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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.

% load the example:

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

% create two new persons:

| ?- person::new(Id1, 'Oscar the Grouch', '1969/11/10'), person::new(Id2, 'Cookie Monster', '1969/12/02').

Id1 = o1, Id2 = o2 yes

% print a description of a person:

| ?- o2::print.

Name: Oscar the Grouch Birth: 1969/11/10 yes

% create a new teacher and a new student:

| ?- teacher::new(Id3, 'Gordon Robinson', '1969/11/10', '3.2'), student::new(Id4, 'Roosevelt Franklin', '1969/11/10', 'Blue').

Id3 = o3, Id4 = o4 yes

% print a description of a student:

| ?- o4::print.

Name: Roosevelt Franklin Birth: 1969/11/10 Dormitory: Blue yes

% try the alternative object representations using the object proxies:

| ?- {student('Roosevelt Franklin', _, _)}::print.

Name: Roosevelt Franklin Birth: 1969/11/10 Dormitory: Blue yes