public static IEnumerator <V> AsEnumerator <V, T>(T source)
{
if (typeof(T) == typeof(IEnumerator <V>))
{
return((IEnumerator <V>)source);
}
if (typeof(T) == typeof(IEnumerable <V>))
{
return(((IEnumerable <V>)source).GetEnumerator());
}
if (typeof(T) == typeof(V))
{
return(Source.Constant((V)(object)source));
}
if (typeof(T) == typeof(Func <V>))
{
return(Source.Function((Func <V>)(object) source));
}
throw new ArgumentException($"Expected {typeof(V).FullName} but was: {typeof(T).FullName}");
}
public static IEnumerator <V> Constant <V>(V val)
{
return(Source.Constant(val));
}