GNU bug report logs - #61403
30.0.50; C tree-sitter bug?

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From: Po Lu <luangruo <at> yahoo.com>
To: Yuan Fu <casouri <at> gmail.com>
Cc: 61403 <at> debbugs.gnu.org
Subject: bug#61403: 30.0.50; C tree-sitter bug?
Date: Sun, 12 Feb 2023 16:36:10 +0800

Yuan Fu <casouri <at> gmail.com> writes:

> Po Lu <luangruo <at> yahoo.com> writes:
>
>> Go to sfnt.c in the feature/android branch, and turn on c-ts-mode.
>>
>> Then, go to line 10754, around which should be the function definition:
>>
>> /* Load the simple glyph GLYPH into the specified INTERPRETER, scaling
>>    it up by INTERPRETER's scale, and run its glyph program if
>>    present.  Use the unscaled metrics specified in METRICS.
>>
>>    Upon success, return NULL and the resulting points and contours in
>>    *VALUE.  Else, value is the reason interpretation failed.  */
>>
>> TEST_STATIC const char *
>> sfnt_interpret_simple_glyph (struct sfnt_glyph *glyph,
>> 			     struct sfnt_interpreter *interpreter,
>> 			     struct sfnt_glyph_metrics *metrics,
>> 			     struct sfnt_instructed_outline **value)
>> {
>>   size_t zone_size, temp, outline_size, i;
>>   struct sfnt_interpreter_zone *zone;
>>   struct sfnt_interpreter_zone *volatile preserved_zone;
>>   sfnt_f26dot6 phantom_point_1_x;
>>
>> `TEST_STATIC' is fontified as a type.  Perhaps tree-sitter needs
>> something along the lines of `c-noise-macros'?
>
> Would it be reasonable to assume that all caps "type" are almost always
> macros? If it is, we can optionally defontify these kind of "types".

Not really, because an extremely common type is:

    PTR_T *ptr;

where ``PTR_T'' is used to represent pointers on systems that may lack
properly working pointers to void.

The standard library FILE * is also one such type with a capitalized
name.

>>
>> Likewise for _Noreturn:
>>
>> _Noreturn static void
>> sfnt_interpret_trap (struct sfnt_interpreter *interpreter,
>> 		     const char *reason)
>> {
>>
>> _Noreturn is a keyword in 2011 Standard C.  I think the tree-sitter
>> parser definition files should be updated to understand it.
>
> Makes sense. I can file an issue on tree-sitter-c’s repo.

Please do so, and thanks.

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