...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Used to generically specialise associators for a type.
template< template< typename, typename > class Associator, typename T, typename DefaultCandidate> struct associator
Header: boost/asio/associator.hpp
Convenience header: boost/asio.hpp