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Prolog++

Wikipedia contributorsAdapted for Fathomly · View authors
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Source updated May 12, 2025

Prolog++ is an object-oriented toolkit for the Prolog logic programming language. It allows classes and class hierarchies to be created within Prolog programs.

Prolog++ was developed by LPA and first released in 1989 for MS-DOS PCs. Support for other platforms was added, and a second version was released in 1995. A book entitled 'Prolog++ The Power of Object-Oriented and Logic Programming' by Chris Moss was published by Addison-Wesley in 1994.

Currently, Prolog++ is available as an add-on to LPA Prolog for Windows.

Three other approaches to object-oriented Prolog include PDC Visual Prolog (once known as Borland Turbo Prolog), SICStus Prolog and the almost implementation-neutral Logtalk framework.

Watch videos about Prolog++Explainers and documentaries on YouTube (opens in a new tab)

Sources and credits

This article is adapted from the Wikipedia article “Prolog++”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

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Related topics

Logtalk

Logtalk is an object-oriented logic programming language that extends and leverages the Prolog language with a feature set suitable for programming in the large. It provides support for encapsulation and data hiding, separation of concerns and enhanced code reuse.

Visual Prolog

Visual Prolog, previously known as PDC Prolog and Turbo Prolog, is a strongly typed object-oriented extension of Prolog. It was marketed by Borland as Turbo Prolog.

Comparison of Prolog implementations

The following comparison of Prolog implementations provides a reference for the relative feature sets and performance of different implementations of the Prolog computer programming language. A comprehensive discussion of the most significant Prolog systems is presented in an article published in the 50-years of Prolog anniversary issue of the journal Theory and Practice of Logic Programming.