Language Support for Asynchronous Programming

The Discussion

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  I'm glad to see so many questions about async\await.  Hopefully a similar pattern will show up in other languages... hint, hint, C++   Keep up the amazing work!!!

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  And it even works on the latest mono
  http://blog.bekijkhet.com/net-4-5-new-async-library-on-visual-studio-11-beta-and-latest-mono/

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  Is the source code for that sample app available anywhere?

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  @AceHack: it is possible to wait for the result of an asynchronous operation in C++ using PPL tasks.

  It may need conversion from IAsyncOperation<> to a Concurrency::task<> and then you can use Concurrency::task<>::get() to comfortably achieve the same thing as await.

  auto classificationOp = runClassification(result->docText, result->lang);
  task<Platform::String^>classificationTask(classificationOp);
  Platform::String^ classification = classificationTask.get();

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  @milgner I think this would be a blocking wait and it think it will only work in Metro style apps.  I was really hoping for a await language feature in C++ that would do the auto continuation (state machine) kind of thing like C# (Non Blocking).  Herb mentioned having this language feature possibly in the future with his talk here http://channel9.msdn.com/Events/Lang-NEXT/Lang-NEXT-2012/-Not-Your-Father-s-C-

  It took a while for that video to go up so I was completely unaware that Herb was already thinking about await as a C++ language extension or I would not have mentioned it again.  Thanks all language guys at Lang.Next, I've been very impressed.