Re: [xmlvm-dev] [xmlvm-users] error when intializing variables

[Arno P. <ar...@pu...>]

that would be a viable solution for the ObjC backend.

Arno


On 7/7/11 4:29 PM, Panayotis Katsaloulis wrote:
> What do you think about the solution for this specific problem?
>
> Use the following code for the selector applicationDidFinishLaunching of
> UIApplicationDelegate
>
>
> - (void) applicationDidFinishLaunching: (UIApplication*) app
> {
> SELselector =
> NSSelectorFromString([NSStringstringWithFormat:@"__init_%s__",
> class_getName([selfclass])]);
> [self performSelector:selector];
>
>
> [selfapplicationDidFinishLaunching___org_xmlvm_iphone_UIApplication: app];
> }
>
> As a side note, probably we should do the same for the UIApplication
> object as well (if it is an instance of org_xmlvm_iphone_UIApplication)
>
>
>
>
> On 11 Νοε 2010, at 6:56 μ.μ., Arno Puder wrote:
>
>>
>> that is a known issue. The code that XMLVM generates is correct. The
>> problem is that certain classes (such as UIAppication*) are instantiated
>> by Cocoa and Cocoa doesn't know about the __init__*() constructors that
>> were generated by XMLVM. The initialization of 'test' in your example
>> will end up in the default constructor for class Main and since Cocoa
>> doesn't call it, it won't get initialized.
>>
>> This will work perfectly fine for any other class (that is handled by
>> XMLVM). It is just this special case when Cocoa instantiates a Java
>> object. Back then I couldn't think of a solution for this. I'll revisit
>> this with the C backend. Here we might have more hooks to solve this
>> problem.
>>
>> Arno
>>
>>
>> On 11/11/10 7:08 AM, Panayotis Katsaloulis wrote:
>>> there is something missing when variables are initialized outsize the
>>> constructor.
>>>
>>> As a minium program to display this error, have a look at this:
>>> instead of printing "hello", it prints "null", since this is not
>>> initialized.
>>>
>>>
>>>
>>>
>>> package my.testmem;
>>>
>>> import org.xmlvm.iphone.UIApplication;
>>> import org.xmlvm.iphone.UIApplicationDelegate;
>>>
>>> public class Main extends UIApplicationDelegate {
>>>
>>> String test = "hello";
>>>
>>> @Override
>>> public void applicationDidFinishLaunching(UIApplication app) {
>>> System.out.println(test);
>>> }
>>>
>>> public static void main(String[] args) {
>>> UIApplication.main(args, null, Main.class);
>>> }
>>> }
>
>
>
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