...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
template< typename CompletionToken, completion_signature Signature, typename Initiation, typename... Args> DEDUCED async_initiate( Initiation && initiation, CompletionToken & , Args &&... args);
Header: boost/asio/async_result.hpp
Convenience header: boost/asio.hpp