Hash-Table-Based Multiple Arguments Replacement

[Nordlöw via Digitalmars-d-learn]

On Sunday, 11 October 2015 at 00:16:44 UTC, Meta wrote:
> There was something like this proposed quite awhile ago (can't 
> remember what it was, might've been extending unary/binaryFun 
> to accept an AA), but it was rejected.

With static foreach in a switch we can do better. I'll put 
together a solution.