[C++14] So I had some fun with templates and averages...

[A-Man]

At first, I didn't really know what half of the code was doing (rarely did I even get past C++98, let alone 14), so I had to do my reading before I comment.

The idea of having functions be as flexible as that is rather brilliant, and I can see myself adopting it :P.
The compiler did throw 2 errors though (about not able to figure out the return types for "auto" of the average and size functions). Using "-> decltype(returntype)" after each function's declaration fixed the problem.

CPP-Code: template <typename Cont> //requires std::Container<Cont> inline auto size(const Cont &cont) -> decltype(cont.size()) {    return cont.size(); }   template <typename Cont> //requires std::Container<Cont> auto average(const Cont &cont) -> decltype(*begin(cont)) {    auto Sum = decltype(*begin(cont))(0);//deduce the return type, ugly hack, ISO committee please...      for(auto &e:cont) Sum += e;      return Sum/size(cont); }

I can't understand what exactly did you do there for the new size() function.

(I find that hack to be kind of neat btw)