public static EvaluationResult Decrement(EvaluationResult number)
{
if (number == null)
{
throw new ArgumentNullException(nameof(number));
}
if (number.Type == EvaluationType.Int)
{
return(number.AsInt().Value - 1);
}
if (number.Type == EvaluationType.Float)
{
return(number.AsFloat().Value - 1f);
}
throw new Exception("Decrement expects a number");
}