{"ast_node_type":"function","tokens":[{"end":79,"kind":"keyword","start":0,"text":"fn"}]}
    fn recover_not_expr(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
    /// Recover on `not expr` in favor of `!expr`.
        let negated_token = self.look_ahead(1, |t| *t);