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From: "Lennart Borgman (gmail)" <lennart.borgman@gmail.com>
To: Nick Roberts <nickrob@snap.net.nz>
Cc: Emacs Devel <emacs-devel@gnu.org>
Subject: Re: To be a list or not
Date: Sat, 29 Dec 2007 01:18:34 +0100	[thread overview]
Message-ID: <4775925A.6020300@gmail.com> (raw)
In-Reply-To: <18293.35504.41211.784522@kahikatea.snap.net.nz>

Nick Roberts wrote:
 >  > Eh, yes but (sequencep '(prop . val)) also returns t at least in my
 >  > version of Emacs. But maybe this has been changed?
 >
 > I don't know what point you are making but all lists are sequences, so
 > if listp returns t so must sequencep.

You cited the following from the manual:

 >  -- Function: length sequence
 >      This function returns the number of elements in SEQUENCE.  If
 >      SEQUENCE is a dotted list, a `wrong-type-argument' error is
 >      signaled.

However (sequencp '(prop . val)) returns t.

What I wanted to know was the recommended way to check if something is a 
cons cell, but not a sequence, ie something like '(prop . val).

Thanks for the pointer to the manual.

  reply	other threads:[~2007-12-29  0:18 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-28 21:20 To be a list or not Lennart Borgman (gmail)
2007-12-28 21:40 ` Eric Hanchrow
2007-12-28 21:47 ` Nick Roberts
2007-12-28 23:05   ` Lennart Borgman (gmail)
2007-12-28 23:45     ` Nick Roberts
2007-12-29  0:18       ` Lennart Borgman (gmail) [this message]
2007-12-29  3:35         ` Bob Rogers
2007-12-29 21:11           ` Stephen J. Turnbull
2007-12-29 22:40             ` Miles Bader
2007-12-29 22:44             ` Tom Tromey
2007-12-29 23:22               ` Andreas Schwab
2007-12-31 16:38                 ` Tom Tromey
2007-12-31 17:13                   ` Andreas Schwab
2007-12-30  0:54               ` Stephen J. Turnbull
2007-12-30  3:52                 ` Bob Rogers
2007-12-30  1:37               ` Richard Stallman
2007-12-29 17:49     ` Richard Stallman
2007-12-29 13:51 ` Richard Stallman
2007-12-29 14:30   ` Thien-Thi Nguyen

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