...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Compare two slots for inequality.
friend constexpr bool operator!=( const cancellation_slot & lhs, const cancellation_slot & rhs);
Header: boost/asio/cancellation_signal.hpp
Convenience header: boost/asio.hpp