In Java 8, functional style and efficiency I have shown how bad Haskell performs at the silly task I was using as test.
But there's a detail which makes the test unfair: the problem with the given code is that the factorial function I've written isn't tail recursive.
Java 8, released in 2014, introduced lambdas and the possibility to write code in a functional style through streams of elements. C++11 standard was published in 2011, and it introduced lambdas too, which altogether with old and new functions in algorithm (e.g. accumulate(), for_each(), count(), transform()) allow for a functional style in C++.
So, in C++ there's this (perfect) forwarding thing, because there's a forwarding problem.
