Question

How do you emulate Python style generators in your favorite language? I found this one in Scheme. It must be interesting to see other implementations, especially in those languages that don’t have first-class continuations.

Answer 1

Here is an example in C++ that simulates generators using fibers:

Yield Return Iterator for Native C++ Using Fibers

The “yield return” iterator is a
language feature that was created for
one reason: simplicity. It is
generally much easier to iterate
across whole collectionl, storing all
context needed in local variables,
rather than crafting a complicated,
custom iterator object that stores its
state across subsequent retrieval
operations.

There are also the primitive C routines setjmp, longjmp to achieve similar results.
(Lua coroutines are implemented with the above method)