355             struct message_key {  struct
356                 typedef CharType char_type;
357                 typedef std::basic_string<char_type> string_type;
360                 message_key(string_type const &c = string_type()) :  in message_key()  function
373                 message_key(char_type const *c,char_type const *k) :  in message_key()  function
382                 bool operator < (message_key const &other) const  in operator <()
389                 bool operator==(message_key const &other) const  in operator ==()
394                 bool operator!=(message_key const &other) const  in operator !=()
398                 char_type const *context() const  in context()
404                 char_type const *key() const  in key()
411                 static int compare(char_type const *l,char_type const *r)  in compare()
425                 string_type context_;
426                 string_type key_;
427                 char_type const *c_context_;
428                 char_type const *c_key_;