From: Emanuel Berg <moasen@zoho.com>
To: help-gnu-emacs@gnu.org
Subject: Re: How to do a massive unfill paragraph operation over several hundred files?
Date: Mon, 01 Oct 2018 17:12:29 +0200 [thread overview]
Message-ID: <86wor1ya3m.fsf@zoho.com> (raw)
In-Reply-To: mailman.1626.1538404685.1284.help-gnu-emacs@gnu.org
Gerald Wildgruber wrote:
> Yes, that is the whole point I didn't
> understand! What does "ARGS" have to be when
> called non-interactively in a script.
> From the doc string of the function:
>
> (defun unfill-paragraph (&optional region)
> "Takes a multi-line paragraph and makes it into a single line of text."
> (interactive (progn (barf-if-buffer-read-only) '(t)))
> (let ((fill-column (point-max)))
> (fill-paragraph nil region)))
>
> I cannot see what to put here.
When you call that interactively what happens
is `barf-if-buffer-read-only', which
[s]ignal[s] a `buffer-read-only' error if
the current buffer is read-only
but if that doesn't hold (i.e. the buffer isn't
read-only), then "region", the optional
argument, is assigned `t'.
However when you call it from Lisp, NONE of
this happens so "region" remains nil!
Observe:
(defun test-interactive-optional-args (&optional arg)
(interactive (progn (barf-if-buffer-read-only) '(t)))
(message "arg: %s" arg) )
(call-interactively
#'test-interactive-optional-args) ; arg: t
(test-interactive-optional-args) ; arg: nil
(test-interactive-optional-args t) ; arg: t
and of course:
(test-interactive-optional-args nil) ; arg: nil
So in so many words, why don't you pass `t' as
the argument? :)
--
underground experts united
http://user.it.uu.se/~embe8573
next prev parent reply other threads:[~2018-10-01 15:12 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1463.1538170475.1284.help-gnu-emacs@gnu.org>
2018-09-29 11:32 ` How to do a massive unfill paragraph operation over several hundred files? Emanuel Berg
2018-09-29 12:04 ` history of argv (was: Re: How to do a massive unfill paragraph operation over several hundred files?) Emanuel Berg
2018-09-29 12:44 ` Skip Montanaro
2018-09-29 23:20 ` John Yates
[not found] ` <mailman.1503.1538263274.1284.help-gnu-emacs@gnu.org>
2018-09-30 18:20 ` Emanuel Berg
[not found] ` <mailman.1481.1538225108.1284.help-gnu-emacs@gnu.org>
2018-09-29 15:14 ` Emanuel Berg
2018-09-29 18:07 ` Barry Margolin
2018-09-29 21:20 ` James K. Lowden
2018-09-30 19:47 ` How to do a massive unfill paragraph operation over several hundred files? Gerald Wildgruber
[not found] ` <mailman.1577.1538336869.1284.help-gnu-emacs@gnu.org>
2018-09-30 20:28 ` Emanuel Berg
2018-10-01 5:48 ` Gerald Wildgruber
[not found] ` <mailman.1589.1538372941.1284.help-gnu-emacs@gnu.org>
2018-10-01 9:42 ` Emanuel Berg
2018-10-01 14:37 ` Gerald Wildgruber
2018-10-01 15:21 ` Robert Pluim
2018-10-02 12:11 ` Gerald Wildgruber
2018-10-02 15:37 ` Noam Postavsky
2018-10-03 10:11 ` Gerald Wildgruber
2018-10-03 23:52 ` Noam Postavsky
2018-10-08 5:42 ` Gerald Wildgruber
[not found] ` <mailman.1666.1538561477.1284.help-gnu-emacs@gnu.org>
2018-10-03 14:12 ` Emanuel Berg
[not found] ` <mailman.1650.1538482287.1284.help-gnu-emacs@gnu.org>
2018-10-02 15:11 ` Emanuel Berg
[not found] ` <mailman.1626.1538404685.1284.help-gnu-emacs@gnu.org>
2018-10-01 15:12 ` Emanuel Berg [this message]
2018-09-28 8:16 Gerald Wildgruber
2018-09-29 2:04 ` ken
[not found] ` <mailman.1466.1538186663.1284.help-gnu-emacs@gnu.org>
2018-09-29 11:34 ` Emanuel Berg
2018-09-30 5:10 ` Van L
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