[Newbies] Chronos package loading error
leves at elte.hu
Wed Mar 9 11:19:45 UTC 2011
On Tue, 8 Mar 2011, Paul DeBruicker wrote:
> Hi -
> Chronos (http://www.chronos-st.org & http://www.squeaksource.com/Chronos )
> would load into and work in Squeak 3.9, but it won't load into 4.2. The error
> given is 'Futures must be sent messages' I think this comes up because
> Chronos has a class InfiniteTimepoint that has two class side methods:
> InfiniteTimepoint class >> polarity: polarity
> ^polarity ifTrue: [self future] ifFalse: [self past]
> InfiniteTimepoint class >> future
> Future == nil
> [Future :=
> (self basicNew)
> For some reason when polarity: is compiled it is using Object>>future rather
> than the version of future that is defined by InfiniteTimepoint.
> Is there any way to change the load/compile order of those two methods when
> loading into 4.2? I know I could rename the InfiniteTimepoint version of
> future to something else but its a package that works as is on VisualWorks,
> Dolphin, Pharo, and Gemstone. So I'd either maintain a separate version for
> squeak or have to get the package maintainer to make a change for all
> platforms and users.
> I'm using linux and the all-in-one app from squeak.org
> Thanks for any guidance you can provide.
#future and #future: sends are inlined by the compiler. Currently there's
no way to turn this off, but it can be easily implemented. IIRC Croquet
needs these methods to be inlined.
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