/// <summary>
/// Add and normalize
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <returns></returns>
public static Rational <T, TPolicy> operator +(Rational <T, TPolicy> a, Rational <T, TPolicy> b)
{
if (Policy.IsZero(a.Numerator))
{
return(b);
}
if (Policy.IsZero(b.Numerator))
{
return(a);
}
if (Policy.IsOne(a.Denominator) && Policy.IsOne(b.Denominator))
{
return(new Rational <T, TPolicy>(Policy.Add(a.Numerator, b.Numerator), a.Denominator));
}
var d = Policy.Lcd(a.Denominator, b.Denominator);
var an = Policy.Mul(a.Numerator, (Policy.Div(d, a.Denominator)));
var bn = Policy.Mul(b.Numerator, (Policy.Div(d, b.Denominator)));
return(new Rational <T, TPolicy>(Policy.Add(an, bn), d).Normalize());
}