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This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2023 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.

% start by loading the example:

| ?- logtalk_load(patches(loader)). ...

% find categories that complement objects:

| ?- complements_object(Category, Object).

Category = patch, Object = proto yes

% verify the patch in the "patch" category for the predicate init/0 % defined in the object "proto":

| ?- proto::init.

parent init proto init yes

% verify the imported category added to the "proto" object by the % "patch" category:

| ?- proto::pet(Pet).

Pet = cat yes