Operator Overloading in an Abstract Base Class

["Nordlöw" via Digitalmars-d-learn]

On Thursday, 20 November 2014 at 22:10:28 UTC, Nordlöw wrote:
> In my module symbolic.d at
>
> https://github.com/nordlow/justd/blob/master/symbolic.d
>
> is it somehow possible to overload binary operator ~ on pairs 
> of instances SPatt?

As usual I had done a couple of mistakes...which are solved know 
at

https://github.com/nordlow/justd/blob/master/symbolic.d#L63

Why can't I find these bugs before I do my posts? :)