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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
import { Vector } from './vector.js';
import { BufferType, Type } from './enum.js';
import { DataType, strideForType } from './type.js';
import { popcnt_bit_range, truncateBitmap } from './util/bit.js';
// When slicing, we do not know the null count of the sliced range without
// doing some computation. To avoid doing this eagerly, we set the null count
// to -1 (any negative number will do). When Vector.nullCount is called the
// first time, the null count will be computed. See ARROW-33
/** @ignore */ export type kUnknownNullCount = -1;
/** @ignore */ export const kUnknownNullCount = -1;
/** @ignore */ export type NullBuffer = Uint8Array | null | undefined;
/** @ignore */ export type TypeIdsBuffer = Int8Array | ArrayLike<number> | Iterable<number> | undefined;
/** @ignore */ export type ValueOffsetsBuffer = Int32Array | ArrayLike<number> | Iterable<number> | undefined;
/** @ignore */ export type DataBuffer<T extends DataType> = T['TArray'] | ArrayLike<number> | Iterable<number> | undefined;
/** @ignore */
export interface Buffers<T extends DataType> {
[BufferType.OFFSET]: Int32Array;
[BufferType.DATA]: T['TArray'];
[BufferType.VALIDITY]: Uint8Array;
[BufferType.TYPE]: T['TArray'];
}
/** @ignore */
export interface Data<T extends DataType = DataType> {
readonly TType: T['TType'];
readonly TArray: T['TArray'];
readonly TValue: T['TValue'];
}
/**
* Data structure underlying {@link Vector}s. Use the convenience method {@link makeData}.
*/
export class Data<T extends DataType = DataType> {
declare public readonly type: T;
declare public readonly length: number;
declare public readonly offset: number;
declare public readonly stride: number;
declare public readonly nullable: boolean;
declare public readonly children: Data[];
/**
* The dictionary for this Vector, if any. Only used for Dictionary type.
*/
declare public dictionary?: Vector;
declare public readonly values: Buffers<T>[BufferType.DATA];
declare public readonly typeIds: Buffers<T>[BufferType.TYPE];
declare public readonly nullBitmap: Buffers<T>[BufferType.VALIDITY];
declare public readonly valueOffsets: Buffers<T>[BufferType.OFFSET];
public get typeId(): T['TType'] { return this.type.typeId; }
public get ArrayType(): T['ArrayType'] { return this.type.ArrayType; }
public get buffers() {
return [this.valueOffsets, this.values, this.nullBitmap, this.typeIds] as Buffers<T>;
}
public get byteLength(): number {
let byteLength = 0;
const { valueOffsets, values, nullBitmap, typeIds } = this;
valueOffsets && (byteLength += valueOffsets.byteLength);
values && (byteLength += values.byteLength);
nullBitmap && (byteLength += nullBitmap.byteLength);
typeIds && (byteLength += typeIds.byteLength);
return this.children.reduce((byteLength, child) => byteLength + child.byteLength, byteLength);
}
protected _nullCount: number | kUnknownNullCount;
public get nullCount() {
let nullCount = this._nullCount;
let nullBitmap: Uint8Array | undefined;
if (nullCount <= kUnknownNullCount && (nullBitmap = this.nullBitmap)) {
this._nullCount = nullCount = this.length - popcnt_bit_range(nullBitmap, this.offset, this.offset + this.length);
}
return nullCount;
}
constructor(type: T, offset: number, length: number, nullCount?: number, buffers?: Partial<Buffers<T>> | Data<T>, children: Data[] = [], dictionary?: Vector) {
this.type = type;
this.children = children;
this.dictionary = dictionary;
this.offset = Math.floor(Math.max(offset || 0, 0));
this.length = Math.floor(Math.max(length || 0, 0));
this._nullCount = Math.floor(Math.max(nullCount || 0, -1));
let buffer: Buffers<T>[keyof Buffers<T>];
if (buffers instanceof Data) {
this.stride = buffers.stride;
this.values = buffers.values;
this.typeIds = buffers.typeIds;
this.nullBitmap = buffers.nullBitmap;
this.valueOffsets = buffers.valueOffsets;
} else {
this.stride = strideForType(type);
if (buffers) {
(buffer = (buffers as Buffers<T>)[0]) && (this.valueOffsets = buffer);
(buffer = (buffers as Buffers<T>)[1]) && (this.values = buffer);
(buffer = (buffers as Buffers<T>)[2]) && (this.nullBitmap = buffer);
(buffer = (buffers as Buffers<T>)[3]) && (this.typeIds = buffer);
}
}
this.nullable = this._nullCount !== 0 && this.nullBitmap && this.nullBitmap.byteLength > 0;
}
public getValid(index: number) {
if (this.nullable && this.nullCount > 0) {
const pos = this.offset + index;
const val = this.nullBitmap[pos >> 3];
return (val & (1 << (pos % 8))) !== 0;
}
return true;
}
public setValid(index: number, value: boolean) {
// Don't interact w/ nullBitmap if not nullable
if (!this.nullable) { return value; }
// If no null bitmap, initialize one on the fly
if (!this.nullBitmap || this.nullBitmap.byteLength <= (index >> 3)) {
const { nullBitmap } = this._changeLengthAndBackfillNullBitmap(this.length);
Object.assign(this, { nullBitmap, _nullCount: 0 });
}
const { nullBitmap, offset } = this;
const pos = (offset + index) >> 3;
const bit = (offset + index) % 8;
const val = (nullBitmap[pos] >> bit) & 1;
// If `val` is truthy and the current bit is 0, flip it to 1 and increment `_nullCount`.
// If `val` is falsey and the current bit is 1, flip it to 0 and decrement `_nullCount`.
value ? val === 0 && ((nullBitmap[pos] |= (1 << bit)), (this._nullCount = this.nullCount + 1))
: val === 1 && ((nullBitmap[pos] &= ~(1 << bit)), (this._nullCount = this.nullCount - 1));
return value;
}
public clone<R extends DataType = T>(type: R = this.type as any, offset = this.offset, length = this.length, nullCount = this._nullCount, buffers: Buffers<R> = <any>this, children: Data[] = this.children) {
return new Data(type, offset, length, nullCount, buffers, children, this.dictionary);
}
public slice(offset: number, length: number): Data<T> {
const { stride, typeId, children } = this;
// +true === 1, +false === 0, so this means
// we keep nullCount at 0 if it's already 0,
// otherwise set to the invalidated flag -1
const nullCount = +(this._nullCount === 0) - 1;
const childStride = typeId === 16 /* FixedSizeList */ ? stride : 1;
const buffers = this._sliceBuffers(offset, length, stride, typeId);
return this.clone<T>(this.type, this.offset + offset, length, nullCount, buffers,
// Don't slice children if we have value offsets (the variable-width types)
(children.length === 0 || this.valueOffsets) ? children : this._sliceChildren(children, childStride * offset, childStride * length));
}
public _changeLengthAndBackfillNullBitmap(newLength: number): Data<T> {
if (this.typeId === Type.Null) {
return this.clone(this.type, 0, newLength, 0);
}
const { length, nullCount } = this;
// start initialized with 0s (nulls), then fill from 0 to length with 1s (not null)
const bitmap = new Uint8Array(((newLength + 63) & ~63) >> 3).fill(255, 0, length >> 3);
// set all the bits in the last byte (up to bit `length - length % 8`) to 1 (not null)
bitmap[length >> 3] = (1 << (length - (length & ~7))) - 1;
// if we have a nullBitmap, truncate + slice and set it over the pre-filled 1s
if (nullCount > 0) {
bitmap.set(truncateBitmap(this.offset, length, this.nullBitmap), 0);
}
const buffers = this.buffers;
buffers[BufferType.VALIDITY] = bitmap;
return this.clone(this.type, 0, newLength, nullCount + (newLength - length), buffers);
}
protected _sliceBuffers(offset: number, length: number, stride: number, typeId: T['TType']): Buffers<T> {
let arr: any;
const { buffers } = this;
// If typeIds exist, slice the typeIds buffer
(arr = buffers[BufferType.TYPE]) && (buffers[BufferType.TYPE] = arr.subarray(offset, offset + length));
// If offsets exist, only slice the offsets buffer
(arr = buffers[BufferType.OFFSET]) && (buffers[BufferType.OFFSET] = arr.subarray(offset, offset + length + 1)) ||
// Otherwise if no offsets, slice the data buffer. Don't slice the data vector for Booleans, since the offset goes by bits not bytes
(arr = buffers[BufferType.DATA]) && (buffers[BufferType.DATA] = typeId === 6 ? arr : arr.subarray(stride * offset, stride * (offset + length)));
return buffers;
}
protected _sliceChildren(children: Data[], offset: number, length: number): Data[] {
return children.map((child) => child.slice(offset, length));
}
}
(Data.prototype as any).children = Object.freeze([]);
import {
Dictionary,
Bool, Null, Utf8, Binary, Decimal, FixedSizeBinary, List, FixedSizeList, Map_, Struct,
Float,
Int,
Date_,
Interval,
Time,
Timestamp,
Union, DenseUnion, SparseUnion,
} from './type.js';
import { Visitor } from './visitor.js';
import { toArrayBufferView, toInt32Array, toUint8Array } from './util/buffer.js';
class MakeDataVisitor extends Visitor {
public visit<T extends DataType>(props: any): Data<T> {
return this.getVisitFn(props['type']).call(this, props);
}
public visitNull<T extends Null>(props: NullDataProps<T>) {
const {
['type']: type,
['offset']: offset = 0,
['length']: length = 0,
} = props;
return new Data(type, offset, length, 0);
}
public visitBool<T extends Bool>(props: BoolDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length >> 3, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitInt<T extends Int>(props: IntDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitFloat<T extends Float>(props: FloatDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitUtf8<T extends Utf8>(props: Utf8DataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const data = toUint8Array(props['data']);
const nullBitmap = toUint8Array(props['nullBitmap']);
const valueOffsets = toInt32Array(props['valueOffsets']);
const { ['length']: length = valueOffsets.length - 1, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0 } = props;
return new Data(type, offset, length, nullCount, [valueOffsets, data, nullBitmap]);
}
public visitBinary<T extends Binary>(props: BinaryDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const data = toUint8Array(props['data']);
const nullBitmap = toUint8Array(props['nullBitmap']);
const valueOffsets = toInt32Array(props['valueOffsets']);
const { ['length']: length = valueOffsets.length - 1, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0 } = props;
return new Data(type, offset, length, nullCount, [valueOffsets, data, nullBitmap]);
}
public visitFixedSizeBinary<T extends FixedSizeBinary>(props: FixedSizeBinaryDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitDate<T extends Date_>(props: Date_DataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitTimestamp<T extends Timestamp>(props: TimestampDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitTime<T extends Time>(props: TimeDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitDecimal<T extends Decimal>(props: DecimalDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitList<T extends List>(props: ListDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0, ['child']: child } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const valueOffsets = toInt32Array(props['valueOffsets']);
const { ['length']: length = valueOffsets.length - 1, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0 } = props;
return new Data(type, offset, length, nullCount, [valueOffsets, undefined, nullBitmap], [child]);
}
public visitStruct<T extends Struct>(props: StructDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0, ['children']: children = [] } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const {
length = children.reduce((len, { length }) => Math.max(len, length), 0),
nullCount = props['nullBitmap'] ? -1 : 0
} = props;
return new Data(type, offset, length, nullCount, [undefined, undefined, nullBitmap], children);
}
public visitUnion<T extends Union>(props: UnionDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0, ['children']: children = [] } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const typeIds = toArrayBufferView(type.ArrayType, props['typeIds']);
const { ['length']: length = typeIds.length, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
if (DataType.isSparseUnion(type)) {
return new Data(type, offset, length, nullCount, [undefined, undefined, nullBitmap, typeIds], children);
}
const valueOffsets = toInt32Array(props['valueOffsets']);
return new Data(type, offset, length, nullCount, [valueOffsets, undefined, nullBitmap, typeIds], children);
}
public visitDictionary<T extends Dictionary>(props: DictionaryDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.indices.ArrayType, props['data']);
const { ['dictionary']: dictionary = new Vector([new MakeDataVisitor().visit({ type: type.dictionary })]) } = props;
const { ['length']: length = data.length, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0 } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap], [], dictionary);
}
public visitInterval<T extends Interval>(props: IntervalDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0 } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const data = toArrayBufferView(type.ArrayType, props['data']);
const { ['length']: length = data.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [undefined, data, nullBitmap]);
}
public visitFixedSizeList<T extends FixedSizeList>(props: FixedSizeListDataProps<T>) {
const { ['type']: type, ['offset']: offset = 0, ['child']: child = new MakeDataVisitor().visit({ type: type.valueType }) } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const { ['length']: length = child.length / strideForType(type), ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0 } = props;
return new Data(type, offset, length, nullCount, [undefined, undefined, nullBitmap], [child]);
}
public visitMap<T extends Map_>(props: Map_DataProps<T>) {
const { ['type']: type, ['offset']: offset = 0, ['child']: child = new MakeDataVisitor().visit({ type: type.childType }) } = props;
const nullBitmap = toUint8Array(props['nullBitmap']);
const valueOffsets = toInt32Array(props['valueOffsets']);
const { ['length']: length = valueOffsets.length - 1, ['nullCount']: nullCount = props['nullBitmap'] ? -1 : 0, } = props;
return new Data(type, offset, length, nullCount, [valueOffsets, undefined, nullBitmap], [child]);
}
}
/** @ignore */
interface DataProps_<T extends DataType> {
type: T;
offset?: number;
length?: number;
nullCount?: number;
nullBitmap?: NullBuffer;
}
interface NullDataProps<T extends Null> { type: T; offset?: number; length?: number }
interface IntDataProps<T extends Int> extends DataProps_<T> { data?: DataBuffer<T> }
interface DictionaryDataProps<T extends Dictionary> extends DataProps_<T> { data?: DataBuffer<T>; dictionary?: Vector<T['dictionary']> }
interface FloatDataProps<T extends Float> extends DataProps_<T> { data?: DataBuffer<T> }
interface BoolDataProps<T extends Bool> extends DataProps_<T> { data?: DataBuffer<T> }
interface DecimalDataProps<T extends Decimal> extends DataProps_<T> { data?: DataBuffer<T> }
interface Date_DataProps<T extends Date_> extends DataProps_<T> { data?: DataBuffer<T> }
interface TimeDataProps<T extends Time> extends DataProps_<T> { data?: DataBuffer<T> }
interface TimestampDataProps<T extends Timestamp> extends DataProps_<T> { data?: DataBuffer<T> }
interface IntervalDataProps<T extends Interval> extends DataProps_<T> { data?: DataBuffer<T> }
interface FixedSizeBinaryDataProps<T extends FixedSizeBinary> extends DataProps_<T> { data?: DataBuffer<T> }
interface BinaryDataProps<T extends Binary> extends DataProps_<T> { valueOffsets: ValueOffsetsBuffer; data?: DataBuffer<T> }
interface Utf8DataProps<T extends Utf8> extends DataProps_<T> { valueOffsets: ValueOffsetsBuffer; data?: DataBuffer<T> }
interface ListDataProps<T extends List> extends DataProps_<T> { valueOffsets: ValueOffsetsBuffer; child: Data<T['valueType']> }
interface FixedSizeListDataProps<T extends FixedSizeList> extends DataProps_<T> { child: Data<T['valueType']> }
interface StructDataProps<T extends Struct> extends DataProps_<T> { children: Data[] }
interface Map_DataProps<T extends Map_> extends DataProps_<T> { valueOffsets: ValueOffsetsBuffer; child: Data }
interface SparseUnionDataProps<T extends SparseUnion> extends DataProps_<T> { typeIds: TypeIdsBuffer; children: Data[] }
interface DenseUnionDataProps<T extends DenseUnion> extends DataProps_<T> { typeIds: TypeIdsBuffer; children: Data[]; valueOffsets: ValueOffsetsBuffer }
interface UnionDataProps<T extends Union> extends DataProps_<T> { typeIds: TypeIdsBuffer; children: Data[]; valueOffsets?: ValueOffsetsBuffer }
export type DataProps<T extends DataType> = (
T extends Null /* */ ? NullDataProps<T> :
T extends Int /* */ ? IntDataProps<T> :
T extends Dictionary /* */ ? DictionaryDataProps<T> :
T extends Float /* */ ? FloatDataProps<T> :
T extends Bool /* */ ? BoolDataProps<T> :
T extends Decimal /* */ ? DecimalDataProps<T> :
T extends Date_ /* */ ? Date_DataProps<T> :
T extends Time /* */ ? TimeDataProps<T> :
T extends Timestamp /* */ ? TimestampDataProps<T> :
T extends Interval /* */ ? IntervalDataProps<T> :
T extends FixedSizeBinary /* */ ? FixedSizeBinaryDataProps<T> :
T extends Binary /* */ ? BinaryDataProps<T> :
T extends Utf8 /* */ ? Utf8DataProps<T> :
T extends List /* */ ? ListDataProps<T> :
T extends FixedSizeList /* */ ? FixedSizeListDataProps<T> :
T extends Struct /* */ ? StructDataProps<T> :
T extends Map_ /* */ ? Map_DataProps<T> :
T extends SparseUnion /* */ ? SparseUnionDataProps<T> :
T extends DenseUnion /* */ ? DenseUnionDataProps<T> :
T extends Union /* */ ? UnionDataProps<T> :
/* */ DataProps_<T>
);
export function makeData<T extends Null>(props: NullDataProps<T>): Data<T>;
export function makeData<T extends Int>(props: IntDataProps<T>): Data<T>;
export function makeData<T extends Dictionary>(props: DictionaryDataProps<T>): Data<T>;
export function makeData<T extends Float>(props: FloatDataProps<T>): Data<T>;
export function makeData<T extends Bool>(props: BoolDataProps<T>): Data<T>;
export function makeData<T extends Decimal>(props: DecimalDataProps<T>): Data<T>;
export function makeData<T extends Date_>(props: Date_DataProps<T>): Data<T>;
export function makeData<T extends Time>(props: TimeDataProps<T>): Data<T>;
export function makeData<T extends Timestamp>(props: TimestampDataProps<T>): Data<T>;
export function makeData<T extends Interval>(props: IntervalDataProps<T>): Data<T>;
export function makeData<T extends FixedSizeBinary>(props: FixedSizeBinaryDataProps<T>): Data<T>;
export function makeData<T extends Binary>(props: BinaryDataProps<T>): Data<T>;
export function makeData<T extends Utf8>(props: Utf8DataProps<T>): Data<T>;
export function makeData<T extends List>(props: ListDataProps<T>): Data<T>;
export function makeData<T extends FixedSizeList>(props: FixedSizeListDataProps<T>): Data<T>;
export function makeData<T extends Struct>(props: StructDataProps<T>): Data<T>;
export function makeData<T extends Map_>(props: Map_DataProps<T>): Data<T>;
export function makeData<T extends SparseUnion>(props: SparseUnionDataProps<T>): Data<T>;
export function makeData<T extends DenseUnion>(props: DenseUnionDataProps<T>): Data<T>;
export function makeData<T extends Union>(props: UnionDataProps<T>): Data<T>;
export function makeData<T extends DataType>(props: DataProps_<T>): Data<T>;
export function makeData(props: any) {
return new MakeDataVisitor().visit(props);
}