- String str = to_string (_f ("Grob `%s' has no interface for property `%s'",
- me->name ().to_str0 (),
- ly_symbol2string (sym).to_str0 ()));
+ string str = to_string (_f ("Grob `%s' has no interface for property `%s'",
+ me->name ().c_str (),
+ ly_symbol2string (sym).c_str ()));