(5.9) attributes incorrectly highlighted as identifiers

[tayloraswift]

in the current 5.9 nightlies, attributes such as @frozen, @inlinable, etc. are incorrectly highlighted as identifiers rather than keywords/attributes. this is a regression from 5.8.

VSCode screenshot:

the identifier coloring is visually jarring and cannot be overridden by changing syntax theme definitions, as they are semantically labeled as identifiers.

please note that the textmate scope classification, while correct, is irrelevant here, as syntax highlight colors are determined entirely from semantic token type.

$ swift --version
Swift version 5.9-dev (LLVM ea47328e7cf304e, Swift 9c3928cc0c738b5)
Target: x86_64-unknown-linux-gnu

[ahoppen]

Tracked in Apple’s issue tracker as rdar://113086754

[ahoppen]

For context: we’re discussing fixing this in swiftlang/swift-syntax#1953 (comment).

[ahoppen]

This should be fixed on main by swiftlang/swift-syntax#1953.