File: union-macro.rs

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//@ run-pass

#![allow(unused_variables)]

macro_rules! duplicate {
   ($i: item) => {
        mod m1 {
            $i
        }
        mod m2 {
            $i
        }
   }
}

duplicate! {
    pub union U {
        #[allow(dead_code)]
        pub a: u8
    }
}

fn main() {
    let u1 = m1::U { a: 0 };
    let u2 = m2::U { a: 0 };
}