rust-lang/rust-clippy

from_iter_instead_of_collect / needless_collect interaction questionable

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#6533 aperta il 1 gen 2021

 (2 commenti) (0 reazioni) (0 assegnatari)Rust (1391 fork)batch import
C-enhancementI-false-negativeL-nurserygood first issue

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Descrizione

for _i in Vec::from_iter([1, 2, 3].iter()) {}

clippy will suggest to use .collect() instead of from_iter() here but blindly replacing will not work because .collect() will need some kind of type hint.

Them again

for _i in [1, 2, 3].iter().collect::<Vec<&i32>>() {}

does not trigger clippy::needless_collect (although it should!; neither does the first example) because we can iterate over

for _i in [1, 2, 3].iter() {}

directly.

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