Poking at Swift Reflect/Mirror

Swift-Reflect-Test

import Foundation

func introspectThing(instance: Any) {
    let mirror = reflect(instance)

    func findDisposition(mirror : Mirror) -> String {
        var returnValue = ""
        switch mirror.disposition {
        case .Aggregate:
            returnValue = "Aggregate"
        case .Class:
            returnValue = "Class"
        case .Container:
            returnValue = "Container"
        case .Enum:
            returnValue = "Enum"
        case .IndexContainer:
            returnValue = "IndexContainer"
        case .KeyContainer:
            returnValue = "KeyContainer"
        case .MembershipContainer:
            returnValue = "MembershipContainer"
        case .Optional:
            returnValue = "Optional"
        case .Struct:
            returnValue = "Struct"
        case .Tuple:
            returnValue = "Tuple"
        }
        return returnValue
    }


    println("Mirror: objectIdentifier = \(mirror.objectIdentifier); mirror.count = \(mirror.count); mirror.summary = \(mirror.summary); mirror.disposition = \(findDisposition(mirror))")

    for index in 0 ..< mirror.count {
        let (childKey, childMirror) = mirror[index]
        println("childKey: \(childKey); childMirror.disposition: \(findDisposition(childMirror))")
    }
}

struct ExampleStruct {
    let x: Int
    let y: Int
    var z: Int {
    get {
        return 0
    }
    set {}
    }
    func doStuff() -> String {
        return "x: \(x); y: \(y)"
    }
}

class ExampleClass {
    let x: Int
    let y: Int
    var z: Int {
    get {
        return 0
    }
    set {}
    }
    init(x: Int, y: Int) {
        self.x = x
        self.y = y
    }
    func doStuff() -> String {
        return "x: \(x); y: \(y)"
    }
}

class ExampleObjcClass : NSObject {
    let x: Int
    var y: Int
    var z: Int {
    get {
        return 0
    }
    set {}
    }
    init(x: Int, y: Int) {
        self.x = x
        self.y = y
    }
    func doStuff() -> String {
        return "x: \(x); y: \(y)"
    }
}

let exampleStruct : ExampleStruct = ExampleStruct(x: 1, y: 2)
let exampleClass = ExampleClass(x: 1, y: 2)
let exampleObjcClass = ExampleObjcClass(x: 1, y: 2)

println("Test Struct")
introspectThing(exampleStruct)
println("Test Class")
introspectThing(exampleClass)
println("Test ObjC Class")
introspectThing(exampleObjcClass)