Treating a parallel iterator as a serial iterator

[zesterer]

I'm the a peculiar situation that requires me to take an impl ParallelIterator and treat it as a standard, serial iterator. Intuitively, it feels like it should be trivially safe to pull items out of a parallel iterator serially to get back an impl Iterator, but I don't see any API features in rayon that permit this.

Is this a) possible as I presume it is and b) something that's desirable?

[wagnerf42]

could you tell us more about what you are doing ? that would help figuring out whether it is desirable or not. currently you cannot turn back to sequential.

[zesterer]

The context isn't really important here. It's not a situation I'd like to be in, but it's one that would be useful to have rayon support, given that I'd imagine pulling out items serially would be relatively trivial to do. I have an API that produces an impl ParallelIterator, and I need to pass it to another API that consumes impl Iterator.

[cuviper]

It's not trivial, or we would have solved #210 a long time ago. 😉

But there may be reasonable domain-specific options, depending on your needs.

[zesterer]

Ah, an issue for the same thing! I'll close in favour of that, thanks for bringing it to my attention.