Open Radar

 
Summary:
I can make a generic protocol in Swift that has an associated type (see section on Generics in Swift book). I can then make my own types that conform to that protocol:

For example, here's the protocol:

	protocol PointType {
		typealias ScalarType
	
		var x:ScalarType { get }
		var y:ScalarType { get }
		}

Here's a struct:
 
	struct IntPoint {
		var x:Int
		var y:Int
	}
 
And here's where I make the struct conform to the protocol:
 
	extension IntPoint : PointType {
		typealias ScalarType = Int
	}
 
Groovy! Unfortunately when I try to make CGPoint conform to the protocol swiftc crashes:
 
	extension CGPoint : PointType {
		typealias ScalarType = CGFloat
	}

This _should_ work. As far as I should care - CGPoint is just a swift struct (obviously under the hood it is more complex than this)

Steps to Reproduce:
See description.

Expected Results:
Swiftc should not crash and I should be able to make CGPoint confirm to a protocol w/associated types

Actual Results:
Crash!

Version:
Xcode Version 6.2 (6C107a)

Occurs in 6.1.1 too

Notes:


Configuration:


Attachments:
'PointType.swift' was successfully uploaded.