Anonymous class in swift

Question

Is there an equivalent syntax or technique for Anonymous class in Swift? Just for clarification Anonymous class in Java example here - http://docs.oracle.com/javase/tutorial/java/javaOO/anonymousclasses.html

Thanks!

question from:https://stackoverflow.com/questions/24408068/anonymous-class-in-swift

Answer 1

There is no equivalent syntax, as far as I know.

Regarding equivalent techniques, theoretically you could use closures and define structs and classes inside them. Sadly, I can't get this to work in a playground or project without making it crash. Most likely this isn't ready to be used in the current beta.

Something like...

protocol SomeProtocol {
    func hello()
}

let closure : () -> () = {
    class NotSoAnonymousClass : SomeProtocol {
        func hello() {
            println("Hello")
        }
    }
    let object = NotSoAnonymousClass()
    object.hello()
}

...currently outputs this error:

invalid linkage type for global declaration
%swift.full_heapmetadata* @_TMdCFIv4Test7closureFT_T_iU_FT_T_L_19NotSoAnonymousClass
LLVM ERROR: Broken module found, compilation aborted!
Command /Applications/Xcode6-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift failed with exit code 1