[boost] bind/lambda - unsupported use case?

From: Aleksey Gurtovoy (agurtovoy_at_[hidden])
Date: 2003-08-08 06:26:44

Consider the following snippet:

    void show_warning( message_dialog const&, user_message );
    void post_command( boost::function<void()> );

    int main()
    {
        boost::function<void( user_message )> f( 
              bind( &post_command
                , ????( bind( &show_warning, message_dialog(), _1 ) )
    //            ^^^^ what goes here?
                )
            );
    }

Could we make it work, somehow? Offers of a hand-written function 
performing the composition are not accepted :).

Aleksey