ProtocolThrowsErrorCompiling.swift

//: Playground - noun: a place where people can play

import Cocoa

var str = "Hello, playground"

@objc protocol Thing {
	
	func doThing(x: String) throws -> String
}

@objc class RealThing: NSObject, Thing {
	
	func doThing(x: String) throws -> String {
		return "didAThing"
	}
}

//Playground execution failed: /var/folders/v2/skmhdwgn26j4xzg89rjnfl7c0000gn/T/./lldb/792/playground36.swift:12:13: error: type 'RealThing' does not conform to protocol 'Thing'
//@objc class RealThing: NSObject, Thing {
//	^
//	/var/folders/v2/skmhdwgn26j4xzg89rjnfl7c0000gn/T/./lldb/792/playground36.swift:9:7: note: protocol requires function 'doThing' with type '(String) throws -> String'
//	func doThing(x: String) throws -> String
//	^
//	/var/folders/v2/skmhdwgn26j4xzg89rjnfl7c0000gn/T/./lldb/792/playground36.swift:14:7: note: Objective-C method 'doThing:error:' provided by method 'doThing' does not match the requirement's selector ('doThing:')
//	func doThing(x: String) throws -> String {