Code fails with linker error. Why?

[eles via Digitalmars-d-learn]

On Saturday, 4 October 2014 at 09:39:12 UTC, Chris 
Nicholson-Sauls wrote:
> In the original you are casting an int to a pointer type, which 
> is legitimate (although rarely a good idea).  The other side of 
> the matter is simply precedence.
>
> cast(T)a.b;
>
> Is really the same as:
>
> cast(T)(a.b);

But this also means that the cast is useless there, so there is 
no compile-time binding, so no CRTP.

Anyway, it ws just a game to write the equivalent.