Callback utility class. More...

#include <attachable.hpp>

Inherited by caf::abstract_group::subscription, and caf::default_attachable.

Classes
struct	token
	Represents a pointer to a value with its subtype as type ID number. More...

Public Member Functions
	attachable (const attachable &)=delete

attachable &	operator= (const attachable &)=delete

virtual optional< uint32_t >	handle_exception (const std::exception_ptr &eptr)
	Executed if the actor did not handle an exception and must not return `none` if this attachable did handle `eptr`. More...

virtual void	actor_exited (abstract_actor *self, uint32_t reason)
	Executed if the actor finished execution with given `reason`. More...

virtual bool	matches (const token &what)
	Returns `true` if `what` selects this instance, otherwise `false`.

template<class T >
bool	matches (const T &what)
	Returns `true` if `what` selects this instance, otherwise `false`.

Related Functions
(Note that these are not member functions.)
using	attachable_ptr = std::unique_ptr< attachable >

Detailed Description

Callback utility class.

Member Function Documentation

virtual void caf::attachable::actor_exited	(	abstract_actor *	self,
		uint32_t	reason
	)

virtual

Executed if the actor finished execution with given reason.

The default implementation does nothing.

virtual optional<uint32_t> caf::attachable::handle_exception ( const std::exception_ptr & eptr )

virtual

Executed if the actor did not handle an exception and must not return none if this attachable did handle eptr.

Note that the first handler to handle eptr "wins" and no other handler will be invoked.

using attachable_ptr = std::unique_ptr<attachable>