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Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ?

by Denis Kudriashov

2017-06-07 14:53 GMT+02:00 Steven Costiou <steven.costiou(a)kloum.io>: > I want to do the following: > > B adoptInstance: a > > It does'nt work, for what i understand it is because the format of the > classes are different (B has an inst var and A has not). > Yes, #adopt checks class format. Use need to use #become to achieve what you want: a becomeForward: B new

June 7, 2017

Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ?

by Steven Costiou

I managed to do it :) What i did not say is that the subclasses (with new inst var) i want to use are anonymous subclasses. So i subclassed the SlotClassBuilder and i did: - generate an anonymous subclass from the source class - migrate my object - modify the anonymous subclass with new instance variables - rebuild the class with my own SlotClassBuilder It seems to work. I did not try how to migrate back my object to its original class but i think i might have a problem there. Also it seems very slow. Indeed it is a very certain, specific application :) Steven. Le 2017-06-07 15:32, Blondeau Vincent a Ã©crit : > So, I do not think that is possible... > > Any solution I see is either to change the superclass or to add an external object with a mapping between your new objects and the values of your new IVs. > > Or you do the migration and after you add the IV once all instances are migrated. > > But, I repeat that, as written in comments of primitiveChangeClassTo, "The facility is really provided for certain, very specific applications (mostly related to classes changing shape) and not for casual use." > > Vincent > > DE : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] DE LA PART DE Steven Costiou > ENVOYÃ : mercredi 7 juin 2017 15:18 > Ã : Any question about pharo is welcome > OBJET : Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ? > > Hi Vincent, thanks for your quick answer. > > This is the default behavior of adoptInstance: which calls primitiveChangeClassTo: > > But i specifically want to gain new inst vars, which does not work that way. > > I can't add an instvar to the superclass since i don't want to change my system. > > Steven. > > Le 2017-06-07 15:09, Blondeau Vincent a Ã©crit : > >> Hi, >> >> You should be able to do it using the method primitiveChangeClassTo: but it not recommended to do it. Are you sure that it is the only way to resolve your problem? >> >> If you really want to, an example: >> >> Object subclass: #Toto >> >> slots: { #tata } >> >> classVariables: { } >> >> category: 'Temp'. >> >> Toto subclass: #Titi >> >> slots: { } >> >> classVariables: { } >> >> category: 'Temp'. >> >> obj := Toto new. >> >> obj primitiveChangeClassTo: Titi new. >> >> obj has a new class. >> >> However, you cannot add a new instance variable this way but you keep the values of the instance. >> >> But nothing avoid you to add an empty instance variable in a superclass that only the subclass will use. >> >> I hope that it will help you >> >> Vincent >> >> DE : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] DE LA PART DE Steven Costiou >> ENVOYÃ : mercredi 7 juin 2017 14:54 >> Ã : Pharo users users >> OBJET : [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ? >> >> Hi, >> >> i'm trying to migrate an object from a given class A to a subclass of A with new inst vars. Can't get it to work. >> >> I have a class and an instance of it, say: >> >> Object subclass: #A >> instanceVariableNames: '' >> >> |a| >> >> a := A new. >> >> A has no instance variables. Now i create a subclass B of A with a new inst var: >> >> A subclass: #B >> instanceVariableNames: 'x' >> >> I want to do the following: >> >> B adoptInstance: a >> >> It does'nt work, for what i understand it is because the format of the classes are different (B has an inst var and A has not). >> >> How can i make the a object become an instance of B (subclass of a's class), making a acquiring the new inst var x (and in more complex cases keeping its own previous inst vars) ? >> >> Steven.

June 7, 2017

Re: [Pharo-users] dynamic interaction with Mondriam

by Blondeau Vincent

Hi, You should ask in the Moose list ;) Vincent > -----Message d'origine----- > De : Alidra Abdelghani [mailto:alidrandco@yahoo.fr] > EnvoyÃ© : mercredi 7 juin 2017 15:34 > Ã : pharo-users(a)lists.pharo.org > Objet : dynamic interaction with Mondriam > > Hi all, > > I would like to do some visualisations with Mondrian where you change the > visualisation by selecting actions. For instance you have : > b := RTMondrian new. > b shape rectangle withTextAbove. > b nodes:(1 to: 5). > b layout grid. > b edges connectFrom: [ :e | e + 1 ]. > b build. > b view > > then you can click a button to: > 1 display/hide the labels above the elements. > 2 display/hide some elements (all odd numbers for instance) > 3 display/hide connections between elements. > I saw a visualisation in the Roassal examples where you can add elements in a > dynamic stack grapher. So I presume it is possible to do the same with other > types of visus. > > Any hints? > Thanks in advance. > Abdelghani !!!************************************************************************************* "Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un virus transmis. This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Worldline liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted.!!!"

June 7, 2017

dynamic interaction with Mondriam

by Alidra Abdelghani

Hi all, I would like to do some visualisations with Mondrian where you change the visualisation by selecting actions. For instance you have : b := RTMondrian new. b shape rectangle withTextAbove. b nodes:(1 to: 5). b layout grid. b edges connectFrom: [ :e | e + 1 ]. b build. b view then you can click a button to: 1 display/hide the labels above the elements. 2 display/hide some elements (all odd numbers for instance) 3 display/hide connections between elements. I saw a visualisation in the Roassal examples where you can add elements in a dynamic stack grapher. So I presume it is possible to do the same with other types of visus. Any hints? Thanks in advance. Abdelghani

June 7, 2017

Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ?

by Blondeau Vincent

So, I do not think that is possibleâ¦ Any solution I see is either to change the superclass or to add an external object with a mapping between your new objects and the values of your new IVs. Or you do the migration and after you add the IV once all instances are migrated. But, I repeat that, as written in comments of primitiveChangeClassTo, âThe facility is really provided for certain, very specific applications (mostly related to classes changing shape) and not for casual use.â Vincent De : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] De la part de Steven Costiou EnvoyÃ© : mercredi 7 juin 2017 15:18 Ã : Any question about pharo is welcome Objet : Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ? Hi Vincent, thanks for your quick answer. This is the default behavior of adoptInstance: which calls primitiveChangeClassTo: But i specifically want to gain new inst vars, which does not work that way. I can't add an instvar to the superclass since i don't want to change my system. Steven. Le 2017-06-07 15:09, Blondeau Vincent a Ã©crit : Hi, You should be able to do it using the method primitiveChangeClassTo: but it not recommended to do it. Are you sure that it is the only way to resolve your problem? If you really want to, an example: Object subclass: #Toto slots: { #tata } classVariables: { } category: 'Temp'. Toto subclass: #Titi slots: { } classVariables: { } category: 'Temp'. obj := Toto new. obj primitiveChangeClassTo: Titi new. obj has a new class. However, you cannot add a new instance variable this way but you keep the values of the instance. But nothing avoid you to add an empty instance variable in a superclass that only the subclass will use. I hope that it will help you Vincent De : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] De la part de Steven Costiou EnvoyÃ© : mercredi 7 juin 2017 14:54 Ã : Pharo users users Objet : [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ? Hi, i'm trying to migrate an object from a given class A to a subclass of A with new inst vars. Can't get it to work. I have a class and an instance of it, say: Object subclass: #A instanceVariableNames: '' |a| a := A new. A has no instance variables. Now i create a subclass B of A with a new inst var: A subclass: #B instanceVariableNames: 'x' I want to do the following: B adoptInstance: a It does'nt work, for what i understand it is because the format of the classes are different (B has an inst var and A has not). How can i make the a object become an instance of B (subclass of a's class), making a acquiring the new inst var x (and in more complex cases keeping its own previous inst vars) ? Steven. !!!************************************************************************************* "Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un virus transmis. This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Worldline liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted.!!!" -- kloum.io !!!************************************************************************************* "Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un virus transmis. This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Worldline liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted.!!!"

June 7, 2017

Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ?

by Steven Costiou

Hi Vincent, thanks for your quick answer. This is the default behavior of adoptInstance: which calls primitiveChangeClassTo: But i specifically want to gain new inst vars, which does not work that way. I can't add an instvar to the superclass since i don't want to change my system. Steven. Le 2017-06-07 15:09, Blondeau Vincent a Ã©crit : > Hi, > > You should be able to do it using the method primitiveChangeClassTo: but it not recommended to do it. Are you sure that it is the only way to resolve your problem? > > If you really want to, an example: > > Object subclass: #Toto > > slots: { #tata } > > classVariables: { } > > category: 'Temp'. > > Toto subclass: #Titi > > slots: { } > > classVariables: { } > > category: 'Temp'. > > obj := Toto new. > > obj primitiveChangeClassTo: Titi new. > > obj has a new class. > > However, you cannot add a new instance variable this way but you keep the values of the instance. > > But nothing avoid you to add an empty instance variable in a superclass that only the subclass will use. > > I hope that it will help you > > Vincent > > DE : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] DE LA PART DE Steven Costiou > ENVOYÃ : mercredi 7 juin 2017 14:54 > Ã : Pharo users users > OBJET : [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ? > > Hi, > > i'm trying to migrate an object from a given class A to a subclass of A with new inst vars. Can't get it to work. > > I have a class and an instance of it, say: > > Object subclass: #A > instanceVariableNames: '' > > |a| > > a := A new. > > A has no instance variables. Now i create a subclass B of A with a new inst var: > > A subclass: #B > instanceVariableNames: 'x' > > I want to do the following: > > B adoptInstance: a > > It does'nt work, for what i understand it is because the format of the classes are different (B has an inst var and A has not). > > How can i make the a object become an instance of B (subclass of a's class), making a acquiring the new inst var x (and in more complex cases keeping its own previous inst vars) ? > > Steven. > !!!************************************************************************************* > "Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un virus transmis. > > This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Worldline liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted.!!!" -- kloum.io

June 7, 2017

Re: [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ?

by Blondeau Vincent

Hi, You should be able to do it using the method primitiveChangeClassTo: but it not recommended to do it. Are you sure that it is the only way to resolve your problem? If you really want to, an example: Object subclass: #Toto slots: { #tata } classVariables: { } category: 'Temp'. Toto subclass: #Titi slots: { } classVariables: { } category: 'Temp'. obj := Toto new. obj primitiveChangeClassTo: Titi new. obj has a new class. However, you cannot add a new instance variable this way but you keep the values of the instance. But nothing avoid you to add an empty instance variable in a superclass that only the subclass will use. I hope that it will help you Vincent De : Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] De la part de Steven Costiou EnvoyÃ© : mercredi 7 juin 2017 14:54 Ã : Pharo users users Objet : [Pharo-users] How to migrate an object to a subclass of its class but with new inst vars ? Hi, i'm trying to migrate an object from a given class A to a subclass of A with new inst vars. Can't get it to work. I have a class and an instance of it, say: Object subclass: #A instanceVariableNames: '' |a| a := A new. A has no instance variables. Now i create a subclass B of A with a new inst var: A subclass: #B instanceVariableNames: 'x' I want to do the following: B adoptInstance: a It does'nt work, for what i understand it is because the format of the classes are different (B has an inst var and A has not). How can i make the a object become an instance of B (subclass of a's class), making a acquiring the new inst var x (and in more complex cases keeping its own previous inst vars) ? Steven. !!!************************************************************************************* "Ce message et les piÃ¨ces jointes sont confidentiels et rÃ©servÃ©s Ã l'usage exclusif de ses destinataires. Il peut Ã©galement Ãªtre protÃ©gÃ© par le secret professionnel. Si vous recevez ce message par erreur, merci d'en avertir immÃ©diatement l'expÃ©diteur et de le dÃ©truire. L'intÃ©gritÃ© du message ne pouvant Ãªtre assurÃ©e sur Internet, la responsabilitÃ© de Worldline ne pourra Ãªtre recherchÃ©e quant au contenu de ce message. Bien que les meilleurs efforts soient faits pour maintenir cette transmission exempte de tout virus, l'expÃ©diteur ne donne aucune garantie Ã cet Ã©gard et sa responsabilitÃ© ne saurait Ãªtre recherchÃ©e pour tout dommage rÃ©sultant d'un virus transmis. This e-mail and the documents attached are confidential and intended solely for the addressee; it may also be privileged. If you receive this e-mail in error, please notify the sender immediately and destroy it. As its integrity cannot be secured on the Internet, the Worldline liability cannot be triggered for the message content. Although the sender endeavours to maintain a computer virus-free network, the sender does not warrant that this transmission is virus-free and will not be liable for any damages resulting from any virus transmitted.!!!"

June 7, 2017

How to migrate an object to a subclass of its class but with new inst vars ?

by Steven Costiou

Hi, i'm trying to migrate an object from a given class A to a subclass of A with new inst vars. Can't get it to work. I have a class and an instance of it, say: Object subclass: #A instanceVariableNames: '' |a| a := A new. A has no instance variables. Now i create a subclass B of A with a new inst var: A subclass: #B instanceVariableNames: 'x' I want to do the following: B adoptInstance: a It does'nt work, for what i understand it is because the format of the classes are different (B has an inst var and A has not). How can i make the a object become an instance of B (subclass of a's class), making a acquiring the new inst var x (and in more complex cases keeping its own previous inst vars) ? Steven.

June 7, 2017

Re: [Pharo-users] [ANN] Pharo 6.0 released!

by Pierce Ng

On Tue, Jun 06, 2017 at 05:11:17PM +0200, Esteban Lorenzano wrote: > The time has come for Pharo 6.0! Fantastic! Congrats and thanks for all the hard work. Pierce

June 7, 2017

Re: [Pharo-users] rewrite question

by werner kassens

On 06/07/2017 12:46 PM, werner kassens wrote: > Hi, > > where do i find the 'rewrite tool' described in the paper 'Code > Transformation by Direct Transformation of ASTs' by Rizun et al? > > werner > > > oops, found it, i read the paper a bit too fast, sorry. werner

June 7, 2017