import { InjectionToken, InjectOptions, Provider, Type } from '@angular/core';
import { DIControl } from 'di-controls/controls';
export declare const DI_HOST_CONTROL: InjectionToken<DIControl<unknown>>;
/**
 * Returns provider that can be used to provide host control. You can use it in the `providers` section
 * of your `@Component` or `@Directive`.
 *
 * ```ts {2} fileName="custom-control.component.ts"
 * @Component({
 * 	providers: [provideHostControl(CustomControlComponent)],
 * })
 * export class CustomControlComponent extends DIControl<string> {
 * 		constructor() {
 * 			super();
 * 		}
 * 	}
 * ```
 *
 * @param useExisting - The `@Component` or `@Directive` class that should be used as a host control.
 */
export declare function provideHostControl<T extends DIControl<any>>(useExisting: Type<T>): Provider;
/**
 * Injects host control. You can use it in the constructor of your `@Component` or `@Directive`.
 *
 * @param options - Options that can be used to configure injection.
 */
export declare function injectHostControl<T, C extends DIControl<T> = DIControl<T>>(): C;
export declare function injectHostControl<T, C extends DIControl<T> = DIControl<T>>(options?: InjectOptions & {
    optional?: false;
}): C;
export declare function injectHostControl<T, C extends DIControl<T> = DIControl<T>>(options: InjectOptions): C | null;