protected internal override BigNum Absolute()
{
if (_num.Sign == _den.Sign)
{
return(Clone());
}
// hold on, do I need to clone the BigInt instances since everything's immutable anyway?
if (!_num.Sign)
{
BigInt newNum = (BigInt)(-_num);
BigInt newDen = (BigInt)_den.Clone();
return(new BigRational(newNum, newDen));
}
else // then _den must be negative
{
BigInt newNum = (BigInt)_num.Clone();
BigInt newDen = (BigInt)(-_den);
return(new BigRational(newNum, newDen));
}
}
protected override BigNum Negate()
{
BigInt num = (BigInt)(-_num);
return(new BigRational(num, (BigInt)_den.Clone()));
}
