rust/tests/ui/union/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 };
}