emacs-29 480f41c7de 1/2: Add < and > to the syntax table in c++-ts-mode (bug#60049)

[Yuan Fu]

branch: emacs-29
commit 480f41c7deb4d3a45a862a5308950b35085f835d
Author: Daniel Martín <mardani29@yahoo.es>
Commit: Yuan Fu <casouri@gmail.com>

    Add < and > to the syntax table in c++-ts-mode (bug#60049)
    
    * lisp/progmodes/c-ts-mode.el (c++-ts-mode--syntax-table): Add a
    specific syntax table for C++.  Consider "<" and ">" open/close
    delimiters (C++ templates).
    (c++-ts-mode): Use the new syntax table.
---
 lisp/progmodes/c-ts-mode.el | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lisp/progmodes/c-ts-mode.el b/lisp/progmodes/c-ts-mode.el
index 4cf06e10eb..821e8f5fd9 100644
--- a/lisp/progmodes/c-ts-mode.el
+++ b/lisp/progmodes/c-ts-mode.el
@@ -83,6 +83,14 @@ follows the form of `treesit-simple-indent-rules'."
     table)
   "Syntax table for `c-ts-mode'.")
 
+(defvar c++-ts-mode--syntax-table
+  (let ((table (make-syntax-table c-ts-mode--syntax-table)))
+    ;; Template delimiters.
+    (modify-syntax-entry ?<  "("     table)
+    (modify-syntax-entry ?>  ")"     table)
+    table)
+  "Syntax table for `c++-ts-mode'.")
+
 (defun c-ts-mode--indent-styles (mode)
   "Indent rules supported by `c-ts-mode'.
 MODE is either `c' or `cpp'."
@@ -616,6 +624,7 @@ the subtrees."
 (define-derived-mode c++-ts-mode c-ts-base-mode "C++"
   "Major mode for editing C++, powered by tree-sitter."
   :group 'c++
+  :syntax-table c++-ts-mode--syntax-table
 
   (unless (treesit-ready-p 'cpp)
     (error "Tree-sitter for C++ isn't available"))