import { AbstractType } from "./AbstractType";
import { conversion, Req, scalar } from "@huz-com/types";
import { AlphaTypeOption } from "./index.interfaces";
declare type T = scalar.Alpha;
declare type O = AlphaTypeOption;
export declare class AlphaType extends AbstractType<T, O> {
    protected static readonly _PATTERN: RegExp;
    protected static _ins: AlphaType;
    /**
     * Returns skeleton instance
     * */
    static ins(): AlphaType;
    constructor();
    /**
     * Checks is alpha?
     */
    is(value: scalar.Unknown, opt?: O, req?: Req): boolean;
    protected _option(opt?: O): conversion.CastBase | O;
    /**
     * Converts a value to alpha
     */
    cast(value: scalar.Unknown, opt?: O, req?: Req): T | null;
}
export {};