Trampoline

import type { TrampolineFn, TrampolineSyncFn } from '@moeru/std/trampoline'

import { trampoline } from '@moeru/std/trampoline'

const factorial = (n: number, acc: number = 1): TrampolineSyncFn<number> =>
  n <= 1
    ? acc
    : () => factorial(n - 1, n * acc)

const factorialAsync = async (n: number, acc: number = 1): Promise<TrampolineFn<number>> =>
  n <= 1
    ? Promise.resolve(acc)
    : async () => factorialAsync(n - 1, n * acc)

console.log(await trampoline(() => factorial(5))) // 120
console.log(await trampoline(async () => factorialAsync(5))) // 120

import type { TrampolineSyncFn } from '@moeru/std/trampoline'

import { trampolineSync } from '@moeru/std/trampoline'

const factorial = (n: number, acc: number = 1): TrampolineSyncFn<number> =>
  n <= 1
    ? acc
    : () => factorial(n - 1, n * acc)

console.log(trampolineSync(() => factorial(5))) // 120