GNU bug report logs - #18378
wrong fontification of Java code

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From: Stefan Kangas <stefan <at> marxist.se>
To: Alan Mackenzie <acm <at> muc.de>
Cc: Jordon Biondo <jordonbiondo <at> gmail.com>, 18378 <at> debbugs.gnu.org, Paul Pogonyshev <pogonyshev <at> gmail.com>
Subject: bug#18378: [Patch] wrong fontification of Java code
Date: Mon, 20 Jan 2020 22:16:46 +0100

Hi Alan,

Could you please help review the below patch for cc-fonts.el?

Thanks in advance.

Best regards,
Stefan Kangas

Paul Pogonyshev <pogonyshev <at> gmail.com> writes:

> class X
> {
>     public void x ()
>     {
>         for (int this_is_not_a_function_name : getX ()) {
>         }
>     }
> }
>
> In current trunk (compiled five minutes ago)
> 'this_is_not_a_function_name' above is fontified as a function
> name. This seems to depend on whether I have '()' after 'getX' or
> not.
>
> Paul

Jordon Biondo <jordonbiondo <at> gmail.com> writes:

> I have a potential solution for this bug, as it has impacted me as well.
>
> Not sure what the best solution would be but I have included a patch that does
> solve the problem. From what I can tell there are no tests for java
> fortification but I have not seen any issues arising in my own java
> projects. The issue was that in java, a “:” can mark the end of a declaration in
> a foreach, not just a “;” or “,”.
>
> === modified file 'lisp/ChangeLog'
> *** lisp/ChangeLog	2014-09-01 15:03:45 +0000
> --- lisp/ChangeLog	2014-09-01 19:11:46 +0000
> ***************
> *** 1,3 ****
> --- 1,8 ----
> + 2014-09-01  Jordon Biondo  <jordonbiondo <at> gmail.com>
> + 
> + 	* progmodes/cc-fonts.el (c-font-lock-declarators): Special
> + 	case for declarations inside Java foreach loops (Bug#18378)
> + 
>   2014-09-01  Eli Zaretskii  <eliz <at> gnu.org>
>   
>   	* ls-lisp.el (ls-lisp-use-string-collate)
>
> === modified file 'lisp/progmodes/cc-fonts.el'
> *** lisp/progmodes/cc-fonts.el	2014-08-24 20:50:11 +0000
> --- lisp/progmodes/cc-fonts.el	2014-09-01 19:11:59 +0000
> *************** casts and declarations are fontified.  U
> *** 1116,1123 ****
>   	    ;; initializing brace lists.
>   	    (let (found)
>   	      (while
> ! 		  (and (setq found (c-syntactic-re-search-forward
> ! 			     "[;,]\\|\\s)\\|\\'\\|\\(=\\|\\s(\\)" limit t t))
>   		       (eq (char-before) ?\[)
>   		       (c-go-up-list-forward))
>   		     (setq brackets-after-id t))
> --- 1116,1128 ----
>   	    ;; initializing brace lists.
>   	    (let (found)
>   	      (while
> !                   (and (setq found (c-syntactic-re-search-forward
> !                                     (concat "[;,]\\|\\s)\\|\\'\\|\\(=\\|"
> !                                             (if (c-major-mode-is 'java-mode)
> !                                                 ":\\|"
> !                                               "")
> !                                             "\\s(\\)")
> !                                     limit t t))
>   		       (eq (char-before) ?\[)
>   		       (c-go-up-list-forward))
>   		     (setq brackets-after-id t))

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