import { RomanNumeral } from './roman-numeral';
import { Scale } from '../scale';
import { MatchingRule, Rule } from './rule';
export declare enum ExpansionType {
    /**
     * Expansion is inserted before the target
     */
    PREFIX = 0,
    /**
     * Expansion spans from source to target and cannot be used with other expansions
     */
    FULL = 1
}
export type ExpansionRule = Rule & {
    type: ExpansionType;
    expansion: MatchingRule[];
} & ({
    type: ExpansionType.FULL;
} | {
    type: ExpansionType.PREFIX;
    priority: number;
});
/**
 * Expansions consist of elaborations beyond basic progressions
 * I.e. I - I6 could be expanded to be I - V64 - I6
 *
 * TODO chainable? - e.g. (V6/V - (I64 - V))
 */
export declare namespace Expansion {
    const basicInversions: ExpansionRule[];
    const dominantInversions: ({
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
        priority?: undefined;
    } | {
        type: ExpansionType;
        target: MatchingRule;
        expansion: MatchingRule[];
        source?: undefined;
        priority?: undefined;
    } | {
        type: ExpansionType;
        priority: number;
        target: MatchingRule;
        expansion: MatchingRule[];
        source?: undefined;
    })[];
    const subdominant: {
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const cadential64: {
        type: ExpansionType;
        priority: number;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const submediant: {
        type: ExpansionType;
        source: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const subdominantSevenths: {
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const tonicSubstitutes: {
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const secondaryDominant: {
        type: ExpansionType;
        priority: number;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const mediant: {
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const sequences: {
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const leadingToneSevenths: {
        type: ExpansionType;
        priority: number;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const otherSeventhChords: {
        type: ExpansionType;
        source: MatchingRule;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const secondaryDominants: {
        type: ExpansionType;
        priority: number;
        target: MatchingRule;
        expansion: MatchingRule[];
    }[];
    const defaultExpansions: ExpansionRule[];
    function matchingExpansions(scale: Scale, previous: RomanNumeral, option: RomanNumeral, expansions?: ExpansionRule[]): Generator<RomanNumeral[]>;
}