import { Kind, Type, DigitList, String } from '..';
type _$hexToDigitMap = {
    '0': ['0'];
    '1': ['1'];
    '2': ['2'];
    '3': ['3'];
    '4': ['4'];
    '5': ['5'];
    '6': ['6'];
    '7': ['7'];
    '8': ['8'];
    '9': ['9'];
    a: ['1', '0'];
    b: ['1', '1'];
    c: ['1', '2'];
    d: ['1', '3'];
    e: ['1', '4'];
    f: ['1', '5'];
    A: ['1', '0'];
    B: ['1', '1'];
    C: ['1', '2'];
    D: ['1', '3'];
    E: ['1', '4'];
    F: ['1', '5'];
};
/**
 * `_$fromHex` is a type-level function that takes in a string `T` representing
 * a hexadecimal number, and returns a decimal number.
 *
 * @template T - The string to convert.
 *
 * @example
 * ```ts
 * import { NaturalNumber } from "hkt-toolbelt";
 *
 * type Result = NaturalNumber._$fromHex<'fff'>; // 4095
 * ```
 */
export type _$fromHex<T extends string, LIST = String._$toList<T>> = DigitList._$toNumber<DigitList._$fromHex<Type._$cast<{
    [K in keyof LIST]: _$hexToDigitMap[Type._$cast<LIST[K], keyof _$hexToDigitMap>];
}, DigitList.DigitList[]>>>;
/**
 * `FromHex` is a type-level function that takes in a string `T` representing
 * a hexadecimal number, and returns a decimal number.
 *
 * @template T - The string to convert.
 *
 * @example
 * ```ts
 * import { $, NaturalNumber } from "hkt-toolbelt";
 *
 * type Result = $<NaturalNumber.FromHex, 'fff'>; // 4095
 * ```
 */
export interface FromHex extends Kind.Kind {
    f(x: Type._$cast<this[Kind._], string>): _$fromHex<typeof x>;
}
/**
 * Given a hexadecimal string, return the corresponding decimal number.
 *
 * @param {string} x - The hexadecimal string to convert.
 *
 * @example
 * ```ts
 * import { NaturalNumber } from "hkt-toolbelt";
 *
 * const result = NaturalNumber.fromHex('fff')
 * //    ^? 4095
 * ```
 */
export declare const fromHex: Kind._$reify<FromHex>;
export {};