Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Class expired_slot

boost::signals2::expired_slot — Indicates at least one of a slot's tracked objects has expired.

// In header: <boost/signals2/slot_base.hpp>


class expired_slot : public bad_weak_ptr {
public:
  virtual const char *  what() const;
};

The expired_slot exception is thrown to indicate at least one of a slot's tracked objects has expired.

virtual const char *  what() const;