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#![feature(rustc_attrs)]
macro_rules! check {
($expr: expr) => (
#[rustc_dummy = $expr]
use main as _;
);
}
check!("0"); // OK
check!(0); // OK
check!(0u8); //~ ERROR suffixed literals are not allowed in attributes
check!(-0); //~ ERROR unexpected expression: `-0`
check!(0 + 0); //~ ERROR unexpected expression: `0 + 0`
fn main() {}
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