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

[Yuan Fu <casouri@gmail.com>]

X-Debug-CC: dev@rjt.dev <mailto:dev@rjt.dev>

(I lied a little bit about on the [PATCH] part: I have a solution but didn’t turn it into a patch yet.)

The problem is follows: given the rust code below, some enum are not fontified with type face under font lock level 3, and those enum are fontified as function or variable under font lock level 4.

fn main() {
    func(MyEnum::VariantA(0));
    func(MyEnum::VariantB);
    func(VariantC);
    func(VariantD(0));
}

VariantA and VariantB are fontified correctly, but VariantC and VariantD are not.

I think a simple rule that fontifies every capitalized identifier would fix this. But I don’t know if that’ll create other problem. AFAIK capitalized identifier is always some type in rust, right?

This is first reported on rust-mode’s GitHub repo: https://github.com/rust-lang/rust-mode/issues/518

Yuan