#include<iostream>
#include<string>
using namespace std;

template<typename T>
struct Node{
    T data;
    Node* left;
    Node* right;

    Node(T x) : data(x), left(NULL), right(NULL){}
};

template<typename T>
Node<T>* new_node(T x)
{
    Node<T>* return_node = new Node<T>(x);
    return return_node;
}

int main()
{
    Node<string>* root = new_node("hi"); //error!

    string x = "hi";
    Node<string>* root2 = new_node(x); //OK
}

new_node(std::string("hi"));

new_node<std::string>("hi");