The expression of an out parameter must be an LHS (left hand side) assigment.
You can try *(condition?&inh:(inh_type*)NULL) You'll have to fill inh_type with thr right type Sam -----Original Message----- From: Jan Hudec <[email protected]> Sent: 09 April 2009 20:10 To: [email protected] Subject: [Vala] Optional output parameters? Hello Folks, I want to use the Glib.Process.spawn_async_with_pipes (g_spawn_async_with_pipes) function. It has three output parameters through which is passes back pipes it connected to the newly created process' stdin, stdout and stderr respectively. The underlying function will not create the pipes if the respective pointer is NULL. Now that would be OK, if whether it will need the handler or not didn't depend on an argument of the calling function. I want to construct a conditional expression (to avoid having four calls to the spawn_async_with_pipes), that will pass either pointer to the variable or NULL, but I am out of guesses. I tried various things like: condition ? out inh : null out condition ? inh : null out (condition ? inh : null) ??? and always got either "incompatible expressions" or "syntax error" errors. Thanks, Jan _______________________________________________ Vala-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/vala-list _______________________________________________ Vala-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/vala-list
