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package defaulting.upperbound;
// This test's sole purpose is to check that implicit and explicit LOWER_BOUND defaulting work as
// expected.
import testlib.defaulting.UpperBoundQual.*;
class MyArrayList<MAL extends String> {}
class MyExplicitArray<MEA extends String> {}
public class UpperBoundDefaulting {
public <UAL extends String> void explicitUpperBoundTypeVar() {
MyArrayList<@UbBottom ? extends @UbBottom Object> eubBottomToBottom =
// :: error: (assignment.type.incompatible)
new MyArrayList<UAL>();
MyArrayList<@UbBottom ? extends @UbExplicit Object> eubExplicitToBottom =
new MyArrayList<UAL>();
// :: error: (type.argument.type.incompatible)
MyArrayList<@UbBottom ? extends @UbImplicit Object> eubImplicitToBottom =
// :: error: (assignment.type.incompatible)
new MyArrayList<UAL>();
}
public void implicitsWildcard(MyArrayList<?> myArrayList) {
// should fail because @LbImplicit is below @UbTop
// :: error: (type.argument.type.incompatible)
@UbTop MyArrayList<@UbBottom ? extends @UbTop String> iwLowerBoundIncompatible = myArrayList;
@UbTop MyArrayList<@UbBottom ? extends @UbExplicit String> iwLowerBoundCompatible = myArrayList;
// :: error: (type.argument.type.incompatible)
@UbTop MyArrayList<@UbBottom ? extends @UbImplicit String> iwLowerBoundStillCompatible =
// :: error: (assignment.type.incompatible)
myArrayList;
}
public void implicitExtendBoundedWildcard(MyArrayList<? extends String> iebList) {
// should fail because @LbImplicit is below @UbTop
// :: error: (type.argument.type.incompatible)
@UbTop MyArrayList<@UbBottom ? extends @UbTop String> iebLowerBoundIncompatible = iebList;
MyArrayList<@UbBottom ? extends @UbExplicit Object> eubExplicitToBottom = iebList;
// :: error: (assignment.type.incompatible) :: error: (type.argument.type.incompatible)
MyArrayList<@UbBottom ? extends @UbImplicit Object> eubImplicitToBottom = iebList;
}
public void explicitLowerBoundedWildcard(MyArrayList<? super String> elbList) {
// should fail because @UbExplicit is below UbTop
// :: error: (type.argument.type.incompatible)
@UbTop MyArrayList<@UbTop ? super @UbBottom String> iebLowerBoundIncompatible = elbList;
// :: error: (type.argument.type.incompatible)
@UbTop MyArrayList<@UbImplicit ? super @UbBottom String> iebLowerBoundStillIncompatible =
// :: error: (assignment.type.incompatible)
elbList;
@UbTop MyArrayList<@UbExplicit ? super @UbBottom String> iebLowerBoundCompatible = elbList;
}
}
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