/**
 * @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
 *
 * Transforms a number into a string,
 * formatted according to locale rules that determine group sizing and
 * separator, decimal-point character, and other locale-specific
 * configurations.
 *
 * If no parameters are specified, the function rounds off to the nearest value using this
 * [rounding method](https://en.wikibooks.org/wiki/Arithmetic/Rounding).
 * The behavior differs from that of the JavaScript ```Math.round()``` function.
 * In the following case for example, the pipe rounds down where
 * ```Math.round()``` rounds up:
 *
 * ```html
 * -2.5 | number:'1.0-0'
 * > -3
 * Math.round(-2.5)
 * > -2
 * ```
 *
 * @see `formatNumber()`
 *
 * @usageNotes
 * The following code shows how the pipe transforms numbers
 * into text strings, according to various format specifications,
 * where the caller's default locale is `en-US`.
 *
 * ### Example
 *
 * <code-example path="common/pipes/ts/number_pipe.ts" region='NumberPipe'></code-example>
 *
 */
export declare class DecimalPipe implements PipeTransform {
    private _locale;
    constructor(_locale: string);
    /**
     * @param value The number to be formatted.
     * @param digitsInfo Decimal representation options, specified by a string
     * in the following format:<br>
     * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.
     *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.
     * Default is `1`.
     *   - `minFractionDigits`: The minimum number of digits after the decimal point.
     * Default is `0`.
     *   - `maxFractionDigits`: The maximum number of digits after the decimal point.
     * Default is `3`.
     * @param locale A locale code for the locale format rules to use.
     * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.
     * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).
     */
    transform(value: any, digitsInfo?: string, locale?: string): string | null;
}
/**
 * @ngModule CommonModule
 * @description
 *
 * Transforms a number to a percentage
 * string, formatted according to locale rules that determine group sizing and
 * separator, decimal-point character, and other locale-specific
 * configurations.
 *
 * @see `formatPercent()`
 *
 * @usageNotes
 * The following code shows how the pipe transforms numbers
 * into text strings, according to various format specifications,
 * where the caller's default locale is `en-US`.
 *
 * <code-example path="common/pipes/ts/percent_pipe.ts" region='PercentPipe'></code-example>
 *
 *
 */
export declare class PercentPipe implements PipeTransform {
    private _locale;
    constructor(_locale: string);
    /**
     *
     * @param value The number to be formatted as a percentage.
     * @param digitsInfo Decimal representation options, specified by a string
     * in the following format:<br>
     * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.
     *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.
     * Default is `1`.
     *   - `minFractionDigits`: The minimum number of digits after the decimal point.
     * Default is `0`.
     *   - `maxFractionDigits`: The maximum number of digits after the decimal point.
     * Default is `3`.
     * @param locale A locale code for the locale format rules to use.
     * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.
     * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).
     */
    transform(value: any, digitsInfo?: string, locale?: string): string | null;
}
/**
 * @ngModule CommonModule
 * @description
 *
 * Transforms a number to a currency string, formatted according to locale rules
 * that determine group sizing and separator, decimal-point character,
 * and other locale-specific configurations.
 *
 * @see `getCurrencySymbol()`
 * @see `formatCurrency()`
 *
 * @usageNotes
 * The following code shows how the pipe transforms numbers
 * into text strings, according to various format specifications,
 * where the caller's default locale is `en-US`.
 *
 * <code-example path="common/pipes/ts/currency_pipe.ts" region='CurrencyPipe'></code-example>
 *
 *
 */
export declare class CurrencyPipe implements PipeTransform {
    private _locale;
    constructor(_locale: string);
    /**
     *
     * @param value The number to be formatted as currency.
     * @param currencyCode 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 The format for the currency indicator. One of the following:
     *   - `code`: Show the code (such as `USD`).
     *   - `symbol`(default): Show the symbol (such as `$`).
     *   - `symbol-narrow`: Use the narrow symbol for locales that have two symbols for their
     * currency.
     * For example, the Canadian dollar CAD has the symbol `CA$` and the symbol-narrow `$`. If the
     * locale has no narrow symbol, uses the standard symbol for the locale.
     *   - String: Use the given string value instead of a code or a symbol.
     *   - Boolean (marked deprecated in v5): `true` for symbol and false for `code`.
     *
     * @param digitsInfo Decimal representation options, specified by a string
     * in the following format:<br>
     * <code>{minIntegerDigits}.{minFractionDigits}-{maxFractionDigits}</code>.
     *   - `minIntegerDigits`: The minimum number of integer digits before the decimal point.
     * Default is `1`.
     *   - `minFractionDigits`: The minimum number of digits after the decimal point.
     * Default is `0`.
     *   - `maxFractionDigits`: The maximum number of digits after the decimal point.
     * Default is `3`.
     * If not provided, the number will be formatted with the proper amount of digits,
     * depending on what the [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) specifies.
     * For example, the Canadian dollar has 2 digits, whereas the Chilean peso has none.
     * @param locale A locale code for the locale format rules to use.
     * When not supplied, uses the value of `LOCALE_ID`, which is `en-US` by default.
     * See [Setting your app locale](guide/i18n#setting-up-the-locale-of-your-app).
     */
    transform(value: any, currencyCode?: string, display?: 'code' | 'symbol' | 'symbol-narrow' | string | boolean, digitsInfo?: string, locale?: string): string | null;
}