...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 ConstBufferSequence, typename WriteHandler> void-or-deduced async_send( implementation_type & impl, const ConstBufferSequence & buffers, socket_base::message_flags flags, WriteHandler handler);