Issue1046.java

// Test case for Issue 1046:
// https://github.com/typetools/checker-framework/issues/1046
// Addtional test case: checker/tests/nullness/java8/Issue1046.java

import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;

public class Issue1046 {
    interface MyInterface {}

    class MyClass implements MyInterface {}

    class Function<T> {}

    abstract static class NotSubtype2 {
        static void transform(Function<? super MyClass> q) {}

        static void transform2(Function<? super @Nullable MyClass> q) {}

        void test1(Function<? super MyInterface> p, Function<? super @Nullable MyInterface> p2) {
            transform(p);
            //:: error: (argument.type.incompatible)
            transform2(p);
            transform(p2);
            transform2(p2);
        }

        @Nullable Function<Object> NULL = null;

        <T> void test2(@Nullable Function<? super @NonNull T> queue) {
            Function<? super @NonNull T> x = (queue == null) ? NULL : queue;
        }
    }
}