5 lines
204 B
Java
5 lines
204 B
Java
public sealed interface List<T> permits Cons, Empty {}
|
|
|
|
public record Cons<T>(T a, List<T> l) implements List<T> {}
|
|
public record Empty<T>() implements List<T> {}
|
|
public record Pair<T1, T2>(T1 a, T2 b) {} |