Erlang：带有多个超时子句的接收语句

发布于 2024-08-02 20:53:54 字数 468 浏览 2 评论 0原文

接收语句是否可以有多个超时子句，如果可以，正确的语法是什么？

我想做一些类似的事情

foo(Timout1, Timeout2) ->
    receive
    after
        Timeout1 ->
            doSomething1();
        Timeout2 ->
            doSomething2()
    end.

，具体取决于 Timeout1 或 Timeout2 中哪个较小，doSomething1() 或 doSomething2 > 被调用。但是，上面的代码会导致语法错误。

如果，正如我开始怀疑的那样，这是不可能的，那么以合适的 Erlangy 方式实现相同结果的最佳方法是什么？

提前致谢！

原文

Is it possible for a receive statement to have multiple timeout clauses, and if so, what is the correct syntax?

I want to do something like

foo(Timout1, Timeout2) ->
    receive
    after
        Timeout1 ->
            doSomething1();
        Timeout2 ->
            doSomething2()
    end.

where, depending on which of Timeout1 or Timeout2 is smaller, doSomething1() or doSomething2 is called. However, the above code causes a syntax error.

If, as I'm beginning to suspect, this is not possible, what is the best way to achieve the same outcome in a suitable Erlangy manner?

Thanks in advance!

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

一腔孤↑勇 2024-08-09 20:53:54

不，你不能。只需在接收之前决定要做什么。

foo(Timeout1, Timeout2) ->
    {Timeout, ToDo} = if Timeout1 < Timeout2 -> {Timout1, fun doSomething1/0};
                         true -> {Timeout2, fun doSomething2/0} end,
    receive
    after Timeout -> ToDo()
    end.

或

foo(Timeout1, Timeout2) when Timeout1 < Timeout2 ->
    receive
    after Timeout1 -> doSomething1()
    end;
foo(_, Timeout2) ->
    receive
    after Timeout2 -> doSomething2()
    end.

等等

No, you can't. Just decide what to do before receive.

foo(Timeout1, Timeout2) ->
    {Timeout, ToDo} = if Timeout1 < Timeout2 -> {Timout1, fun doSomething1/0};
                         true -> {Timeout2, fun doSomething2/0} end,
    receive
    after Timeout -> ToDo()
    end.

foo(Timeout1, Timeout2) when Timeout1 < Timeout2 ->
    receive
    after Timeout1 -> doSomething1()
    end;
foo(_, Timeout2) ->
    receive
    after Timeout2 -> doSomething2()
    end.

etc.

回复收藏 0 原文