import { MetaPipe, PipeType, PipeAlias, PipeClass, FactoryPipe, FunctionalPipe } from './declarations';
/**
 * Define a new middleware for the pipeline.
 *
 * @param module - The pipe module to add to the pipeline.
 * @param options - Additional options for the middleware.
 * @returns The metadata for the middleware.
 */
export declare const defineMiddleware: <T = unknown, R = T, Args extends any[] = any[]>(module: PipeType<T, R, Args>, options?: Omit<MetaPipe<T, R, Args>, "module">) => MetaPipe<T, R, Args>;
/**
 * Check if the value is a string.
 *
 * @param value - The value to check.
 * @returns `true` if the value is an string, otherwise `false`.
 */
export declare const isString: (value: unknown) => value is string;
/**
 * Check if the value is a function.
 *
 * @param value - The value to check.
 * @returns `true` if the value is a function, otherwise `false`.
 */
export declare const isFunction: <ClassType = Function>(value: unknown) => value is ClassType;
/**
 * Checks if the given value is a constructor function.
 *
 * @param value - The value to be checked.
 * @returns True if the value is a constructor function, false otherwise.
 */
export declare const isConstructor: <ClassType = any>(value: unknown) => value is new (...args: any[]) => ClassType;
/**
 * Check if the meta pipe is a function pipe.
 *
 * @param metaPipe - The meta pipe to check.
 * @returns `true` if the meta pipe is a function pipe, otherwise `false`.
 */
export declare const isFunctionPipe: <T = unknown, R = T, Args extends any[] = any[]>(metaPipe: MetaPipe<T, R, Args>) => metaPipe is {
    module: FunctionalPipe<T, R>;
};
/**
 * Check if the meta pipe is an alias pipe.
 *
 * @param metaPipe - The meta pipe to check.
 * @returns `true` if the meta pipe is an alias pipe, otherwise `false`.
 */
export declare const isAliasPipe: <T = unknown, R = T, Args extends any[] = any[]>(metaPipe: MetaPipe<T, R, Args>) => metaPipe is {
    module: PipeAlias;
};
/**
 * Check if the meta pipe is a class pipe.
 *
 * @param metaPipe - The meta pipe to check.
 * @returns `true` if the meta pipe is a class pipe, otherwise `false`.
 */
export declare const isClassPipe: <T = unknown, R = T, Args extends any[] = any[]>(metaPipe: MetaPipe<T, R, Args>) => metaPipe is {
    module: PipeClass<T, R, Args>;
};
/**
 * Check if the meta pipe is a factory pipe.
 *
 * @param metaPipe - The meta pipe to check.
 * @returns `true` if the meta pipe is a factory pipe, otherwise `false`.
 */
export declare const isFactoryPipe: <T = unknown, R = T, Args extends any[] = any[]>(metaPipe: MetaPipe<T, R, Args>) => metaPipe is {
    module: FactoryPipe<T, R, Args>;
};