[squeak-dev] Re: immutibility

Andreas Raab andreas.raab at gmx.de
Wed Mar 31 15:23:30 UTC 2010

On 3/31/2010 8:13 AM, Bert Freudenberg wrote:
> Show me a single place that would break in a real-world use-case.
> In fact, #become: is rarely used in Squeak because of its inherent slowness caused by our direct-pointer object model. And those rare places I can think of would work just fine.

I think there is one, and only one, place where #become: is 
intrinsically required: Changing class shape.

   - Andreas

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