import org.checkerframework.common.util.report.qual.*;

class Accesses {
    class Demo {
        @ReportReadWrite Object read;

        @ReportWrite Object write;

        @ReportCall
        Object foo(Object p) {
            return null;
        }

        void implicitRead() {
            // :: error: (fieldreadwrite)
            Object o = read;
            // A read counts as access
            // :: error: (fieldreadwrite)
            read = null;
            // :: error: (fieldreadwrite)
            read.toString();
        }

        void implicitWrite() {
            Object o = write;
            // :: error: (fieldwrite)
            write = null;
            write.toString();
        }

        void implicitMethod() {
            // :: error: (methodcall)
            foo(null);
            // :: error: (methodcall)
            equals(foo(null));
        }
    }

    void accessesRead(Demo d) {
        // :: error: (fieldreadwrite)
        Object o = d.read;
        // A read counts as access
        // :: error: (fieldreadwrite)
        d.read = null;
        // :: error: (fieldreadwrite)
        d.read.toString();
    }

    void accessesWrite(Demo d) {
        Object o = d.write;
        // :: error: (fieldwrite)
        d.write = null;
        d.write.toString();
    }

    void accessesMethod(Demo d) {
        // :: error: (methodcall)
        d.foo(null);
        // :: error: (methodcall)
        d.equals(d.foo(null));
    }
}