ownership_transfering.cpp

// Type your code here, or load an example.
#include <algorithm>
#include <string>
#include <iostream>
#include <memory>
#include <utility>

using namespace std;

void increment(unique_ptr<int>&& p)
{
    *p += 1;
    cout << "integer is now " << *p << endl;
    cout << "done" << endl;  
}

void consume(unique_ptr<int> p)
{
    *p += 4;
    cout << "integer is now " << *p << endl;
    cout << "done" << endl;  
}

int main()
{
    auto a = make_unique<int>(2);
    increment(move(a));
    cout << (a != nullptr ? "valid " : "moved") << endl;
    consume(move(a));
    cout << (a != nullptr ? "valid " : "moved") << endl;
    cout << "before exit" << endl;
}