.. 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 method

.. index:: pair: current_op/3; Built-in method .. _methods_current_op_3:

current_op/3

Description

::

current_op(Priority, Specifier, Operator)

Enumerates, by backtracking, the visible operators declared for an object. Operators not declared using a scope directive are not enumerated.

Modes and number of proofs

::

current_op(?operator_priority, ?operator_specifier, ?atom) - zero_or_more

Errors

| Priority is neither a variable nor an integer: | type_error(integer, Priority) | Priority is an integer but not a valid operator priority: | domain_error(operator_priority, Priority) | Specifier is neither a variable nor an atom: | type_error(atom, Specifier) | Specifier is an atom but not a valid operator specifier: | domain_error(operator_specifier, Specifier) | Operator is neither a variable nor an atom: | type_error(atom, Operator)

Examples

| To enumerate, by backtracking, the local operators or the operators visible in :term:this: | current_op(Priority, Specifier, Operator) | To enumerate, by backtracking, the public and protected operators visible in :term:self: | ::current_op(Priority, Specifier, Operator) | To enumerate, by backtracking, the public operators visible for an explicit object: | Object::current_op(Priority, Specifier, Operator)

.. seealso::

:ref:methods_current_predicate_1, :ref:methods_predicate_property_2, :ref:directives_op_3