On Sun, 24 Oct 2010, Johan Brichau wrote:
On 24 Oct 2010, at 08:42, Stéphane Ducasse wrote:
Well, Traits are in Squeak since 2006, IIRC they were available a few years
earlier. So in the last X (at least 4) years the only good candidate to become
a Trait was Magnitude.
PolyMorphic also uses traits.
Where can I find it?
There are non-core projects that also use them, for example WebTester.
I don't see any trait in the latest version, though I used SqueakSource's
web interface.
I can also name several occassions in the development of our application, where
we considered using traits to avoid code duplication. The only reason we didn't
was because of a need for portability to GS. But if I understood correctly,
it's quite possible that GS will support them in the future.
Traits are being added to many other languages as well (e.g. traitsjs.org). It
would be a shame to remove them from Squeak/Pharo Smalltalk now.
I'm not saying that trait-like composition is bad, I only say that there's
a better approach.
Levente
just my 2 cents,
Johan
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