Idea: limited template expansion

[Sebastiaan Koppe via Digitalmars-d]

On Wednesday, 20 January 2016 at 21:44:06 UTC, David Nadlinger 
wrote:
> Can't you just write a wrapper function that takes the template 
> function as a compile-time argument and generates the switch 
> for you by iterating over the std.traits.EnumMembers of said 
> compile-time parameter?
>
> Something like `enumTemplateDispatch!foo(detectBOM(buffer), 
> <runtime args>))`.

I have used EnumMembers a few times and it definitely saved me 
the hassle of writing the switch myself.

However, in this case, isn't there a mapping between enums and 
types that one still needs to specify? That is: ( UTF8=>char[], 
UTF16=>wchar[], UTF32=>dchar[] ).