[boost] filesystem utf-8 support?

Hi! I wonder if boost::filesystem has support for utf-8. especially for windows this means that all path names have to be converted from utf-16 to utf-8 and back internally by boost::filesystem. for unix-like systems this may not be necessary as the locale can be set to utf-8 but auto-conversion for non-utf-8 locales would still be good. -Jochen