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

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"?

No.

If not why is it not?

Because unicode::string is a descendant of std::basic_string, so these are 2 distinct types. If you want just to alias an existing type, use "typedef" instead of inheritance.