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// Copyright (c) 2020 Jozty. All rights reserved. MIT license.
import curryN from './utils/curry_n.ts';import type { Func, PH } from './utils/types.ts';import { reduce } from './reduce.ts';import { ap } from './ap.ts';import { map } from './map.ts';import { tail } from './tail.ts';
// @typestype LiftN_2 = (fn: Func) => Func;
type LiftN_1 = (arity: number) => Func;
type LiftN =  & ((arity: number) => LiftN_2)  & ((arity: PH, fn: Func) => LiftN_1)  & ((arity: number, fn: Func) => Func);
function _liftN(arity: number, fn: Func): Func {  const lifted = curryN(arity, fn);  const f = function () {    const args = tail(arguments);    const mapped = (map(lifted, arguments[0]) as any) as Func[];    return reduce(ap, mapped, args);  };  return curryN(arity, f);}
/** * Lifts `fn` to a specified `arity`. The returned function applies * the `fn` on `arity` number of lists in all possible combination * of elements of the lists passe. The result is accumulated in a list * *      const add2 = Fae.liftN(3, (...args: number[]) => R.sum(args)) *      add2([1,2,3], [1,2,3], [1]); //=> [3, 4, 5, 4, 5, 6, 5, 6, 7] */export const liftN: LiftN = curryN(2, _liftN);