Am Dienstag, 2. September 2008 16:35:47 schrieb Benoit Minisini: > > The ByRef feature was mainly added to help people porting VB project. > > It does not work by passing pointers, but by keeping the value of the > argument when the function ends, and put it into the expression passed > ByRef. > > GetData(ByRef sResult) > > does actually the following: > > GetData(sResult) ' Push sResult on the stack as first argument. > ... ' Do not free the stack after GetData ends. > sResult = ... ' Gets the value from the stack and put it into sResult. > > Note that this way, any assignment expression can be passed by reference. > > GetData(ByRef MyCollectionOfLabels["key"].Text) > > At function declaration, ByRef means that you *can* pass the argument by > reference, but that you may not. > > At function call, ByRef means that you *want* the argument to be passe by > reference. > > As Gambas linking is entirely dynamic, the interpreter checks at runtime > that you use ByRef if the function really allows it. This is the reason why > ByRef must be specified noth at function declaration and at function call. > > Moreover, you can see that ByRef makes the function call slower because of > the needed checks and the recall of the value from the stack.
Message understood!!! :-))) Thank you very much! Greetz Stevie ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
