{"ast_node_type":"variable","tokens":[{"end":55,"kind":"keyword","start":0,"text":"let"}]}
            let elem_ty = bx.cx.type_float_from_ty(*f);
        let (elem_ty_str, elem_ty, cast_type) = if let ty::Float(ref f) = *in_elem.kind() {
            match f.bit_width() {