...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Adapt a completion token to specify that the completion handler should have the cancellation slot as its associated cancellation slot.
template< typename CompletionToken> constexpr cancellation_slot_binder< decay_t< CompletionToken >, CancellationSlot > operator()( CompletionToken && completion_token) const;