[FrozenVoid]

>This is not valid C++14 however, so it doesn't compile.

It is "valid C++" IF there are fewer arguments, like 6-10

The example illustrates C++ internal representation of "variadic functions".

[adsofhoads]

I was referring to the use of generic functions (ie. with an argument with type-specifier auto) which is not C++14. Your copy of g++ may accept it as an extension.