select different print for containers and non-containers

select_print.cpp

//compile with g++ -std=c++11 select_print.cpp

#include <vector>
#include <iostream>
#include <string>

namespace detail {

    struct FromAny {
        template <class T> FromAny(const T&) {}
    };


    struct Printer1 {
        template <class T> void PrintImpl(const T& x) {
            std::cout << x << '\n';
        }
    };

    struct Printer2 {
        template <class T> void PrintImpl(const T& x) {
            for (auto &y: x)
                std::cout << y << "; ";
            std::cout << '\n';
        }

    };


    Printer1 SelectPrinter(FromAny) { return Printer1(); }

    template <class T>
        Printer2 SelectPrinter(const T &x, typename T::iterator *_not_used = (sizeof(T().begin()), nullptr) )  {
            return Printer2();
        }
}

template <class T> void Print(const T&x) {
    detail::SelectPrinter(x).PrintImpl(x);
}


int main() {
    std::vector<int> v = {0, 1, 2};

    int i = 33;

    Print(i);
    Print(v);
    Print("hello");
    Print(std::string("hello"));
}