all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
From: David Kastrup <dak@gnu.org>
Subject: Re: Newbie Conditional Problem
Date: 17 Jan 2003 17:52:57 +0100	[thread overview]
Message-ID: <x5vg0nyaza.fsf@lola.goethe.zz> (raw)
In-Reply-To: grWV9.42835$aG4.2479915@twister.austin.rr.com

"CarlC" <carlc@snowbd.com> writes:

> "David Kastrup" <dak@gnu.org> wrote in message
> news:x54r87zrdo.fsf@lola.goethe.zz...
> > Well, what do you expect? (goto-line line) is no function, and you
> > use it in the place of one, namely immediately after an opening
> 
> C-f h goto-line RET shows:
> 
> goto-line is an interactive compiled Lisp function in `simple'.

See?  goto-line is a function.  (goto-line line) is a function call.

> (goto-line ARG)

This is supposed to illustrate how goto-line is called.  A function
call is not the same as a function.

> Goto line ARG, counting from line 1 at beginning of buffer.
> 
> I am new to this. Is it technically a command or function? Can it be
> used immediatly after an opening parenthesis?

goto-line is a function.  It can be "used" immediately after an
opening parenthesis.  This is not what Emacs complained about.  Emacs
complained about using (goto-line line) after an opening
parenthesis.  (goto-line line) is not a function, it is a function
call.

> It seems to work fine outside of this conditional.

No, it doesn't.  (goto-line line) will work fine.
((goto-line line) ...) will not.

> I can put other commands in the conditional and they fail, also.

You don't put them in the conditional.  You put them in the
function call place of a function that you want to have as the body
of the conditional.

> > parenthesis of a non-special form.  I recommend that you instead use
> > progn after the opening parenthesis.  Look it up with
> >
> > C-h f progn RET
> 
> progn is a special form.
> (progn BODY ...)
> 
> Eval BODY forms sequentially and return value of last one.
> 
> This doesn't tell me a whole lot. I get an invalid function using progn,
> also. Is it a function?

(progn (goto-line line) (goto-line line))

would be a valid form.

((goto-line line) (goto-line line))

isn't, and because of the first function call in it which is used as
if it were a function.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

  reply	other threads:[~2003-01-17 16:52 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-01-17 15:19 Newbie Conditional Problem CarlC
2003-01-17 15:36 ` Friedrich Dominicus
2003-01-17 16:09   ` CarlC
2003-01-18  6:27     ` Friedrich Dominicus
2003-01-18 13:35       ` Johan Bockgård
2003-01-18 16:59         ` Friedrich Dominicus
2003-01-18 13:48       ` Christopher J. White
2003-01-18 17:03         ` Friedrich Dominicus
2003-01-17 16:19 ` Brendan Halpin
     [not found] ` <x54r87zrdo.fsf@lola.goethe.zz>
2003-01-17 16:46   ` CarlC
2003-01-17 16:52     ` David Kastrup [this message]
2003-01-17 17:24       ` CarlC
2003-01-17 17:42 ` Stefan Monnier <foo@acm.com>
2003-01-18 17:36 ` Kai Großjohann

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=x5vg0nyaza.fsf@lola.goethe.zz \
    --to=dak@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.