Re: Why std::string is used for the file paths?

["Roman Yazmin" <roman yazmin gmail com>]

> Gtkmm doesn't have its own "string" class. It has a special class for 
> UTF-8 encoded strings. That's what Glib::ustring is.

And  all library use this special class for UTF-8 encoded strings. And must be used for file paths also.
If not, please show me the benefits of using std::string for file paths instead of ustring.