{"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"fx.bcx.ins().iconcat(lsb,"}]}
                    fx.bcx.ins().iconcat(lsb, msb)
                    let msb = fx.bcx.ins().iconst(types::I64, (discr_val >> 64) as u64 as i64);
                }