public static IntegerNumber operator -(IntegerNumber a, IntegerNumber b)
{
if (!Functional.BothAreEqual(a, b, HierarchyLevel.INTEGER))
{
return(Number.OpSub(a, b) as IntegerNumber);
}
return(new IntegerNumber(CtxSubtract(a.Value, b.Value)));
}
public static RationalNumber operator -(RationalNumber a, RationalNumber b)
{
if (!Functional.BothAreEqual(a, b, HierarchyLevel.RATIONAL))
{
return(Number.OpSub(a, b) as RationalNumber);
}
var num = CtxSubtract(CtxMultiply(a.Numerator, b.Denominator), CtxMultiply(b.Numerator, a.Denominator));
var den = CtxMultiply(a.Denominator, b.Denominator);
return(Number.Functional.Downcast(new RationalNumber(num, den)) as RationalNumber);
}
public static ComplexNumber operator -(ComplexNumber a, ComplexNumber b)
{
if (!Functional.BothAreEqual(a, b, HierarchyLevel.COMPLEX))
{
return(Number.OpSub(a, b) as ComplexNumber);
}
var Re = a.Real - b.Real;
var Im = a.Imaginary - b.Imaginary;
return(Number.Functional.Downcast(new ComplexNumber(Re, Im)) as ComplexNumber);
}
public static RealNumber operator -(RealNumber a, RealNumber b)
{
if (!a.IsDefinite() || !b.IsDefinite())
{
return(UndefinedStateSuperSwitch.Switch(
() => new RealNumber(UndefinedState.NAN),
() => new RealNumber(UndefinedState.NAN),
() => new RealNumber(UndefinedState.NEGATIVE_INFINITY),
() => new RealNumber(UndefinedState.POSITIVE_INFINITY),
() => new RealNumber(UndefinedState.POSITIVE_INFINITY),
() => new RealNumber(UndefinedState.NEGATIVE_INFINITY),
() => new RealNumber(UndefinedState.NEGATIVE_INFINITY),
() => new RealNumber(UndefinedState.POSITIVE_INFINITY),
a, b));
}
if (!Functional.BothAreEqual(a, b, HierarchyLevel.REAL))
{
return(Number.OpSub(a, b) as RealNumber);
}
return(Number.Functional.Downcast(new RealNumber(CtxSubtract(a.Value, b.Value))) as RealNumber);
}