API documentation for the Rust IntoIterator trait in crate std.
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One benefit of implementing IntoIterator is that your type will work with Rust's for loop syntax.
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とあるので、これがSwiftのSequence相当かな
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pub trait IntoIterator where <Self::IntoIter as Iterator>::Item == Self::Item, { type Item; type IntoIter: Iterator; fn into_iter(self) -> Self::IntoIter; }
