Based on this <http://www.boost.org/doc/libs/1_52_0/doc/html/thread/synchronization.html#thread.synchronization.futures.reference.async> doc, boost::async is defined as follows: template <class F> future <http://www.boost.org/doc/libs/1_52_0/doc/html/thread/synchronization.html#thread.synchronization.futures.reference.unique_future><typename result_of<typename decay<F>::type()>::type>async(F f);template <class F> future <http://www.boost.org/doc/libs/1_52_0/doc/html/thread/synchronization.html#thread.synchronization.futures.reference.unique_future><typename result_of<typename decay<F>::type()>::type>async(launch policy, F f); In your example you are calling the second overload, which takes a launch policy in its first argument, boost::launch is an enum (se here <http://www.boost.org/doc/libs/1_58_0/boost/thread/futures/launch.hpp>), i guess the compiler is failing trying to create an enum from your class instance. I tried your example using boost::launch::async and capturing your tex object: didn't have any problems at all. Best regards, Juan On Thu, May 5, 2016 at 9:18 AM, James Swift <james@pspdfkit.com> wrote:
Hi,
in case anyone wants to play with the example I provided but doesn't have access to MSVC you can do so online here.
kind regards, James
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-- Juan :wq