Swift struct type recursive value

Question

Structs can\'t have recursive value types in Swift. So the follow code can\'t compile in Swift

struct A {
    let child: A
}

A value type c

Answer 1

Since child[] can be empty there is no reason why this shouldn't work. This compiles just fine:

struct Foo {
  let child: [Foo]
}

let foo = Foo(child: [Foo(child:[Foo(child:[]), Foo(child:[])])])

Although I don't see any practical use for it – I wonder if there is, though.