Method root_path

include/boost/filesystem/path.hpp:974–974

    //  -----  decomposition  -----

    path root_path() const { return path(m_pathname.c_str(), m_pathname.c_str() + detail::path_algorithms::find_root_path_size(*this)); }
    // returns 0 or 1 element path even on POSIX, root_name() is non-empty() for network paths
    path root_name() const { return path(m_pathname.c_str(), m_pathname.c_str() + detail::path_algorithms::find_root_name_size(*this)); }