How to use a function of own class in for_each method?

Question

Assume I have this class (inherited from std::Vector, it\'s just an example)

#include 

using namespace std;

template 
class C          


        

Answer 1

For starters, don't inherit from the standard containers, they are not designed to be inherited (no virtual destructors etc.).

Secondly, and regarding your problem, it's because a pointer to a member function is not the same as a pointer to a function. The reason is that member function has a hidden first parameter which becomes the this pointer in the function. The simplest way to solve it is to make the function static.

Another solution is to use the std::bind function that came with C++11:

for_each(this->begin(), this->end(),
    std::bind(&C::transformation, this, std::placeholders::_1));

If you don't have C++11 (even though you tagged your question as such), then you probably could get something working with std::mem_fun or std::bind1st.