Fix c-ts-mode indentation (bug#61291)

Fix indentation for the semicolon in

while (str_a[i++] == str_b[j++])
  ;

* lisp/progmodes/c-ts-mode.el (c-ts-mode--indent-styles): New rule.
* test/lisp/progmodes/c-ts-mode-resources/indent.erts: New test.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/lisp/progmodes/c-ts-mode-resources/indent.erts b/test/lisp/progmodes/c-ts-mode-resources/indent.erts
index 6f64e1e7953..2750526f893 100644
--- a/test/lisp/progmodes/c-ts-mode-resources/indent.erts
+++ b/test/lisp/progmodes/c-ts-mode-resources/indent.erts
@@ -144,6 +144,17 @@ int f2(int x,
 };
 =-=-=
 
+Name: Semi-colon in While Loop (bug#61291)
+
+=-=
+while (true)
+  ;
+for (int i = 0;
+     i < 5;
+     i++)
+  ;
+=-=-=
+
 Name: Multiline Block Comments 1 (bug#60270)
 
 =-=