Swift protocols don't attribute a parent ObjC protocol correctly

Originator:lickea
Number:rdar://22785385 Date Originated:21-Sep-2015 11:41 AM
Status:Open Resolved:
Product:Developer Tools Product Version:7.0 (7A220)
Classification: Reproducible:Always
 
Summary:
When an Objective-C protocol is extended by a Swift protocol, the class does not properly conform to the parent protocol. This is language independent.

Steps to Reproduce:
1. Create a Swift protocol
2. Make that Swift protocol extend an Objective-C protocol
3. Implement a class that conforms to the Swift protocol
4. Check conformance to the Objective-C protocol

Expected Results:
The model (or class) conforms to the protocol.

Actual Results:
The model does not conform to the protocol.
This fails using Swift’s `is` and `as` operators, as well as `conformsToProtocol:` in Objective-C.

Notes:
The Objective-C protocol can be defined in either language.
If the class _explicitly_ declares that it implements the protocol, everything works as expected.
Pure swift protocols do not exhibit this behavior.

Comments


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