Initializing a std::map iterator class member

I'm trying to do this: ``` typedef std::map<std::string, time_t> my_map; const mymap& some_function(); class bla { private: my_map::iterator current bla(const mymap& m) : current(m.begin()) { } } ``` And it's not working. The somewhat more convoluted real error message is: error: no matching function for call to 'std::_Rb_tree_iterator, long int> >::_Rb_tree_iterator(std::map, long int>::const_iterator)' I tried moving the initialization/assignment to the constructor body: ``` { current = m.begin(); } ``` Which didn't work either. So I thought, the type of `current` is wrong, so I just let the compiler deduce that: ``` ... decltype(my_map::begin()) current; ... ``` Which doesn't work either. All I need is an iterator member that is set at `bla` construction time, so I don't have to explicitly set it in some stupid extra function and can iterate over the map externally through: ``` bool bla::do_stuff(...output...) { if(current = m.end()) return false; balblabla(current); ++current; return true; } ```