File: inner-attr-metavar.rs

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rustc 1.88.0%2Bdfsg1-1
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//@ check-pass
//
// During `Nonterminal` removal (#124141) there was at one point a problem with
// calling from_ast on expressions with inner attributes within metavars -- the
// inner attributes were being inserted in the wrong place in `from_ast`. This
// test covers that case.

macro_rules! m3 { ($e:expr) => {} }
macro_rules! m2 { ($e:expr) => { m3!($e); } }
macro_rules! m1 { ($e:expr) => { m2!($e); } }

m1!({ #![allow(unused)] 0 });

fn main() {}