[Seaside-dev] Dictionary backtracking compatibility in Squeak 4.1

[Lukas Renggli]

> Since I'd like to see the issue addressed before 4.1 goes out, I'm asking
> about advice on how to resolve it best. The options that I see:
>
> 1. Implement #snapshotCopy and #restoreFromSnapshot: in Dictionary in the
> Grease-Pharo-Core package. To me, this is the best way to fix the issue
> because it seems likely that Pharo will follow suit with HashedCollection
> which will require Seaside to provide this compatibility implementation
> anyway. Implementing this now is simply an anticipation of this situation at
> virtually no extra cost.

I've copied the snapshot code from Set to Dictionary in
Grease-Pharo-Core. I think this is the cleanest solution and will
avoid compatibility problems not only with Squeak, but also if Pharo
introduces the HashedCollection:

Name: Seaside-Pharo-Core-lr.6
Author: lr
Time: 31 March 2010, 8:20:18 am
UUID: 7c64361d-8194-4883-94b7-740fcd54d8e0
Ancestors: Seaside-Pharo-Core-lr.5

- duplicate the snapshot code from Set into Dictionary (in Squeak
Dictionary is not a subclass of Set)

Thanks for raising the issue.

Lukas

-- 
Lukas Renggli
http://www.lukas-renggli.ch