[squeak-dev] Immediate array of objects?
Stephen Travis Pope
stephen at heaveneverywhere.com
Thu Jan 5 05:52:59 UTC 2023
Thanks for the clarification, Eliot!
stp
--------
Stephen Travis Pope Ojai, California, USA

http://HeavenEverywhere.com
http://FASTLabInc.com
https://vimeo.com/user19434036/videos
http://heaveneverywhere.com/Reflections
> On Jan 4, 2023, at 8:59 PM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
>
>
>
>> On Jan 4, 2023, at 8:04 AM, Stephen Travis Pope <stephen at heaveneverywhere.com> wrote:
>>
>>
>>
>> Hello all,
>>
>> Has the interpretation of immediate arrays, i.e., #(obj1 obj2) changed?
>
> BTW, the correct terminology is “literal arrays”. “Immediate” is used to describe instances of SmallInteger, Character, and SmallFloat64, which are encoded directly in a tagged pointer, i.e. there is no “box” fir the object.
>
> There was a change in the compilation of literal arrays from Smalltalk-80 v2 (blue book) to (a little before) the ANSI standard. Before, any unquoted string was interpreted as a Symbol, so #(nil true false) collect: [:t| t class] answered Array with: Symbol with: Symbol with: Symbol. The change was to interpret exactly these three unquoted strings as referring to the objects nil, true, and false. So now #(nil true false) collect: [:t| t class] answers {UndefinedObject. True. False}.
>
>> I have loads of code (from ST80) that creates arrays of intervals like,
>>
>> #((80 to: 90) (60 to: 70))
>>
>> where what I want is,
>>
>> (Array with: (80 to: 90) with: (60 to: 70))
>>
>> but Squeak reads this as,
>>
>> ampl: #(#(80 #to: 90) #(60 #to: 70))
>>
>> Am I missing something?
>>
>> stp
>>
>> --------
>>
>> Stephen Travis Pope Ojai, California, USA
>>
> <pastedGraphic.tiff>
>>
>> http://HeavenEverywhere.com
>> http://FASTLabInc.com
>> https://vimeo.com/user19434036/videos
>> http://heaveneverywhere.com/Reflections
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