{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"if"}]}
    if let Some(TtElement::Leaf(tt::Leaf::Punct(punct))) = iter.peek() {
fn expect_tt<S: Copy>(iter: &mut TtIter<'_, S>) -> Result<(), ()> {
        if punct.char == '\'' {