In case anyone else gets this someone else gave me the tip to use `boost::executor_adaptor<TestEx> tex;` And a link to this discussion http://www.boost.org/doc/libs/1_60_0/doc/html/thread/synchronization.html#th... kind regards, James On 5 May 2016 at 19:02, Juan Ramírez <jramirez.uy@gmail.com> wrote:

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.

http://rextester.com/BAX37541

kind regards, James

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-- Juan :wq

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