import { AbstractControlDirective } from './abstract_control_directive';
import { ControlValueAccessor } from './control_value_accessor';
import { AsyncValidatorFn, ValidatorFn } from './validators';
/**
 * A base class that all control directive extend.
 * It binds a {@link Control} object to a DOM element.
 *
 * Used internally by Angular forms.
 *
 * @experimental
 */
export declare abstract class NgControl extends AbstractControlDirective {
    name: string;
    valueAccessor: ControlValueAccessor;
    readonly validator: ValidatorFn;
    readonly asyncValidator: AsyncValidatorFn;
    abstract viewToModelUpdate(newValue: any): void;
}
