________________________________________________________________________

This file is part of Logtalk <https://logtalk.org/>  
Copyright 1998-2021 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.
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% 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 
