...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Construct an async result from a given handler.
async_result( completion_handler_type & h);
When using a specalised async_result
, the constructor
has an opportunity to initialise some state associated with the completion
handler, which is then returned from the initiating function.