What are Scala continuations and why use them?

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My blog does explain what reset and shift do, so you may want to read that again.

Another good source, which I also point in my blog, is the Wikipedia entry on continuation passing style. That one is, by far, the most clear on the subject, though it does not use Scala syntax, and the continuation is explicitly passed.

The paper on delimited continuations, which I link to in my blog but seems to have become broken, gives many examples of usage.

But I think the best example of the concept of delimited continuations is Scala Swarm. In it, the library stops the execution of your code at one point, and the remaining computation becomes the continuation. The library then does something — in this case, transferring the computation to another host, and returns the result (the value of the variable which was accessed) to the computation that was stopped.

Now, you don’t understand even the simple example on the Scala page, so do read my blog. In it I’m only concerned with explaining these basics, of why the result is 8.

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