C++ Usage of copy/move constructors on argument passing

test.cpp

#include <iostream>
#include <vector>

using namespace std;

class my
{
public:
  my()
  {
    cout << "ctor" << endl;
  }
  my(int x)
  {
  }
  my(const my&)
  {
    cout << "copy ctor" << endl;
  }
  my(my&&)
  {
    cout << "move ctor" << endl;
  }

  void nonconst()
  {}
};

my r()
{
  my r;
  return r;
}

class our
{
        public:   our(my m):
     m(move(m)){}
   my m;
};

class your
{
        public:
                your(const my& m):
                        m(m){}
                my m;
};

class best
{
        public:
                template<typename T>
                best(T&& m):
                m(forward<T>(m)){}
                my m;
};

template<typename T>
void log(T&& s)
{
        cout << s << endl;
}

int main()
{
//my m;
  // const vector<my> v { 1, 2 };
   log("my m;");
   my m;
   log("our y(m);");
   our y(m);
   log("our z(r());");
   our z(r());
   log("");
   log("your y(m);");
   your yy(m);
   log("your zy(r());");
   your zy(r());
   log("");
   log("best b(m);");
   best b(m);
   log("best b2(r());");
   best b2(r());
}