/// <summary>
/// Overflow safe addition of two number values.
///
/// Will not overflow but instead widen the type as necessary. </summary>
/// <param name="a"> left-hand operand </param>
/// <param name="b"> right-hand operand </param>
/// <returns> a + b </returns>
public static NumberValue OverflowSafeAdd(NumberValue a, NumberValue b)
{
if (a is IntegralValue && b is IntegralValue)
{
return(OverflowSafeAdd(a.LongValue(), b.LongValue()));
}
else
{
return(a.Plus(b));
}
}