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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.

gensym

The gensym library implements predicates for generating unique atoms. The public predicates are declared synchronized to prevent race conditions when using a backend Prolog compiler with multi-threading support.

API documentation

Open the [../../docs/library_index.html#gensym](../../docs/library_index.html#gensym) link in a web browser.

Loading

To load all entities in this library, load the loader.lgt file:

| ?- logtalk_load(gensym(loader)).

Testing

To test this library predicates, load the tester.lgt file:

| ?- logtalk_load(gensym(tester)).

Usage

The gensym_core category implements the library predicates. This category is imported by the default gensym object to provide application global generators. To make the generators local and thus minimize the potential for generator name clashes, the category can be imported by one or more application objects. Use protected or private import to restrict the scope of the library predicates. For example:

:- object(foo,
        imports(private::gensym_core)).

        bar :-
                ^^gensym(p, S),
                ...

:- end_object.