.. This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2024 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

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.. rst-class:: align-right

built-in predicate

.. index:: pair: current_event/5; Built-in predicate .. _predicates_current_event_5:

current_event/5

Description

::

current_event(Event, Object, Message, Sender, Monitor)

Enumerates, by backtracking, all defined events. The two types of events are represented by the atoms before and after.

Modes and number of proofs

::

current_event(?event, ?term, ?term, ?term, ?object_identifier) - zero_or_more

Errors

| Event is neither a variable nor a valid event identifier: | type_error(event, Event) | Object is neither a variable nor a valid object identifier: | type_error(object_identifier, Object) | Message is neither a variable nor a callable term: | type_error(callable, Message) | Sender is neither a variable nor a valid object identifier: | type_error(object_identifier, Sender) | Monitor is neither a variable nor a valid object identifier: | type_error(object_identifier, Monitor)

Examples

::

% enumerate all events monitored by the "debugger" object: | ?- current_event(Event, Object, Message, Sender, debugger).

.. seealso::

:ref:predicates_abolish_events_5, :ref:predicates_define_events_5, :ref:methods_before_3, :ref:methods_after_3