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Check or find currently pending after events (inside handler).
- Atom or variable
This built-in predicate is obsolete!
If Event is an atom, succeeds if Event is a currently pending after
event, i.e. an event which is setup by either event_after/2 or
event_after_every/2, and which is waiting to be raised
(event_after_every/2 will always be pending as it is raised
repeatedly). If Event is a variable, then all the currently pending
events are returned as a list. An event will appear as many times as it
had been setup.
Note that this predicate can only be called from within an after event
handler, i.e. when the timer is paused, and the after event state can be
safely examined. An error would be raised otherwise.
Modes and Determinism
- current_after_event(+) is semidet
- current_after_event(-) is det
Fails if Event is not a pending after event
- (1) general error
- Predicate is called while after events was not frozen.
- (5) type error
- Event is not an atom or variable.
:- setup, repeat, fail.
% just spinning after the setup for events to be raised.
event_after / 2, event_after_every / 2, event / 1, set_event_handler / 2, cancel_after_event / 1