* M-; : comment-column gets overridden by fill-column. Is this the Right Thing?
@ 2010-05-22 15:17 Alan Mackenzie
2010-05-23 1:15 ` Stefan Monnier
0 siblings, 1 reply; 2+ messages in thread
From: Alan Mackenzie @ 2010-05-22 15:17 UTC (permalink / raw)
To: emacs-devel
Hi, Emacs,
In a recent request for help from Michael Massmann on gnu.emacs.help,
he wants comments to be at column 100, but was unable to make M-; do
this.
He'd set comment column to 100, and had tried playing around with the
comment configuration in CC Mode, all to no avail.
M-; invokes comment-dwim calls comment-indent, which starts by putting
an empty comment at col 100. It's not finished, though.
comment-indent then calls comment-choose-indent, which returns 72.
comment-indent then repositions the empty comment to col 72. :-(
comment-choose-indent (which might better be called
comment-chews-indent ;-) makes the comment fit inside fill-column,
despite the fact that auto-fill-mode isn't enabled. This is surely not
the right thing. Should c-c-indent use fill-column when auto-fill-mode
is enabled?
Surely the documentation for M-; should mention fill-column?
Why is this comment stuff in such a mess?
--
Alan Mackenzie (Nuremberg, Germany).
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: M-; : comment-column gets overridden by fill-column. Is this the Right Thing?
2010-05-22 15:17 M-; : comment-column gets overridden by fill-column. Is this the Right Thing? Alan Mackenzie
@ 2010-05-23 1:15 ` Stefan Monnier
0 siblings, 0 replies; 2+ messages in thread
From: Stefan Monnier @ 2010-05-23 1:15 UTC (permalink / raw)
To: Alan Mackenzie; +Cc: emacs-devel
> comment-choose-indent (which might better be called
> comment-chews-indent ;-) makes the comment fit inside fill-column,
> despite the fact that auto-fill-mode isn't enabled. This is surely not
> the right thing. Should c-c-indent use fill-column when auto-fill-mode
> is enabled?
We can do two things:
- ignore fill-column if it's smaller than comment-column.
That's a pretty "obviously safe" choice which would solve the problem
of the OP.
- only obey fill-column if auto-fill-mode is enabled.
The second choice is an incompatible change and would force me to enable
auto-fill-mode in my programming modes (and then set
comment-auto-fill-only-comments to avoid the annoying "fill code"
behavior), but it seems reasonable.
> Surely the documentation for M-; should mention fill-column?
As long as it doesn't mention comment-column, I don't see why it should
mention fill-column.
> Why is this comment stuff in such a mess?
What mess?
Stefan
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-05-22 15:17 M-; : comment-column gets overridden by fill-column. Is this the Right Thing? Alan Mackenzie
2010-05-23 1:15 ` Stefan Monnier
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