{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"Ok(this.mk_expr(this.prev_token.span,"}]}
                Ok(this.mk_expr(this.prev_token.span, ExprKind::Underscore))
            } else if this.eat_keyword(exp!(Underscore)) {
            } else if this.token_uninterpolated_span().at_least_rust_2018() {