class Cat {} let a: AnyObject = Cat() print(type(of: a)) // Cat
func f() -> Int { return 42 } let a: AnyObject = f as AnyObject print(type(of: a)) // _SwiftValueclass Cat {} let a: AnyObject = Cat() print(type(of: a)) // Cat
func f() -> Int { return 42 } let a: AnyObject = f as AnyObject print(type(of: a)) // _SwiftValue_SwiftValue なる型になってた。