How do I get a BlockClosure in Squeak (I want to use BlockClosure>>callCC)?
When I write [#foo] that is a BlockContext, what's the deal?
Update: I have worked out that BlockClosure is a thing mainly of new compiler.
Instead how do I work with seaside Continuations? I'm having problems, and any examples would be appreciated.
Further update: The purpose of this is not to use seaside (at least not directly) but rather to write traversals and other such things in a way that is easier than rolling my own state-tracking iterators.
Normally, with Seaside, you never have to deal with Continuations yourself at all.
You just use #call: and #answer: from within your components.
If you're trying to do something else with Continuation other than writing a Seaside application, take a look at WAComponent>>call: for an example of usage.
Or try this. Open a Transcript window. Now, in a Workspace, select all of this code at once and Do-it:
continuation := nil.
result := Continuation currentDo: [:cc |
"store the continuation, cc, somewhere for later use"
continuation := cc.
1 ].
Transcript show: result.
You should see 1 displayed in the Transcript window. Now, in the workspace, do:
continuation value: 2
and then:
continuation value: 3
You should see each value you pass to continuation displayed in the Transcript because each value you pass to #value: causes the context of the continuation to be restored and the new value assigned to result.
Hopefully that helps...