Check value or reference type in Swift

Question

How to check if a parameter passed by function, value or reference type? for example

func isReferenceType(toTest: Any) {
    return true // or false
}

As we see here, we cannot use these generic generics.

Answer 1

AnyObject is a protocol that automatically matches any type of class, so you can write:

func isReferenceType(toTest: Any) -> Bool {
    return toTest.dynamicType is AnyObject
}

class Foo { }
struct Bar { }

isReferenceType(Foo())    // true
isReferenceType(Bar())    // false
isReferenceType("foo")    // false
isReferenceType(123)      // false
isReferenceType([1,2,3])  // false