/**
 * ISO8601-like measure of a duration.  Does not include
 * any concept of being relative to any specific date.
 */
export interface Duration {
    day?: number;
    hour?: number;
    minute?: number;
    month?: number;
    second?: number;
    week?: number;
    year?: number;
}
/**
 * A duration parsed from text, which includes the extracted
 * (serialized) duration text.
 */
export interface DurationWithText extends Duration {
    text: string;
}
/**
 * ISO-8601 designator for a duration value.
 */
export type DurationDesignator = "Y" | "M" | "W" | "D" | "T" | "H" | "S";
export declare const DURATION_DESIGNATORS: readonly DurationDesignator[];
export declare const DURATION_TIME_DESIGNATORS: readonly DurationDesignator[];
export declare const DURATION_DATE_DESIGNATORS: readonly DurationDesignator[];
/**
 * Map between {@link DurationDesignator} and {@link Duration} property name.
 * Does not include `M`, which is ambiguous, nor `T` which does not
 * correspond to a property.
 */
export declare const DURATION_KEY_BY_DESIGNATOR: Readonly<{
    readonly Y: "year";
    readonly D: "day";
    readonly H: "hour";
    readonly S: "second";
    readonly W: "week";
}>;
/**
 * Parse an ISO-8601 duration from the given text.  If the text contains
 * extra non-duration characters after, will only throw an error if they
 * would produce an ambiguous result, or could indicate an incomplete
 * duration.
 * @throws {@link SyntaxError}
 * For text which is not a valid ISO-8601 duration.
 */
export declare const parseDuration: (text: string) => DurationWithText;
/**
 * Lookup table for the conversion of a {@link Duration} property
 * value to seconds.  Does not include `month` or `year`, which
 * have variable numbers of days.
 */
export declare const DURATION_KEY_SECONDS: Readonly<Required<Omit<Duration, "month" | "text" | "year">>>;
/**
 * Convert a given duration to an equivalent number of seconds.
 * @throws {@link RangeError}
 * If the duration contains `year` or `month`, which have variable
 * numbers of seconds, or if one of the duration properties has a
 * non-numeric value.
 */
export declare const secondsFromDuration: (duration: Partial<DurationWithText>) => number;
export declare const formatDuration: (duration: Duration) => string;
//# sourceMappingURL=duration.d.ts.map