import Exceptional from "../util/Exceptional";
import Accidental from "./Accidental";
import Key from "./Key";
import Letter from "./Letter";
declare class KeySignature {
    private accidentals;
    private static RELATIVE_MAJOR_TO_MINOR_DISTANCE;
    static ORDER_OF_FLATS: Letter[];
    static ORDER_OF_SHARPS: Letter[];
    constructor(accidentals: Key[]);
    getAccidentalCount(): number;
    getAccidentalFor(letter: Letter): Exceptional<Accidental>;
    static getOrderOfFlats(count?: number): Letter[];
    static getOrderOfSharps(count?: number): Letter[];
    static getKeyFor(accidental: Accidental, count: number, quality: KeySignature.Quality): Exceptional<Key>;
    static fromAccidentals(accidental: Accidental, count: number): Exceptional<KeySignature>;
    static fromKey(key: Key, quality: KeySignature.Quality): KeySignature;
    toString(): string;
    getAccidentals(): Key[];
}
declare module KeySignature {
    class Quality {
        static size: number;
        private static _values;
        static MAJOR: Quality;
        static MINOR: Quality;
        private constructor();
        static values(): Quality[];
        ordinal(): number;
        static valueOf(qualityString: string): Quality;
        toString(): string;
    }
}
export default KeySignature;