/// <summary>
/// Returns the next representable value after x in the direction of y.
/// </summary>
/// <param name="x">the value to get the next of</param>
/// <param name="y">direction</param>
/// <returns>
/// The next floating point value in the direction of y
/// <para>If x == NaN || x == Infinity, returns NaN</para>
/// <para>If y == NaN, returns NaN</para>
/// <para>If y > x, returns FloatNext(x)</para>
/// <para>If y = x, returns x</para>
/// <para>If y < x, returns FloatPrior(x)</para>
/// </returns>
public static double Nextafter(double x, double y)
{
if ((double.IsNaN(x) || double.IsInfinity(x)) ||
(double.IsNaN(y)))
{
Policies.ReportDomainError("Nextafter(x: {0}, y: {1}): Requires finite x, y not NaN", x, y);
return(double.NaN);
}
if (y > x)
{
return(Math2.FloatNext(x));
}
if (y == x)
{
return(x);
}
return(Math2.FloatPrior(x));
}
