reproduction steps
using Scala 2.13.6, Java 17
sealed and permits commented out due to #12159
public /* sealed */ interface Nat /* permits Nat.Zero, Nat.Succ */ {
public static final record Zero() implements Nat {}
public static final record Succ(Nat pred) implements Nat {}
}
problem
`;` expected but `implements` found.
public static final record Zero() implements Nat {}
The error message is confusing as well, as
public static final record Zero();
does not work, but
public static final record Zero() {}
does.