util.d.ts

/**
 * The `util` module supports the needs of Node.js internal APIs. Many of the
 * utilities are useful for application and module developers as well. To access
 * it:
 *
 * ```js
 * const util = require('util');
 * ```
 * @see [source](https://github.com/nodejs/node/blob/v16.9.0/lib/util.js)
 */
declare module 'util' {
    import * as types from 'node:util/types';
    export interface InspectOptions {
        /**
         * If set to `true`, getters are going to be
         * inspected as well. If set to `'get'` only getters without setter are going
         * to be inspected. If set to `'set'` only getters having a corresponding
         * setter are going to be inspected. This might cause side effects depending on
         * the getter function.
         * @default `false`
         */
        getters?: 'get' | 'set' | boolean | undefined;
        showHidden?: boolean | undefined;
        /**
         * @default 2
         */
        depth?: number | null | undefined;
        colors?: boolean | undefined;
        customInspect?: boolean | undefined;
        showProxy?: boolean | undefined;
        maxArrayLength?: number | null | undefined;
        /**
         * Specifies the maximum number of characters to
         * include when formatting. Set to `null` or `Infinity` to show all elements.
         * Set to `0` or negative to show no characters.
         * @default 10000
         */
        maxStringLength?: number | null | undefined;
        breakLength?: number | undefined;
        /**
         * Setting this to `false` causes each object key
         * to be displayed on a new line. It will also add new lines to text that is
         * longer than `breakLength`. If set to a number, the most `n` inner elements
         * are united on a single line as long as all properties fit into
         * `breakLength`. Short array elements are also grouped together. Note that no
         * text will be reduced below 16 characters, no matter the `breakLength` size.
         * For more information, see the example below.
         * @default `true`
         */
        compact?: boolean | number | undefined;
        sorted?: boolean | ((a: string, b: string) => number) | undefined;
    }
    export type Style = 'special' | 'number' | 'bigint' | 'boolean' | 'undefined' | 'null' | 'string' | 'symbol' | 'date' | 'regexp' | 'module';
    export type CustomInspectFunction = (depth: number, options: InspectOptionsStylized) => string;
    export interface InspectOptionsStylized extends InspectOptions {
        stylize(text: string, styleType: Style): string;
    }
    /**
     * The `util.format()` method returns a formatted string using the first argument
     * as a `printf`\-like format string which can contain zero or more format
     * specifiers. Each specifier is replaced with the converted value from the
     * corresponding argument. Supported specifiers are:
     *
     * If a specifier does not have a corresponding argument, it is not replaced:
     *
     * ```js
     * util.format('%s:%s', 'foo');
     * // Returns: 'foo:%s'
     * ```
     *
     * Values that are not part of the format string are formatted using`util.inspect()` if their type is not `string`.
     *
     * If there are more arguments passed to the `util.format()` method than the
     * number of specifiers, the extra arguments are concatenated to the returned
     * string, separated by spaces:
     *
     * ```js
     * util.format('%s:%s', 'foo', 'bar', 'baz');
     * // Returns: 'foo:bar baz'
     * ```
     *
     * If the first argument does not contain a valid format specifier, `util.format()`returns a string that is the concatenation of all arguments separated by spaces:
     *
     * ```js
     * util.format(1, 2, 3);
     * // Returns: '1 2 3'
     * ```
     *
     * If only one argument is passed to `util.format()`, it is returned as it is
     * without any formatting:
     *
     * ```js
     * util.format('%% %s');
     * // Returns: '%% %s'
     * ```
     *
     * `util.format()` is a synchronous method that is intended as a debugging tool.
     * Some input values can have a significant performance overhead that can block the
     * event loop. Use this function with care and never in a hot code path.
     * @since v0.5.3
     * @param format A `printf`-like format string.
     */
    export function format(format?: any, ...param: any[]): string;
    /**
     * This function is identical to {@link format}, except in that it takes
     * an `inspectOptions` argument which specifies options that are passed along to {@link inspect}.
     *
     * ```js
     * util.formatWithOptions({ colors: true }, 'See object %O', { foo: 42 });
     * // Returns 'See object { foo: 42 }', where `42` is colored as a number
     * // when printed to a terminal.
     * ```
     * @since v10.0.0
     */
    export function formatWithOptions(inspectOptions: InspectOptions, format?: any, ...param: any[]): string;
    /**
     * Returns the string name for a numeric error code that comes from a Node.js API.
     * The mapping between error codes and error names is platform-dependent.
     * See `Common System Errors` for the names of common errors.
     *
     * ```js
     * fs.access('file/that/does/not/exist', (err) => {
     *   const name = util.getSystemErrorName(err.errno);
     *   console.error(name);  // ENOENT
     * });
     * ```
     * @since v9.7.0
     */
    export function getSystemErrorName(err: number): string;
    /**
     * Returns a Map of all system error codes available from the Node.js API.
     * The mapping between error codes and error names is platform-dependent.
     * See `Common System Errors` for the names of common errors.
     *
     * ```js
     * fs.access('file/that/does/not/exist', (err) => {
     *   const errorMap = util.getSystemErrorMap();
     *   const name = errorMap.get(err.errno);
     *   console.error(name);  // ENOENT
     * });
     * ```
     * @since v16.0.0
     */
    export function getSystemErrorMap(): Map<number, [string, string]>;
    /**
     * The `util.log()` method prints the given `string` to `stdout` with an included
     * timestamp.
     *
     * ```js
     * const util = require('util');
     *
     * util.log('Timestamped message.');
     * ```
     * @since v0.3.0
     * @deprecated Since v6.0.0 - Use a third party module instead.
     */
    export function log(string: string): void;
    /**
     * Returns the `string` after replacing any surrogate code points
     * (or equivalently, any unpaired surrogate code units) with the
     * Unicode "replacement character" U+FFFD.
     * @since v16.8.0
     */
    export function toUSVString(string: string): string;
    /**
     * The `util.inspect()` method returns a string representation of `object` that is
     * intended for debugging. The output of `util.inspect` may change at any time
     * and should not be depended upon programmatically. Additional `options` may be
     * passed that alter the result.`util.inspect()` will use the constructor's name and/or `@@toStringTag` to make
     * an identifiable tag for an inspected value.
     *
     * ```js
     * class Foo {
     *   get [Symbol.toStringTag]() {
     *     return 'bar';
     *   }
     * }
     *
     * class Bar {}
     *
     * const baz = Object.create(null, { [Symbol.toStringTag]: { value: 'foo' } });
     *
     * util.inspect(new Foo()); // 'Foo [bar] {}'
     * util.inspect(new Bar()); // 'Bar {}'
     * util.inspect(baz);       // '[foo] {}'
     * ```
     *
     * Circular references point to their anchor by using a reference index:
     *
     * ```js
     * const { inspect } = require('util');
     *
     * const obj = {};
     * obj.a = [obj];
     * obj.b = {};
     * obj.b.inner = obj.b;
     * obj.b.obj = obj;
     *
     * console.log(inspect(obj));
     * // <ref *1> {
     * //   a: [ [Circular *1] ],
     * //   b: <ref *2> { inner: [Circular *2], obj: [Circular *1] }
     * // }
     * ```
     *
     * The following example inspects all properties of the `util` object:
     *
     * ```js
     * const util = require('util');
     *
     * console.log(util.inspect(util, { showHidden: true, depth: null }));
     * ```
     *
     * The following example highlights the effect of the `compact` option:
     *
     * ```js
     * const util = require('util');
     *
     * const o = {
     *   a: [1, 2, [[
     *     'Lorem ipsum dolor sit amet,\nconsectetur adipiscing elit, sed do ' +
     *       'eiusmod \ntempor incididunt ut labore et dolore magna aliqua.',
     *     'test',
     *     'foo']], 4],
     *   b: new Map([['za', 1], ['zb', 'test']])
     * };
     * console.log(util.inspect(o, { compact: true, depth: 5, breakLength: 80 }));
     *
     * // { a:
     * //   [ 1,
     * //     2,
     * //     [ [ 'Lorem ipsum dolor sit amet,\nconsectetur [...]', // A long line
     * //           'test',
     * //           'foo' ] ],
     * //     4 ],
     * //   b: Map(2) { 'za' => 1, 'zb' => 'test' } }
     *
     * // Setting `compact` to false or an integer creates more reader friendly output.
     * console.log(util.inspect(o, { compact: false, depth: 5, breakLength: 80 }));
     *
     * // {
     * //   a: [
     * //     1,
     * //     2,
     * //     [
     * //       [
     * //         'Lorem ipsum dolor sit amet,\n' +
     * //           'consectetur adipiscing elit, sed do eiusmod \n' +
     * //           'tempor incididunt ut labore et dolore magna aliqua.',
     * //         'test',
     * //         'foo'
     * //       ]
     * //     ],
     * //     4
     * //   ],
     * //   b: Map(2) {
     * //     'za' => 1,
     * //     'zb' => 'test'
     * //   }
     * // }
     *
     * // Setting `breakLength` to e.g. 150 will print the "Lorem ipsum" text in a
     * // single line.
     * ```
     *
     * The `showHidden` option allows [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) and
     * [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) entries to be
     * inspected. If there are more entries than `maxArrayLength`, there is no
     * guarantee which entries are displayed. That means retrieving the same [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) entries twice may
     * result in different output. Furthermore, entries
     * with no remaining strong references may be garbage collected at any time.
     *
     * ```js
     * const { inspect } = require('util');
     *
     * const obj = { a: 1 };
     * const obj2 = { b: 2 };
     * const weakSet = new WeakSet([obj, obj2]);
     *
     * console.log(inspect(weakSet, { showHidden: true }));
     * // WeakSet { { a: 1 }, { b: 2 } }
     * ```
     *
     * The `sorted` option ensures that an object's property insertion order does not
     * impact the result of `util.inspect()`.
     *
     * ```js
     * const { inspect } = require('util');
     * const assert = require('assert');
     *
     * const o1 = {
     *   b: [2, 3, 1],
     *   a: '`a` comes before `b`',
     *   c: new Set([2, 3, 1])
     * };
     * console.log(inspect(o1, { sorted: true }));
     * // { a: '`a` comes before `b`', b: [ 2, 3, 1 ], c: Set(3) { 1, 2, 3 } }
     * console.log(inspect(o1, { sorted: (a, b) => b.localeCompare(a) }));
     * // { c: Set(3) { 3, 2, 1 }, b: [ 2, 3, 1 ], a: '`a` comes before `b`' }
     *
     * const o2 = {
     *   c: new Set([2, 1, 3]),
     *   a: '`a` comes before `b`',
     *   b: [2, 3, 1]
     * };
     * assert.strict.equal(
     *   inspect(o1, { sorted: true }),
     *   inspect(o2, { sorted: true })
     * );
     * ```
     *
     * `util.inspect()` is a synchronous method intended for debugging. Its maximum
     * output length is approximately 128 MB. Inputs that result in longer output will
     * be truncated.
     * @since v0.3.0
     * @param object Any JavaScript primitive or `Object`.
     * @return The representation of `object`.
     */
    export function inspect(object: any, showHidden?: boolean, depth?: number | null, color?: boolean): string;
    export function inspect(object: any, options: InspectOptions): string;
    export namespace inspect {
        let colors: NodeJS.Dict<[number, number]>;
        let styles: {
            [K in Style]: string;
        };
        let defaultOptions: InspectOptions;
        /**
         * Allows changing inspect settings from the repl.
         */
        let replDefaults: InspectOptions;
        /**
         * That can be used to declare custom inspect functions.
         */
        const custom: unique symbol;
    }
    /**
     * Alias for [`Array.isArray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray).
     *
     * Returns `true` if the given `object` is an `Array`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isArray([]);
     * // Returns: true
     * util.isArray(new Array());
     * // Returns: true
     * util.isArray({});
     * // Returns: false
     * ```
     * @since v0.6.0
     * @deprecated Since v4.0.0 - Use `isArray` instead.
     */
    export function isArray(object: unknown): object is unknown[];
    /**
     * Returns `true` if the given `object` is a `RegExp`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isRegExp(/some regexp/);
     * // Returns: true
     * util.isRegExp(new RegExp('another regexp'));
     * // Returns: true
     * util.isRegExp({});
     * // Returns: false
     * ```
     * @since v0.6.0
     * @deprecated Since v4.0.0 - Deprecated
     */
    export function isRegExp(object: unknown): object is RegExp;
    /**
     * Returns `true` if the given `object` is a `Date`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isDate(new Date());
     * // Returns: true
     * util.isDate(Date());
     * // false (without 'new' returns a String)
     * util.isDate({});
     * // Returns: false
     * ```
     * @since v0.6.0
     * @deprecated Since v4.0.0 - Use {@link types.isDate} instead.
     */
    export function isDate(object: unknown): object is Date;
    /**
     * Returns `true` if the given `object` is an `Error`. Otherwise, returns`false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isError(new Error());
     * // Returns: true
     * util.isError(new TypeError());
     * // Returns: true
     * util.isError({ name: 'Error', message: 'an error occurred' });
     * // Returns: false
     * ```
     *
     * This method relies on `Object.prototype.toString()` behavior. It is
     * possible to obtain an incorrect result when the `object` argument manipulates`@@toStringTag`.
     *
     * ```js
     * const util = require('util');
     * const obj = { name: 'Error', message: 'an error occurred' };
     *
     * util.isError(obj);
     * // Returns: false
     * obj[Symbol.toStringTag] = 'Error';
     * util.isError(obj);
     * // Returns: true
     * ```
     * @since v0.6.0
     * @deprecated Since v4.0.0 - Use {@link types.isNativeError} instead.
     */
    export function isError(object: unknown): object is Error;
    /**
     * Usage of `util.inherits()` is discouraged. Please use the ES6 `class` and`extends` keywords to get language level inheritance support. Also note
     * that the two styles are [semantically incompatible](https://github.com/nodejs/node/issues/4179).
     *
     * Inherit the prototype methods from one [constructor](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor) into another. The
     * prototype of `constructor` will be set to a new object created from`superConstructor`.
     *
     * This mainly adds some input validation on top of`Object.setPrototypeOf(constructor.prototype, superConstructor.prototype)`.
     * As an additional convenience, `superConstructor` will be accessible
     * through the `constructor.super_` property.
     *
     * ```js
     * const util = require('util');
     * const EventEmitter = require('events');
     *
     * function MyStream() {
     *   EventEmitter.call(this);
     * }
     *
     * util.inherits(MyStream, EventEmitter);
     *
     * MyStream.prototype.write = function(data) {
     *   this.emit('data', data);
     * };
     *
     * const stream = new MyStream();
     *
     * console.log(stream instanceof EventEmitter); // true
     * console.log(MyStream.super_ === EventEmitter); // true
     *
     * stream.on('data', (data) => {
     *   console.log(`Received data: "${data}"`);
     * });
     * stream.write('It works!'); // Received data: "It works!"
     * ```
     *
     * ES6 example using `class` and `extends`:
     *
     * ```js
     * const EventEmitter = require('events');
     *
     * class MyStream extends EventEmitter {
     *   write(data) {
     *     this.emit('data', data);
     *   }
     * }
     *
     * const stream = new MyStream();
     *
     * stream.on('data', (data) => {
     *   console.log(`Received data: "${data}"`);
     * });
     * stream.write('With ES6');
     * ```
     * @since v0.3.0
     * @deprecated Legacy: Use ES2015 class syntax and `extends` keyword instead.
     */
    export function inherits(constructor: unknown, superConstructor: unknown): void;
    export type DebugLoggerFunction = (msg: string, ...param: unknown[]) => void;
    export interface DebugLogger extends DebugLoggerFunction {
        enabled: boolean;
    }
    /**
     * The `util.debuglog()` method is used to create a function that conditionally
     * writes debug messages to `stderr` based on the existence of the `NODE_DEBUG`environment variable. If the `section` name appears within the value of that
     * environment variable, then the returned function operates similar to `console.error()`. If not, then the returned function is a no-op.
     *
     * ```js
     * const util = require('util');
     * const debuglog = util.debuglog('foo');
     *
     * debuglog('hello from foo [%d]', 123);
     * ```
     *
     * If this program is run with `NODE_DEBUG=foo` in the environment, then
     * it will output something like:
     *
     * ```console
     * FOO 3245: hello from foo [123]
     * ```
     *
     * where `3245` is the process id. If it is not run with that
     * environment variable set, then it will not print anything.
     *
     * The `section` supports wildcard also:
     *
     * ```js
     * const util = require('util');
     * const debuglog = util.debuglog('foo-bar');
     *
     * debuglog('hi there, it\'s foo-bar [%d]', 2333);
     * ```
     *
     * if it is run with `NODE_DEBUG=foo*` in the environment, then it will output
     * something like:
     *
     * ```console
     * FOO-BAR 3257: hi there, it's foo-bar [2333]
     * ```
     *
     * Multiple comma-separated `section` names may be specified in the `NODE_DEBUG`environment variable: `NODE_DEBUG=fs,net,tls`.
     *
     * The optional `callback` argument can be used to replace the logging function
     * with a different function that doesn't have any initialization or
     * unnecessary wrapping.
     *
     * ```js
     * const util = require('util');
     * let debuglog = util.debuglog('internals', (debug) => {
     *   // Replace with a logging function that optimizes out
     *   // testing if the section is enabled
     *   debuglog = debug;
     * });
     * ```
     * @since v0.11.3
     * @param section A string identifying the portion of the application for which the `debuglog` function is being created.
     * @param callback A callback invoked the first time the logging function is called with a function argument that is a more optimized logging function.
     * @return The logging function
     */
    export function debuglog(section: string, callback?: (fn: DebugLoggerFunction) => void): DebugLogger;
    export const debug: typeof debuglog;
    /**
     * Returns `true` if the given `object` is a `Boolean`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isBoolean(1);
     * // Returns: false
     * util.isBoolean(0);
     * // Returns: false
     * util.isBoolean(false);
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `typeof value === 'boolean'` instead.
     */
    export function isBoolean(object: unknown): object is boolean;
    /**
     * Returns `true` if the given `object` is a `Buffer`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isBuffer({ length: 0 });
     * // Returns: false
     * util.isBuffer([]);
     * // Returns: false
     * util.isBuffer(Buffer.from('hello world'));
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `isBuffer` instead.
     */
    export function isBuffer(object: unknown): object is Buffer;
    /**
     * Returns `true` if the given `object` is a `Function`. Otherwise, returns`false`.
     *
     * ```js
     * const util = require('util');
     *
     * function Foo() {}
     * const Bar = () => {};
     *
     * util.isFunction({});
     * // Returns: false
     * util.isFunction(Foo);
     * // Returns: true
     * util.isFunction(Bar);
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `typeof value === 'function'` instead.
     */
    export function isFunction(object: unknown): boolean;
    /**
     * Returns `true` if the given `object` is strictly `null`. Otherwise, returns`false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isNull(0);
     * // Returns: false
     * util.isNull(undefined);
     * // Returns: false
     * util.isNull(null);
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `value === null` instead.
     */
    export function isNull(object: unknown): object is null;
    /**
     * Returns `true` if the given `object` is `null` or `undefined`. Otherwise,
     * returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isNullOrUndefined(0);
     * // Returns: false
     * util.isNullOrUndefined(undefined);
     * // Returns: true
     * util.isNullOrUndefined(null);
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `value === undefined || value === null` instead.
     */
    export function isNullOrUndefined(object: unknown): object is null | undefined;
    /**
     * Returns `true` if the given `object` is a `Number`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isNumber(false);
     * // Returns: false
     * util.isNumber(Infinity);
     * // Returns: true
     * util.isNumber(0);
     * // Returns: true
     * util.isNumber(NaN);
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `typeof value === 'number'` instead.
     */
    export function isNumber(object: unknown): object is number;
    /**
     * Returns `true` if the given `object` is strictly an `Object`**and** not a`Function` (even though functions are objects in JavaScript).
     * Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isObject(5);
     * // Returns: false
     * util.isObject(null);
     * // Returns: false
     * util.isObject({});
     * // Returns: true
     * util.isObject(() => {});
     * // Returns: false
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Deprecated: Use `value !== null && typeof value === 'object'` instead.
     */
    export function isObject(object: unknown): boolean;
    /**
     * Returns `true` if the given `object` is a primitive type. Otherwise, returns`false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isPrimitive(5);
     * // Returns: true
     * util.isPrimitive('foo');
     * // Returns: true
     * util.isPrimitive(false);
     * // Returns: true
     * util.isPrimitive(null);
     * // Returns: true
     * util.isPrimitive(undefined);
     * // Returns: true
     * util.isPrimitive({});
     * // Returns: false
     * util.isPrimitive(() => {});
     * // Returns: false
     * util.isPrimitive(/^$/);
     * // Returns: false
     * util.isPrimitive(new Date());
     * // Returns: false
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `(typeof value !== 'object' && typeof value !== 'function') || value === null` instead.
     */
    export function isPrimitive(object: unknown): boolean;
    /**
     * Returns `true` if the given `object` is a `string`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isString('');
     * // Returns: true
     * util.isString('foo');
     * // Returns: true
     * util.isString(String('foo'));
     * // Returns: true
     * util.isString(5);
     * // Returns: false
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `typeof value === 'string'` instead.
     */
    export function isString(object: unknown): object is string;
    /**
     * Returns `true` if the given `object` is a `Symbol`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * util.isSymbol(5);
     * // Returns: false
     * util.isSymbol('foo');
     * // Returns: false
     * util.isSymbol(Symbol('foo'));
     * // Returns: true
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `typeof value === 'symbol'` instead.
     */
    export function isSymbol(object: unknown): object is symbol;
    /**
     * Returns `true` if the given `object` is `undefined`. Otherwise, returns `false`.
     *
     * ```js
     * const util = require('util');
     *
     * const foo = undefined;
     * util.isUndefined(5);
     * // Returns: false
     * util.isUndefined(foo);
     * // Returns: true
     * util.isUndefined(null);
     * // Returns: false
     * ```
     * @since v0.11.5
     * @deprecated Since v4.0.0 - Use `value === undefined` instead.
     */
    export function isUndefined(object: unknown): object is undefined;
    /**
     * The `util.deprecate()` method wraps `fn` (which may be a function or class) in
     * such a way that it is marked as deprecated.
     *
     * ```js
     * const util = require('util');
     *
     * exports.obsoleteFunction = util.deprecate(() => {
     *   // Do something here.
     * }, 'obsoleteFunction() is deprecated. Use newShinyFunction() instead.');
     * ```
     *
     * When called, `util.deprecate()` will return a function that will emit a`DeprecationWarning` using the `'warning'` event. The warning will
     * be emitted and printed to `stderr` the first time the returned function is
     * called. After the warning is emitted, the wrapped function is called without
     * emitting a warning.
     *
     * If the same optional `code` is supplied in multiple calls to `util.deprecate()`,
     * the warning will be emitted only once for that `code`.
     *
     * ```js
     * const util = require('util');
     *
     * const fn1 = util.deprecate(someFunction, someMessage, 'DEP0001');
     * const fn2 = util.deprecate(someOtherFunction, someOtherMessage, 'DEP0001');
     * fn1(); // Emits a deprecation warning with code DEP0001
     * fn2(); // Does not emit a deprecation warning because it has the same code
     * ```
     *
     * If either the `--no-deprecation` or `--no-warnings` command-line flags are
     * used, or if the `process.noDeprecation` property is set to `true`_prior_ to
     * the first deprecation warning, the `util.deprecate()` method does nothing.
     *
     * If the `--trace-deprecation` or `--trace-warnings` command-line flags are set,
     * or the `process.traceDeprecation` property is set to `true`, a warning and a
     * stack trace are printed to `stderr` the first time the deprecated function is
     * called.
     *
     * If the `--throw-deprecation` command-line flag is set, or the`process.throwDeprecation` property is set to `true`, then an exception will be
     * thrown when the deprecated function is called.
     *
     * The `--throw-deprecation` command-line flag and `process.throwDeprecation`property take precedence over `--trace-deprecation` and`process.traceDeprecation`.
     * @since v0.8.0
     * @param fn The function that is being deprecated.
     * @param msg A warning message to display when the deprecated function is invoked.
     * @param code A deprecation code. See the `list of deprecated APIs` for a list of codes.
     * @return The deprecated function wrapped to emit a warning.
     */
    export function deprecate<T extends Function>(fn: T, msg: string, code?: string): T;
    /**
     * Returns `true` if there is deep strict equality between `val1` and `val2`.
     * Otherwise, returns `false`.
     *
     * See `assert.deepStrictEqual()` for more information about deep strict
     * equality.
     * @since v9.0.0
     */
    export function isDeepStrictEqual(val1: unknown, val2: unknown): boolean;
    /**
     * Returns `str` with any ANSI escape codes removed.
     *
     * ```js
     * console.log(util.stripVTControlCharacters('\u001B[4mvalue\u001B[0m'));
     * // Prints "value"
     * ```
     * @since v16.11.0
     */
    export function stripVTControlCharacters(str: string): string;
    /**
     * Takes an `async` function (or a function that returns a `Promise`) and returns a
     * function following the error-first callback style, i.e. taking
     * an `(err, value) => ...` callback as the last argument. In the callback, the
     * first argument will be the rejection reason (or `null` if the `Promise`resolved), and the second argument will be the resolved value.
     *
     * ```js
     * const util = require('util');
     *
     * async function fn() {
     *   return 'hello world';
     * }
     * const callbackFunction = util.callbackify(fn);
     *
     * callbackFunction((err, ret) => {
     *   if (err) throw err;
     *   console.log(ret);
     * });
     * ```
     *
     * Will print:
     *
     * ```text
     * hello world
     * ```
     *
     * The callback is executed asynchronously, and will have a limited stack trace.
     * If the callback throws, the process will emit an `'uncaughtException'` event, and if not handled will exit.
     *
     * Since `null` has a special meaning as the first argument to a callback, if a
     * wrapped function rejects a `Promise` with a falsy value as a reason, the value
     * is wrapped in an `Error` with the original value stored in a field named`reason`.
     *
     * ```js
     * function fn() {
     *   return Promise.reject(null);
     * }
     * const callbackFunction = util.callbackify(fn);
     *
     * callbackFunction((err, ret) => {
     *   // When the Promise was rejected with `null` it is wrapped with an Error and
     *   // the original value is stored in `reason`.
     *   err &#x26;&#x26; err.hasOwnProperty('reason') &#x26;&#x26; err.reason === null;  // true
     * });
     * ```
     * @since v8.2.0
     * @param original An `async` function
     * @return a callback style function
     */
    export function callbackify(fn: () => Promise<void>): (callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<TResult>(fn: () => Promise<TResult>): (callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void;
    export function callbackify<T1>(fn: (arg1: T1) => Promise<void>): (arg1: T1, callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<T1, TResult>(fn: (arg1: T1) => Promise<TResult>): (arg1: T1, callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void;
    export function callbackify<T1, T2>(fn: (arg1: T1, arg2: T2) => Promise<void>): (arg1: T1, arg2: T2, callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<T1, T2, TResult>(fn: (arg1: T1, arg2: T2) => Promise<TResult>): (arg1: T1, arg2: T2, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
    export function callbackify<T1, T2, T3>(fn: (arg1: T1, arg2: T2, arg3: T3) => Promise<void>): (arg1: T1, arg2: T2, arg3: T3, callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<T1, T2, T3, TResult>(
        fn: (arg1: T1, arg2: T2, arg3: T3) => Promise<TResult>
    ): (arg1: T1, arg2: T2, arg3: T3, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
    export function callbackify<T1, T2, T3, T4>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<void>
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<T1, T2, T3, T4, TResult>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<TResult>
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
    export function callbackify<T1, T2, T3, T4, T5>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<void>
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<T1, T2, T3, T4, T5, TResult>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<TResult>
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
    export function callbackify<T1, T2, T3, T4, T5, T6>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6) => Promise<void>
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6, callback: (err: NodeJS.ErrnoException) => void) => void;
    export function callbackify<T1, T2, T3, T4, T5, T6, TResult>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6) => Promise<TResult>
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
    export interface CustomPromisifyLegacy<TCustom extends Function> extends Function {
        __promisify__: TCustom;
    }
    export interface CustomPromisifySymbol<TCustom extends Function> extends Function {
        [promisify.custom]: TCustom;
    }
    export type CustomPromisify<TCustom extends Function> = CustomPromisifySymbol<TCustom> | CustomPromisifyLegacy<TCustom>;
    /**
     * Takes a function following the common error-first callback style, i.e. taking
     * an `(err, value) => ...` callback as the last argument, and returns a version
     * that returns promises.
     *
     * ```js
     * const util = require('util');
     * const fs = require('fs');
     *
     * const stat = util.promisify(fs.stat);
     * stat('.').then((stats) => {
     *   // Do something with `stats`
     * }).catch((error) => {
     *   // Handle the error.
     * });
     * ```
     *
     * Or, equivalently using `async function`s:
     *
     * ```js
     * const util = require('util');
     * const fs = require('fs');
     *
     * const stat = util.promisify(fs.stat);
     *
     * async function callStat() {
     *   const stats = await stat('.');
     *   console.log(`This directory is owned by ${stats.uid}`);
     * }
     * ```
     *
     * If there is an `original[util.promisify.custom]` property present, `promisify`will return its value, see `Custom promisified functions`.
     *
     * `promisify()` assumes that `original` is a function taking a callback as its
     * final argument in all cases. If `original` is not a function, `promisify()`will throw an error. If `original` is a function but its last argument is not
     * an error-first callback, it will still be passed an error-first
     * callback as its last argument.
     *
     * Using `promisify()` on class methods or other methods that use `this` may not
     * work as expected unless handled specially:
     *
     * ```js
     * const util = require('util');
     *
     * class Foo {
     *   constructor() {
     *     this.a = 42;
     *   }
     *
     *   bar(callback) {
     *     callback(null, this.a);
     *   }
     * }
     *
     * const foo = new Foo();
     *
     * const naiveBar = util.promisify(foo.bar);
     * // TypeError: Cannot read property 'a' of undefined
     * // naiveBar().then(a => console.log(a));
     *
     * naiveBar.call(foo).then((a) => console.log(a)); // '42'
     *
     * const bindBar = naiveBar.bind(foo);
     * bindBar().then((a) => console.log(a)); // '42'
     * ```
     * @since v8.0.0
     */
    export function promisify<TCustom extends Function>(fn: CustomPromisify<TCustom>): TCustom;
    export function promisify<TResult>(fn: (callback: (err: any, result: TResult) => void) => void): () => Promise<TResult>;
    export function promisify(fn: (callback: (err?: any) => void) => void): () => Promise<void>;
    export function promisify<T1, TResult>(fn: (arg1: T1, callback: (err: any, result: TResult) => void) => void): (arg1: T1) => Promise<TResult>;
    export function promisify<T1>(fn: (arg1: T1, callback: (err?: any) => void) => void): (arg1: T1) => Promise<void>;
    export function promisify<T1, T2, TResult>(fn: (arg1: T1, arg2: T2, callback: (err: any, result: TResult) => void) => void): (arg1: T1, arg2: T2) => Promise<TResult>;
    export function promisify<T1, T2>(fn: (arg1: T1, arg2: T2, callback: (err?: any) => void) => void): (arg1: T1, arg2: T2) => Promise<void>;
    export function promisify<T1, T2, T3, TResult>(fn: (arg1: T1, arg2: T2, arg3: T3, callback: (err: any, result: TResult) => void) => void): (arg1: T1, arg2: T2, arg3: T3) => Promise<TResult>;
    export function promisify<T1, T2, T3>(fn: (arg1: T1, arg2: T2, arg3: T3, callback: (err?: any) => void) => void): (arg1: T1, arg2: T2, arg3: T3) => Promise<void>;
    export function promisify<T1, T2, T3, T4, TResult>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: any, result: TResult) => void) => void
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<TResult>;
    export function promisify<T1, T2, T3, T4>(fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err?: any) => void) => void): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<void>;
    export function promisify<T1, T2, T3, T4, T5, TResult>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: any, result: TResult) => void) => void
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<TResult>;
    export function promisify<T1, T2, T3, T4, T5>(
        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err?: any) => void) => void
    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<void>;
    export function promisify(fn: Function): Function;
    export namespace promisify {
        /**
         * That can be used to declare custom promisified variants of functions.
         */
        const custom: unique symbol;
    }
    /**
     * An implementation of the [WHATWG Encoding Standard](https://encoding.spec.whatwg.org/) `TextDecoder` API.
     *
     * ```js
     * const decoder = new TextDecoder('shift_jis');
     * let string = '';
     * let buffer;
     * while (buffer = getNextChunkSomehow()) {
     *   string += decoder.decode(buffer, { stream: true });
     * }
     * string += decoder.decode(); // end-of-stream
     * ```
     * @since v8.3.0
     */
    export class TextDecoder {
        /**
         * The encoding supported by the `TextDecoder` instance.
         */
        readonly encoding: string;
        /**
         * The value will be `true` if decoding errors result in a `TypeError` being
         * thrown.
         */
        readonly fatal: boolean;
        /**
         * The value will be `true` if the decoding result will include the byte order
         * mark.
         */
        readonly ignoreBOM: boolean;
        constructor(
            encoding?: string,
            options?: {
                fatal?: boolean | undefined;
                ignoreBOM?: boolean | undefined;
            }
        );
        /**
         * Decodes the `input` and returns a string. If `options.stream` is `true`, any
         * incomplete byte sequences occurring at the end of the `input` are buffered
         * internally and emitted after the next call to `textDecoder.decode()`.
         *
         * If `textDecoder.fatal` is `true`, decoding errors that occur will result in a`TypeError` being thrown.
         * @param input An `ArrayBuffer`, `DataView` or `TypedArray` instance containing the encoded data.
         */
        decode(
            input?: NodeJS.ArrayBufferView | ArrayBuffer | null,
            options?: {
                stream?: boolean | undefined;
            }
        ): string;
    }
    export interface EncodeIntoResult {
        /**
         * The read Unicode code units of input.
         */
        read: number;
        /**
         * The written UTF-8 bytes of output.
         */
        written: number;
    }
    export { types };
    /**
     * An implementation of the [WHATWG Encoding Standard](https://encoding.spec.whatwg.org/) `TextEncoder` API. All
     * instances of `TextEncoder` only support UTF-8 encoding.
     *
     * ```js
     * const encoder = new TextEncoder();
     * const uint8array = encoder.encode('this is some data');
     * ```
     *
     * The `TextEncoder` class is also available on the global object.
     * @since v8.3.0
     */
    export class TextEncoder {
        /**
         * The encoding supported by the `TextEncoder` instance. Always set to `'utf-8'`.
         */
        readonly encoding: string;
        /**
         * UTF-8 encodes the `input` string and returns a `Uint8Array` containing the
         * encoded bytes.
         * @param [input='an empty string'] The text to encode.
         */
        encode(input?: string): Uint8Array;
        /**
         * UTF-8 encodes the `src` string to the `dest` Uint8Array and returns an object
         * containing the read Unicode code units and written UTF-8 bytes.
         *
         * ```js
         * const encoder = new TextEncoder();
         * const src = 'this is some data';
         * const dest = new Uint8Array(10);
         * const { read, written } = encoder.encodeInto(src, dest);
         * ```
         * @param src The text to encode.
         * @param dest The array to hold the encode result.
         */
        encodeInto(src: string, dest: Uint8Array): EncodeIntoResult;
    }
}
declare module 'util/types' {
    export * from 'util/types';
}
declare module 'util/types' {
    import { KeyObject, webcrypto } from 'node:crypto';
    /**
     * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) or
     * [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance.
     *
     * See also `util.types.isArrayBuffer()` and `util.types.isSharedArrayBuffer()`.
     *
     * ```js
     * util.types.isAnyArrayBuffer(new ArrayBuffer());  // Returns true
     * util.types.isAnyArrayBuffer(new SharedArrayBuffer());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isAnyArrayBuffer(object: unknown): object is ArrayBufferLike;
    /**
     * Returns `true` if the value is an `arguments` object.
     *
     * ```js
     * function foo() {
     *   util.types.isArgumentsObject(arguments);  // Returns true
     * }
     * ```
     * @since v10.0.0
     */
    function isArgumentsObject(object: unknown): object is IArguments;
    /**
     * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instance.
     * This does _not_ include [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instances. Usually, it is
     * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that.
     *
     * ```js
     * util.types.isArrayBuffer(new ArrayBuffer());  // Returns true
     * util.types.isArrayBuffer(new SharedArrayBuffer());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isArrayBuffer(object: unknown): object is ArrayBuffer;
    /**
     * Returns `true` if the value is an instance of one of the [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) views, such as typed
     * array objects or [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView). Equivalent to
     * [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
     *
     * ```js
     * util.types.isArrayBufferView(new Int8Array());  // true
     * util.types.isArrayBufferView(Buffer.from('hello world')); // true
     * util.types.isArrayBufferView(new DataView(new ArrayBuffer(16)));  // true
     * util.types.isArrayBufferView(new ArrayBuffer());  // false
     * ```
     * @since v10.0.0
     */
    function isArrayBufferView(object: unknown): object is NodeJS.ArrayBufferView;
    /**
     * Returns `true` if the value is an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function).
     * This only reports back what the JavaScript engine is seeing;
     * in particular, the return value may not match the original source code if
     * a transpilation tool was used.
     *
     * ```js
     * util.types.isAsyncFunction(function foo() {});  // Returns false
     * util.types.isAsyncFunction(async function foo() {});  // Returns true
     * ```
     * @since v10.0.0
     */
    function isAsyncFunction(object: unknown): boolean;
    /**
     * Returns `true` if the value is a `BigInt64Array` instance.
     *
     * ```js
     * util.types.isBigInt64Array(new BigInt64Array());   // Returns true
     * util.types.isBigInt64Array(new BigUint64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isBigInt64Array(value: unknown): value is BigInt64Array;
    /**
     * Returns `true` if the value is a `BigUint64Array` instance.
     *
     * ```js
     * util.types.isBigUint64Array(new BigInt64Array());   // Returns false
     * util.types.isBigUint64Array(new BigUint64Array());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isBigUint64Array(value: unknown): value is BigUint64Array;
    /**
     * Returns `true` if the value is a boolean object, e.g. created
     * by `new Boolean()`.
     *
     * ```js
     * util.types.isBooleanObject(false);  // Returns false
     * util.types.isBooleanObject(true);   // Returns false
     * util.types.isBooleanObject(new Boolean(false)); // Returns true
     * util.types.isBooleanObject(new Boolean(true));  // Returns true
     * util.types.isBooleanObject(Boolean(false)); // Returns false
     * util.types.isBooleanObject(Boolean(true));  // Returns false
     * ```
     * @since v10.0.0
     */
    function isBooleanObject(object: unknown): object is Boolean;
    /**
     * Returns `true` if the value is any boxed primitive object, e.g. created
     * by `new Boolean()`, `new String()` or `Object(Symbol())`.
     *
     * For example:
     *
     * ```js
     * util.types.isBoxedPrimitive(false); // Returns false
     * util.types.isBoxedPrimitive(new Boolean(false)); // Returns true
     * util.types.isBoxedPrimitive(Symbol('foo')); // Returns false
     * util.types.isBoxedPrimitive(Object(Symbol('foo'))); // Returns true
     * util.types.isBoxedPrimitive(Object(BigInt(5))); // Returns true
     * ```
     * @since v10.11.0
     */
    function isBoxedPrimitive(object: unknown): object is String | Number | BigInt | Boolean | Symbol;
    /**
     * Returns `true` if the value is a built-in [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView) instance.
     *
     * ```js
     * const ab = new ArrayBuffer(20);
     * util.types.isDataView(new DataView(ab));  // Returns true
     * util.types.isDataView(new Float64Array());  // Returns false
     * ```
     *
     * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
     * @since v10.0.0
     */
    function isDataView(object: unknown): object is DataView;
    /**
     * Returns `true` if the value is a built-in [`Date`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) instance.
     *
     * ```js
     * util.types.isDate(new Date());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isDate(object: unknown): object is Date;
    /**
     * Returns `true` if the value is a native `External` value.
     *
     * A native `External` value is a special type of object that contains a
     * raw C++ pointer (`void*`) for access from native code, and has no other
     * properties. Such objects are created either by Node.js internals or native
     * addons. In JavaScript, they are [frozen](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze) objects with a`null` prototype.
     *
     * ```c
     * #include <js_native_api.h>
     * #include <stdlib.h>
     * napi_value result;
     * static napi_value MyNapi(napi_env env, napi_callback_info info) {
     *   int* raw = (int*) malloc(1024);
     *   napi_status status = napi_create_external(env, (void*) raw, NULL, NULL, &#x26;result);
     *   if (status != napi_ok) {
     *     napi_throw_error(env, NULL, "napi_create_external failed");
     *     return NULL;
     *   }
     *   return result;
     * }
     * ...
     * DECLARE_NAPI_PROPERTY("myNapi", MyNapi)
     * ...
     * ```
     *
     * ```js
     * const native = require('napi_addon.node');
     * const data = native.myNapi();
     * util.types.isExternal(data); // returns true
     * util.types.isExternal(0); // returns false
     * util.types.isExternal(new String('foo')); // returns false
     * ```
     *
     * For further information on `napi_create_external`, refer to `napi_create_external()`.
     * @since v10.0.0
     */
    function isExternal(object: unknown): boolean;
    /**
     * Returns `true` if the value is a built-in [`Float32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array) instance.
     *
     * ```js
     * util.types.isFloat32Array(new ArrayBuffer());  // Returns false
     * util.types.isFloat32Array(new Float32Array());  // Returns true
     * util.types.isFloat32Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isFloat32Array(object: unknown): object is Float32Array;
    /**
     * Returns `true` if the value is a built-in [`Float64Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array) instance.
     *
     * ```js
     * util.types.isFloat64Array(new ArrayBuffer());  // Returns false
     * util.types.isFloat64Array(new Uint8Array());  // Returns false
     * util.types.isFloat64Array(new Float64Array());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isFloat64Array(object: unknown): object is Float64Array;
    /**
     * Returns `true` if the value is a generator function.
     * This only reports back what the JavaScript engine is seeing;
     * in particular, the return value may not match the original source code if
     * a transpilation tool was used.
     *
     * ```js
     * util.types.isGeneratorFunction(function foo() {});  // Returns false
     * util.types.isGeneratorFunction(function* foo() {});  // Returns true
     * ```
     * @since v10.0.0
     */
    function isGeneratorFunction(object: unknown): object is GeneratorFunction;
    /**
     * Returns `true` if the value is a generator object as returned from a
     * built-in generator function.
     * This only reports back what the JavaScript engine is seeing;
     * in particular, the return value may not match the original source code if
     * a transpilation tool was used.
     *
     * ```js
     * function* foo() {}
     * const generator = foo();
     * util.types.isGeneratorObject(generator);  // Returns true
     * ```
     * @since v10.0.0
     */
    function isGeneratorObject(object: unknown): object is Generator;
    /**
     * Returns `true` if the value is a built-in [`Int8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array) instance.
     *
     * ```js
     * util.types.isInt8Array(new ArrayBuffer());  // Returns false
     * util.types.isInt8Array(new Int8Array());  // Returns true
     * util.types.isInt8Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isInt8Array(object: unknown): object is Int8Array;
    /**
     * Returns `true` if the value is a built-in [`Int16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array) instance.
     *
     * ```js
     * util.types.isInt16Array(new ArrayBuffer());  // Returns false
     * util.types.isInt16Array(new Int16Array());  // Returns true
     * util.types.isInt16Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isInt16Array(object: unknown): object is Int16Array;
    /**
     * Returns `true` if the value is a built-in [`Int32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array) instance.
     *
     * ```js
     * util.types.isInt32Array(new ArrayBuffer());  // Returns false
     * util.types.isInt32Array(new Int32Array());  // Returns true
     * util.types.isInt32Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isInt32Array(object: unknown): object is Int32Array;
    /**
     * Returns `true` if the value is a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance.
     *
     * ```js
     * util.types.isMap(new Map());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isMap<T>(object: T | {}): object is T extends ReadonlyMap<any, any> ? (unknown extends T ? never : ReadonlyMap<any, any>) : Map<unknown, unknown>;
    /**
     * Returns `true` if the value is an iterator returned for a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance.
     *
     * ```js
     * const map = new Map();
     * util.types.isMapIterator(map.keys());  // Returns true
     * util.types.isMapIterator(map.values());  // Returns true
     * util.types.isMapIterator(map.entries());  // Returns true
     * util.types.isMapIterator(map[Symbol.iterator]());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isMapIterator(object: unknown): boolean;
    /**
     * Returns `true` if the value is an instance of a [Module Namespace Object](https://tc39.github.io/ecma262/#sec-module-namespace-exotic-objects).
     *
     * ```js
     * import * as ns from './a.js';
     *
     * util.types.isModuleNamespaceObject(ns);  // Returns true
     * ```
     * @since v10.0.0
     */
    function isModuleNamespaceObject(value: unknown): boolean;
    /**
     * Returns `true` if the value is an instance of a built-in `Error` type.
     *
     * ```js
     * util.types.isNativeError(new Error());  // Returns true
     * util.types.isNativeError(new TypeError());  // Returns true
     * util.types.isNativeError(new RangeError());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isNativeError(object: unknown): object is Error;
    /**
     * Returns `true` if the value is a number object, e.g. created
     * by `new Number()`.
     *
     * ```js
     * util.types.isNumberObject(0);  // Returns false
     * util.types.isNumberObject(new Number(0));   // Returns true
     * ```
     * @since v10.0.0
     */
    function isNumberObject(object: unknown): object is Number;
    /**
     * Returns `true` if the value is a built-in [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise).
     *
     * ```js
     * util.types.isPromise(Promise.resolve(42));  // Returns true
     * ```
     * @since v10.0.0
     */
    function isPromise(object: unknown): object is Promise<unknown>;
    /**
     * Returns `true` if the value is a [`Proxy`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) instance.
     *
     * ```js
     * const target = {};
     * const proxy = new Proxy(target, {});
     * util.types.isProxy(target);  // Returns false
     * util.types.isProxy(proxy);  // Returns true
     * ```
     * @since v10.0.0
     */
    function isProxy(object: unknown): boolean;
    /**
     * Returns `true` if the value is a regular expression object.
     *
     * ```js
     * util.types.isRegExp(/abc/);  // Returns true
     * util.types.isRegExp(new RegExp('abc'));  // Returns true
     * ```
     * @since v10.0.0
     */
    function isRegExp(object: unknown): object is RegExp;
    /**
     * Returns `true` if the value is a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance.
     *
     * ```js
     * util.types.isSet(new Set());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isSet<T>(object: T | {}): object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown>;
    /**
     * Returns `true` if the value is an iterator returned for a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance.
     *
     * ```js
     * const set = new Set();
     * util.types.isSetIterator(set.keys());  // Returns true
     * util.types.isSetIterator(set.values());  // Returns true
     * util.types.isSetIterator(set.entries());  // Returns true
     * util.types.isSetIterator(set[Symbol.iterator]());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isSetIterator(object: unknown): boolean;
    /**
     * Returns `true` if the value is a built-in [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance.
     * This does _not_ include [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instances. Usually, it is
     * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that.
     *
     * ```js
     * util.types.isSharedArrayBuffer(new ArrayBuffer());  // Returns false
     * util.types.isSharedArrayBuffer(new SharedArrayBuffer());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isSharedArrayBuffer(object: unknown): object is SharedArrayBuffer;
    /**
     * Returns `true` if the value is a string object, e.g. created
     * by `new String()`.
     *
     * ```js
     * util.types.isStringObject('foo');  // Returns false
     * util.types.isStringObject(new String('foo'));   // Returns true
     * ```
     * @since v10.0.0
     */
    function isStringObject(object: unknown): object is String;
    /**
     * Returns `true` if the value is a symbol object, created
     * by calling `Object()` on a `Symbol` primitive.
     *
     * ```js
     * const symbol = Symbol('foo');
     * util.types.isSymbolObject(symbol);  // Returns false
     * util.types.isSymbolObject(Object(symbol));   // Returns true
     * ```
     * @since v10.0.0
     */
    function isSymbolObject(object: unknown): object is Symbol;
    /**
     * Returns `true` if the value is a built-in [`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray) instance.
     *
     * ```js
     * util.types.isTypedArray(new ArrayBuffer());  // Returns false
     * util.types.isTypedArray(new Uint8Array());  // Returns true
     * util.types.isTypedArray(new Float64Array());  // Returns true
     * ```
     *
     * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
     * @since v10.0.0
     */
    function isTypedArray(object: unknown): object is NodeJS.TypedArray;
    /**
     * Returns `true` if the value is a built-in [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) instance.
     *
     * ```js
     * util.types.isUint8Array(new ArrayBuffer());  // Returns false
     * util.types.isUint8Array(new Uint8Array());  // Returns true
     * util.types.isUint8Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isUint8Array(object: unknown): object is Uint8Array;
    /**
     * Returns `true` if the value is a built-in [`Uint8ClampedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray) instance.
     *
     * ```js
     * util.types.isUint8ClampedArray(new ArrayBuffer());  // Returns false
     * util.types.isUint8ClampedArray(new Uint8ClampedArray());  // Returns true
     * util.types.isUint8ClampedArray(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isUint8ClampedArray(object: unknown): object is Uint8ClampedArray;
    /**
     * Returns `true` if the value is a built-in [`Uint16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array) instance.
     *
     * ```js
     * util.types.isUint16Array(new ArrayBuffer());  // Returns false
     * util.types.isUint16Array(new Uint16Array());  // Returns true
     * util.types.isUint16Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isUint16Array(object: unknown): object is Uint16Array;
    /**
     * Returns `true` if the value is a built-in [`Uint32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array) instance.
     *
     * ```js
     * util.types.isUint32Array(new ArrayBuffer());  // Returns false
     * util.types.isUint32Array(new Uint32Array());  // Returns true
     * util.types.isUint32Array(new Float64Array());  // Returns false
     * ```
     * @since v10.0.0
     */
    function isUint32Array(object: unknown): object is Uint32Array;
    /**
     * Returns `true` if the value is a built-in [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) instance.
     *
     * ```js
     * util.types.isWeakMap(new WeakMap());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isWeakMap(object: unknown): object is WeakMap<object, unknown>;
    /**
     * Returns `true` if the value is a built-in [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) instance.
     *
     * ```js
     * util.types.isWeakSet(new WeakSet());  // Returns true
     * ```
     * @since v10.0.0
     */
    function isWeakSet(object: unknown): object is WeakSet<object>;
    /**
     * Returns `true` if `value` is a `KeyObject`, `false` otherwise.
     * @since v16.2.0
     */
    function isKeyObject(object: unknown): object is KeyObject;
    /**
     * Returns `true` if `value` is a `CryptoKey`, `false` otherwise.
     * @since v16.2.0
     */
    function isCryptoKey(object: unknown): object is webcrypto.CryptoKey;
}
declare module 'node:util' {
    export * from 'util';
}
declare module 'node:util/types' {
    export * from 'util/types';
}