Stackless Python and Python 2.x

[Tim Peters]

[Tim]
> and chapter 2 shows in excruciatingly detail how to implement
> CLU iterators>(also semi-coroutines) using almost-standard C, abusing
> the C stack via setjmp/longjmp tricks.

[Courageous]
> Sure; however, if you proposed something like this in either the C or
> C++ newsgroups, you'd get your heard torn off. It's simply not portable.

Didn't "almost-standard" and "abusing" imply "but not standard" to you?  If
so, doesn't "but not standard" imply "not portable" too?  Does to me.

> The standard doesn't require that you be allowed to jump up the stack.

It doesn't matter.  Paul asked how generators can be implemented short of
full-blown coroutines or continuations.  The text I pointed him to showed
one way it can be done using a single stack.  If he's willing to accept
continuations as an implementation technique, the ways in which the
referenced technique run afoul of standard C are trivial by comparison.  C
isn't the point here; "single stack" is.