import java.util.function.BiFunction;

/** Fails to compile on purpose: you cannot mix var and explicit types in one lambda's parameters. */
public class VarWithoutLambda {
    public static void main(String[] args) {
        BiFunction<Integer, Integer, Integer> f = (var a, Integer b) -> a + b;
        System.out.println(f.apply(1, 2));
    }
}