import 'reflect-metadata';
import { Provider } from './provider';
/**
 * @private
 * any singleton registry
 */
export interface IContainer {
    /**
     * does the container have the
     * provided key
     * @param key the singleton key
     */
    has(key: string): boolean;
    /**
     * register a singleton
     * @param key the singleton key
     * @param value the singleton value
     */
    register<T = any>(key: string, provider: Provider<T>): void;
    /**
     * resolve a singleton
     * @param key the singleton key
     */
    resolve<T = any>(key: string): T | undefined;
}
/**
 * @private
 * a singleton container
 */
export declare class Container implements IContainer {
    protected readonly values: Map<string, any>;
    protected readonly providers: Map<string, Provider<any>>;
    has(key: string): boolean;
    register<T = any>(key: string, provider: Provider<T>): void;
    resolve<T = any>(key: string): T | undefined;
    toString(): string;
}