jubalskaggs / prolog.js

prolog interpreter in javascript

prolog.js

Prolog parser, compiler and interpreter in Javascript

Status

Features

• No server-code required
• Fact
• Rule
• Cut operator !
• Conjunction , and disjunction ;
• true and false boolean
• Operators (for more details, please see lexer.js
  • is
  • +, -, * and / arithmetic operators
  • = unification
  • =:=, =\=, >, <, =< and >= arithmetic operators
  • +, - and not unary operators
• builtin and user namespaces
  • But no builtin facts or rules are provided out-of-the-box
• List with | tail operator
• ?- unary operator
• fail

?- operator

The query operator is not standard in prolog source code. It is provided as convenience and used in the online demo.

DEMO

The demo can be accessed through here.

Javascript bridge

The compiler can be fed directly with Javascript objects. The classes Functor and Token can be used for this purpose. To understand how to construct "sentences" using these objects, I would encourage looking at the /tests and experimenting with Prolog.parse_per_sentence.

Contact

For more information, please contact Jean-Lou Dupont on G+.