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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | 23x 23x 23x 20x 12x 8x 4x 4x 3x | import { isPromiseLike } from './isPromiseLike'
/**
* 以数组的方式返回函数执行的结果，如果函数返回一个异步操作，将会执行该异步操作并将其结果作为函数执行的结果返回。
*
* @param fn 要执行的函数
* @returns 返回 `[错误信息, 结果数据]`，错误信息为 `null` 表示没有错误
* @example
* ```typescript
* // 函数执行成功
* const [err, res] = await run(() => 'ok') // => [null, 'ok']
* const [err, res] = await run(async () => 'ok') // => [null, 'ok']
*
* // 函数执行出错
* const [err, res] = await run(() => { throw 'err' }) // => ['err']
* const [err, res] = await run(async () => { throw 'err' }) // => ['err']
* ```
*/
export function run<T extends () => any, R extends ReturnType<T>>(
fn: T,
): Promise<
[
unknown,
R extends PromiseLike<any>
? R extends PromiseLike<infer X>
? X
: unknown
: R,
]
> {
return new Promise(resolve => {
try {
const res = fn()
if (!isPromiseLike(res)) {
return resolve([null, res])
}
return res.then(
res => resolve([null, res]),
err => resolve([err] as any),
)
} catch (err) {
return resolve([err] as any)
}
})
}
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