import { IParameter } from "../../types.mjs";
/**
 * Base class for a parameter.
 *
 * @export
 * @abstract
 * @class ParameterBase
 * @implements {IParameter}
 */
export declare abstract class ParameterBase implements IParameter {
    name: string;
    defaultValue: any;
    /**
     * Gets the string version of the regular expression
     * that will be used to map the parameter value.
     *
     * @readonly
     * @abstract
     * @type {string}
     * @memberof ParameterBase
     */
    abstract get regex(): string;
    /**
     * Indicates that this parameter is optional.
     * A user does not have to provide a value
     * in order for this command to be valid.
     *
     * @readonly
     * @memberof ParameterBase
     */
    get optional(): boolean;
    /**
     * Creates an instance of ParameterBase.
     * @param {string} name The name of the parameter. Can be used to identify the parameter value as well.
     * @param {any} [defaultValue=null] When a value is given, the parameter becomes optional.
     * @memberof ParameterBase
     */
    constructor(name: string, defaultValue?: any);
}