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#include <iostream>
using namespace std;
struct Mov
{
Mov() = default;
Mov(Mov const &)
{
cout << " Copy cons\n\n";
}
Mov(Mov &&)
{
cout << " Move cons\n\n";
}
void operator=(Mov const &)
{
cout << " Copy =\n\n";
}
void operator=(Mov &&)
{
cout << " Move =\n\n";
}
};
class Defaults
{
Mov d_mov;
public:
Defaults() = default;
Defaults(int x);
// Defaults(Defaults const &) { cout << " copy cons\n\n"; }
Defaults(Defaults &&) { cout << " move cons\n\n"; }
void operator=(int);
void operator=(Defaults &&tmp) { cout << " move op=\n\n"; }
// void operator=(Defaults const &tmp) { cout << " copy op=\n\n"; }
};
int main()
{ // Mov operation: resulting d_x:
// --------------------------------
Defaults one; // ERROR: not available
// Defaults one(1);
//cout << "1 copy cons:\n";
// Defaults two(one); // Mov(Mov const &), one.d_x
cout << "2 move cons\n";
Defaults &&tmp = Defaults{};
Defaults three{ move(tmp) }; // (RVO) ERROR: not available
//
//cout << "3 copy assign:\n";
// one = two; // ERROR: not available
cout << "4 move assign:\n";
one = move(tmp); // Mov::operator=( tmp.d_x
// Mov &&tmp)
}
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