GNU bug report logs - #1912
Reserved word "goto" not highlighted in Ada-mode

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Erik <esigra <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Reserved word "goto" not highlighted in Ada-mode
Date: Thu, 15 Jan 2009 08:51:24 +0100

The reserved word "goto" not highlighted in Ada-mode.

Message #10 received at 1912 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: "Juanma Barranquero" <lekktu <at> gmail.com>
To: Erik <esigra <at> gmail.com>
Cc: 1912 <at> debbugs.gnu.org
Subject: Re: bug#1912: Reserved word "goto" not highlighted in Ada-mode
Date: Thu, 15 Jan 2009 09:58:40 +0100

On Thu, Jan 15, 2009 at 08:51, Erik <esigra <at> gmail.com> wrote:

> The reserved word "goto" not highlighted in Ada-mode.

Which version of Emacs and ada-mode are you using? I see "goto"
highlighted with font-lock-keyword-face, as expected.

Can you send a fragment of Ada code showing the problem?

  Juanma

Message #17 received at 1912 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Erik <esigra <at> gmail.com>
To: Juanma Barranquero <lekktu <at> gmail.com>
Cc: 1912 <at> debbugs.gnu.org
Subject: Re: bug#1912: Reserved word "goto" not highlighted in Ada-mode
Date: Thu, 15 Jan 2009 14:10:28 +0100

Juanma Barranquero skrev:
> On Thu, Jan 15, 2009 at 08:51, Erik <esigra <at> gmail.com> wrote:
>   
>> The reserved word "goto" not highlighted in Ada-mode.
>>     
>
> Which version of Emacs and ada-mode are you using? I see "goto"
> highlighted with font-lock-keyword-face, as expected.
>
>   

GNU Emacs 22.3.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2008-11-15 on localhost

(Gentoo package app-editors/emacs-22.3)

> Can you send a fragment of Ada code showing the problem?
>   

Execute "emacs prov.adb" (in a directory without such a file). Then
write these lines:
procedure Prov
is
begin
    goto done

The reserved words "procedure" "is" and "begin" get highlighted as soon
as they are written. But "goto" is only highlighted if
1. the file is saved at this point,
2. a ';' is written, or
3. a newline is written

Compare this with the similar example
procedure Prov
is
begin
    raise done

Here the reserved word "raise" is highlighted immediately (unlike
"goto"). (But the identifier "done" is not highlighted immediately,
which looks like another bug.)

Message #22 received at 1912 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: "Juanma Barranquero" <lekktu <at> gmail.com>
To: Erik <esigra <at> gmail.com>
Cc: 1912 <at> debbugs.gnu.org
Subject: Re: bug#1912: Reserved word "goto" not highlighted in Ada-mode
Date: Thu, 15 Jan 2009 15:30:27 +0100

On Thu, Jan 15, 2009 at 14:10, Erik <esigra <at> gmail.com> wrote:

> GNU Emacs 22.3.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
> of 2008-11-15 on localhost

I'm testing on 23.0.60 (current trunk from the CVS repository), but
AFAICS, there's no significant difference between the two ada-mode.el
packages that should affect font-locking.

> The reserved words "procedure" "is" and "begin" get highlighted as soon
> as they are written. But "goto" is only highlighted if

> 1. the file is saved at this point,
> 2. a ';' is written, or
> 3. a newline is written

That's not exactly the behavior I see, but I certainly see that goto
is not highlighted after the final "o" is written. The same happens
for "use", for example. That is expected, see the variable
ada-font-lock-keywords.

> Here the reserved word "raise" is highlighted immediately (unlike
> "goto"). (But the identifier "done" is not highlighted immediately,
> which looks like another bug.)

I'm not sure they are bugs. No one said font-locking should be
instantaneous; often some context is needed.

Let's wait for Stephen's opinion.

    Juanma

Message #27 received at 1912-done <at> debbugs.gnu.org (full text, mbox):

From: Stephen Leake <stephen_leake <at> stephe-leake.org>
To: 1912-done <at> debbugs.gnu.org
Subject: Re: bug#1912: Reserved word "goto" not highlighted in Ada-mode
Date: Wed, 13 Jan 2010 02:02:08 -0500

I agree with Juanma's analysis; this is not a bug, it's a feature of
font-lock.

-- 
-- Stephe

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