NUOO-Prolog is a simple object oriented extension to NU-Prolog, mostly hacked
together by Lee Naish rather quicky. It works as a preprocessor.
the (brief) examples below for some of the syntax/features.
One of the
nice things about the system is that
its "pure" in the sense it can easily be given clear declarative
semantics. A prototype declarative debugger has been implemented.
The down side is that objects can't have mutable state.
gives more information on the language and
implementation. The tech report describes a version implemented on top
of Quintus Prolog. The version here has some improvements such as
parameterised objects. I also have an implementation of further
enhancements such as supporting separate compilation and various forms
of multiple inheritance.
I have certainly found it of use for knowledge bases I have had to
Examples include coordinating honours and other fourth year courses where
there are students, thesis topics, supervisors etc, and coordinating the
technical programme of the
conference (paper submissions, reviews etc).