anchor.diff:    Expect.equals(0, one() - one());
   }
   
  +@NoInline()
   void mulTest() {
     var m1 = 0 - 1;
     Expect.equals(0, 0 * 0);
  
positive.code:   Expect.equals(false, m1 > 0);
    Expect.equals(true, 0 > m1);
    Expect.equals(false, m1 > m1);
  }
  
  void greaterEqualTest() {
    var m1 = minus1();
    Expect.equals(false, 1 >= 2);
  
negative.code:   Expect.equals(99, ninetyNine() & ninetyNine());
    Expect.equals(34, four99() & 42);
    Expect.equals(3, minus5() & 7);
  
    Expect.equals(0,  uint31(0x7ffffffe) & uint31(1));
    Expect.equals(0,  asNum(0x7ffffffe) & asNum(1));
  }
  
  @NoInline()
  void orTest() {
    Expect.equals(11, 10 | 3);
    Expect.equals(15, 15 | 7);
  