2018-05-07 12:25 GMT+02:00 Alidra Abdelghani via Pharo-users < pharo-users@lists.pharo.org>:

---------- Přeposlaná zpráva ---------- From: Alidra Abdelghani <alidrandco@yahoo.fr> To: pharo-users@lists.pharo.org Cc: Bcc: Date: Mon, 7 May 2018 11:25:49 +0100 Subject: Package extension. Adding instance variables to classes Hi,

I am working on a package named ClassNamesAnalyzer and I need to add code to third party classes in other packages (for instance the FAMIX-Core package). “Extending” third party classes with methods is easy; I just need to categorise my methods under the *ClassNamesAnalyzer protocole so that loading my package will load them in the image. However, if I want to add instance variables to theses classes, they are not there when I load the package in a new image.

*So my question is* : is there a way to include instance variables addition to other packages in my package?

Currently not, you should use privateState

*Another question is* : is it good practice to add instance variables to classes in third party packages and is there a way to avoid it (because I am not very confortable with that idea)?

It is not, see FAMIXContainerEntity>>#definedAnnotationTypes how this issue is currently being solved using the privateState. Cheers, -- Pavel

Thanks in advance, Abdelghani