import getopts from 'getopts';
import { CommandArg, CommandFlag, GlobalFlagHandler, CommandConstructorContract } from '../Contracts';
/**
 * The job of the parser is to parse the command line values by taking
 * the command `args`, `flags` and `globalFlags` into account.
 */
export declare class Parser {
    private registeredFlags;
    constructor(registeredFlags: {
        [name: string]: CommandFlag & {
            handler: GlobalFlagHandler;
        };
    });
    /**
     * Validate all the flags against the flags registered by the command
     * or as global flags and disallow unknown flags.
     */
    private scanForUnknownFlags;
    /**
     * Processes ace command flag to set the options for `getopts`.
     * We just define the `alias` with getopts coz their default,
     * string and boolean options produces the behavior we don't
     * want.
     */
    private preProcessFlag;
    /**
     * Casts a flag value to a boolean. The casting logic is driven
     * by the behavior of "getopts"
     */
    private castToBoolean;
    /**
     * Cast the value to a string. The casting logic is driven
     * by the behavior of "getopts"
     *
     * - Convert numbers to string
     * - Do not convert boolean to a string, since a flag without a value
     *   gets a boolean value, which is invalid
     */
    private castToString;
    /**
     * Cast value to an array of string. The casting logic is driven
     * by the behavior of "getopts"
     *
     * - Numeric values are converted to string of array
     * - A string value is splitted by comma and trimmed.
     * - An array is casted to an array of string values
     */
    private castToArray;
    /**
     * Cast value to an array of numbers. The casting logic is driven
     * by the behavior of "getopts".
     *
     * - Numeric values are wrapped to an array.
     * - String is splitted by comma and each value is casted to a number
     * - Each array value is casted to a number.
     */
    private castToNumArray;
    /**
     * Cast value to a number. The casting logic is driven
     * by the behavior of "getopts"
     *
     * - Boolean values are not allowed
     * - A string is converted to a number
     */
    private castToNumer;
    /**
     * Casts value of a flag to it's expected data type. These values
     * are then later validated to ensure that casting was successful.
     */
    processFlag(flag: CommandFlag, parsed: getopts.ParsedOptions, command?: CommandConstructorContract): void;
    /**
     * Validates the value to ensure that values are defined for
     * required arguments.
     */
    validateArg(arg: CommandArg, index: number, parsed: getopts.ParsedOptions, command: CommandConstructorContract): void;
    /**
     * Parses argv and executes the command and global flags handlers
     */
    parse(argv: string[], command?: CommandConstructorContract): getopts.ParsedOptions;
}