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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.
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% start by loading the design pattern sample implementations:

| ?- logtalk_load(design_patterns('behavioral/iterator/loader')).
...


% add some books to our collection:

| ?- book_collection::(
		add_title('Design Patterns'),
		add_title('Design Patterns in Dynamic Languages'),
		add_title('Analysis patterns')
     ).


% use the iterator predicate to print all titles in the collection:

| ?- forall(book_collection::element(Title), (write(Title), nl)).

Design Patterns
Design Patterns in Dynamic Languages
Analysis patterns
yes
