)
((car list) #'car)
instead of
> (cond
> ((cdr list) => #'car)
> ((car list) => #'car)
No?
> No variables at all!
I do like that. So, do you ever want to write
(cond
((cdr list) => #'car)
((car list) (random-expr-not-needing-value-of-car-list free-var))
or the like? (That makes me feel a little ill, but YMMV.)
next prev parent reply other threads:[~2011-01-05 1:55 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-02 21:45 emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))) Thien-Thi Nguyen
2011-01-02 21:57 ` Fren Zeee
2011-01-02 22:00 ` Fwd: " Fren Zeee
2011-01-02 22:52 ` Harald Hanche-Olsen
2011-01-04 16:41 ` Thien-Thi Nguyen
2011-01-04 17:56 ` Harald Hanche-Olsen
2011-01-04 18:39 ` Thien-Thi Nguyen
2011-01-03 2:19 ` Stefan Monnier
2011-01-04 17:00 ` Thien-Thi Nguyen
2011-01-03 16:15 ` Richard Stallman
2011-01-04 18:12 ` Thien-Thi Nguyen
2011-01-05 1:55 ` Stephen J. Turnbull [this message]
2011-01-05 3:21 ` Thien-Thi Nguyen
2011-01-05 4:16 ` Stephen J. Turnbull
2011-01-05 5:15 ` Miles Bader
2011-01-05 21:29 ` Stefan Monnier
2011-01-05 22:40 ` Harald Hanche-Olsen
2011-01-06 0:10 ` Stefan Monnier
2011-01-06 8:24 ` Helmut Eller
2011-01-07 3:49 ` Stefan Monnier
2011-01-06 18:43 ` Richard Stallman
2011-01-05 23:36 ` Richard Stallman
2011-01-11 17:20 ` Andy Wingo
2011-01-05 5:17 ` Miles Bader
-- strict thread matches above, loose matches on Subject: below --
2011-01-03 5:37 MON KEY
2011-01-04 17:20 ` Thien-Thi Nguyen
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