-int Alert::prompt(string const & title, string const & question,
- int default_button, int escape_button,
- string const & b1, string const & b2, string const & b3)
+namespace lyx {
+
+namespace frontend {
+
+int Alert::prompt(docstring const & title, docstring const & question,
+ int default_button, int escape_button,
+ docstring const & b1, docstring const & b2, docstring const & b3)