import org.checkerframework.checker.initialization.qual.NotOnlyInitialized;
import org.checkerframework.checker.initialization.qual.UnderInitialization;

public class NotOnlyInitializedTest {

    @NotOnlyInitialized NotOnlyInitializedTest f;
    NotOnlyInitializedTest g;

    public NotOnlyInitializedTest() {
        f = new NotOnlyInitializedTest();
        g = new NotOnlyInitializedTest();
    }

    public NotOnlyInitializedTest(char i) {
        // we can store something that is under initialization (like this) in f, but not in g
        f = this;
        // :: error: (assignment.type.incompatible)
        g = this;
    }

    static void testDeref(NotOnlyInitializedTest o) {
        // o is fully iniatlized, so we can dereference its fields
        o.f.toString();
        o.g.toString();
    }

    static void testDeref2(@UnderInitialization NotOnlyInitializedTest o) {
        // o is not fully iniatlized, so we cannot dereference its fields
        // :: error: (dereference.of.nullable)
        o.f.toString();
        // :: error: (dereference.of.nullable)
        o.g.toString();
    }
}