import { InjectionToken, Provider } from '@angular/core';
import { VudDateStruct } from './datepicker.model';
import * as i0 from "@angular/core";
export declare function VUD_DATEPICKER_PARSER_FORMATTER_FACTORY(): VudDateParserFormatterDefault;
/**
 * Converts between the internal `VudDateStruct` model presentation and a `string` that is displayed in the input element.
 */
export declare abstract class VudDateParserFormatter {
    /**
     * When user types something in the input this method attempts to parse it into a `VudDateStruct` object.
     * `null` must be returned if the value can't be parsed.
     */
    abstract parse(value: string): VudDateStruct | null;
    /**
     * When users enters a valid date (either via keyboard or mouse click) this method reformats it into a preferred format.
     * An empty string must be returned if the given date is `null`.
     */
    abstract format(date: VudDateStruct | null): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<VudDateParserFormatter, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<VudDateParserFormatter>;
}
export type VudDatepickerFormats = {
    [locale: string]: {
        input: string[];
        output: string;
    };
};
export declare const VUD_DEFAULT_DATEPICKER_FORMATS: VudDatepickerFormats;
export declare const VUD_DATE_PARSER_FORMATTER_CONFIG: InjectionToken<VudDatepickerFormats>;
export declare function extendVudDateParserFormatter(formats: VudDatepickerFormats): Provider;
export declare class VudDateParserFormatterDefault extends VudDateParserFormatter {
    /** @ignore */
    private readonly locale;
    /** @ignore */
    private readonly formats;
    parse(value: string): VudDateStruct | null;
    format(date: VudDateStruct): string;
    private dateFormatToRegexp;
    private addYearPadding;
    private printUnknownLocaleWarning;
    static ɵfac: i0.ɵɵFactoryDeclaration<VudDateParserFormatterDefault, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<VudDateParserFormatterDefault>;
}