On 07 May 2018, at 13:15, pharo-users-request@lists.pharo.org wrote:

Message: 1
Date: Mon, 7 May 2018 13:43:56 +0200
From: Pavel Krivanek <pavel.krivanek@gmail.com>
To: Any question about pharo is welcome <pharo-users@lists.pharo.org>
Subject: Re: [Pharo-users] Package extension. Adding instance
variables to classes
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<CAHN2FzeMiBL4Y8asJ0XCjS2AQdxycoN+pbc+Hsd=trMnmuiJqw@mail.gmail.com>
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2018-05-07 12:25 GMT+02:00 Alidra Abdelghani via Pharo-users <
pharo-users@lists.pharo.org>:

---------- P?eposlan? zpr?va ----------
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