{"ast_node_type":"variable","tokens":[{"end":91,"kind":"keyword","start":0,"text":"let"}]}
                                let hi = hi.map(Quad::from_bits).unwrap_or(Quad::INFINITY);
                                let lo = lo.map(Quad::from_bits).unwrap_or(-Quad::INFINITY);
                                F128Range(lo, hi, end)