[fltk.general] Re: Fl_Sys_Menu's add method throws errors. - Forums

> Hey there. In one of the examples, I changed Fl_Menu to Fl_Sys_Menu to have it work with OS X. Result:

>
> *** Compile menubar-add.cxx...
> menubar-add.cxx:59:29: error: cannot initialize a parameter of type 'int' with an lvalue of type 'const char [3]'
> menu->add("&File/&Open", "^o", MyMenuCallback);
> ^~~~

Might want to open an STR for this.

Seems Fl_Sys_Menu_Bar.H is not giving access to Fl_Menu_'s version of add()
that accepts a const char* as the second parameter, basically an overload.

Might be some weird compiler phase issue; quoting the possibly relevant comment #3 from:
http://www.gamedev.net/topic/478757-c-inline-and-inheritance/

"""
    The reason the name is hidden is because name lookup terminates as soon as
    a suitable name is found, and overload resolution is done in a separate phase.
    The using directive pulls the other overloads from the base into the derived class
    namespace, so that they will be found in phase one.
"""

I tried a variation of the recommendation suggested in that comment, and it seemed
to solve the issue.. might be the 'right' solution, not sure:

Index: FL/Fl_Sys_Menu_Bar.H
===================================================================
--- FL/Fl_Sys_Menu_Bar.H    (revision 10054)
+++ FL/Fl_Sys_Menu_Bar.H    (working copy)
@@ -45,6 +45,7 @@
   const Fl_Menu_Item *menu() const {return Fl_Menu_::menu();}
   void menu(const Fl_Menu_Item *m);
   int add(const char* label, int shortcut, Fl_Callback*, void *user_data=0, int flags=0);
+ using Fl_Menu_::add;
   int insert(int index, const char* label, int shortcut, Fl_Callback *cb, void *user_data=0, int flags=0);
   void remove(int n);
   void replace(int rank, const char *name);