Underscore assignments

> +1
>
>
> --
> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

> +1
>
>
> --
> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>

> Mike
>
> On Wednesday, November 4, 2009, Torsten Bergmann <[hidden email]> wrote:
>> +1
>>
>>
>> --
>> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
>> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [hidden email]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>

>> Hi torsten , just curious what mailer you use? it seems that all your
>> emails break the threading. This is very apparent when reading the
>> list via gmail. I wasn't sure if you knew. Just thought I would
>> mention it.
>
> It annoys me too :-)
>
> Lukas
>
>
>> Mike
>>
>> On Wednesday, November 4, 2009, Torsten Bergmann <[hidden email]> wrote:
>>> +1
>>>
>>>
>>> --
>>> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
>>> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>>>
>>> _______________________________________________
>>> Pharo-project mailing list
>>> [hidden email]
>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>>
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [hidden email]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>

> I committed SLICE-DoNotCompileUnderscoreAssignments-LukasRenggli.
> 1.mcz.
>
> The only change is that the compiler refuses to compile underscore
> assignments. It seems to be problematic to throw a deprecated message,
> as this can happen in all kind of weird situations. So now you just
> get a syntax error, or in interactive mode (when loading with
> Monticello) a popup that gives you the possibility to fix the code. I
> suggest to integrate that into Pharo 1.0. Loading old code is a bit
> cumbersome, but I guess most people already fixed their code-base.

>
> Lukas
>
> 2009/11/4 Lukas Renggli <[hidden email]>:
>>> Hi torsten , just curious what mailer you use? it seems that all  
>>> your
>>> emails break the threading. This is very apparent when reading the
>>> list via gmail. I wasn't sure if you knew. Just thought I would
>>> mention it.
>>
>> It annoys me too :-)
>>
>> Lukas
>>
>>
>>> Mike
>>>
>>> On Wednesday, November 4, 2009, Torsten Bergmann <[hidden email]>  
>>> wrote:
>>>> +1
>>>>
>>>>
>>>> --
>>>> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
>>>> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>>>>
>>>> _______________________________________________
>>>> Pharo-project mailing list
>>>> [hidden email]
>>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>>>
>>>
>>> _______________________________________________
>>> Pharo-project mailing list
>>> [hidden email]
>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>>
>>
>>
>>
>> --
>> Lukas Renggli
>> http://www.lukas-renggli.ch
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

>> The only change is that the compiler refuses to compile underscore
>> assignments. It seems to be problematic to throw a deprecated message,
>> as this can happen in all kind of weird situations. So now you just
>> get a syntax error, or in interactive mode (when loading with
>> Monticello) a popup that gives you the possibility to fix the code. I
>> suggest to integrate that into Pharo 1.0. Loading old code is a bit
>> cumbersome, but I guess most people already fixed their code-base.
>
> really in 1.0
> we should pay attention because we want as few as possible of fixes in
> 1.0 :)

> I committed SLICE-DoNotCompileUnderscoreAssignments-LukasRenggli.
> 1.mcz.
>
> The only change is that the compiler refuses to compile underscore
> assignments. It seems to be problematic to throw a deprecated message,
> as this can happen in all kind of weird situations. So now you just
> get a syntax error, or in interactive mode (when loading with
> Monticello) a popup that gives you the possibility to fix the code. I
> suggest to integrate that into Pharo 1.0. Loading old code is a bit
> cumbersome, but I guess most people already fixed their code-base.
>
> Next we can add underscore characters to the compiler in Pharo 1.1.
> Supporting underscore identifiers and assignments at the same time
> seems to be tricky, as there are all kinds of new ambiguities:
> a_1negated could be an assignment of 1 negated to a, or an access of
> the variable a_1negated :-/
>
> Lukas
>
> 2009/11/4 Lukas Renggli <[hidden email]>:
>>> Hi torsten , just curious what mailer you use? it seems that all  
>>> your
>>> emails break the threading. This is very apparent when reading the
>>> list via gmail. I wasn't sure if you knew. Just thought I would
>>> mention it.
>>
>> It annoys me too :-)
>>
>> Lukas
>>
>>
>>> Mike
>>>
>>> On Wednesday, November 4, 2009, Torsten Bergmann <[hidden email]>  
>>> wrote:
>>>> +1
>>>>
>>>>
>>>> --
>>>> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
>>>> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>>>>
>>>> _______________________________________________
>>>> Pharo-project mailing list
>>>> [hidden email]
>>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>>>
>>>
>>> _______________________________________________
>>> Pharo-project mailing list
>>> [hidden email]
>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>>
>>
>>
>>
>> --
>> Lukas Renggli
>> http://www.lukas-renggli.ch
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

>> Hi torsten , just curious what mailer you use? it seems that all your
>> emails break the threading. This is very apparent when reading the
>> list via gmail. I wasn't sure if you knew. Just thought I would
>> mention it.
>
> It annoys me too :-)
>
> Lukas
>
>
>> Mike
>>
>> On Wednesday, November 4, 2009, Torsten Bergmann <[hidden email]> wrote:
>>> +1
>>>
>>>
>>> --
>>> GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
>>> Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
>>>
>>> _______________________________________________
>>> Pharo-project mailing list
>>> [hidden email]
>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>>
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [hidden email]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>

> Lukas Renggli wrote:
>
>> Supporting underscore identifiers and assignments at the same time
>> seems to be tricky, as there are all kinds of new ambiguities:
>> a_1negated could be an assignment of 1 negated to a, or an access of
>> the variable a_1negated :-/
>
> GemStone has supported both for the past couple of years. The rule we
> use is that _ must have whitespace on both sides to be considered
> assignment, otherwise it's part of a selector or variable name.
>
> This allowed us to continue using _ in selectors and variables, which
> we'd allowed from the very beginning, and made it easier to port Squeak
> code to GemStone.
>
> I'm not sure we've run across *any* code in actual use that uses
> underscore assignment without surrounding it with whitespace; certainly
> most code does put whitespace around assignments.
>
>
> Regards,
>
> -Martin
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>

>
> Cheers,
> Lukas
>
> 2009/11/4 Martin McClure <[hidden email]>:
>> Lukas Renggli wrote:
>>
>>> Supporting underscore identifiers and assignments at the same time
>>> seems to be tricky, as there are all kinds of new ambiguities:
>>> a_1negated could be an assignment of 1 negated to a, or an access of
>>> the variable a_1negated :-/
>>
>> GemStone has supported both for the past couple of years. The rule we
>> use is that _ must have whitespace on both sides to be considered
>> assignment, otherwise it's part of a selector or variable name.
>>
>> This allowed us to continue using _ in selectors and variables, which
>> we'd allowed from the very beginning, and made it easier to port  
>> Squeak
>> code to GemStone.
>>
>> I'm not sure we've run across *any* code in actual use that uses
>> underscore assignment without surrounding it with whitespace;  
>> certainly
>> most code does put whitespace around assignments.
>>
>>
>> Regards,
>>
>> -Martin
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [hidden email]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

>>>    Preferences disable: #allowUnderscoreAssignment
>>
>> I did that, but I can still compile assignments with underscores.
>>
>> Do I miss anything?
>
> No, it is me that is totally confused tonight.
>
> You also need to evaluate the following expression:
>
>  (Scanner classPool at: #TypeTable) at: $_ asciiValue put: #xLetter
>
> Afterwards you can create classes, inst-vars, methods, etc. that have
> an underscore inside.
>
> Lukas
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

>>>    Preferences disable: #allowUnderscoreAssignment
>>
>> I did that, but I can still compile assignments with underscores.
>>
>> Do I miss anything?
>
> No, it is me that is totally confused tonight.
>
> You also need to evaluate the following expression:
>
>  (Scanner classPool at: #TypeTable) at: $_ asciiValue put: #xLetter
>
> Afterwards you can create classes, inst-vars, methods, etc. that have
> an underscore inside.
>
> Lukas
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project

> so does it make sense that I integrate your changes?
>
> Stef
>
> On Nov 4, 2009, at 10:35 PM, Lukas Renggli wrote:
>
>>>>    Preferences disable: #allowUnderscoreAssignment
>>>
>>> I did that, but I can still compile assignments with underscores.
>>>
>>> Do I miss anything?
>>
>> No, it is me that is totally confused tonight.
>>
>> You also need to evaluate the following expression:
>>
>>  (Scanner classPool at: #TypeTable) at: $_ asciiValue put: #xLetter
>>
>> Afterwards you can create classes, inst-vars, methods, etc. that have
>> an underscore inside.
>>
>> Lukas
>>
>> --
>> Lukas Renggli
>> http://www.lukas-renggli.ch
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [hidden email]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>

> Please wait, I can prepare a complete patch for Pharo 1.1.
>
> I suggest that we just set the following preference in Pharo 1.0:
>
>     Preferences disable: #allowUnderscoreAssignment
>
> Lukas
>
>
>
> 2009/11/5 Stéphane Ducasse <[hidden email]>:
>> so does it make sense that I integrate your changes?
>>
>> Stef
>>
>> On Nov 4, 2009, at 10:35 PM, Lukas Renggli wrote:
>>
>>>>>    Preferences disable: #allowUnderscoreAssignment
>>>>
>>>> I did that, but I can still compile assignments with underscores.
>>>>
>>>> Do I miss anything?
>>>
>>> No, it is me that is totally confused tonight.
>>>
>>> You also need to evaluate the following expression:
>>>
>>>  (Scanner classPool at: #TypeTable) at: $_ asciiValue put: #xLetter
>>>
>>> Afterwards you can create classes, inst-vars, methods, etc. that  
>>> have
>>> an underscore inside.
>>>
>>> Lukas
>>>
>>> --
>>> Lukas Renggli
>>> http://www.lukas-renggli.ch
>>>
>>> _______________________________________________
>>> Pharo-project mailing list
>>> [hidden email]
>>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>>
>> _______________________________________________
>> Pharo-project mailing list
>> [hidden email]
>> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>>
>
>
>
> --
> Lukas Renggli
> http://www.lukas-renggli.ch
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project