I'm not very familiar with Swift. If I'm understanding right, the `prefix` function being defined is equivalent to LINQ's `TakeWhile` [0]. If so, the C# version

I'm not very familiar with Swift. If I'm understanding right, the `prefix` function being defined is equivalent to LINQ's `TakeWhile` [0]. If so, the C# version seems much easier to read to me: public static IEnumerable<T> TakeWhile<T>( this IEnumerable<T> source, Func<T, bool> predicate) { foreach(T value in source) { if (predicate(value)) yield return value; else yield break; } } Of course, there's a bunch of compiler magic going on here that's basically creating a state machine, which seems to be explicit in the Swift version. Are there any similar features in Swift to C#'s `yield`? If not, are any on the road map? [0] https://msdn.microsoft.com/en-us/library/bb534804%28v=vs.110%29.aspx https://msdn.microsoft.com/en-us/library/bb534804%28v=vs.110...