{"ast_node_type":"variable","tokens":[{"end":94,"kind":"keyword","start":0,"text":"let"}]}
            let (mask_lane_count, mask_lane_ty) = mask.layout().ty.simd_size_and_type(fx.tcx);
            let (index_lane_count, index_lane_ty) = index.layout().ty.simd_size_and_type(fx.tcx);
            let (ret_lane_count, ret_lane_ty) = ret.layout().ty.simd_size_and_type(fx.tcx);