Doug Gregor 776e31d101 Only allow _ObjectiveCBridgeable conformances in the type's defining module. ...

With the exception of a specific whitelist of cases where the
Foundation module defines conformances to _ObjectiveCBridgeable for
standard library types, only permit an _ObjectiveCBridgeable
conformance in the same module as the type that's conforming to the
protocol. Among other things, this prevents the optimizer from
concluding that a dynamic cast between a Swift value type and its
bridged Objective-C class type can never succeed. See

  34ff1c8e6d

for the optimizer issue. As part of this, bring the whitelist in sync
with reality, now that the compiler enforces it.

2016-03-17 16:28:13 -07:00

142 KiB

Raw Blame History

View Raw