/// <summary>
/// Makes a typed comparer from the given comparer.
/// </summary>
/// <typeparam name="T">The type of items the comparer should compare.</typeparam>
/// <param name="comparer">The comparer to convert to a typed comparer.</param>
/// <returns>A typed comparer.</returns>
/// <exception cref="System.ArgumentNullException">The comparer is null.</exception>
public static IComparer <T> Typed <T>(this IComparer comparer)
{
if (comparer == null)
{
throw new ArgumentNullException("comparer");
}
return(TypedComparer <T> .GetComparer(comparer));
}
public static IComparer GetComparer(IComparer <T> comparer)
{
TypedComparer <T> typed = comparer as TypedComparer <T>;
if (typed != null)
{
return(typed.Comparer);
}
IComparer untyped = comparer as IComparer;
if (untyped != null)
{
return(untyped);
}
return(new UntypedComparer <T>(comparer));
}