Want for intermediate Rust book / docs: a clean cut tutorial on how to implement the Iterator trait. Took a while to figure out that for many cases we need to create a secondary struct that holds / borrows the primary struct and adds a counter / lifetimes. This isn't documented.
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Annnd my second iterator is done! Like really stoked to have this working :D :D https://github.com/datrs/sparse-bitfield/pull/7 …
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