GNU bug report logs - #75406
31.0.50; [PATCH] csharp-ts-mode does not highlight type in typeof() expressions

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
Subject: bug#75406: closed (Re: bug#75406: 31.0.50; [PATCH] csharp-ts-mode
 does not highlight type in typeof() expressions)
Date: Sat, 01 Feb 2025 11:32:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#75406: 31.0.50; [PATCH] csharp-ts-mode does not highlight type in typeof() expressions

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 75406 <at> debbugs.gnu.org.

-- 
75406: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=75406
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
Cc: casouri <at> gmail.com, jostein <at> fastmail.fm, theo <at> thornhill.no,
 75406-done <at> debbugs.gnu.org
Subject: Re: bug#75406: 31.0.50;
 [PATCH] csharp-ts-mode does not highlight type in typeof() expressions
Date: Sat, 01 Feb 2025 13:30:54 +0200

> Cc: Jostein Kjønigsen <jostein <at> fastmail.fm>,
>  Theodor Thornhill <theo <at> thornhill.no>, 75406 <at> debbugs.gnu.org
> From: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
> Date: Sat, 25 Jan 2025 11:31:37 +0100
> 
> Attached is updated patch which should be compatible with both tree-sitter grammar versions.

Thanks, installed on the master branch, and closing the bug.

[Message part 3 (message/rfc822, inline)]

From: Jostein Kjønigsen <jostein <at> secure.kjonigsen.net>
To: bug-gnu-emacs <at> gnu.org
Cc: Yuan Fu <casouri <at> gmail.com>, Theodor Thornhill <theo <at> thornhill.no>
Subject: 31.0.50; [PATCH] csharp-ts-mode does not highlight type in typeof()
 expressions
Date: Mon, 6 Jan 2025 15:12:14 +0100

[Message part 4 (text/plain, inline)]

Hey everyone.

When using csharp-ts-mode to edit C# files, you may encounter the use of the typeof() operator in typeof()-expressions. The typeof() operater has 1 required parameter, which is always a type-name.

    public class Gnu
    {
        public void Demo()
        {
            var type = typeof(IQueryable);
        }
    }

This type parameter should be fontified using font-lock-type-face. Currently it is not.

There are explicit rules in csharp-ts-mode defined to attempt to fontify this, but they do not seem to be working:

     ,@(when (csharp-ts-mode--test-type-of-expression)
         '((type_of_expression (identifier) @font-lock-type-face))
         '((typeof_expression (identifier) @font-lock-type-face)))

Based on my inspection in treesit-explore mode, I see the grammar reports back these nodes as typeof_expression-nodes, but these rules are not activated because the preceeding (when ...) condition fails.

(defun csharp-ts-mode--test-type-of-expression ()
  "Return non-nil if (type_of_expression) is in the grammar."
  (ignore-errors
    (treesit-query-compile 'c-sharp "(type_of_expression)" t)
    t))

Changing this implementation to the following (matching the node-names I see in treesit-explore mode) makes highlighting work for me:

(defun csharp-ts-mode--test-type-of-expression ()
  "Return non-nil if (type_of_expression) is in the grammar."
  (ignore-errors
    (treesit-query-compile 'c-sharp "(typeof_expression)" t)
    t))

Attached is a patch which provides this change.

Note: This bug/fix was reproduced using tree-sitter-c-sharp grammar built on December 18th, 2024. I haven't tested with other versions.

Kind regards
Jostein




--


In GNU Emacs 31.0.50 (build 5, aarch64-apple-darwin24.0.0, NS
 appkit-2566.00 Version 15.0.1 (Build 24A348)) of 2024-12-11 built on
 SOK67R3KWV97
Repository revision: a9bc12318121acb513a5735f641602001510a932
Repository branch: master
Windowing system distributor 'Apple', version 10.3.2566
System Description:  macOS 15.0.1

Configured using:
 'configure --with-tree-sitter --with-native-compilation --with-json
 --with-imagemagick
 PKG_CONFIG_PATH=:/usr/local/lib/pkgconfig:/opt/local/lib/pkgconfig'

Configured features:
ACL GLIB GNUTLS IMAGEMAGICK LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY
KQUEUE NS PDUMPER PNG RSVG SQLITE3 THREADS TOOLKIT_SCROLL_BARS
TREE_SITTER WEBP XIM ZLIB

Important settings:
  value of $LC_ALL: en_US.UTF-8
  value of $LC_CTYPE: UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: C#

Minor modes in effect:
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  server-mode: t
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  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  minibuffer-regexp-mode: t
  column-number-mode: t
  line-number-mode: t
  auto-fill-function: #[128 \304\300\301#\207 [yas--auto-fill do-auto-fill :around nil apply] 5 advice]
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  hs-minor-mode: t

Load-path shadows:
/Users/josteink/.emacs.d/elpa/transient-20240421.1327/transient hides /Users/josteink/build/emacs/lisp/transient
/Users/josteink/.emacs.d/elpa/editorconfig-20240318.2049/editorconfig hides /Users/josteink/build/emacs/lisp/editorconfig
/Users/josteink/.emacs.d/elpa/editorconfig-20240318.2049/editorconfig-conf-mode hides /Users/josteink/build/emacs/lisp/editorconfig-conf-mode
/Users/josteink/.emacs.d/elpa/editorconfig-20240318.2049/editorconfig-core hides /Users/josteink/build/emacs/lisp/editorconfig-core
/Users/josteink/.emacs.d/elpa/editorconfig-20240318.2049/editorconfig-core-handle hides /Users/josteink/build/emacs/lisp/editorconfig-core-handle
/Users/josteink/.emacs.d/elpa/editorconfig-20240318.2049/editorconfig-fnmatch hides /Users/josteink/build/emacs/lisp/editorconfig-fnmatch

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Memory information:
((conses 16 1340125 283321) (symbols 48 53880 0)
 (strings 32 314514 8847) (string-bytes 1 9290186) (vectors 16 109175)
 (vector-slots 8 2175883 319679) (floats 8 1370 14387)
 (intervals 56 38780 7503) (buffers 992 60))



—
Kind Regards
Jostein Kjønigsen

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[0001-lisp-progmodes-csharp-mode.el-Fix-fontification-of-t.patch (application/octet-stream, attachment)]

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