export interface RelativeGrammarMatch {
    year?: number;
    month?: number;
    day?: number;
    resolve?: (reference: {
        year: number;
        month: number;
        day: number;
        dayOfWeek: number;
    }) => {
        year: number;
        month: number;
        day: number;
    };
}
export interface RelativeGrammar {
    language: string;
    matchers: Array<(input: string) => RelativeGrammarMatch | null>;
}
export declare function registerRelativeGrammar(grammar: RelativeGrammar): void;
export declare function tryRegisteredGrammar(language: string, input: string, reference: {
    year: number;
    month: number;
    day: number;
    dayOfWeek: number;
}): unknown | null;
export declare function listRegisteredGrammars(): string[];