/**
 * @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 { ElementRef, Injector, OnDestroy, OnInit, Renderer } from '@angular/core';
import { ControlValueAccessor } from './control_value_accessor';
import { NgControl } from './ng_control';
export declare const RADIO_VALUE_ACCESSOR: any;
/**
 * Internal class used by Angular to uncheck radio buttons with the matching name.
 */
export declare class RadioControlRegistry {
    private _accessors;
    add(control: NgControl, accessor: RadioControlValueAccessor): void;
    remove(accessor: RadioControlValueAccessor): void;
    select(accessor: RadioControlValueAccessor): void;
    private _isSameGroup(controlPair, accessor);
}
/**
 * The accessor for writing a radio control value and listening to changes that is used by the
 * {@link NgModel}, {@link FormControlDirective}, and {@link FormControlName} directives.
 *
 *  ### Example
 *  ```
 *  @Component({
 *    template: `
 *      <input type="radio" name="food" [(ngModel)]="food" value="chicken">
 *      <input type="radio" name="food" [(ngModel)]="food" value="fish">
 *    `
 *  })
 *  class FoodCmp {
 *    food = 'chicken';
 *  }
 *  ```
 */
export declare class RadioControlValueAccessor implements ControlValueAccessor, OnDestroy, OnInit {
    private _renderer;
    private _elementRef;
    private _registry;
    private _injector;
    onChange: () => void;
    onTouched: () => void;
    name: string;
    formControlName: string;
    value: any;
    constructor(_renderer: Renderer, _elementRef: ElementRef, _registry: RadioControlRegistry, _injector: Injector);
    ngOnInit(): void;
    ngOnDestroy(): void;
    writeValue(value: any): void;
    registerOnChange(fn: (_: any) => {}): void;
    fireUncheck(value: any): void;
    registerOnTouched(fn: () => {}): void;
    private _checkName();
    private _throwNameError();
}