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bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment fa
From: |
Alan Mackenzie |
Subject: |
bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face |
Date: |
Wed, 7 Sep 2011 18:14:29 +0000 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Hi, all.
On Wed, Sep 07, 2011 at 05:01:47PM +0000, Alan Mackenzie wrote:
> > emacs -Q
> > C-x C-f foo.awk RET
> > Type "# something" (without quotes). The comment is not highlighted
> > in the font-lock-comment face, as expected. comment-start and
> > comment-start-skip seem to have reasonable values.
> A bit of binary chopping shows that the bug first became visible after
> this change:
> revno: 104401
> committer: Chong Yidong <cyd@stupidchicken.com>
> branch nick: trunk
> timestamp: Sat 2011-05-28 13:16:54 -0400
> message:
> Make CC modes inherit from prog-mode.
> * lisp/progmodes/cc-mode.el (c-mode, c++-mode, objc-mode, java-mode)
> (idl-mode, pike-mode, awk-mode): Inherit from prog-mode.
> I cannot see anything in the change with looks remotely suspicious,
> however. Except, of course, that AWK Mode is now constructed by a macro
> of some complexity, doubly invoked.
I think I see the problem, it's with the macro `define-derived-mode'.
This creates an empty syntax table with (defvar awk-mode-syntax-table),
and does this before cc-awk.elc has been loaded. This thus stuffs the
proper definition of awk-mode-syntax-table.
Because of this, ?# doesn't have the open-comment syntax flag, thus
comments can't get fontified.
If I'm right about this, a solution would be to insert
(makunbound 'awk-mode-syntax-table)
at the top of the mode initialisation. Why on earth does
`define-derived-mode' have the temerity to create an empty, thus useless,
syntax table? Maybe this should be taken out of the macro.
> Deleting cc-fonts.elc (thus allowing cc-fonts.el to be loaded) gets
> fontification of AWK comments working for me, too.
I still don't have a clue why this is happening.
--
Alan Mackenzie (Nuremberg, Germany).
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Eli Zaretskii, 2011/09/06
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Glenn Morris, 2011/09/07
- bug#9448: asdf, Alan Mackenzie, 2011/09/07
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face,
Alan Mackenzie <=
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Stefan Monnier, 2011/09/07
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Glenn Morris, 2011/09/08
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Alan Mackenzie, 2011/09/08
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Glenn Morris, 2011/09/08
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Alan Mackenzie, 2011/09/08
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Eli Zaretskii, 2011/09/09
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Alan Mackenzie, 2011/09/09
- bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Alan Mackenzie, 2011/09/09
bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Glenn Morris, 2011/09/07
bug#9448: 24.0.50; Comments in Awk scripts not fontified with comment face, Glenn Morris, 2011/09/08