rust-lang/rust-clippy

New lint: wildcard pattern in let

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#4 090 ouverte le 13 mai 2019

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A-lintL-restrictiongood first issue

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Description

I think there should be a warning about the wildcard pattern in let. I can't imagine any situation where this makes sense, and there are cases where it's a mistake caused by taking _ for identifier though it's not.

Wrong:

{
    let _ = my scope guard or whatever
    // dropped right away

    do stuff
}

Correct:

{
    let _g = my scope guard or whatever

    do stuff

    // dropped at the end of the scope
}

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