On 27.08.2011 00:31, Jonas Maebe wrote:
On 27 Aug 2011, at 00:16, Sven Barth wrote:
There is a class AVView, a class AVViewGroup and an interface AVViewManager.
AVViewGroup extends AVView and implements AVViewGroup. Also it defines a nested
class InnerLayoutParam.
So far all is ok, but now the problematic part:
AVView and AViewManager both contain a parameter and/or result value of type
AVViewGroup.InnerLayoutParam.
Is there a way to solve this quite nasty circle?
Not in a clean way. The only way you can do it is by removing
AVViewGroup.InnerLayoutParam from the AVViewGroup class and declare it as an
empty class up front (empty because I don't think it will be handled correctly
if you add methods etc to it and try to call those later):
AVViewGroup_InnerLayoutParam = class external
'Android.V_add_rest_of_package_name' name 'ViewGroup$Layoutparam'
(parentclass,parentintf1,parentintf2, ...)
end;
And then replace all references to AVViewGroup.InnerLayoutParam with references
to AVViewGroup_InnerLayoutParam.
Ok, thank you. I'll play around with that
It's a limitation of the Pascal language compared to Java (no way to refer to inner
classes before the parent class has been defined), and even if we would choose to lift it
somehow (e.g. by allowing something like "AVViewGroup.InnerLayoutParam =
class;" as a top level declaration) I'm not immediately sure how we to implement
that efficiently in the compiler.
Well... as long as the "workaround" will work I'm rather happy :)
Regards,
Sven
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