Return enum-templated struct based on runtime value

[Tobias Pankrath]

>
> Is there however some way to generate that switch with cases 
> for each enum member in a template, so that each case calls 
> <some-passed-template-func>(Machine)() instantiated with the 
> appropriate enum member? I know you could do it with string 
> mixins, but that be a hassle to implement...
>
> Eventually, I want my code to look like
>
>     void func(Machine machine)() { ... }
>     switchOnEachEnumMember!func(machine);

http://dpaste.dzfl.pl/ce8366a7

The foreach is unrolled at compile time.