File: never-type-arg.rs

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rustc 1.87.0%2Bdfsg1-1
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// Test that we can use ! as an argument to a trait impl.

//@ check-pass

#![feature(never_type)]

struct Wub;

impl PartialEq<!> for Wub {
    fn eq(&self, other: &!) -> bool {
        *other
    }
}

fn main() {
    let _ = Wub == panic!("oh no!");
}