Commits on Oct 13, 2017

1. Implement an API for asynchronous pack traversal …

   * This API is similar to traverse_pack however,
     it allows to suspend the control flow at any time.

   

   Naios committed Oct 13, 2017
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2. Prepare traverse_pack_async for using it inside when_all

   

   Naios committed Oct 13, 2017
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3. Inherit the visitor rather than embedding it as a class member …

   * Makes it possible to introduce a class in the
     hierarchy (future_data for instance).

   

   Naios committed Oct 13, 2017
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4. Use boost::intrusive_ptr rather than std::shared_ptr …

   * Makes it possible to create a shared future state from
     the traversal frame on the heap directly.
   * Makes it possible to access the visitor while the traversal
     is in progress or finished.
   * Use this to retrieve the counter in unit tests
     from the visitor.

   

   Naios committed Oct 13, 2017
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5. Test the async traversal for non accepted args

   

   Naios committed Oct 13, 2017
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6. Add the unit test of when_each to the build

   

   Naios committed Oct 13, 2017
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7. Never throw exceptions for detaching the control flow in async traver… …

   …sals

   

   Naios committed Oct 13, 2017
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8. Allow in-place construction for the async traversal frame

   

   Naios committed Oct 13, 2017
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9. Use virtual destructors in the async pack traversal

   

   Naios committed Oct 13, 2017
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10. Use the async pack traversal API for when_all …

    * Extends when_all for the ability to pass non future
      values through and to accept nested futures.
    * Cleanup the implementation and move internal stuff
      to a shared header (future_transforms.hpp).

    

    Naios committed Oct 13, 2017
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11. Use the async pack traversal API for dataflow …

    * Extends dataflow for the ability to
      accept nested futures.
    * Cleanup the implementation

    

    Naios committed Oct 13, 2017
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12. Remove the future invalidation from dataflow …

    * Isn't needed anymore since the whole pack of futures is moved
      in a temporary scope which gets destructed after the
      traversal was finished.
      Previously the arguments were moved out of the
      object dependent on the signature of the corresponding
      dataflow evaluation function.
    * Add a unit test for this
    * Ref 10d4604

    

    Naios committed Oct 13, 2017
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13. Merge pull request #2829 from Naios/async_traversal_pr …

    Implement an API for asynchronous pack traversal

    

    hkaiser committed Oct 13, 2017
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