/**
 * @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 { AfterContentInit, QueryList, TemplateRef, ViewContainerRef } from '@angular/core';
import { NgLocalization } from '../localization';
/**
 * `ngPlural` is an i18n directive that displays DOM sub-trees that match the switch expression
 * value, or failing that, DOM sub-trees that match the switch expression's pluralization category.
 *
 * To use this directive, you must provide an extension of `NgLocalization` that maps values to
 * category names. You then define a container element that sets the `[ngPlural]` attribute to a
 * switch expression.
 *    - Inner elements defined with an `[ngPluralCase]` attribute will display based on their
 * expression.
 *    - If `[ngPluralCase]` is set to a value starting with `=`, it will only display if the value
 * matches the switch expression exactly.
 *    - Otherwise, the view will be treated as a "category match", and will only display if exact
 * value matches aren't found and the value maps to its category using the `getPluralCategory`
 * function provided.
 *
 * ```typescript
 * class MyLocalization extends NgLocalization {
 *    getPluralCategory(value: any) {
 *       if(value < 5) {
 *          return 'few';
 *       }
 *    }
 * }
 *
 * @Component({
 *    selector: 'app',
 *    providers: [{provide: NgLocalization, useClass: MyLocalization}]
 * })
 * @View({
 *   template: `
 *     <p>Value = {{value}}</p>
 *     <button (click)="inc()">Increment</button>
 *
 *     <div [ngPlural]="value">
 *       <template ngPluralCase="=0">there is nothing</template>
 *       <template ngPluralCase="=1">there is one</template>
 *       <template ngPluralCase="few">there are a few</template>
 *       <template ngPluralCase="other">there is some number</template>
 *     </div>
 *   `,
 *   directives: [NgPlural, NgPluralCase]
 * })
 * export class App {
 *   value = 'init';
 *
 *   inc() {
 *     this.value = this.value === 'init' ? 0 : this.value + 1;
 *   }
 * }
 *
 * ```
 * @experimental
 */
export declare class NgPluralCase {
    value: string;
    constructor(value: string, template: TemplateRef<Object>, viewContainer: ViewContainerRef);
}
/**
 * @experimental
 */
export declare class NgPlural implements AfterContentInit {
    private _localization;
    private _switchValue;
    private _activeView;
    private _caseViews;
    cases: QueryList<NgPluralCase>;
    constructor(_localization: NgLocalization);
    ngPlural: number;
    ngAfterContentInit(): void;
}