type DurationSymbol = typeof durationSymbols[number];
/**
 * Type predicate.
 * @param candidate The candidate to test.
 */
declare function isDurationSymbol(candidate: any): candidate is DurationSymbol;
/**
* All the Duration symbols.
*/
declare const durationSymbols: readonly ["sec", "min", "hr"];

/**
 * The object representation of a measurement.
 *
 * @template Unit The type of the unit of measurement.
 * @template Value The type of the value of the measurement.
 */
type Measurement$1<Unit extends string, Value extends number = number> = Number & {
    readonly value: Value;
    readonly unit: Unit;
};

/**
 * Represents a dimension measurement.
 * @template Units - The units of the dimension.
 */
type Measurement<Units extends string, Unit extends Units = Units, Value extends number = number> = Measurement$1<Unit, Value> & Alternatives<Units>;

/**
 * Represents a collection of alternative measurements for different units.
 *
 * @template Units - The string literal type representing the available units.
 */
type Alternatives<Units extends string> = {
    readonly [unit in Units]: Measurement<Units, unit, number>;
};

/**
 * A dimension is a map of units to creation functions.
 * Each function takes a number value and returns a
 * dimension measurement.
 * @template Units - The units of the dimension.
 */
type Dimension<Units extends string> = {
    readonly [unit in Units]: (value: number) => Measurement<Units>;
};

type Duration = Measurement<DurationSymbol>;
declare const duration: Dimension<"sec" | "min" | "hr">;
declare const seconds: (value: number) => Measurement<"sec" | "min" | "hr">;
declare const minutes: (value: number) => Measurement<"sec" | "min" | "hr">;
declare const hours: (value: number) => Measurement<"sec" | "min" | "hr">;

export { duration, durationSymbols, hours, isDurationSymbol, minutes, seconds };
export type { Duration, DurationSymbol };