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[`useless_vec`]: lint on `vec![_]` invocations that adjust to a slice by y21 · P...
source link: https://github.com/rust-lang/rust-clippy/pull/10933
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Fixes #2262 (well, actually my PR over at #10901 did do most of the stuff, but this PR implements the one last other case mentioned in the comments that my PR didn't fix)
Before this change, it would lint (&vec![1]).iter().sum::<i32>(), but not vec![1].iter().sum::<i32>(). This PR handles this case.
This also refactors a few things that I wanted to do in my other PR but forgot about.
changelog: [useless_vec]: lint on vec![_] invocations that adjust to a slice
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