[SE-0470] Infer nonisolated
on conformances
#2893
Merged
+33
−7
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Introduce two inference rules that infer
nonisolated
whenInferIsolatedConformances
is enabled. These inference rules ensure that most conformances that should be nonisolated remain nonisolated, particular when we're in the main-actor-by-default mode. The end result is that much less code needs to change when enabling isolated conformance inference (including via main-actor-by-default mode). The two rules are:SendableMetatype
(including indirectly, e.g., fromSendable
), then the isolated conformance could never be used, so it is inferred to benonisolated
.nonisolated
, the conformance will be assumed to benonisolated
.