C++ print template container error (error: ambiguous overload for 'operator<<') understanding?

Question

I want to write template function which can print container like std::vector, std::list.

Below is my function, just overload <<.

Answer 1

The problem is that the templated type Container can match any type, not just containers. That includes the " " you are trying to print.

If you look at the error message from a different compiler: https://godbolt.org/g/3YKtca

:5:15: note: candidate function [with Container = char [2]]

std::ostream& operator<<(std::ostream& out, const Container& c){

Perhaps you want a partial specialization of vector to only take vectors. Determining if a type is a container is a more complicated problem.

#include 
#include 

template
std::ostream& operator<<(std::ostream& out, const std::vector& c){
    for(auto item:c){
        out< iVec{5, 9, 1, 4, 6};
    std::cout<

https://godbolt.org/g/NJNwmN