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   Copyright 1998-2019 Paulo Moura <pmoura@logtalk.org>

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
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       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
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.. index:: pair: threaded_ignore/1; Built-in predicate
.. _predicates_threaded_ignore_1:

threaded_ignore/1
=================

Description
-----------

::

   threaded_ignore(Goal)

Proves ``Goal`` asynchronously using a new thread. Only the first goal
solution is found. The argument can be a message sending goal. This call
always succeeds, independently of the result (success, failure, or
exception), which is simply discarded instead of being sent back to the
message queue of the object containing the call
(:term:`this`).

Modes and number of proofs
--------------------------

::

   threaded_ignore(@callable) - one

Errors
------

| Goal is a variable:
|     ``instantiation_error``
| Goal is neither a variable nor a callable term:
|     ``type_error(callable, Goal)``

Examples
--------

| Prove ``Goal`` asynchronously in a new thread:
|     ``threaded_ignore(Goal)``
| Prove ``::Message`` asynchronously in a new thread:
|     ``threaded_ignore(::Message)``
| Prove ``Object::Message`` asynchronously in a new thread:
|     ``threaded_ignore(Object::Message)``

.. seealso::

   :ref:`predicates_threaded_call_1_2`,
   :ref:`predicates_threaded_exit_1_2`,
   :ref:`predicates_threaded_once_1_2`,
   :ref:`predicates_threaded_peek_1_2`,
   :ref:`predicates_threaded_1`,
   :ref:`directives_synchronized_1`
