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bug#69625: 30.0.50; [PATCH] rust-ts-mode doesn't fontify some enum


From: Stefan Kangas
Subject: bug#69625: 30.0.50; [PATCH] rust-ts-mode doesn't fontify some enum
Date: Sat, 22 Jun 2024 04:07:07 -0700

Yuan Fu <casouri@gmail.com> writes:

>> On Mar 14, 2024, at 6:52 PM, Dmitry Gutov <dmitry@gutov.dev> wrote:
>>
>> On 09/03/2024 05:50, Randy Taylor wrote:
>>> VariantA gets highlighted as a type and not a function at level 3 because 
>>> that
>>> level doesn't support functions, but does support types. Maybe that could be
>>> considered a bug in that it shouldn't be highlighted at all for level 3?
>>
>> Probably.
>>
>>> I'm not sure how worth it would be to do something about that though, or how
>>> easy.
>>
>> Same. I haven't looked into it.
>>
>>> For VariantC, our (and tree-sitter's) best guess is that it's a variable.
>>> We can't really know it's a type without guessing - like assuming a 
>>> capitalized
>>> identifier is a type, and I don't think that's something we can assume. 
>>> People
>>> can have capitalized functions and variables even if that goes against 
>>> Rust's
>>> usual style. Perhaps as a compromise we could introduce a variable (or 
>>> something)
>>> that lets the user specify that all capitalized identifiers should be 
>>> treated as
>>> types? Maybe it even makes sense to default it to that behaviour since I 
>>> believe
>>> most Rust code follows that style.
>>
>> We do have some rules already that are based off whether an identifier is 
>> capitalized. I.e. some for use_as_clause, and another for highlighting an 
>> identifier with font-lock-constant-face if it's ALL_CAPS. So it might be 
>> logical to carry on with that approach.
>>
>> If the style is consistent enough across the ecosystem, of course.
>>
>> We could add a variable too, but that'd make the rules more complex so it 
>> would be helpful to understand first whether there are users who would 
>> benefit.
>
> For some reason I couldn’t see Randy’s messages. So sorry if I missed 
> anything. I suggest we go ahead with guessing and add the variable if enough 
> people complain. Personally speaking I believe the vast majority of Rust 
> community wouldn’t write Rust code with capitalized variable and 
> non-capitalized types. The Rust community is very much inclined to the 
> standard style, AFAICT.

Yuan, did you make any progress here?





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