ex13_53.cpp

#include "ex13_53.h"
#include <iostream>

inline void swap(HasPtr& lhs, HasPtr& rhs)
{
    using std::swap;
    swap(lhs.ps, rhs.ps);
    swap(lhs.i, rhs.i);
    std::cout << "call swap" << std::endl;
}

HasPtr::HasPtr(const std::string& s) : ps(new std::string(s)), i(0)
{
    std::cout << "call constructor" << std::endl;
}

HasPtr::HasPtr(const HasPtr& hp) : ps(new std::string(*hp.ps)), i(hp.i)
{
    std::cout << "call copy constructor" << std::endl;
}

HasPtr::HasPtr(HasPtr&& p) noexcept : ps(p.ps), i(p.i)
{
    p.ps = 0;
    std::cout << "call move constructor" << std::endl;
}

HasPtr& HasPtr::operator=(HasPtr rhs)
{
    swap(*this, rhs);
    return *this;
}

// HasPtr& HasPtr::operator=(const HasPtr &rhs)
//{
//    auto newp = new std::string(*rhs.ps);
//    delete ps;
//    ps = newp;
//    i = rhs.i;
//    std::cout << "call copy assignment" << std::endl;
//    return *this;
//}

// HasPtr& HasPtr::operator=(HasPtr &&rhs) noexcept
//{
//    if (this != &rhs)
//    {
//        delete ps;
//        ps = rhs.ps;
//        i = rhs.i;
//        rhs.ps = nullptr;
//        std::cout << "call move assignment" << std::endl;
//    }
//    return *this;
//}

HasPtr::~HasPtr()
{
    std::cout << "call destructor" << std::endl;
    delete ps;
}