[squeak-dev] Fwd: [Pharo-project] type-inference: it works!
eliot.miranda at gmail.com
Thu Apr 5 17:10:02 UTC 2012
On Wed, Apr 4, 2012 at 4:59 AM, Levente Uzonyi <leves at elte.hu> wrote:
> On Wed, 4 Apr 2012, Frank Shearar wrote:
> I ported Francisco Garau's TypeInference engine to Squeak (well,
>> changed the one thing I needed to make it run on Squeak), and Marcus
>> noted the following:
>> Marcus Denker <marcus.denker at inria.fr> says:
>>>> It turns out that in Pharo we use Association and in Squeak we use
>>>> ReadOnlyVariableBinding; by changing VariableNode >> #isSharedVarNode
>> You should think about cleaning that up... in the SystemDictonary, old
>>> are ReadOnlyVariableBinding, new ones are Associations. The code to make
>>> a binding into a ReadOnlyVariableBinding is never called...
>> Given that I know next to nothing about this part of Squeak, I offer
>> it up to those more knowledgeable than I for assessment!
> Markus is right, the code is not called, but I'm not sure it shouldn't be
> called. Just try the following in a throw-away image:
> Object subclass: #Foo
> instanceVariableNames: ''
> classVariableNames: ''
> poolDictionaries: ''
> category: 'Foo'.
> Foo := 1.
> The value of Foo will be 1 and your browser will go nuts when you try to
> browse the Foo category.
Right. ReadOnlyVariableBinding is a *good* idea! (with
evaluating Foo := 1 will raise an error).
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