`unused_parens` is not emitted for exprs used in macro.

[lcnr]

fn main() {
    let x = vec![((8))];
    println!("Hello, world!, {:?}",x);
}

and

fn main() {
    println!("Hello, world!, {:?}", ((8)));
}

do not have any warnings while

fn main() {
    let x = ((8));
    println!("Hello, world!, {:?}",x);
}

emits unused_parens.

I expect the first two snippets to also cause this warning.

---

note: is there a way to add labels to an issue without being a member?

[jonas-schievink]

note: is there a way to add labels to an issue without being a member?

Yes!

[lcnr]

@rustbot modify labels: +A-diagnostics, +A-macros

[rustbot]

Error: Label P-low can only be set by Rust team members

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