Polymorphic recursive class

[Jack Applegame via Digitalmars-d]

On Monday, 13 July 2015 at 12:53:12 UTC, deadalnix wrote:
> On Monday, 13 July 2015 at 11:36:48 UTC, Jack Applegame wrote:
>> Yes, that is I intended.
>> It is a pretty useless example, just for demonstrating the 
>> lack of support polymorphic recursive data types.
>
> So the point is that we should add feature to the language to 
> support useless use cases ?

Not all cases are useless. For example, typical functional 
programming patterns like recursive compile-time trees and lists.