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Github New lint: `unused_async` by InquisitivePenguin · Pull Request #7225 · rus...

 3 years ago
source link: https://github.com/rust-lang/rust-clippy/pull/7225
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changelog: Adds a lint, unused_async, which checks for async functions with no await statements

unused_async is a lint that reduces code smell and overhead by encouraging async functions to be refactored into synchronous functions.

Fixes #7176

Examples

async fn get_random_number() -> i64 {
    4 // Chosen by fair dice roll. Guaranteed to be random.
}

Could be written as:

fn get_random_number() -> i64 {
    4 // Chosen by fair dice roll. Guaranteed to be random.
}

Something like this, however, should not be caught by clippy:

#[async_trait]
trait AsyncTrait {
    async fn foo();
}

struct Bar;

#[async_trait]
impl AsyncTrait for Bar {
    async fn foo() {
        println!("bar");
    }
}

report

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