ECMA-335 SpecialName-based operator overloading in PowerShell classes

MagicNumber.class.ps1

class MagicNumber
{
  hidden [int] $_value

  MagicNumber([int]$value)
  {
      $this._value = $value
  }

  # ECMA-335 I.10.3.2
  static hidden
  [MagicNumber] op_Addition([MagicNumber]$a, [MagicNumber]$b)
  {
    return [MagicNumber]::new($a._value + $b._value)
  }

  # ECMA-335 I.10.3.3
  static hidden 
  [int] op_Implicit([MagicNumber]$n)
  {
    return $n._value
  }

  [string]
  ToString()
  {
    return "Zero One Two Three Four Five Six Seven Eight Nine".Split()[$this._value % 10]
  }
}