{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"cx.tcx.get_diagnostic_name(def_id),"}]}
                    cx.tcx.get_diagnostic_name(def_id),
                matches!(
                    Some(sym::f16_nan | sym::f32_nan | sym::f64_nan | sym::f128_nan)