rust-lang/rust-clippy

from_iter_instead_of_collect / needless_collect interaction questionable

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#6,533 创建于 2021年1月1日

 (2 条评论) (0 个反应) (0 位负责人)Rust (1,391 个派生)batch import
C-enhancementI-false-negativeL-nurserygood first issue

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描述

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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