Did you know ... | Search Documentation: |
![]() | Pack logtalk -- logtalk-3.81.0/manuals/_sources/refman/predicates/category_property_2.rst.txt |
.. 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
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
.. rst-class:: align-right
built-in predicate
.. index:: pair: category_property/2; Built-in predicate .. _predicates_category_property_2:
::
category_property(Category, Property)
Enumerates, by backtracking, the properties associated with the defined categories. The valid properties are listed in the language grammar section on :ref:`entity properties <grammar_entity_properties>` and described in the User Manual section on :ref:`category properties <categories_properties>`.
::
category_property(?category_identifier, ?category_property) - zero_or_more
| Category
is neither a variable nor a valid category identifier:
| type_error(category_identifier, Category)
|
| Property
is neither a variable nor a callable term:
| type_error(callable, Property)
| Property
is a callable term but not a valid category property:
| domain_error(category_property, Property)
::
% enumerate the properties of the core_messages built-in category:
| ?- category_property(core_messages, Property)
.
Property = source_data ; Property = static ; Property = built_in ; ...
.. seealso::
:ref:predicates_abolish_category_1
,
:ref:predicates_create_category_4
,
:ref:predicates_current_category_1
,
:ref:predicates_complements_object_2
,
:ref:predicates_extends_category_2_3
,
:ref:predicates_imports_category_2_3