import type { AnyObject } from '../types';
export declare function tryLoadJSON5(useCache?: boolean): Promise<JSON>;
export declare function safeJsonParse<T extends AnyObject>(input: string, useJSON5?: boolean, ignoreError?: boolean): T;
export declare function safeStringify(obj: any, space?: string | number, useJSON5?: boolean): string;
/**
 * 获取一个对象的 key 列表（返回指定的类型）
 */
export declare function getObjectKeysUnsafe<T extends object>(value: T): (keyof T)[];
export declare function deepClone<T extends object>(obj: T): T;
export declare function mixin<T = any>(destination: AnyObject, source: AnyObject, overwrite?: boolean): T;
/** 合并类数组对象。若执行了合并，会去除重复的值 */
export declare function mergeArrayLike<T>(a: T, b: unknown): T;
export interface SimpleAssignOptions {
    filter?: (value: unknown, key: string) => boolean;
    /** 是否对类数组(Array、Set、Map) 作合并并去重。为 false 则简单替换。默认为 false */
    mergeArrayLike?: boolean;
}
/**
 * 将 b 深度合并到 a
 */
export declare function simpleAssign<T extends Record<string, any>, U>(a: T, b: U, options?: SimpleAssignOptions, seen?: Set<unknown>): T & U;
/**
 * 将 b 深度合并到 a，但不包括属性值为 null 的属性
 * @param {boolean} [isOnlyNil=true] 是否仅忽略 null 和 undefined。为 false 则忽略所有空值(![key] === true)
 */
export declare function assignExceptNil<T extends object, U>(a: T, b: U, isOnlyExceptNull?: boolean): T & U;
/** 简易的对象深复制 */
export declare function assign<T extends object>(a: T, ...args: Record<any, any>[]): T;
export declare function ensureArray<T>(input: readonly T[] | T | undefined | null): readonly T[];
/** 将 object 所有 key 转换为小写 */
export declare function toLowcaseKeyObject<T extends Record<string, unknown>>(info?: T): T;
/** 过滤指定的key或空值，返回新的对象 */
export declare function objectFilterByKeys<T extends Record<string, unknown>>(obj: T, options?: {
    removeKeys?: (string | RegExp)[];
    onlyKeys?: (string | RegExp)[];
    removeNil?: boolean;
}): Record<string, any>;