private Variance calculateArgumentProjectionKindFromSuper(
      @NotNull TypeProjection argument,
      @NotNull List<TypeProjectionAndVariance> projectionsFromSuper) {
    Set<Variance> projectionKindsInSuper = Sets.newLinkedHashSet();
    for (TypeProjectionAndVariance projectionAndVariance : projectionsFromSuper) {
      projectionKindsInSuper.add(projectionAndVariance.typeProjection.getProjectionKind());
    }

    Variance defaultProjectionKind = argument.getProjectionKind();
    if (projectionKindsInSuper.size() == 0) {
      return defaultProjectionKind;
    } else if (projectionKindsInSuper.size() == 1) {
      Variance projectionKindInSuper = projectionKindsInSuper.iterator().next();
      if (defaultProjectionKind == INVARIANT || defaultProjectionKind == projectionKindInSuper) {
        return projectionKindInSuper;
      } else {
        reportError(
            "Incompatible projection kinds in type arguments of super methods' return types: "
                + projectionsFromSuper
                + ", defined in current: "
                + argument);
        return defaultProjectionKind;
      }
    } else {
      reportError(
          "Incompatible projection kinds in type arguments of super methods' return types: "
              + projectionsFromSuper);
      return defaultProjectionKind;
    }
  }
Example #2
0
 @Override
 public boolean hasExpectedTypeMismatch() {
   return errorConstraintPositions.size() == 1
       && errorConstraintPositions.contains(ConstraintPosition.EXPECTED_TYPE_POSITION);
 }