Holly Borla f2b088518c [Concurrency] Implement more precise actor isolation for isolated argument ...

values.

Teach ActorIsolation that a `nil` isolated argument is statically nonisolated,
and a reference to GlobalActor.shared statically has global actor isolation.

This change also models arbitrary actor instance isolation using VarDecls
when possible, which allows comparing two ActorIsolation values that may
represent different actor instances. Previously, ActorIsolation was
modeled only by storing the nominal actor type and the parameter index,
so the actor isolation value for two different actors was considered
to be equal. Now, the nominal actor type is only used for isolated `self`
in cases where there is no implicit self parameter decl, such as for
stored properties.

2024-01-24 20:24:34 -08:00

11 KiB

Raw Blame History

View Raw