Open Radar

 
Summary:
If I create a class in Swift, I will usually expose it to Objective-C with a different name, to allow for prefixing. So far, so good. However, if I make an extension of the class, it no longer builds. The reason being that, while the original class name changed for Objective-C, the extension's class name did not change...

Steps to Reproduce:
1. Create a project that is using both Swift and Objective-C.

2. Paste the following class and extension into some Swift file:

@objc(MyProjectMyClass)
class MyClass: NSObject { }

extension MyClass { }

3. Include MyProject-Swift.h in one of the Objective-C files

4. Try to build the project.

5. Look at the errors; specifically the MyProject-Swift.h header. The problem area in question looks like this: 

SWIFT_CLASS_NAMED("MyClass")
@interface MyProjectMyClass : NSObject
- (nonnull instancetype)init OBJC_DESIGNATED_INITIALIZER;
@end


@interface MyClass (SWIFT_EXTENSION(MyProject))
@end



Expected Results:
I would expect it to rename the extension to be the same as the class itself, and be able to compile.

Actual Results:
It creates an extension off of a class that does not exist, and accordingly fails to compile ><

Version:
Mac OS X 10.10.4 (14E46)
Xcode 7 beta 4 (7A165t)