Template recursion error on table struct

[data pulverizer via Digitalmars-d-learn]

p.s. I realise that the ColumnTable call is a little ponderous 
but I tidy it up in a convenience wrapper function:

auto CreateDataTable(Args...)(){
	string[] names;
	foreach(i, arg; Args){
		names ~= Args[i].stringof;
	}
	auto df = ColumnTable!(Args)(Args);
	df.setNames(names);
	return df;
}


// auto myTable = CreateDataTable!(names, salary, age)();