Function template for mapping values with a given functor

for_each_template.cpp

#include <iostream>
#include <functional>
#include <vector>

template<typename Container, typename Function>
void f(Container&& c, Function&& f)
{
    for (const auto& e : c) {
        f(e);
    }
}

auto l = [](auto&& v){std::cout << v << std::endl;};

struct m
{
    template<typename T>
    void operator()(T&& a)
    {
        std::cout << a << std::endl;
    }
};

template<typename T>
void n(T a)
{
    std::cout << a << std::endl;
}

int main()
{
    std::vector<int> v{1,2,3,4,5};
    f(v, &n<int>);
    f(v, l);
    f(v, m());
}