/// <summary>
/// Slices the specified array using the specified range.
/// </summary>
public static T[] GetSubArray <T>(T[] array, IntRange range)
{
if (array == null)
{
throw new ArgumentNullException(nameof(array));
}
(int offset, int length) = range.GetOffsetAndLength(array.Length);
if (default(T) != null || typeof(T[]) == array.GetType())
{
// We know the type of the array to be exactly T[].
if (length == 0)
{
return(Array.Empty <T>());
}
var dest = new T[length];
Array.Copy(array, offset, dest, 0, length);
return(dest);
}
else
{
// The array is actually a U[] where U:T.
var dest = (T[])Array.CreateInstance(array.GetType().GetElementType(), length);
Array.Copy(array, offset, dest, 0, length);
return(dest);
}
}