checker/tests/mustcall/Subtype0.java

// A test that the @InheritedMustCall declaration annotation works correctly.

import org.checkerframework.checker.mustcall.qual.*;

@InheritableMustCall("a")
public class Subtype0 {

  public class Subtype1 extends Subtype0 {
    void m1() {}
  }

  public class Subtype2 extends Subtype1 {}

  static void test(
      @Owning Subtype0 s0,
      @Owning Subtype1 s1,
      @Owning Subtype2 s2,
      @Owning Subtype3 s3,
      @Owning Subtype4 s4) {
    // :: error: assignment
    @MustCall({}) Object obj1 = s0;
    @MustCall({"a"}) Object obj2 = s0;

    // :: error: assignment
    @MustCall({}) Object obj3 = s1;
    @MustCall({"a"}) Object obj4 = s1;

    // :: error: assignment
    @MustCall({}) Object obj5 = s2;
    @MustCall({"a"}) Object obj6 = s2;

    @MustCall({}) Object obj7 = s3;
    @MustCall({"a"}) Object obj8 = s3;

    @MustCall({}) Object obj9 = s4;
    @MustCall({"a"}) Object obj10 = s4;
  }

  @MustCall({})
  // :: error: inconsistent.mustcall.subtype :: error: super.invocation
  public class Subtype3 extends Subtype0 {}

  @InheritableMustCall({})
  // :: error: super.invocation
  public class Subtype4 extends Subtype0 {}

  @MustCall({"a"}) public class Subtype5 extends Subtype0 {}

  @InheritableMustCall({"a"})
  public class Subtype6 extends Subtype0 {}

  public class Container {
    Subtype0 in;

    void test() {
      if (in instanceof Subtype1) {
        ((Subtype1) in).m1();
      }
    }
  }
}