import { Fraction } from 'fraction.js';
import { Unit } from './Unit';
import { Quantity } from './Quantity';
export declare const TYPE_TAG = "__unitlib_type";
export declare const UNIT_TYPE = "Unit";
export declare const QUANTITY_TYPE = "Quantity";
export declare const isUnit: (x: unknown) => x is Unit<any, any, any>;
export declare const isQuantity: (x: unknown) => x is Quantity<any, any, any>;
export interface BaseUnitDefinition {
}
export interface FactorDefinition {
    mul: number;
    base: number;
    exp: Fraction;
}
export interface DerivedUnitDefinition {
}
export type RoundingStrategy = 'down' | 'up' | 'toward-zero' | 'away-from-zero' | 'to-even' | 'to-odd' | 'stochastic' | 'half-down' | 'half-up' | 'half-toward-zero' | 'half-away-from-zero' | 'half-to-even' | 'half-to-odd' | 'half-random';
export interface Compactness {
    spaceAfterNumericPart?: boolean;
    spacesAroundDivision?: boolean;
    spacesAroundMultiplication?: boolean;
}
export interface NumberFormatOptions {
    fancyUnicode?: boolean;
    allowNegativeZero?: boolean;
    fractionalPartSeparator?: string;
    decimalPlaces?: number;
    roundingStrategy?: RoundingStrategy;
    digitGroupSeparator?: string;
    digitGroupLength?: number;
}
export interface UnitFormatOptions extends NumberFormatOptions {
    compact?: boolean | Compactness;
    forceExponential?: boolean;
    useNegativeExponents?: boolean;
    omitDenominatorParens?: boolean;
}
export interface QuantityFormatOptions extends UnitFormatOptions {
}
export type UnitFormatExponentPart = {
    type: 'exponent';
    string: string;
    fraction: Fraction;
    number: number;
};
export type UnitFormatUnitPart = {
    type: 'unit';
    string: string;
    prefix: string;
    baseUnit: string;
    exponent?: UnitFormatExponentPart;
    denominator?: true;
};
export type UnitFormatPart = UnitFormatExponentPart | UnitFormatUnitPart | {
    type: 'parens';
    string: string;
    contents: UnitFormatPart[];
} | {
    type: 'multiplicator';
    string: string;
    number: number;
} | {
    type: 'base';
    string: string;
    number: number;
} | {
    type: 'multiplicationSign';
    string: string;
} | {
    type: 'divisionSign';
    string: string;
};