File: macro-span-replacement.rs

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rustc 1.87.0%2Bdfsg1-1
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//@ check-pass

#![warn(unused)]

macro_rules! m {
    ($a:tt $b:tt) => {
        $b $a;
    }
}

fn main() {
    m!(S struct); //~ WARN struct `S` is never constructed
}