declare class Cidr {
    /**
     * Allocate a Cidr from a string
     * @param {string} - IP address string (must be trimed)
     * @returns {string} - A new CidiEntity object
     */
    static from(ipstr: string): Cidr;
    /**
     * Match a CIDR address to another CIDR
     * @param {IpCheck | string} matcher - The CIDR address to match.
     * @param {IpCheck | string} matchee - The CIDR address as the matching target.
     * @returns {boolean} - True if 'matcher' is the host or subnet of 'matchee', otherwise false.
     */
    static isMatched(matcher: Cidr | string, matchee: Cidr | string): boolean;
    private readonly _ipVersion;
    private readonly valid;
    private readonly mask;
    private readonly address;
    private readonly ipString;
    /**
     * Cidr class, use to define an entity that repsents a CIDR (IP Classless Inter-Domain Routing) address
     * (supporting IPv4 & IPv6). A host IP address is treated as a CIDR address too.
     * For example, `10.10.10.10` is equivalent to `10.10.10.10/32`.
     * @constructor
     * @param {string} ipstr - IP address string (must be trimed)
     */
    constructor(ipstr: string);
    /**
     * Match IP(v4/v6) address with IP CIDR
     * @param {Cidr | string} cidr - The CIDR used to match this object
     * @returns {boolean} - The matched/mis-matched indicator
     */
    isMatched(cidr: Cidr | string): boolean;
    /**
     * Get IP version
     * @returns {number} - 0 for invalid address, 4 for IPv4 and 6 for IPv6
     */
    ipVersion(): number;
    /**
     * Check if the object is valid, Cidr never throw errors, use this function to validate.
     * @returns {boolean} - false for constructed with invalid IP address or netmask, otherwise yes.
     */
    isValid(): boolean;
    /**
     * Get netmask length
     * @returns {number} - CIDR length (treat an IPv4 address as an IPv4-compatible IPv6 address)
     */
    netmask(): number;
    /**
     * Get original IP string
     * @returns {string} - Original IP string
     */
    toString(): string;
    private parseIpV4;
    private parseIpV6;
}
export { Cidr };