bug#59720: 30.0.50; python-ts-mode: match/case is not fontified properly

bug#59720: 30.0.50; python-ts-mode: match/case is not fontified properly

[Mickey Petersen]

1. Visit a python file. It will use the regular python mode.
2. Write:

    def foo():
         match foo:
             case 10:
                 pass

3. It is highlighted correctly: match and case are fontified with `font-lock-keyword-face'.
4. Type M-x python-ts-mode.
5. Highlighting is now off for match/case. Text properties for the `m' character are:

    Character code properties: customize what to show
      name: LATIN SMALL LETTER M
      general-category: Ll (Letter, Lowercase)
      decomposition: (109) ('m')
      uppercase: 77 (M)
      titlecase: 77 (M)

    There are text properties here:
      fontified            t




In GNU Emacs 30.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version
 3.24.20, cairo version 1.16.0) of 2022-11-29 built on mickey-work
Repository revision: 7939184f8e0370e7a3397d492812c6d202c2a193
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Ubuntu 20.04.3 LTS

Configured using:
 'configure --with-native-compilation --with-json --with-mailutils
 --without-compress-install --with-imagemagick CC=gcc-10'
Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2
M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE
XIM XINPUT2 XPM GTK3 ZLIB
Important settings:
  value of $LC_MONETARY: en_GB.UTF-8
  value of $LC_NUMERIC: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: EL


Memory information:
((conses 16 1470611 151650)
 (symbols 48 83975 12)
 (strings 32 412115 14879)
 (string-bytes 1 12040593)
 (vectors 16 146926)
 (vector-slots 8 3669783 89353)
 (floats 8 829 511)
 (intervals 56 18032 4083)
 (buffers 992 58))

bug#59720: 30.0.50; python-ts-mode: match/case is not fontified properly

[Daniel Martín via Bug reports for GNU Emacs, the Swiss army knife of text editors]

[-- Attachment #1: Type: text/plain, Size: 857 bytes --]

Mickey Petersen <mickey@masteringemacs.org> writes:

> 1. Visit a python file. It will use the regular python mode.
> 2. Write:
>
>     def foo():
>          match foo:
>              case 10:
>                  pass
>
> 3. It is highlighted correctly: match and case are fontified with `font-lock-keyword-face'.
> 4. Type M-x python-ts-mode.
> 5. Highlighting is now off for match/case. Text properties for the `m' character are:
>
>     Character code properties: customize what to show
>       name: LATIN SMALL LETTER M
>       general-category: Ll (Letter, Lowercase)
>       decomposition: (109) ('m')
>       uppercase: 77 (M)
>       titlecase: 77 (M)
>
>     There are text properties here:
>       fontified            t
>

The following patch solves the issue by adding "case" and "match" to the
list of keywords that python-ts-mode recognizes.


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-Add-case-and-match-to-python-treesit-keywords.patch --]
[-- Type: text/x-patch, Size: 1194 bytes --]

From 6d0a98f7d55e04713c395b25b51e737489c394a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Mart=C3=ADn?= <mardani29@yahoo.es>
Date: Wed, 30 Nov 2022 16:11:46 +0100
Subject: [PATCH] Add case and match to python--treesit-keywords

* lisp/progmodes/python.el (python--treesit-keywords): Add "case" and
"match" keywords.
---
 lisp/progmodes/python.el | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
index acfee21135..d02ab92121 100644
--- a/lisp/progmodes/python.el
+++ b/lisp/progmodes/python.el
@@ -962,9 +962,9 @@ python-dotty-syntax-table
 ;; merge with `python-font-lock-keywords-level-2'.
 
 (defvar python--treesit-keywords
-  '("as" "assert" "async" "await" "break" "class" "continue" "def"
+  '("as" "assert" "async" "await" "break" "case" "class" "continue" "def"
     "del" "elif" "else" "except" "exec" "finally" "for" "from"
-    "global" "if" "import" "lambda" "nonlocal" "pass" "print"
+    "global" "if" "import" "lambda" "match" "nonlocal" "pass" "print"
     "raise" "return" "try" "while" "with" "yield"
     ;; These are technically operators, but we fontify them as
     ;; keywords.
-- 
2.34.1

bug#59720: 30.0.50; python-ts-mode: match/case is not fontified properly

[Yuan Fu]

Daniel Martín <mardani29@yahoo.es> writes:

> Mickey Petersen <mickey@masteringemacs.org> writes:
>
>> 1. Visit a python file. It will use the regular python mode.
>> 2. Write:
>>
>>     def foo():
>>          match foo:
>>              case 10:
>>                  pass
>>
>> 3. It is highlighted correctly: match and case are fontified with `font-lock-keyword-face'.
>> 4. Type M-x python-ts-mode.
>> 5. Highlighting is now off for match/case. Text properties for the `m' character are:
>>
>>     Character code properties: customize what to show
>>       name: LATIN SMALL LETTER M
>>       general-category: Ll (Letter, Lowercase)
>>       decomposition: (109) ('m')
>>       uppercase: 77 (M)
>>       titlecase: 77 (M)
>>
>>     There are text properties here:
>>       fontified            t
>>
>
> The following patch solves the issue by adding "case" and "match" to the
> list of keywords that python-ts-mode recognizes.

Applied, thanks!

Yuan