GNU bug report logs - #8169
23.2; wrong fontification in gdb-script

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Tom Tromey <tromey <at> redhat.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 23.2; wrong fontification in gdb-script
Date: Thu, 03 Mar 2011 14:03:26 -0700

Visit a file named .gdbinit and enter:

define something
  echo hi
  # a comment
end

Notice that "end" is incorrect given the comment face.

This happens due to some logic in gdb-script-syntax-propertize-function.
It overrides the comment-end syntax on the newline.  But, this is
only really ok if the newline is actually part of a "document" command.

I looked at this a little but didn't see a simple way to fix it.




In GNU Emacs 23.2.1 (i386-redhat-linux-gnu, GTK+ Version 2.20.1)
 of 2010-06-03 on x86-07.phx2.fedoraproject.org
Windowing system distributor `Fedora Project', version 11.0.10802000
configured using `configure  '--build=i386-redhat-linux-gnu' '--host=i386-redhat-linux-gnu' '--program-prefix=' '--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-dbus' '--with-gif' '--with-jpeg' '--with-png' '--with-rsvg' '--with-tiff' '--with-xft' '--with-xpm' '--with-x-toolkit=gtk' 'build_alias=i386-redhat-linux-gnu' 'host_alias=i386-redhat-linux-gnu' 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom -fasynchronous-unwind-tables''

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Tom

Message #8 received at 8169 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Tom Tromey <tromey <at> redhat.com>
Cc: 8169 <at> debbugs.gnu.org
Subject: Re: bug#8169: 23.2; wrong fontification in gdb-script
Date: Thu, 03 Mar 2011 23:49:10 -0500

>>>>> "Tom" == Tom Tromey <tromey <at> redhat.com> writes:

> Visit a file named .gdbinit and enter:

> define something
>   echo hi
>   # a comment
> end

> Notice that "end" is incorrect given the comment face.

> This happens due to some logic in gdb-script-syntax-propertize-function.
> It overrides the comment-end syntax on the newline.  But, this is
> only really ok if the newline is actually part of a "document" command.

Good point.  The patch below fixes this case, I think.


        Stefan "can't commit right now"


=== modified file 'lisp/progmodes/gud.el'
--- lisp/progmodes/gud.el	2011-01-25 20:26:05 +0000
+++ lisp/progmodes/gud.el	2011-03-04 04:47:29 +0000
@@ -3128,7 +3128,9 @@
    ("^document\\s-.*\\(\n\\)" (1 "< b"))
    ("^end\\(\\>\\)"
     (1 (ignore
-        (unless (eq (match-beginning 0) (point-min))
+        (when (and (> (match-beginning 0) (point-min))
+                   (eq 1 (nth 7 (save-excursion
+                                  (syntax-ppss (1- (match-beginning 0)))))))
           ;; We change the \n in front, which is more difficult, but results
           ;; in better highlighting.  If the doc is empty, the single \n is
           ;; both the beginning and the end of the docstring, which can't be

Message #11 received at 8169 <at> debbugs.gnu.org (full text, mbox):

From: Tom Tromey <tromey <at> redhat.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 8169 <at> debbugs.gnu.org
Subject: Re: bug#8169: 23.2; wrong fontification in gdb-script
Date: Fri, 04 Mar 2011 08:37:03 -0700

Stefan> Good point.  The patch below fixes this case, I think.

Thanks.  I tried this and it works for the case I sent.  However, I
think it now fails on:

document something
this is some text
end

Now it gives "end" the string face.  In fact, it doesn't seem to
recognize the "end" at all any more, subsequent lines are also fontified
as strings.

Tom

Message #14 received at 8169 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Tom Tromey <tromey <at> redhat.com>
Cc: 8169 <at> debbugs.gnu.org
Subject: Re: bug#8169: 23.2; wrong fontification in gdb-script
Date: Sun, 06 Mar 2011 15:49:36 -0500

> document something
> this is some text
> end

> Now it gives "end" the string face.  In fact, it doesn't seem to
> recognize the "end" at all any more, subsequent lines are also fontified
> as strings.

Are you testing it in Emacs-23 maybe, where (nth 7 (syntax-ppss)) never
return 1?


        Stefan

Message #19 received at 8169-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Tom Tromey <tromey <at> redhat.com>
Cc: 8169-done <at> debbugs.gnu.org
Subject: Re: bug#8169: 23.2; wrong fontification in gdb-script
Date: Sun, 06 Mar 2011 15:58:35 -0500

Version: 24.1

> Good point.  The patch below fixes this case, I think.

Installed,


        Stefan

Message #22 received at 8169 <at> debbugs.gnu.org (full text, mbox):

From: Tom Tromey <tromey <at> redhat.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 8169 <at> debbugs.gnu.org
Subject: Re: bug#8169: 23.2; wrong fontification in gdb-script
Date: Mon, 07 Mar 2011 07:44:22 -0700

Stefan> Are you testing it in Emacs-23 maybe, where (nth 7 (syntax-ppss)) never
Stefan> return 1?

It was some kind of operator error, since I updated and tried your
latest, and it works.

Tom

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