struct __lt_str_case_insensitive {
    // compare case insensitive
    bool operator()(const char* s1, const char* s2) const {
        return strcasecmp(s1, s2) < 0;
    }
};

// a std::map which uses char strings as case insensitive key(s)
// and an arbitrary value typ
template<T>
typedef std::map<const char*, T> stringimap;