public static bool operator ==(Number a, Number b)
{
if (a is null && b is null)
{
return(true);
}
if (a is null || b is null)
{
return(false);
}
(a, b, _) = Functional.MakeEqual(a, b);
if (a.IsReal() && b.IsReal())
{
var aAsReal = (a as RealNumber);
var bAsReal = (b as RealNumber);
if (!aAsReal.IsDefinite() && !bAsReal.IsDefinite())
{
return(aAsReal.State == bAsReal.State);
}
else if (!aAsReal.IsDefinite() || !bAsReal.IsDefinite())
{
return(false);
}
// else both are defined
}
if (a.Type != b.Type)
{
return(false);
}
return(SuperSwitch(
num => IntegerNumber.AreEqual(num[0], num[1]),
num => RationalNumber.AreEqual(num[0], num[1]),
num => RealNumber.AreEqual(num[0], num[1]),
num => ComplexNumber.AreEqual(num[0], num[1]),
a.Type,
a, b
));
}
internal static bool AreEqual(RationalNumber a, RationalNumber b) => a.Numerator == b.Numerator && a.Denominator == b.Denominator && a.State == b.State;