Question

I am getting following error.

typedef std::vector<std::pair<std::string, void*> >  PropInfoType;
#define REGISTER_FUNCTOR(type, func) \
  template <typename OWNER> \
  struct writeCharFunctor { \
    void operator(PropInfoType::iterator& it)() { \
    } \
  };

  REGISTER_FUNCTOR(char,writeChar);

MSDN just saying that this is due to macro expansion

If I change void operator(PropInfoType::iterator& it)() to void operator()() it works

Answer 1

It probably should contain

 void operator () (PropInfoType::iterator& it) { \

because the operator keyword should be followed by the operator itself.