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() {

    Number n = 0L;
    //@ assert ((n == null) || Utils.is_nat(n));

    IO.println("Before valid use.");
    n = 1L;
    //@ assert ((n == null) || Utils.is_nat(n));

    n = null;
    //@ assert ((n == null) || Utils.is_nat(n));

    IO.println("After valid use.");
    IO.println("Before invalid use.");
    n = idNat(n);
    //@ assert ((n == null) || Utils.is_nat(n));

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

  public static Number idNat(final Number x) {

    //@ assert Utils.is_nat(x);

    Number ret_1 = x;
    //@ assert Utils.is_nat(ret_1);

    return ret_1;
  }

  public String toString() {

    return "Entry{}";
  }
}