On Thu, Jul 27, 2006 at 09:39:08AM +0200, David Nečas (Yeti) wrote:
>
> Each class has its own class struct which contains all
> ancestors's class structs
To clarify: The object system keeps an instance of both
MamanBarClass and MamanBarSubClass. So the class structs
contains all ancestors' class structs, but the
MamanBarSubClass it gets in class_init() it its own. When
it changes do_action()
MamanBarClass mbclass = MAMAN_BAR_CLASS(klass);
mbclass->do_action = maman_bar_sub_do_action;
it changes its own copy.
If the method does something in MamanBar itself it sets
do_action similarly
klass->do_action = maman_bar_do_action_real;
where maman_bar_do_action_real() is the real implementation
of do_action() for MamanBarClass. The purpose of
maman_bar_do_action() is to invoke do_action() of the right
class. It can contain some code too, but this code is not
overridable.
Yeti
--
Anonyms eat their boogers.
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