02-move.cpp
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#include <memory>
#include <iostream>
class Example
{
public:
int* val;
Example(Example&& rhs) : val(rhs.val)
{
rhs.val = nullptr;
std::cout << "Example::Example(Example &&)" << std::endl;
}
Example& operator=(Example&& rhs) // buggy
{
val = rhs.val;
rhs.val = nullptr;
std::cout << "Example::operator=(Example &&)" << std::endl;
return *this;
}
Example() : val(new int(0))
{
std::cout << "Example::Example()" << std::endl;
}
Example(int a): val(new int(a))
{
std::cout << "Example::Example(" << a << ")" << std::endl;
}
~Example()
{
delete val;
std::cout << "Example::~Example()" << std::endl;
}
};
int main()
{
Example a(3);
Example b = std::move(a);
Example c(Example(4));
Example d;
d = std::move(b);
}