ex12_16.cpp

//
//  ex12_15.cpp
//  Exercise 12.15
//
//  Created by pezy on 12/22/14.
//  Copyright (c) 2014 pezy. All rights reserved.
//
//  Compilers don’t always give easy-to-understand error messages if we attempt to
//  copy or assign a unique_ptr. Write a program that contains these errors to see
//  how your compiler diagnoses them.

#include <iostream>
#include <string>
#include <memory>

using std::string; using std::unique_ptr;

int main()
{
    unique_ptr<string> p1(new string("pezy"));
    // unique_ptr<string> p2(p1); // copy
    //                      ^
    // Error: Call to implicitly-deleted copy constructor of 'unique_ptr<string>'
    //
    // unique_ptr<string> p3 = p1; // assign
    //                      ^
    // Error: Call to implicitly-deleted copy constructor of 'unique_ptr<string>'
    std::cout << *p1 << std::endl;
    p1.reset(nullptr);
}