Hi Gonzalo,
Thanks for your length reply; to re-explain:
On Wed, 2002-06-26 at 21:45, Gonzalo Paniagua Javier wrote:
> void OnSizeAllocate (EventArgs e)
this is a sucky way to program; while C is type unsafe, it's easier
than this, we don't have to manually de-marshal arguments from some
generic array of arguments.
It seems in C# you have to encode the function type from) in 3 places
before you can generically invoke an arbitrary method [ crazy to have
generic Delegate invocation, but no generic Delegate construction ]
So; you have to ( either admit defeat with the above, uber-broken -
write a de-marshaller in every method scheme ) or:
a) declare your method - with signature:
void myAllocateHandler (Widget w,
Allocation a,
Object closure)
{ ... }
b) declare a Delegate type somewhere [ ok - so this can be
done only once in a header somewhere ]
delegate FooWidgetAllocationObject
(Widget w,Allocation a,Object o);
c) re-type the method signature [ in some mangled form ] in the
name of the delegate on connection:
object.connect (new FooWidgetAllocationObject
(myAllocateHandler));
Ok - so notably, while you have to do more to setup your signal in C [
equivilant to step b ], for step C (yes it is type unsafe) you just do
g_signal_connect (myAllocateHandler) effectively.
So it seems we need a generic way of creating delegates - I was hoping
to hear the language provided some way to do this - there should be, it
seems trivial to get right.
Regards,
Michael.
--
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