How to hash and compare a pointer-to-member-function?

Question

How can i hash (std::tr1::hash or boost::hash) a c++ pointer-to-member-function?

Example:

I have several bool (Class::*functionPointer)() (not static) that

Answer 1

I could not cast the pointer (in Microsoft compiler 2010)as described in previous answer but this works for me:

static string fmptostr(int atype::*opt)
  {
      char buf[sizeof(opt)];
      memcpy(&buf,&opt,sizeof(opt));
      return string(buf,sizeof(opt));
  }

About bitwise identity of the pointer, it can be bitwise so it seems if appropriate compiler switches are used. At least this is true for Microsoft compiler E.g using #pragma pointers_to_members and a switch.../vmg