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Implement DoubleEndedIterator for CaseMappingIter #60112
Apr 19, 2019
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Team member @Amanieu has proposed to merge this. The next step is review by the rest of the tagged team members:
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There is no real point, it's mostly for consistency, I cannot see the CaseMappingIter ever changing in a way which would cause issues with having a DoubleEndedIterator implementation.
About ExactSizeIterator, it was implemented in #58778 (although ExactSizeIterator is somewhat more useful), which I did implement while considering a potential Clippy lint requiring