...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Defined in header <boost/beast/core/basic_stream.hpp>
struct impl_type : public boost::enable_shared_from_this< impl_type >, public boost::empty_value< RatePolicy >
Convenience header <boost/beast/core.hpp>