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by bilkow 2096 days ago
I don't think Range is intended to be a 100% solution at all. It only supports iteration over integers and slice indexing over a specific integer size, which are its main use cases. Also the author is exaggerating on the footgun, as Range is explicitly end-exclusive, and the Regex is explicitly end-inclusive (e.g. [a-z] includes z), so a RangeInclusive should be a straightforward decision.

Yes, I think it was a rushed type which should be a lot more constrained on 1.0 to allow for modifications later, which is how stuff is usually done in Rust. It also probably should have implemented IntoIterator instead of Iterator directly. It may also be my least favorite Rust type, but I don't think it's really that bad, and I'm thankful for whoever designed it as I find it still much better than slice-specific indexing syntax.

1 comments

The footgun is not just the exclusivity but the fact that `RangeInclusive` has an extra bool field and so is wastefully large for use cases that need the inclusivity. i.e. it's a perf footgun.