import { Type } from '../common/cli-types';
import { ProviderToken } from './providers';
/**
 * Metadata that describes an argument of a constructor that is injectable
 */
export interface InjectableArgDefinition {
    /**
     * Position of the argument in constructor's call signature
     */
    index: number;
    /**
     * Where the `@Inject()` decorator has been used it is the token provided into the decorator, else it is the argument's design type attained through reflection
     */
    injectToken: ProviderToken;
    optional: boolean;
}
/**
 * Determines whether a constructor has metadata that allows dependencies to be injected into it
 * @param constructor constructor
 */
export declare function hasInjectableArgs(constructor: Type<any>): boolean;
/**
 * Returns a constructor's metadata that describes its' arguments for dependency injection
 * @param constructor constructor
 */
export declare function getInjectablesArgs(constructor: Type<any>): InjectableArgDefinition[];
/**
 * Attains design metadata from the arguments of a constructor and attaches this metadata to the constructor, with sufficient details to allow dependencies to be
 * injected at a later stage
 * @param constructor constructor
 */
export declare function registerInjectablesArgs(constructor: Type<any>): void;