understanding move semantics

move.cpp

#include <iostream>
#include <cstring>

class Foo
{
public:
  Foo(): a(new char[10])
  {
      std::cout << "Contructor\n";
  }
  Foo(const char* v): a(new char[10])
  {
      std::cout << "Non-trivial Contructor\n";
      std::strncpy(a, v, 10);
  }
  Foo(Foo&& rvalue) : a(rvalue.a)
  {
      std::cout << "Move Contructor\n";
      // a = rvalue.a;
      rvalue.a = nullptr;
  }
  Foo& operator=(Foo&& rvalue)
  {
      std::cout << "Move Assignment\n";
      {
          std::cout << "Deleting a in MAO\n";
          delete a;
      }
      a = rvalue.a;
      rvalue.a = nullptr;
      return *this;
  }
  Foo(const Foo& other): a(new char[10]) {
      std::cout << "Copy Contructor\n";
      for (int i=0; i < 10; ++i) {
          a[i] = other.a[i];
      }
  }
  Foo operator=(const Foo& other) {
      std::cout << "Copy Assignment\n";
      a = new char[10];
      std::cout << "Copy Contructor\n";
      for (int i=0; i < 10; ++i) {
          a[i] = other.a[i];
      }
      return *this;
  }
  ~Foo()
  {
    if (a != nullptr) {
        std::cout << "deleting a\n";
        delete a;
    } else {
        std::cout << "a is nullptr\n";
    }
    std::cout << "foo deconstructed" << std::endl;
  }
  void speak()
  {
    std::cout << "i'm foo" << std::endl;
  }
  char * a;
};

int main()
{
  std::cout << "1" << std::endl;
  Foo foo(std::forward<Foo&&>(Foo("dev")));  // done to avoid copy elision
  std::cout << "2" << std::endl;
  foo.speak();
  std::cout << "5" << std::endl;
  return 0;
}