Hi Christoph.

> And you should *really* only use this in tests :-)

Then, as a first step, re-design (and re-name) DynamicObject to not be confused with other use cases. What about mapping the idea of Dictionary class >> #newFrom: to Class or ClassDescription? Make it easier to add/remove methods to/from classes in scripts and tests.

Best,
Marcel
Am 26.04.2020 20:10:15 schrieb Thiede, Christoph <christoph.thiede at student.hpi.uni-potsdam.de>:
I agree with all your comments about confusion.
Still, there is one thing you could do with this approach of "DynamicObjects" which our usual meta protocol does not support afaik:


d := DynamicObject withMethods: {
    'somePrefix*' -> [:sel | sel allButFirst: 'somePrefix' size].
    'selector(Regex)+' asRegex -> [:match | match size - 'selector' size / 'Regex' size]
} asDictionary.
d somePrefixBanana. "'Banana'"
d selectorRegexRegexRegex. "3"

And you should *really* only use this in tests :-)

@Torge: Interesting point. I could only find a ReverseTrampoline [http://www.metaobject.com/downloads/Squeak/HOM.cs] (by googling for smalltalk "subclass trampoline"). :-)

Best,
Christoph


Von: Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im Auftrag von Taeumel, Marcel
Gesendet: Montag, 20. April 2020 11:03 Uhr
An: gettimothy via Squeak-dev
Betreff: Re: [squeak-dev] DynamicObjects
 
Uhh! This feels like JavaScript ... :o) I would rather work on improving Squeak's meta-object protocol and with it class construction and refinement. Especially for tests. Let's not undermine the idea of having classes in Smalltalk.

-1 for DynamicObject.

Objects in Squeak/Smalltalk are quite dynamic already. That name is misleading. :-)

Best,
Marcel
Am 18.04.2020 19:55:05 schrieb Thiede, Christoph <christoph.thiede at student.hpi.uni-potsdam.de>:
d := DynamicObject withMethods: {
#origin -> [2 @ 3].
#corner -> [3 @ 7] } asDictionary.
d origin "2 at 3"

Did we already have something like this for Squeak? May this become a pattern for situations where you actually don't need a class (e. g., when writing very small mock objects for tests)?

d := DynamicObject new.
d xxxMethodAt: #foo put: [self inform: 'Hi!'].
d xxxMethodAt: #foo: put: [:x | x halt].
d foo: 3.

Best,
Christoph
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