[SR-15655] objc protocol cannot use colon-class notation

[mattneub]

Previous ID	SR-15655
Radar	None
Original Reporter	@mattneub
Type	Bug

Environment

Xcode Version 13.2 (13C90)

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug
Assignee	None
Priority	Medium

md5: 15e306cc9a1942747f443aef8af72401

Issue Description:

This is legal:

    protocol NavigationBarNeeder: UIView {}

This is not legal:

    @objc protocol NavigationBarNeeder: UIView {}

You have to say this instead, for the second one:

    @objc protocol NavigationBarNeeder where Self: UIView {}

But why? It's only an alternate notation, after all.