-namespace std {
-
-template<typename Char> struct char_traits;
-template<> struct char_traits<char>;
-template<> struct char_traits<wchar_t>;
-
-template<typename Alloc> class allocator;
-
-template<typename Char, typename Traits, typename Alloc> class basic_string;
-
-typedef basic_string<char, char_traits<char>, allocator<char> > string;
-
-}
-
-