[gtkmm] Glib::ustring::raw() -- clarification

[Daniel Elstner <daniel elstner gmx net>]

Hi,

the whole purpose of raw() is to provide an explicit way of conversion
to std::string.  Thus,

    Glib::ustring ustr;
    std::string str = ustr;

is almost the same as

    Glib::ustring ustr;
    std::string str = ustr.raw();

raw() is sometimes useful to (a) resolve overloading ambiguities, (b) to
clarify code and (c) when performance matters (unlike operator
std::string(), raw() returns a const reference to the ustring's internal
data).

Cheers,
--Daniel