Implement `ExactSizeIterator` for `Tuples`

rust-itertools / itertools

Extra iterator adaptors, iterator methods, free functions, and macros.

https://docs.rs/itertools/

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Implement `ExactSizeIterator` for `Tuples` #761

Closed Philippe-Cholet closed 1 year ago

Philippe-Cholet commented 1 year ago

I was hunting missing size_hint specializations for a few weeks now and from my notes, Tuples is apparently the penultimate one. (TupleCombinations should be the last one.)