/**
 * Language utility functions for type checking and validation
 */
import { isObjectLike } from "../internal/utils.js";
/**
 * Checks if value is classified as an Array object.
 *
 * @param value - The value to check
 * @returns Returns true if value is an array, else false
 *
 * @example
 * isArray([1, 2, 3]);
 * // => true
 *
 * isArray('abc');
 * // => false
 */
export declare function isArray(value: unknown): value is unknown[];
/**
 * Checks if value is array-like.
 *
 * @param value - The value to check
 * @returns Returns true if value is array-like, else false
 *
 * @example
 * isArrayLike([1, 2, 3]);
 * // => true
 *
 * isArrayLike('abc');
 * // => true
 *
 * isArrayLike(Function);
 * // => false
 */
export declare function isArrayLike(value: unknown): boolean;
/**
 * Checks if value is array-like object.
 *
 * @param value - The value to check
 * @returns Returns true if value is an array-like object, else false
 *
 * @example
 * isArrayLikeObject([1, 2, 3]);
 * // => true
 *
 * isArrayLikeObject('abc');
 * // => false
 */
export declare function isArrayLikeObject(value: unknown): boolean;
/**
 * Checks if value is classified as a boolean primitive or object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a boolean, else false
 *
 * @example
 * isBoolean(false);
 * // => true
 *
 * isBoolean(null);
 * // => false
 */
export declare function isBoolean(value: unknown): value is boolean;
/**
 * Checks if value is classified as a Date object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a date object, else false
 *
 * @example
 * isDate(new Date);
 * // => true
 *
 * isDate('Mon April 23 2012');
 * // => false
 */
export declare function isDate(value: unknown): value is Date;
/**
 * Checks if value is an empty object, collection, map, or set.
 *
 * @param value - The value to check
 * @returns Returns true if value is empty, else false
 *
 * @example
 * isEmpty(null);
 * // => true
 *
 * isEmpty(true);
 * // => true
 *
 * isEmpty(1);
 * // => true
 *
 * isEmpty([1, 2, 3]);
 * // => false
 *
 * isEmpty({ 'a': 1 });
 * // => false
 */
export declare function isEmpty(value: unknown): boolean;
/**
 * Checks if value is an Error, EvalError, RangeError, ReferenceError,
 * SyntaxError, TypeError, or URIError object.
 *
 * @param value - The value to check
 * @returns Returns true if value is an error object, else false
 *
 * @example
 * isError(new Error);
 * // => true
 *
 * isError(Error);
 * // => false
 */
export declare function isError(value: unknown): value is Error;
/**
 * Checks if value is a finite primitive number.
 *
 * @param value - The value to check
 * @returns Returns true if value is a finite number, else false
 *
 * @example
 * isFinite(3);
 * // => true
 *
 * isFinite(Number.MIN_VALUE);
 * // => true
 *
 * isFinite(Infinity);
 * // => false
 *
 * isFinite('3');
 * // => false
 */
export declare function isFinite(value: unknown): value is number;
/**
 * Checks if value is classified as a Function object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a function, else false
 *
 * @example
 * isFunction(() => {});
 * // => true
 *
 * isFunction(/abc/);
 * // => false
 */
export declare function isFunction(value: unknown): value is Function;
/**
 * Checks if value is an integer.
 *
 * @param value - The value to check
 * @returns Returns true if value is an integer, else false
 *
 * @example
 * isInteger(3);
 * // => true
 *
 * isInteger(Number.MIN_VALUE);
 * // => false
 *
 * isInteger(Infinity);
 * // => false
 *
 * isInteger('3');
 * // => false
 */
export declare function isInteger(value: unknown): value is number;
/**
 * Checks if value is a valid array-like length.
 *
 * @param value - The value to check
 * @returns Returns true if value is a valid length, else false
 *
 * @example
 * isLength(3);
 * // => true
 *
 * isLength(Number.MIN_VALUE);
 * // => false
 *
 * isLength(Infinity);
 * // => false
 *
 * isLength('3');
 * // => false
 */
export declare function isLength(value: unknown): boolean;
/**
 * Checks if value is classified as a Map object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a map, else false
 *
 * @example
 * isMap(new Map);
 * // => true
 *
 * isMap(new WeakMap);
 * // => false
 */
export declare function isMap(value: unknown): value is Map<any, any>;
/**
 * Checks if value is NaN.
 *
 * @param value - The value to check
 * @returns Returns true if value is NaN, else false
 *
 * @example
 * isNaN(NaN);
 * // => true
 *
 * isNaN(new Number(NaN));
 * // => true
 *
 * isNaN(undefined);
 * // => false
 */
export declare function isNaN(value: unknown): boolean;
/**
 * Checks if value is null.
 *
 * @param value - The value to check
 * @returns Returns true if value is null, else false
 *
 * @example
 * isNull(null);
 * // => true
 *
 * isNull(void 0);
 * // => false
 */
export declare function isNull(value: unknown): value is null;
/**
 * Checks if value is null or undefined.
 *
 * @param value - The value to check
 * @returns Returns true if value is nullish, else false
 *
 * @example
 * isNil(null);
 * // => true
 *
 * isNil(void 0);
 * // => true
 *
 * isNil(NaN);
 * // => false
 */
export declare function isNil(value: unknown): value is null | undefined;
/**
 * Checks if value is classified as a Number primitive or object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a number, else false
 *
 * @example
 * isNumber(3);
 * // => true
 *
 * isNumber(Number.MIN_VALUE);
 * // => true
 *
 * isNumber(Infinity);
 * // => true
 *
 * isNumber('3');
 * // => false
 */
export declare function isNumber(value: unknown): value is number;
/**
 * Checks if value is the language type of Object.
 *
 * @param value - The value to check
 * @returns Returns true if value is an object, else false
 *
 * @example
 * isObject({});
 * // => true
 *
 * isObject([1, 2, 3]);
 * // => true
 *
 * isObject(() => {});
 * // => true
 *
 * isObject(null);
 * // => false
 */
export declare function isObject(value: unknown): value is object;
/**
 * Checks if value is object-like.
 *
 * @param value - The value to check
 * @returns Returns true if value is object-like, else false
 *
 * @example
 * isObjectLike({});
 * // => true
 *
 * isObjectLike([1, 2, 3]);
 * // => true
 *
 * isObjectLike(() => {});
 * // => false
 *
 * isObjectLike(null);
 * // => false
 */
export { isObjectLike };
/**
 * Checks if value is a plain object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a plain object, else false
 *
 * @example
 * isPlainObject({});
 * // => true
 *
 * isPlainObject([1, 2, 3]);
 * // => false
 *
 * isPlainObject(() => {});
 * // => false
 */
export declare function isPlainObject(value: unknown): value is Record<string, any>;
/**
 * Checks if value is classified as a RegExp object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a regexp, else false
 *
 * @example
 * isRegExp(/abc/);
 * // => true
 *
 * isRegExp('/abc/');
 * // => false
 */
export declare function isRegExp(value: unknown): value is RegExp;
/**
 * Checks if value is a safe integer.
 *
 * @param value - The value to check
 * @returns Returns true if value is a safe integer, else false
 *
 * @example
 * isSafeInteger(3);
 * // => true
 *
 * isSafeInteger(Number.MIN_VALUE);
 * // => false
 *
 * isSafeInteger(Infinity);
 * // => false
 *
 * isSafeInteger('3');
 * // => false
 */
export declare function isSafeInteger(value: unknown): value is number;
/**
 * Checks if value is classified as a Set object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a set, else false
 *
 * @example
 * isSet(new Set);
 * // => true
 *
 * isSet(new WeakSet);
 * // => false
 */
export declare function isSet(value: unknown): value is Set<any>;
/**
 * Checks if value is classified as a String primitive or object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a string, else false
 *
 * @example
 * isString('abc');
 * // => true
 *
 * isString(1);
 * // => false
 */
export declare function isString(value: unknown): value is string;
/**
 * Checks if value is classified as a Symbol primitive or object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a symbol, else false
 *
 * @example
 * isSymbol(Symbol.iterator);
 * // => true
 *
 * isSymbol('abc');
 * // => false
 */
export declare function isSymbol(value: unknown): value is symbol;
/**
 * Checks if value is undefined.
 *
 * @param value - The value to check
 * @returns Returns true if value is undefined, else false
 *
 * @example
 * isUndefined(void 0);
 * // => true
 *
 * isUndefined(null);
 * // => false
 */
export declare function isUndefined(value: unknown): value is undefined;
/**
 * Checks if value is classified as a WeakMap object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a weak map, else false
 *
 * @example
 * isWeakMap(new WeakMap);
 * // => true
 *
 * isWeakMap(new Map);
 * // => false
 */
export declare function isWeakMap(value: unknown): value is WeakMap<any, any>;
/**
 * Checks if value is classified as a WeakSet object.
 *
 * @param value - The value to check
 * @returns Returns true if value is a weak set, else false
 *
 * @example
 * isWeakSet(new WeakSet);
 * // => true
 *
 * isWeakSet(new Set);
 * // => false
 */
export declare function isWeakSet(value: unknown): value is WeakSet<any>;