/**
 * @file Argument
 * @module kronk/lib/Argument
 */
import Parseable from '#lib/parseable.abstract';
import type { ArgumentData, ArgumentInfo, ArgumentMetadata, ArgumentSyntax } from '@flex-development/kronk';
/**
 * A command-argument.
 *
 * The `Argument` model is used to define the expected arguments of a command.
 *
 * Argument syntax is tokenized using {@linkcode initialArgument} construct.
 *
 * @see {@linkcode Parseable}
 *
 * @class
 * @extends {Parseable}
 */
declare class Argument extends Parseable {
    /**
     * Argument metadata.
     *
     * @see {@linkcode ArgumentMetadata}
     *
     * @protected
     * @instance
     * @override
     * @member {ArgumentMetadata} info
     */
    protected info: ArgumentMetadata;
    /**
     * Create a new command-argument.
     *
     * @see {@linkcode ArgumentInfo}
     *
     * @param {ArgumentInfo | string} info
     *  Argument info or syntax
     */
    constructor(info: ArgumentInfo | string);
    /**
     * Create a new command-argument.
     *
     * @see {@linkcode ArgumentData}
     *
     * @param {string} syntax
     *  Argument syntax
     * @param {ArgumentData | null | undefined} [info]
     *  Additional argument data
     */
    constructor(syntax: string, info?: ArgumentData | null | undefined);
    /**
     * The argument syntax id.
     *
     * @public
     * @instance
     *
     * @return {string}
     *  Argument syntax id
     */
    get id(): string;
    /**
     * The normalized argument syntax string.
     *
     * @see {@linkcode ArgumentSyntax}
     *
     * @public
     * @instance
     *
     * @return {ArgumentSyntax}
     *  Argument syntax
     */
    get syntax(): ArgumentSyntax;
    /**
     * Get the argument as a human-readable string.
     *
     * @public
     * @instance
     *
     * @return {string}
     *  String representation of `this` argument
     */
    toString(): string;
    /**
     * Tokenize argument `syntax`.
     *
     * > 👉 **Note**: Modifies `this.info.syntax` and expects its value to be a
     * > trimmed string before modification.
     *
     * @see {@linkcode KronkError}
     *
     * @protected
     * @instance
     *
     * @return {undefined}
     * @throws {KronkError}
     *  If argument `syntax` is invalid
     */
    protected tokenizeSyntax(): undefined;
}
export default Argument;