[Boost-bugs] [Boost C++ Libraries] #10610: Add unwrap shared_future constructor

Subject: [Boost-bugs] [Boost C++ Libraries] #10610: Add unwrap shared_future constructor
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-10-05 10:17:57

#10610: Add unwrap shared_future constructor
 Reporter: viboes | Owner: anthonyw
     Type: Feature Requests | Status: new
Milestone: To Be Determined | Component: thread
  Version: Boost 1.57.0 | Severity: Problem
 Keywords: |
 Following N4123, add unwrap shared_future constructor

 See also https://github.com/cplusplus/concurrency_ts/issues/58


 shared_future(future<shared_future<R>>&& rhs) noexcept;

     Constructs a shared_future object from the shared state referred to by
 rhs. The shared_future becomes ready when one of the following occurs:

         Both the outer future and the inner shared_future are ready. The
 shared_future inherits the value or the exception from the inner
         The outer future is ready but the inner shared_future is invalid.
 The shared_future gets an exception of type std::future_error, with an
 error code of std::future_errc::broken_promise.


         valid() returns the same value as rhs.valid() prior to the
 constructor invocation.
         valid() == true.
         rhs.valid() == false.


Ticket URL: <https://svn.boost.org/trac/boost/ticket/10610>
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