import type { Result } from '../../mod.js';
/**
## wait : Convert asynchronous functions into synchronous execution
模拟[代数效应](https://mongkii.com/blog/2021-05-08-talk-about-algebraic-effects)在JS引擎的实现.

配合`run_effect`函数能实现 将异步代码转化为同步执行 的效果

@example
```typescript
const func1 = async () => {//mock async incident
  const pro1: string = await new Promise(res => {
    setTimeout(() => { res('Yes')}, 3000)  })
  return pro1
}

async function func2(){
  const pro2: string = await new Promise(res =>
    setTimeout(() => {res('No') }, 2000)  )
  return pro2
}

const running =()=> {
  const A=wait(func1)
  console.log(A.unwrap()) // 'Yes'
  const B=wait(func2)
  console.log(B.unwrap())//'No'
  return A.unwrap()+B.unwrap()
}

run_effect(
  running,
  (res)=>{
  console.log(res.unwrap())//'YesNo'
  })
```
### 注意事项⚠️
+  除了`wait()`内的函数,`run_effect()`内执行过程必须是[**纯函数**](https://zh.wikipedia.org/zh-hant/%E7%BA%AF%E5%87%BD%E6%95%B0)
+ `wait()`需要包裹在`run_effect()`内执行,`run_effect()`对于外部来说是一个异步函数,后续操作要在回调中执行
+ `wait(fn)`传入的fn不能是个匿名函数,必须是个**具名函数**,否则会报错
+ `wait()`语句尽量放在执行过程前面,能提高执行效率(由于JS并不支持代数效应导致)

@category Function
 */
export declare const wait: <T, E = unknown>(fn: () => Promise<T>) => Result<T, E>;
/** `wait`函数的运行环境 */
export declare function run_effect<T extends Result<any, any>>(fn: () => T, callback?: (res: T) => any): void;
export declare function run_effect<T, E = unknown>(fn: () => T, callback?: (res: Result<T, E>) => any): void;
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