Re: [Boost-bugs] [Boost C++ Libraries] #9710: Support std::exception_ptr in boost::promise

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9710: Support std::exception_ptr in boost::promise
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-03-10 22:37:01

#9710: Support std::exception_ptr in boost::promise
-------------------------------+----------------------
  Reporter:  ikispal@…         |      Owner:  viboes
      Type:  Feature Requests  |     Status:  assigned
 Milestone:  To Be Determined  |  Component:  threads
   Version:  Boost 1.55.0      |   Severity:  Problem
Resolution:                    |   Keywords:  futures
-------------------------------+----------------------

Comment (by viboes):

 Replying to [comment:2 Matt Calabrese]:
 > This is a fairly annoying problem for me as well, especially when
 writing code where you don't have control over the exception that's thrown
 -- all you want to do is intercept the exception by calling
 std::current_exception and set the promise. I need to use boost::futures
 because of facilities like wait_for_any, but the fact that it implies no
 longer being able to capture arbitrary exceptions is a fairly annoying
 problem. What exactly is the issue right now that prevents adding a
 std::exception_ptr overload when available? It seems like in the case that
 std::exception_ptr is available, boost::future/promise could deal with
 std::exception_ptr internally instead of boost::exception_ptr, correct?
 Both overloads could be provided (one for std::exception_ptr and one for
 boost::exception_ptr) since converting boost::exception_ptr to
 std::exception_ptr should be a much simpler conversion than the other way
 around and can be done inside the implementation of boost::promise.
 Perhaps I'm missing some subtleties, though?

 Maybe you are right and converting from boost::exception_ptr to
 std::exception_ptr could be more efficient.

 Ok, I will give it a try. I will request Andrey a function to do the
 conversion, and apply it internally. I could also do the conversion using
 the external interfaces waiting for an efficient version.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9710#comment:3>
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