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Cake day: June 16th, 2023

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  • I’m not sure if the rules are different with macros, I’ve never written one but this lint is generally caused because you set a var to a value and then overwrite that value before you use it. e.g.

    let mut a = 1; a = 2; println!(“{}”, a);

    This will throw the same warning because 1 is never used, this could’ve just been:

    let a = 2; println!(“{}”, a);

    So first I’d double check that I NEED last at all. Maybe try:

    cargo clippy

    See if it can tell you how to fix it.

    If that doesn’t work, it’s sometimes necessary to skip certain lints. E.g. if you make a library, most of the code will be flagged as dead code because it isn’t used and you can use an #[allow(dead_code)] to stop the linter warning. You might be able to use #[allow(this_linting_rule)].

    Hope something here helps.