export default class Option {
    flags: string;
    defaultValue?: any;
    /** this option need parameter value. it is required. */
    required: boolean;
    /** this option need parameter value. it is optional. */
    optional: boolean;
    /** this option is default true. if specified this option, value is become false. */
    no: boolean;
    /** short style. e.g. -o */
    short?: string;
    /** long style. e.g. --option */
    long: string;
    /** description of this option */
    description: string;
    /**
     * class of option.
     * ```
     * cmd --path foo/bar buzz.txt
     *       ↑ this one!
     * ```
     * @param flags pass '-f, --foo'(boolean) or '--foo'(boolean) or '--foo <bar>'(string[]) or '--foo [bar]'(string[]).
     * @param description
     * @param defaultValue
     * @class
     */
    constructor(flags: string, description?: string, defaultValue?: any);
    /**
     * name of this option.
     * @returns {any}
     */
    name(): string;
    /**
     * check arg is matches this option.
     * @param arg
     * @returns {boolean}
     */
    is(arg: string): boolean;
    /**
     * parse args.
     * build to opts.
     *
     * e.g. #1
     *   instance member:  required=true, optional=false, short=-f, long=--foo
     *   method arguments: opts={}, args=["--foo", "foo!", "bar!"].
     *   opts are modified to { foo: ["foo!"] } and return ["bar!"].
     *
     * e.g. #2
     *   instance member:  required=true, optional=false, short=-f, long=--foo
     *   method arguments: opts={ foo: ["foo?"] }, args=["--foo", "foo!", "bar!"].
     *   opts are modified to { foo: ["foo?", "foo!"] } and return ["bar!"].
     *
     * e.g. #3
     *   instance member:  required=false, optional=false, short=-f, long=--foo
     *   method arguments: opts={}, args=["-f", "foo!", "bar!"].
     *   opts are modified to { foo: true } and return ["foo!", "bar!"].
     *
     * @param opts
     * @param args
     * @returns {string[]}
     */
    parse(opts: any, args: string[]): string[];
}