Guillermo Polito wrote:

Just be careful, that privateState thing looks like a Moose only Famix feature. It't not available in plain Pharo objects :)

In ES6 mailing list, they had this problem re how to do private state for objects, and it was shown that having private state is sort of isomorphic to having WeakMap indexed by objects. So in case of Pharo, I'd say using WeakIdentitityKeyDictionary can do the trick. Without resorting to any external dependency.

Herby

On Wed, May 9, 2018 at 2:09 AM, Alidra Abdelghani via Pharo-users <pharo-users@lists.pharo.org <mailto:pharo-users@lists.pharo.org>> wrote:



�� �� ---------- Forwarded message ----------
�� �� From: Alidra Abdelghani <alidrandco@yahoo.fr
�� �� <mailto:alidrandco@yahoo.fr>>
�� �� To: Pavel Krivanek <pavel.krivanek@gmail.com
�� �� <mailto:pavel.krivanek@gmail.com>>
�� �� Cc: Any question about pharo is welcome <pharo-users@lists.pharo.org
�� �� <mailto:pharo-users@lists.pharo.org>>
�� �� Bcc:
�� �� Date: Wed, 9 May 2018 01:09:06 +0100
�� �� Subject: Re: Package extension. Adding instance variables to classes
�� �� Hi Pavel,

�� �� Thank you for your answer.
�� �� I actually didn���t know about this mechanism.
�� �� I think it is will do the job :)
�� �� �� I have probably to rewrite some parts pf my code to access my
�� �� variables through privateState.�� no?


�� �� Thanks again
�� �� Abdelghani

�� �� On 07 May 2018, at 13:15, pharo-users-request@lists.pharo.org
�� �� <mailto: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
�� �� <mailto:pavel.krivanek@gmail.com>>
�� �� To: Any question about pharo is welcome
�� �� <pharo-users@lists.pharo.org <mailto:pharo-users@lists.pharo.org>>
�� �� Subject: Re: [Pharo-users] Package extension. Adding instance
�� �� variables to classes
�� �� Message-ID:
�� �� <CAHN2FzeMiBL4Y8asJ0XCjS2AQdxycoN+pbc+Hsd=trMnmuiJqw@mail.gmail.com <mailto:CAHN2FzeMiBL4Y8asJ0XCjS2AQdxycoN+pbc+Hsd=trMnmuiJqw@mail.gmail.com>>
�� �� Content-Type: text/plain; charset="utf-8"

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

�� �� ---------- P?eposlan? zpr?va ----------
�� �� From: Alidra Abdelghani <alidrandco@yahoo.fr
�� �� <mailto:alidrandco@yahoo.fr>>
�� �� To:pharo-users@lists.pharo.org <mailto: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

--

�� �� �� ��

Guille Polito

Research Engineer

Centre de Recherche en Informatique, Signal et Automatique de Lille

CRIStAL - UMR 9189

French National Center for Scientific Research - _http://www.cnrs.fr_


*Web:* _http://guillep.github.io_

*Phone: *+33 06 52 70 66 13