...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
An argument placeholder, for use with std::bind() or boost::bind(), that
corresponds to the results argument of a handler for asynchronous functions
such as async_connect
.
unspecified endpoint;
Header: boost/asio/placeholders.hpp
Convenience header: boost/asio.hpp