Hello, Po.

On Sun, Nov 06, 2022 at 15:56:15 +0800, Po Lu via CC-Mode-help wrote:
> Package: cc-mode

> Start with the following text in a c-mode buffer:

> static const struct test_seat_controller_interface seat_controller_impl =
>   {
>     .destroy = DestroyTestSeatController,
>     .bind_seat = BindSeat,
>     .get_XIModifierState = GetXIModifierState,
>     .get_XIButtonState = GetXIButtonState,
>     .get_XIValuatorState = GetXIValuatorState,
>     .dispatch_XI_Enter = DispatchXIEnter,
>     .dispatch_XI_Leave = DispatchXILeave,
>     .dispatch_XI_Motion = DispatchXIMotion,
>     .dispatch_XI_ButtonPress = DispatchXIButtonPress,
>     .dispatch_XI_ButtonRelease = DispatchXIButtonRelease,
>   };

> move point to the end of the line reading ".dispatch_XI_ButtonPress =
> DispatchXIButtonRelease", and then type RET.  At that point,
> "test_seat_controller_interface" will no longer be completely fontified
> as a type.

Yes.  The position inside that identifier where the fontification
stopped was exactly 500 characters back from the start of the new line.
This made it easy to locate a 500 in the Lisp source causing it.  It
turned out to be an off-by-one error.

Would you please apply the attached patch, and confirm the bug is fixed
(or say what's still wrong).

Thanks!

> Emacs  : GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu)
>  of 2022-10-29
> Package: CC Mode 5.35.1 (C/*l)
> Buffer Style: gnu
> c-emacs-features: (pps-extended-state col-0-paren posix-char-classes gen-string-delim gen-comment-delim syntax-properties category-properties 1-bit)

[ .... ]

-- 
Alan Mackenzie (Nuremberg, Germany).