FieldShadowing.java

import org.checkerframework.dataflow.qual.Pure;
import org.checkerframework.framework.qual.RequiresQualifier;
import org.checkerframework.framework.test.*;
import testlib.util.*;

// various tests for the precondition mechanism
class FieldShadowing {

    String f;

    class Sub extends FieldShadowing {
        String f;

        @Pure
        @RequiresQualifier(expression = "f", qualifier = Odd.class)
        int reqSub() {
            @Odd String l2 = f;
            //:: error: (assignment.type.incompatible)
            @Odd String l1 = super.f;
            int i;
            i = 1;
            return 1;
        }

        @Pure
        @RequiresQualifier(expression = "super.f", qualifier = Odd.class)
        int reqSuper() {
            //:: error: (assignment.type.incompatible)
            @Odd String l2 = f;
            @Odd String l1 = super.f;
            return 1;
        }

        void t1(@Odd String p1) {
            f = p1;
            //:: error: (contracts.precondition.not.satisfied)
            reqSuper();
            reqSub();
        }

        void t2(@Odd String p1) {
            super.f = p1;
            //:: error: (contracts.precondition.not.satisfied)
            reqSub();
            reqSuper();
        }
    }
}