(* all arguments are unique/linear *)

Drop = #[lang = Drop] iface ^{
  drop = Λ (_: ^This) → ();
} default .{
  drop = λ (x: ^This) → {
    std.typarts.foreach ^This.parts (λ (t: Type) → λ (v: t) → (Drop t).drop v);
    ()
  };
};

Clone = #[lang = Clone] iface ^{
  inherit Drop;
  clone = Λ (self: &^This) → ^This;
} default .{
  clone = λ (self: &^This) → {
    std.typarts.map ^This.parts (λ (t: Type) → λ (x: t) → (Clone t).clone v);
    ()
  };
};

main = λ {
  std.println "Hello World!";
};