我可以明确地检查取消/终止异步计算？ [英] Can I explicitly check for cancellation / terminate async computation?

问题描述

我有一个异步计算像下面（见内嵌注释）：

I have an async computation like the following (see inline comments):

async {
  //...
  do! Async.Sleep(100) //cancellation may happen during sleep
  //... but isn't checked at the end of the sleep, so regular, non-async computations are executed here 
}

为了强制取消支票/常规计算部分之前终止整个异步计算达到，我插入一个有效的无操作做的！ Async.Sleep（1）后，立即做的！ Async.Sleep（100）。是否有一个更清洁的方式做到这一点？甚至可能像做的！ Async.Nop 。

In order to force a cancellation check / terminate the entire async computation before the "regular" computation part is reached, I insert an effective no-op do! Async.Sleep(1) immediately after the do! Async.Sleep(100). Is there a cleaner way to do this? Possibly even something like do! Async.Nop.

推荐答案

如何是这样的：

let nop = async.Return ()

然后，你可以使用它像：

Then you could use it like:

async {
    // ...
    do! Async.Sleep 100
    do! nop
}

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