[Rust] Scalar types/primitives are not distinguished from non-primitive types

[uncenter]

What happened?

The TypeScript syntax marks non-primitive types with the support.class scope, and primitive types (e.g. string) with support.type.primitive. Rust scalars/primitives like u32, char, bool, etc are marked as either storage.type or support.type depending on context, which is the same as any other user/library defined type (Box, Result). It would be helpful to be able to differentiate between the two for syntax highlighting.

[deathaxe]

According to scope naming styleguide primitive built-in types are scoped storage.type. Some syntaxes use storage.type.primitive.

Types, provided by libraries are scoped using a support. scope.

According to TextMate rules, all library/user-defined types are scoped support..