[Boost-users] General C++: Class Method Signatures Miss-Match

Hello list, I know this is not boost related, but I will appreciate it if anyone could shed some light on what is happening here? Compiler error: xml.cpp: In member function ‘xml::document& xml::document::parse(std::vector&)’: xml.cpp:25: error: no matching function for call to ‘xml::document::characters(std::basic_string)’ xml.hpp:24: note: candidates are: virtual void xml::document::characters(unicode::string) unicode::string definition starts: namespace unicode { typedef std::size_t code_point; class string : public std::basic_string { Is "std::basic_string" not the same as "unicode::string"? If not why is it not? Etienne