Lazy Range of Graph Links

[Nordlöw via Digitalmars-d-learn]

On Tuesday, 16 February 2016 at 08:45:42 UTC, Andrea Fontana 
wrote:
> Something like this:
>
> http://dpaste.dzfl.pl/de73cb4e7ac0
>
> ?

Thanks.

Note that this can be simplified by using a variadic version of 
zip...