[Win32-dev] info on pointer to member function...

[Bret McMillan]

>   The best way I found to do it would be to basically have a static
function
> that would take as a parameter the object, which would then be stored as
one of
> the parameters to pass the callback.  When the callback is then recieved,
one
> would simply have the funciton call the given member function of the
object
> passed.

Here's something from good ol' Bjarne:

Consider the following class:

class Std_interface {
public:
...
  virtual void suspend() = 0;
...
  virtual ~Std_interface() {}
};

To invoke suspend() without calling it directly, consider this example:

typedef void (Std_interface:: * Pstd_mem) ();   // pointer to member type...
/*
Note that this is for a void function that takes no parameters.  For one w/
parameters, I'm pretty sure you just put them in the ()'s at the end...
*/

void f(Std_interface* p)
{
    Pstd_mem s = &Std_interface::suspend;

    // direct call...
    p->suspend();

    // call through pointer to member...
    (p->*s)();
}


God I love C++.  <g>

Bret