Ya, in fact when traits (If I recall correctly) were first introduced  
I started getting complains about the JPEG primitive decoder failing.  
Turns out it uses the "known" order of instance variables to read  
data into C variables so it can do calculations. Earlier versions of  
Traits, changed the order, that would break the math and decisions in  
the decoder primitive, so it would fail.

Of course everything in the smalltalk walkback looked fine...


On Aug 20, 2007, at 10:29 PM, Craig Latta wrote:

>
> Hi Göran--
>
> > ...do we care about changing the ORDER of say instvars?
>
>      I think we should, if we are to support direct installation of  
> compiled methods (without recompiling from source code), since  
> methods use instructions that refer to the receiver's instance  
> variables explicitly by field index.
>
>
> -C
>
> --
> Craig Latta
> improvisational musical informaticist
> www.netjam.org
> Smalltalkers do: [:it | All with: Class, (And love: it)]
>
>

--
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John M. McIntosh <johnmci at smalltalkconsulting.com>
Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
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