PR #77758 AST: `AvailableAttr` cleanup

AST: Use an accessor to get the PlatformKind from an AvailableAttr.

tshortli committed 294 days ago

AST: Store Platform and PlatformAgnostic in AvailableAttr's bits.

tshortli committed 294 days ago

AST: Adopt AvailableAttr::isLanguageVersionSpecific().

tshortli committed 294 days ago

swift AST: `AvailableAttr` cleanup #77758 Merged