D中是否存在与C ++等效的Future / Promise？ [英] Is there a Future/Promise equivalent of C++ in D?
问题描述
D世界中是否存在C ++世界中的未来/承诺？
Does there exist a future/promise equivalent from the C++ world in the D world?
当然有 std.parallelism ，但是它不完全具有promise / future组合的功能（没有等同于获得未来或设置结果或异常，您也不能等待完成。）
Sure there is std.parallelism but it's doesn't have exactly the functionality of the promise/future combination (there is no equivalent to get the future or the set the result or the exception, you can't also wait for completion).
推荐答案
我相信您没有认真研究 std.parallelism ...相当于获取未来（如果您是说 std :: future 的get（）方法）是yieldForce（），spinForce（）和workForce（）。仔细阅读这些内容，您会发现您也可以等待完成...
I believe you did not seriously look at std.parallelism... Equivalent to "get the future" (if by that you mean the std::future's get() method) are yieldForce(), spinForce() and workForce(). Read about these more carefully and you will see that you can wait for completion as well...
std :: future :: get（ ）等到将来有一个有效的结果，然后（取决于所使用的模板）进行检索。
std::future::get() waits until the future has a valid result and (depending on which template is used) retrieves it. That is exactly what yieldForce does.
关于例外...在哪里看到您无法获得例外？？
从 std.parallelism 页：如果任务未启动但是，在当前线程中执行它。完成后，返回其返回值（如果有）。如果正在进行中，请等待条件变量。 如果引发异常，请重新引发该异常。
About exceptions... Where did you see you can't get an exception?? From the std.parallelism page: If the Task isn't started yet, execute it in the current thread. If it's done, return its return value, if any. If it's in progress, wait on a condition variable. If it threw an exception, rethrow that exception.
std.parallelism遭受不尝试复制C ++和/的痛苦或Java以及来自这些社区的人们总是希望事情像过去那样（在那儿做到）。
std.parallelism "suffers" from not trying to copy C++ and/or Java and people who come from these communities always expect things to behave as they are used to (been there, done that).
有人纠正了我，但std.parallelism早于std :: future和std :: promise，对吧？
Someone correct me, but std.parallelism pre-dates std::future and std::promise, right?
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