import { DateRangeType } from '../Types';
import 'dayjs/locale/zh-cn';
export declare const identity: <T>(x: T) => T;
export declare const chunks: <T>(array: ReadonlyArray<T>, size: number) => T[][];
export declare const combine: (...args: any[]) => string;
export declare const getDaysInMonth: (date: Date) => Date[];
export declare const isStartOfRange: ({ startDate }: DateRangeType, day: Date) => boolean;
export declare const isEndOfRange: ({ endDate }: DateRangeType, day: Date) => boolean;
export declare const inDateRange: ({ startDate, endDate }: DateRangeType, day: Date) => boolean;
export declare const isRangeSameDay: ({ startDate, endDate }: DateRangeType) => boolean;
type Falsy = false | null | undefined | 0 | '';
export declare const parseOptionalDate: (date: Date | string | Falsy, defaultValue: Date) => Date;
export declare const formatDate: (props: {
    day?: number | Date;
    isCN?: boolean;
    needTime?: boolean;
}) => string;
export declare const splitSign: (isCN: boolean) => string;
export {};