#include <iostream>
#include <string>
#include <vector>
#include "Message.h"

int Message::instance = 0;

void printv(Message   msg) { cout << "Function printv: " << msg << endl; }
void printr(Message&  msg) { cout << "Function printr: " << msg << endl; }
void printm(Message&& msg) { cout << "Function printm: " << msg << endl; }

int main()
{
    cout << "Default constructor:" << endl;
    Message msg;
    cout << "msg = " << msg << endl;

    cout << endl << "Regular constructor:" << endl;
    Message hello1("hello");
    Message world1("world");
    cout << "hello1 = " << hello1 << endl;
    cout << "world1 = " << world1 << endl;

    cout << endl << "Copy constructor:" << endl;
    Message hello2(hello1);
    cout << "hello1 = " << hello1 << endl;
    cout << "hello2 = " << hello2 << endl;

    cout << endl << "Move constructor:" << endl;
    Message hello3(move(hello1));  // make hello1 an rvalue
    cout << "hello1 = " << hello1 << endl;
    cout << "hello3 = " << hello3 << endl;

    cout << endl << "Copy assignment operator:" << endl;
    Message world2;
    world2 = world1;
    cout << "world1 = " << world1 << endl;
    cout << "world2 = " << world2 << endl;

    cout << endl << "Move assignment operator #1:" << endl;
    Message helloworld1;
    helloworld1 = hello2 + world2;  // the expression is an rvalue
    cout << "helloworld1 = " << helloworld1 << endl;
    cout << "     hello2 = " << hello2 << endl;
    cout << "     world2 = " << world2 << endl;

    cout << endl << "Move assignment operator #2:" << endl;
    Message helloworld2;
    helloworld2 = add(hello2, world2);  // the return value is an rvalue
    cout << "helloworld2 = " << helloworld2 << endl;
    cout << "     hello2 = " << hello2 << endl;
    cout << "     world2 = " << world2 << endl;

    cout << endl << "Move assignment operator #3:" << endl;
    Message world3;
    world3 = move(world1);  // make world1 an rvalue
    cout << "world1 = " << world1 << endl;
    cout << "world3 = " << world3 << endl;

    cout << endl << "Moved return rvalue #1:" << endl;
    Message hi("Hi");
    Message mom("Mom");
    Message himom(hi + mom);  // the return rvalue is moved
    cout << "himom = " << himom  << endl;

    cout << endl << "Moved return rvalue #2:" << endl;
    Message go("Go");
    Message spartans("Spartans");
    Message gospartans(add(go, spartans));  // the return rvalue is moved
    cout << "gospartans = " << gospartans  << endl;

    cout << endl << "Append an lvalue to a vector:" << endl;
    vector<Message> v;
    v.reserve(2);
    v.push_back(gospartans);
    cout << "v[0] = " << v[0] << endl;

    cout << endl << "Append an rvalue to a vector:" << endl;
    v.push_back(go + spartans);
    cout << "v[1] = " << v[1] << endl;

    cout << endl << "Print by value #1:" << endl;
    printv(hello2);

    cout << endl << "Print by value #2:" << endl;
    printv(hello2 + world2);

    cout << endl << "Print by reference:" << endl;
    printr(hello2);

    cout << endl << "Print by move #1:" << endl;
    printm(hello2 + world2);

    cout << endl << "Print by move #2:" << endl;
    printm(move(hello2));
    printr(hello2);

    cout << endl << "Program terminating." << endl;
    return 0;
}