/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { PipeTransform } from '@angular/core';
/**
 * @ngModule CommonModule
 * @description
 *
 * Uses the function {@link formatNumber} to format a number according to locale rules.
 *
 * Formats a number as text. Group sizing and separator and other locale-specific
 * configurations are based on the locale.
 *
 * ### Example
 *
 * {@example common/pipes/ts/number_pipe.ts region='NumberPipe'}
 *
 *
 */
export declare class DecimalPipe implements PipeTransform {
    private _locale;
    constructor(_locale: string);
    /**
     * @param value a number to be formatted.
     * @param digitsInfo a `string` which has a following format: <br>
     * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.
     *   - `minIntegerDigits` is the minimum number of integer digits to use. Defaults to `1`.
     *   - `minFractionDigits` is the minimum number of digits after the decimal point. Defaults to
     * `0`.
     *   - `maxFractionDigits` is the maximum number of digits after the decimal point. Defaults to
     * `3`.
     * @param locale a `string` defining the locale to use (uses the current {@link LOCALE_ID} by
     * default).
     */
    transform(value: any, digitsInfo?: string, locale?: string): string | null;
}
/**
 * @ngModule CommonModule
 * @description
 *
 * Uses the function {@link formatPercent} to format a number as a percentage according
 * to locale rules.
 *
 * ### Example
 *
 * {@example common/pipes/ts/percent_pipe.ts region='PercentPipe'}
 *
 *
 */
export declare class PercentPipe implements PipeTransform {
    private _locale;
    constructor(_locale: string);
    /**
     *
     * @param value a number to be formatted as a percentage.
     * @param digitsInfo see {@link DecimalPipe} for more details.
     * @param locale a `string` defining the locale to use (uses the current {@link LOCALE_ID} by
   * default).
     */
    transform(value: any, digitsInfo?: string, locale?: string): string | null;
}
/**
 * @ngModule CommonModule
 * @description
 *
 * Uses the functions {@link getCurrencySymbol} and {@link formatCurrency} to format a
 * number as currency using locale rules.
 *
 * ### Example
 *
 * {@example common/pipes/ts/currency_pipe.ts region='CurrencyPipe'}
 *
 *
 */
export declare class CurrencyPipe implements PipeTransform {
    private _locale;
    constructor(_locale: string);
    /**
     *
     * @param value a number to be formatted as currency.
     * @param currencyCodeis the [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) currency code,
     * such as `USD` for the US dollar and `EUR` for the euro.
     * @param display indicates whether to show the currency symbol, the code or a custom value:
     *   - `code`: use code (e.g. `USD`).
     *   - `symbol`(default): use symbol (e.g. `$`).
     *   - `symbol-narrow`: some countries have two symbols for their currency, one regular and one
     *     narrow (e.g. the canadian dollar CAD has the symbol `CA$` and the symbol-narrow `$`).
     *   - `string`: use this value instead of a code or a symbol.
     *   - boolean (deprecated from v5): `true` for symbol and false for `code`.
     *   If there is no narrow symbol for the chosen currency, the regular symbol will be used.
     * @param digitsInfo see {@link DecimalPipe} for more details.
     * @param locale a `string` defining the locale to use (uses the current {@link LOCALE_ID} by
     * default).
     */
    transform(value: any, currencyCode?: string, display?: 'code' | 'symbol' | 'symbol-narrow' | string | boolean, digitsInfo?: string, locale?: string): string | null;
}