+extern
+template basic_format<char>;
+
+extern template
+std::ostream &
+operator<< <char, std::char_traits<char> >(std::ostream &,
+ boost::basic_format<char> const &);
+
+namespace io
+{
+
+extern template
+std::string
+str<char, std::char_traits<char> >(boost::basic_format<char> const &);
+
+namespace detail
+{
+
+extern template
+bool parse_printf_directive<char, std::char_traits<char> >
+(std::string const &, std::string::size_type*,
+ format_item<char, std::char_traits<char> >*,
+ std::ios &, unsigned char);
+
+extern template
+void distribute<char, std::char_traits<char>, std::string const &>
+(boost::basic_format<char>&, std::string const &);
+
+extern template
+boost::basic_format<char> &
+feed<char, std::char_traits<char>,
+ std::string const &>(boost::basic_format<char> &,
+ std::string const &);
+
+} // namespace detail
+
+} // namespace io