rust/tests/pretty/macro_rules.rs

// pp-exact

macro_rules! brace { () => {}; }

macro_rules! bracket[() => {};];

macro_rules! paren(() => {};);

macro_rules! matcher_brackets {
    (paren) => {}; (bracket) => {}; (brace) => {};
}

macro_rules! all_fragments {
    ($b : block, $e : expr, $i : ident, $it : item, $l : lifetime, $lit :
    literal, $m : meta, $p : pat, $pth : path, $s : stmt, $tt : tt, $ty : ty,
    $vis : vis) => {};
}

fn main() {}