import org.checkerframework.checker.tainting.qual.PolyTainted;
import org.checkerframework.checker.tainting.qual.Tainted;
import org.checkerframework.checker.tainting.qual.Untainted;
import org.checkerframework.framework.qual.HasQualifierParameter;

@HasQualifierParameter(Tainted.class)
public class PolyConstructor {

  @PolyTainted PolyConstructor() {}

  @PolyTainted PolyConstructor(@PolyTainted Object o) {}

  static void uses(@Tainted Object tainted, @Untainted Object untainted) {
    @Untainted PolyConstructor o1 = new @Untainted PolyConstructor();
    @Tainted PolyConstructor o2 = new @Tainted PolyConstructor();
    @PolyTainted PolyConstructor o3 = new @PolyTainted PolyConstructor();

    // :: error: (assignment)
    @Untainted PolyConstructor o4 = new @Tainted PolyConstructor(untainted);
    @Untainted PolyConstructor o5 = new PolyConstructor(untainted);

    // This currently isn't supported, but could be in the future.
    @Untainted PolyConstructor o6 = new PolyConstructor();
    // :: error: (assignment)
    @Tainted PolyConstructor o7 = new PolyConstructor();
  }
}