Thread: std::swap( _Tp&, _Tp& ) calling copy constructor

I'm still getting the privacy issues even after implementing the member swap to swap around members:

Code:

void Foo::m_swap( Foo& f ){
  int temp_value = this->m_value;
  this->m_value = f.m_value;
  f.m_value = temp_value;
}

What am I doing wrong that I still get the "blah is private within this context" error?

EDIT: the error is still citing "Foo::Foo( const Foo& )" as the issue? I thought I was avoiding copying now? I'm lost.