From: Thien-Thi Nguyen <ttn@gnuvola.org>
To: emacs-devel@gnu.org
Subject: emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...)))
Date: Sun, 02 Jan 2011 22:45:56 +0100 [thread overview]
Message-ID: <877hengesr.fsf@ambire.localdomain> (raw)
In Scheme, the expression:
(cond (EXPR => (lambda (X) ...)))
provides the lambda expression parameter X with the non-false
value computed from evaluating EXPR. However, if EXPR evaluates
to false, control falls through to the next ‘cond’ clause, as
usual. The syntax requires the symbol ‘=>’ between EXPR and the
lambda expression, without which the non-false value is discarded
(i.e., the status quo).
What do people think of adding this to Emacs Lisp? (I would be
grateful for pointers to any previous discussion on the matter.)
next reply other threads:[~2011-01-02 21:45 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-02 21:45 Thien-Thi Nguyen [this message]
2011-01-02 21:57 ` emacs lisp syntax rfc: (cond (EXPR => (lambda (X) ...))) 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
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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