Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is an older version of Boost and was released in 2023. The current version is 1.90.0.

basic_stream::socket_type

The type of the underlying socket.

using socket_type = net::basic_stream_socket< Protocol, Executor >;