import { ViewContainerRef, TemplateRef } from 'angular2/core';
/**
 * Adds or removes DOM sub-trees when their match expressions match the switch expression.
 *
 * Elements within `NgSwitch` but without `NgSwitchWhen` or `NgSwitchDefault` directives will be
 * preserved at the location as specified in the template.
 *
 * `NgSwitch` simply inserts nested elements based on which match expression matches the value
 * obtained from the evaluated switch expression. In other words, you define a container element
 * (where you place the directive with a switch expression on the
 * **`[ngSwitch]="..."` attribute**), define any inner elements inside of the directive and
 * place a `[ngSwitchWhen]` attribute per element.
 *
 * The `ngSwitchWhen` property is used to inform `NgSwitch` which element to display when the
 * expression is evaluated. If a matching expression is not found via a `ngSwitchWhen` property
 * then an element with the `ngSwitchDefault` attribute is displayed.
 *
 * ### Example ([live demo](http://plnkr.co/edit/DQMTII95CbuqWrl3lYAs?p=preview))
 *
 * ```typescript
 * @Component({selector: 'app'})
 * @View({
 *   template: `
 *     <p>Value = {{value}}</p>
 *     <button (click)="inc()">Increment</button>
 *
 *     <div [ngSwitch]="value">
 *       <p *ngSwitchWhen="'init'">increment to start</p>
 *       <p *ngSwitchWhen="0">0, increment again</p>
 *       <p *ngSwitchWhen="1">1, increment again</p>
 *       <p *ngSwitchWhen="2">2, stop incrementing</p>
 *       <p *ngSwitchDefault>&gt; 2, STOP!</p>
 *     </div>
 *
 *     <!-- alternate syntax -->
 *
 *     <p [ngSwitch]="value">
 *       <template ngSwitchWhen="init">increment to start</template>
 *       <template [ngSwitchWhen]="0">0, increment again</template>
 *       <template [ngSwitchWhen]="1">1, increment again</template>
 *       <template [ngSwitchWhen]="2">2, stop incrementing</template>
 *       <template ngSwitchDefault>&gt; 2, STOP!</template>
 *     </p>
 *   `,
 *   directives: [NgSwitch, NgSwitchWhen, NgSwitchDefault]
 * })
 * export class App {
 *   value = 'init';
 *
 *   inc() {
 *     this.value = this.value === 'init' ? 0 : this.value + 1;
 *   }
 * }
 *
 * bootstrap(App).catch(err => console.error(err));
 * ```
 */
export declare class NgSwitch {
    private _switchValue;
    private _useDefault;
    private _valueViews;
    private _activeViews;
    ngSwitch: any;
}
/**
 * Insert the sub-tree when the `ngSwitchWhen` expression evaluates to the same value as the
 * enclosing switch expression.
 *
 * If multiple match expression match the switch expression value, all of them are displayed.
 *
 * See {@link NgSwitch} for more details and example.
 */
export declare class NgSwitchWhen {
    private _switch;
    constructor(viewContainer: ViewContainerRef, templateRef: TemplateRef, ngSwitch: NgSwitch);
    ngSwitchWhen: any;
}
/**
 * Default case statements are displayed when no match expression matches the switch expression
 * value.
 *
 * See {@link NgSwitch} for more details and example.
 */
export declare class NgSwitchDefault {
    constructor(viewContainer: ViewContainerRef, templateRef: TemplateRef, sswitch: NgSwitch);
}