Append variadic template parameters

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On Sunday, 5 February 2017 at 20:36:57 UTC, Mark Fisher wrote:
> I want to write a template:
>
> static auto ref BindArg(alias Func,alias arg,args...)() {
> 	return Func(arg,args);
> }
>
> where Func is called with 'arg' followed by the 'args' 
> parameters.
> eg:
>
> string f(string a,int b,int c);

BindArg(f,"1",2,3);

You forgot the !

>
> The compiler throws an error:
> Error: function f (string a, int b, int c) is not callable 
> using argument types ()
>
> How do I append the parameters?