#include<assert.h>
#include<string>
#include<iostream>
#include<vector>


template<typename T> void swap(T& first, T& second){
    //with concepts we could specialize one version of the function to perform the XOR
    //based swap if the type has the operator

    T const temp = first;
    first = second;
    second = temp;
}

int main(){
    int i = 0;
    int j = 1;
    swap(i, j);
    assert(i==1 && j==0 && "Doesnt work for ints!");

    std::string s1 = "Hello";
    std::string s2 = "World";
    swap(s1, s2);
    assert(s2=="Hello" && s1 == "World" && "Doesnt work for strings!");
    std::cout << "It Works!\n";

    //Better, more idiomatic way...
    std::vector<int> v1 = {1,2,3,4};
    std::vector<int> v2 = {4,3,2,1};
    std::swap(v1, v2);

    std::cout << "using std::swap \nv1\n";
    for(auto const &e : v1){
        std::cout << e << " ";
    }

    std::cout << "\nv2\n";
    for(auto const &e : v2){
        std::cout << e << " ";
    }

    return 0;
}