9/20    How do I pass a pointer to a member function in C++?
        \_ void Apply( Class* obj, (Class::*pmf)(void) ) { obj->*pmf(); }

        \_ Ilyas answers the question "How do I pass a PMF to a function
           that expects a pointer to a non-member function?", which is not
           what you asked.   --pld
           void Apply(Class* obj, (Class::*pmf)(void)) { obj->*pmf(); }
           Apply(instance, &instance::SomeMemberFunction);
        \_ You can't because a member function is not quite a function in a
           sense you are used to.  You see, all member functions implicitly
           assume a 'zeroth' argument, which is always the object on which
           this member function is invoked.  In general, you do not know the
           identity of this object at compile time, and even if you did, there
           is really no syntax in C++ to allow you to specify this information
           in the function pointer type.  What you want is to create a wrapper
           function, which calls the member function on an appropriate object.
           Then you can pass the pointer to the wrapper function to your
           mergesort routine.  It's worth noting that object oriented languages
           with closures and curried functions, like ocaml, avoid this
           problem altogether.  -- ilyas
           \_ I like my functions curried, Indian style.
    \_ If intCompare is static, then try &MyClass::intCompare.  If it's not,
       you can use member function adaptor in stl <functional>.
       \_ I stand corrected, static member functions (obviously) don't need
          the pointer to the object as an argument.  -- ilyas.
       \_ Speaking of which, any rec's on a good online beginner's guide to stl
          and/or a book?
          \_ it's such an unwieldy, ugly, large mess full of little caveats.
             i think it's time for C++ to die.
             \_ lovely.  really.  when microsoft dies because of that same
                thing, i'll be worried about c++.  If you're on campus net
                you can get to the C++ lang spec.
          \_ I liked Meyers' "Effective STL".  The docs on
             http://www.sgi.com/tech/stl are good for reference.
    \_ Ah.  C derived languages.
       Widget w;
       char *c;
       w.function(c);
       \_ what the fuck? are you clueless? what are you talking about?
          \_ 'c' is a pointer being passed to a member function.  The OP needs
             to clarify.
          \_ a) How do I pass a (pointer to a member function) in C++?
             b) How do I pass (a pointer) to (a member function) in C++?
             I think the original question was (a), not (b).
             \_ Maybe that's why most books refer to them as "function pointer"
                and "member function pointer".