TestPrimitive.java

import org.checkerframework.checker.fenum.qual.Fenum;

@SuppressWarnings("fenum:assignment.type.incompatible")
public class TestPrimitive {
    public final @Fenum("A") int ACONST1 = 1;
    public final @Fenum("A") int ACONST2 = 2;
    public final @Fenum("A") int ACONST3 = 3;

    public final @Fenum("B") int BCONST1 = 4;
    public final @Fenum("B") int BCONST2 = 5;
    public final @Fenum("B") int BCONST3 = 6;
}

class FenumUserTestPrimitive {
    @Fenum("A") int state1 = new TestPrimitive().ACONST1;

    @Fenum("A") int state3 = this.state1;

    //:: error: (assignment.type.incompatible)
    @Fenum("B") int state2 = new TestPrimitive().ACONST1;

    void foo(TestPrimitive t) {
        //:: error: (assignment.type.incompatible)
        state1 = 4;

        state1 = t.ACONST2;
        state1 = t.ACONST3;

        //:: error: (assignment.type.incompatible)
        state1 = t.BCONST1;

        if (t.ACONST1 < t.ACONST2) {
            // ok
        }

        //:: error: (binary.type.incompatible)
        if (t.ACONST1 < t.BCONST2) {}
        //:: error: (binary.type.incompatible)
        if (t.ACONST1 == t.BCONST2) {}

        //:: error: (binary.type.incompatible)
        if (t.ACONST1 < 5) {}
        //:: error: (binary.type.incompatible)
        if (t.ACONST1 == 5) {}
    }
}