...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Helper function to obtain an object's associated executor.
template< typename T, typename Executor> auto get_associated_executor( const T & t, const Executor & ex, typename constraint< is_executor< Executor >::value||execution::is_executor< Executor >::value >::type = 0);
associated_executor<T, Executor>::get(t,
ex)