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Programmatic generation of new class

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Brad Selfridge

Programmatic generation of new class

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Brad Selfridge

mbratch

Re: Programmatic generation of new class

Try putting parentheses around `aDescriptorSystemClassName asSymbol`:

descriptorSystem :=
DynamicDescriptorSystem subclass: (aDescriptorSystemClassName asSymbol)
instanceVariableNames: ''
classVariableNames: ''
package: packageName asString

On Fri, Jul 29, 2016 at 10:50 AM Brad Selfridge <[hidden email]> wrote:

I'm trying to programmatically generate a new class, but am getting the
following error:

DynamicDescriptorSystem class(Object)>>doesNotUnderstand:
#subclass:instanceVariableNames:classVariableNames:package:

This is the method that I'm trying to execute:

buildNewDescriptorSystemUsing: aDescriptorSystemClassName

descriptorSystem :=
DynamicDescriptorSystem subclass: aDescriptorSystemClassName asSymbol
instanceVariableNames: ''
classVariableNames: ''
package: packageName asString

I see examples of this all over Pharo and I copied this code almost
verbatim.

What am I doing wrong?

-----
Brad Selfridge
--
View this message in context: http://forum.world.st/Programmatic-generation-of-new-class-tp4908659.html
Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

Blondeau Vincent

Re: Programmatic generation of new class

Hi,

The parentheses are not useful here: the unary message send (asSymbol) is made before the keyword one (subclass:instanceVariableNames:classVariableNames:packageJ

I tried :

Object subclass: 'Foo' asSymbol instanceVariableNames: '' classVariableNames: '' package: 'AAA' asString

On a fresh Pharo5.0 image and it works nice.

Vincent

De : Pharo-users [mailto:[hidden email]] De la part de Mark Bratcher
Envoyé : vendredi 29 juillet 2016 17:00
À : Any question about pharo is welcome
Objet : Re: [Pharo-users] Programmatic generation of new class

Try putting parentheses around `aDescriptorSystemClassName asSymbol`:

descriptorSystem :=
DynamicDescriptorSystem subclass: (aDescriptorSystemClassName asSymbol)
instanceVariableNames: ''
classVariableNames: ''
package: packageName asString

On Fri, Jul 29, 2016 at 10:50 AM Brad Selfridge <[hidden email]> wrote:

I'm trying to programmatically generate a new class, but am getting the
following error:

DynamicDescriptorSystem class(Object)>>doesNotUnderstand:
#subclass:instanceVariableNames:classVariableNames:package:

This is the method that I'm trying to execute:

buildNewDescriptorSystemUsing: aDescriptorSystemClassName

descriptorSystem :=
DynamicDescriptorSystem subclass: aDescriptorSystemClassName asSymbol
instanceVariableNames: ''
classVariableNames: ''
package: packageName asString

I see examples of this all over Pharo and I copied this code almost
verbatim.

What am I doing wrong?

-----
Brad Selfridge
--
View this message in context: http://forum.world.st/Programmatic-generation-of-new-class-tp4908659.html
Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Peter Uhnak

Re: Programmatic generation of new class

In reply to this post by Brad Selfridge

Can you show the full trace? Because I am regularly doing something similar without any problems.
In fact if I copy/paste your code (and just change the classes that I have) it works fine.

Btw. did you override such methods in your system?

Peter

On Fri, Jul 29, 2016 at 07:05:04AM -0700, Brad Selfridge wrote:

> I'm trying to programmatically generate a new class, but am getting the
> following error:
>
> DynamicDescriptorSystem class(Object)>>doesNotUnderstand:
> #subclass:instanceVariableNames:classVariableNames:package:
>
> This is the method that I'm trying to execute:
>
> buildNewDescriptorSystemUsing: aDescriptorSystemClassName
>
> descriptorSystem :=
> DynamicDescriptorSystem subclass: aDescriptorSystemClassName asSymbol
> instanceVariableNames: ''
> classVariableNames: ''
> package: packageName asString
>
> I see examples of this all over Pharo and I copied this code almost
> verbatim.
>
> What am I doing wrong?
>
>
>
> -----
> Brad Selfridge
> --
> View this message in context: http://forum.world.st/Programmatic-generation-of-new-class-tp4908659.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>

Ben Coman

Re: Programmatic generation of new class

In reply to this post by Brad Selfridge

On Fri, Jul 29, 2016 at 10:05 PM, Brad Selfridge <[hidden email]> wrote:

*very* strange. That looks correct. The only thing I can think of is
that you copy/pasted from somewhere and ended up with a hidden
character or strange unicode character that looks like a character but
is not. Just for an experiments, can you try:
* Type it all out by hand
* Using ALL strings rather than those two calls.
* Change DynamicDescriptorSystem for Object.
* Try in a freshly downloaded Image.

cheers -ben

Clément Béra

Re: Programmatic generation of new class

In reply to this post by Peter Uhnak

On old versions of Pharo you need to use:

#subclass:instanceVariableNames:classVariableNames:poolDictionaries:package:

That might be it.

On Fri, Jul 29, 2016 at 6:14 PM, Peter Uhnak <[hidden email]> wrote:

Can you show the full trace? Because I am regularly doing something similar without any problems.
In fact if I copy/paste your code (and just change the classes that I have) it works fine.

Btw. did you override such methods in your system?

Peter

On Fri, Jul 29, 2016 at 07:05:04AM -0700, Brad Selfridge wrote:
> I'm trying to programmatically generate a new class, but am getting the
> following error:
>
> DynamicDescriptorSystem class(Object)>>doesNotUnderstand:
> #subclass:instanceVariableNames:classVariableNames:package:
>
> This is the method that I'm trying to execute:
>
> buildNewDescriptorSystemUsing: aDescriptorSystemClassName
>
> descriptorSystem :=
> DynamicDescriptorSystem subclass: aDescriptorSystemClassName asSymbol
> instanceVariableNames: ''
> classVariableNames: ''
> package: packageName asString
>
> I see examples of this all over Pharo and I copied this code almost
> verbatim.
>
> What am I doing wrong?
>
>
>
> -----
> Brad Selfridge
> --
> View this message in context: http://forum.world.st/Programmatic-generation-of-new-class-tp4908659.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>

Brad Selfridge

Re: Programmatic generation of new class

I forgot to mention that I'm working in Pharo 4.0. I changed the "package:" parameter to "category:" and it worked like a charm. I guess that I need to move up to Pharo 5.0 pretty soon.

Brad Selfridge

Tudor Girba-2

Re: Programmatic generation of new class

> On Jul 29, 2016, at 8:07 PM, Brad Selfridge <[hidden email]> wrote:
>
> I forgot to mention that I'm working in Pharo 4.0. I changed the "package:"
> parameter to "category:" and it worked like a charm. I guess that I need to
> move up to Pharo 5.0 pretty soon.

Yes, you do :)

Doru

>
>
> -----
> Brad Selfridge
> --
> View this message in context: http://forum.world.st/Programmatic-generation-of-new-class-tp4908659p4908717.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>

--
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