I have been devoting a lot of my free time in the past month to thinking about structured concurrency, and a blog post about that is coming soon, but first I want to revisit iterators and generators.

In a previous post, I wrote about one of the hardest problems for generators: self-referential generators. Unlike the Future trait when we were designing async functions, the Iterator trait is already stable, and it does not take a pinned reference to itself. This means an Iterator cannot be self-referential.

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