Continuations and threads (was Re: Iterators & generators)

[Gordon McMillan]

Toby Dickenson wrote:

> What are the implications for the continuation-naive in a
> post-stackless world. What about functions such as...
> 
> def x():
>     before()
>     try:
>         y()
>     finally:
>         after()
> 
> Today, either of three things happen:
> 1. before() throws
> 2. before() and after() are called exactly once each
> 3. x() never returns because y() never returns
> 
> As I understand continuations, we now have the possibility of y()
> returning more than once, with after() called more times than before()

No. In the absence of specific instructions otherwise, the 
frame dispatcher will behave as expected.

- Gordon