Entry.java

package project;

import java.util.*;
import org.overture.codegen.runtime.*;
import org.overture.codegen.vdm2jml.runtime.*;

@SuppressWarnings("all")
//@ nullable_by_default

final public class Entry {
  /*@ public ghost static boolean invChecksOn = true; @*/

  private Entry() {}

  public static Object Run() {

    IO.println("Before valid use");
    {
      Number e = 2L;
      //@ assert ((e == null) || Utils.is_nat(e) && inv_Entry_Even(e));

      e = null;
      //@ assert ((e == null) || Utils.is_nat(e) && inv_Entry_Even(e));

    }

    IO.println("After valid use");
    IO.println("Before invalid use");
    {
      Number e = 2L;
      //@ assert (Utils.is_nat(e) && inv_Entry_Even(e));

      e = Nil();
      //@ assert (Utils.is_nat(e) && inv_Entry_Even(e));

    }

    IO.println("After invalid use");
    return 0L;
  }
  /*@ pure @*/

  public static Number Nil() {

    Number ret_1 = null;
    //@ assert ((ret_1 == null) || Utils.is_nat(ret_1) && inv_Entry_Even(ret_1));

    return ret_1;
  }

  public String toString() {

    return "Entry{}";
  }

  /*@ pure @*/
  /*@ helper @*/

  public static Boolean inv_Entry_Even(final Object check_e) {

    Number e = ((Number) check_e);

    return Utils.equals(Utils.mod(e.longValue(), 2L), 0L);
  }
}