Swift class does not conform to Objective-C protocol with error handling -

i have objective-c protocol

@protocol someobjcprotocol - (bool) dosomethingwitherror: (nserror **)error; @end 

and swift class

class swiftclass : someobjcprotocol {     func dosomething() throws {         } } 

compilers gives me error

type 'swiftclass' not conform protocol 'someobjcprotocol'"

is there solution how rid of error? i'm using xcode 7 beta 4

there 2 problems:

• swift 2 maps func dosomething() throws objective-c method - (bool) dosomethingandreturnerror: (nserror **)error;, different protocol method.
• the protocol method must marked "objective-c compatible" @objc attribute.

there 2 possible solutions:

solution 1: rename objective-c protocol method to

@protocol someobjcprotocol - (bool) dosomethingandreturnerror: (nserror **)error; @end 

solution 2: leave objective-c protocol method is, , specify objective-c mapping swift method explicitly:

@objc(dosomethingwitherror:) func dosomething() throws {     // stuff }