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import { Middleware as BaseMiddleware } from "./types.d.ts";
export function compose<T1, U1, T2, U2>(  middleware: [BaseMiddleware<T1, U1>, BaseMiddleware<T2, U2>],): BaseMiddleware<T1 & T2, U1 & U2>;
export function compose<T1, U1, T2, U2, T3, U3>(  middleware: [    BaseMiddleware<T1, U1>,    BaseMiddleware<T2, U2>,    BaseMiddleware<T3, U3>,  ],): BaseMiddleware<T1 & T2 & T3, U1 & U2 & U3>;
export function compose<T1, U1, T2, U2, T3, U3, T4, U4>(  middleware: [    BaseMiddleware<T1, U1>,    BaseMiddleware<T2, U2>,    BaseMiddleware<T3, U3>,    BaseMiddleware<T4, U4>,  ],): BaseMiddleware<T1 & T2 & T3 & T4, U1 & U2 & U3 & U4>;
export function compose<T1, U1, T2, U2, T3, U3, T4, U4, T5, U5>(  middleware: [    BaseMiddleware<T1, U1>,    BaseMiddleware<T2, U2>,    BaseMiddleware<T3, U3>,    BaseMiddleware<T4, U4>,    BaseMiddleware<T5, U5>,  ],): BaseMiddleware<T1 & T2 & T3 & T4 & T5, U1 & U2 & U3 & U4 & U5>;
export function compose<T1, U1, T2, U2, T3, U3, T4, U4, T5, U5, T6, U6>(  middleware: [    BaseMiddleware<T1, U1>,    BaseMiddleware<T2, U2>,    BaseMiddleware<T3, U3>,    BaseMiddleware<T4, U4>,    BaseMiddleware<T5, U5>,    BaseMiddleware<T6, U6>,  ],): BaseMiddleware<T1 & T2 & T3 & T4 & T5 & T6, U1 & U2 & U3 & U4 & U5 & U6>;
export function compose<  T1,  U1,  T2,  U2,  T3,  U3,  T4,  U4,  T5,  U5,  T6,  U6,  T7,  U7,>(  middleware: [    BaseMiddleware<T1, U1>,    BaseMiddleware<T2, U2>,    BaseMiddleware<T3, U3>,    BaseMiddleware<T4, U4>,    BaseMiddleware<T5, U5>,    BaseMiddleware<T6, U6>,    BaseMiddleware<T7, U7>,  ],): BaseMiddleware<  T1 & T2 & T3 & T4 & T5 & T6 & T7,  U1 & U2 & U3 & U4 & U5 & U6 & U7>;
export function compose<  T1,  U1,  T2,  U2,  T3,  U3,  T4,  U4,  T5,  U5,  T6,  U6,  T7,  U7,  T8,  U8,>(  middleware: [    BaseMiddleware<T1, U1>,    BaseMiddleware<T2, U2>,    BaseMiddleware<T3, U3>,    BaseMiddleware<T4, U4>,    BaseMiddleware<T5, U5>,    BaseMiddleware<T6, U6>,    BaseMiddleware<T7, U7>,    BaseMiddleware<T8, U8>,  ],): BaseMiddleware<  T1 & T2 & T3 & T4 & T5 & T6 & T7 & T8,  U1 & U2 & U3 & U4 & U5 & U6 & U7 & U8>;
export function compose<T>(  middleware: Array<Middleware<T>>,): ComposedMiddleware<T>;
export function compose(middleware: Function[]) {  return function (context: any, next?: Next) {    // last called middleware #    let index = -1;
    function dispatch(i: number): Promise<any> {      if (i <= index) {        return Promise.reject(new Error("next() called multiple times"));      }      index = i;      let fn = middleware[i];      if (i === middleware.length && next) fn = next;      if (!fn) return Promise.resolve();      try {        return Promise.resolve(fn(context, dispatch.bind(null, i + 1)));      } catch (err) {        return Promise.reject(err);      }    }
    return dispatch(0);  };}
export type Next = () => Promise<any>;export type Middleware<T> = (context: T, next: Next) => any;export type ComposedMiddleware<T> = (  context: T,  next?: Next,) => Promise<void>;