[cxx-interop] Foreign reference types should not satisfy : AnyObject constraint#90015
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[cxx-interop] Foreign reference types should not satisfy : AnyObject constraint#90015egorzhdan wants to merge 1 commit into
: AnyObject constraint#90015egorzhdan wants to merge 1 commit into
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…` constraint
```
protocol RequiresAnyObject : AnyObject {}
extension MyFRT : RequiresAnyObject {}
```
This should trigger a compiler error, since foreign reference types do not conform to `AnyObject` – they use custom reference counting mechanism.
As a side effect of this change, `Unmanaged<MyFRT>` now also triggers a compiler error. `Unmanaged` requires its wrapped type to be `AnyObject`. Swift allowed its usage with foreign reference types, however, that was an oversight.
rdar://179825120
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egorzhdan
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Xazax-hun
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Jun 17, 2026
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This should trigger a compiler error, since foreign reference types do not conform to
AnyObject– they use custom reference counting mechanism.As a side effect of this change,
Unmanaged<MyFRT>now also triggers a compiler error.Unmanagedrequires its wrapped type to beAnyObject. Swift allowed its usage with foreign reference types, however, that was an oversight.rdar://179825120