/**
 * Type of the Inject decorator / constructor function.
 *
 * @stable
 */
export interface InjectDecorator {
    /**
     * @whatItDoes A parameter decorator that specifies a dependency.
     * @howToUse
     * ```
     * @Injectable()
     * class Car {
     *   constructor(@Inject("MyEngine") public engine:Engine) {}
     * }
     * ```
     *
     * @description
     * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='Inject'}
     *
     * When `@Inject()` is not present, {@link Injector} will use the type annotation of the
     * parameter.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='InjectWithoutDecorator'}
     *
     * @stable
     */
    (token: any): any;
    new (token: any): Inject;
}
/**
 * Type of the Inject metadata.
 *
 * @stable
 */
export interface Inject {
    token: any;
}
/**
 * Inject decorator and metadata.
 *
 * @stable
 * @Annotation
 */
export declare const Inject: InjectDecorator;
/**
 * Type of the Optional decorator / constructor function.
 *
 * @stable
 */
export interface OptionalDecorator {
    /**
     * @whatItDoes A parameter metadata that marks a dependency as optional.
     * {@link Injector} provides `null` if the dependency is not found.
     * @howToUse
     * ```
     * @Injectable()
     * class Car {
     *   constructor(@Optional() public engine:Engine) {}
     * }
     * ```
     *
     * @description
     * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='Optional'}
     *
     * @stable
     */
    (): any;
    new (): Optional;
}
/**
 * Type of the Optional metadata.
 *
 * @stable
 */
export interface Optional {
}
/**
 * Optional decorator and metadata.
 *
 * @stable
 * @Annotation
 */
export declare const Optional: OptionalDecorator;
/**
 * Type of the Injectable decorator / constructor function.
 *
 * @stable
 */
export interface InjectableDecorator {
    /**
     * @whatItDoes A marker metadata that marks a class as available to {@link Injector} for creation.
     * @howToUse
     * ```
     * @Injectable()
     * class Car {}
     * ```
     *
     * @description
     * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='Injectable'}
     *
     * {@link Injector} will throw an error when trying to instantiate a class that
     * does not have `@Injectable` marker, as shown in the example below.
     *
     * {@example core/di/ts/metadata_spec.ts region='InjectableThrows'}
     *
     * @stable
     */
    (): any;
    new (): Injectable;
}
/**
 * Type of the Injectable metadata.
 *
 * @stable
 */
export interface Injectable {
}
/**
 * Injectable decorator and metadata.
 *
 * @stable
 * @Annotation
 */
export declare const Injectable: InjectableDecorator;
/**
 * Type of the Self decorator / constructor function.
 *
 * @stable
 */
export interface SelfDecorator {
    /**
     * @whatItDoes Specifies that an {@link Injector} should retrieve a dependency only from itself.
     * @howToUse
     * ```
     * @Injectable()
     * class Car {
     *   constructor(@Self() public engine:Engine) {}
     * }
     * ```
     *
     * @description
     * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='Self'}
     *
     * @stable
     */
    (): any;
    new (): Self;
}
/**
 * Type of the Self metadata.
 *
 * @stable
 */
export interface Self {
}
/**
 * Self decorator and metadata.
 *
 * @stable
 * @Annotation
 */
export declare const Self: SelfDecorator;
/**
 * Type of the SkipSelf decorator / constructor function.
 *
 * @stable
 */
export interface SkipSelfDecorator {
    /**
     * @whatItDoes Specifies that the dependency resolution should start from the parent injector.
     * @howToUse
     * ```
     * @Injectable()
     * class Car {
     *   constructor(@SkipSelf() public engine:Engine) {}
     * }
     * ```
     *
     * @description
     * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='SkipSelf'}
     *
     * @stable
     */
    (): any;
    new (): SkipSelf;
}
/**
 * Type of the SkipSelf metadata.
 *
 * @stable
 */
export interface SkipSelf {
}
/**
 * SkipSelf decorator and metadata.
 *
 * @stable
 * @Annotation
 */
export declare const SkipSelf: SkipSelfDecorator;
/**
 * Type of the Host decorator / constructor function.
 *
 * @stable
 */
export interface HostDecorator {
    /**
     * @whatItDoes Specifies that an injector should retrieve a dependency from any injector until
     * reaching the host element of the current component.
     * @howToUse
     * ```
     * @Injectable()
     * class Car {
     *   constructor(@Host() public engine:Engine) {}
     * }
     * ```
     *
     * @description
     * For more details, see the {@linkDocs guide/dependency-injection "Dependency Injection Guide"}.
     *
     * ### Example
     *
     * {@example core/di/ts/metadata_spec.ts region='Host'}
     *
     * @stable
     */
    (): any;
    new (): Host;
}
/**
 * Type of the Host metadata.
 *
 * @stable
 */
export interface Host {
}
/**
 * Host decorator and metadata.
 *
 * @stable
 * @Annotation
 */
export declare const Host: HostDecorator;