Remove unmaintained and unused YieldProlog scripting language

This hasn't been mainntained since 2008 and has not been kept up with the rest of the language infrastructure.
Hence, it almost certainly doesn't work and has never been used, afaik
If this is wrong, please say on the opensim-users/dev mailing list.
Removing to reduce maintenance burden (since it still needs to be made to compile).

1 files changed, 0 insertions, 196 deletions

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/Functor.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/Functor.cs
deleted file mode 100644
index 4d65f5b..0000000
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/YieldProlog/Functor.cs
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * Copyright (C) 2007-2008, Jeff Thompson
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of the copyright holder nor the names of its contributors
- *       may be used to endorse or promote products derived from this software
- *       without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-using System;
-using System.Collections.Generic;
-
-namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog
-{
-    public class Functor : IUnifiable
-    {
-        public readonly Atom _name;
-        public readonly object[] _args;
-
-        public Functor(Atom name, object[] args)
-        {
-            if (args.Length <= 3)
-            {
-                if (args.Length == 0)
-                    throw new Exception("For arity 0 functor, just use name as an Atom");
-                else if (args.Length == 1)
-                    throw new Exception("For arity 1 functor, use Functor1");
-                else if (args.Length == 2)
-                    throw new Exception("For arity 2 functor, use Functor2");
-                else if (args.Length == 3)
-                    throw new Exception("For arity 3 functor, use Functor3");
-                else
-                    // (This shouldn't happen, but include it for completeness.
-                    throw new Exception("Cannot create a Functor of arity " + args.Length);
-            }
-
-            _name = name;
-            _args = args;
-        }
-
-        public Functor(string name, object[] args)
-            : this(Atom.a(name), args)
-        {
-        }
-
-        /// <summary>
-        /// Return an Atom, Functor1, Functor2, Functor3 or Functor depending on the
-        /// length of args.
-        /// Note that this is different than the Functor constructor which requires
-        /// the length of args to be greater than 3.
-        /// </summary>
-        /// <param name="name"></param>
-        /// <param name="args"></param>
-        /// <returns></returns>
-        public static object make(Atom name, object[] args)
-        {
-            if (args.Length <= 0)
-                return name;
-            else if (args.Length == 1)
-                return new Functor1(name, args[0]);
-            else if (args.Length == 2)
-                return new Functor2(name, args[0], args[1]);
-            else if (args.Length == 3)
-                return new Functor3(name, args[0], args[1], args[2]);
-            else
-                return new Functor(name, args);
-        }
-
-        /// <summary>
-        /// Call the main make, first converting name to an Atom.
-        /// </summary>
-        /// <param name="name"></param>
-        /// <param name="args"></param>
-        /// <returns></returns>
-        public static object make(string name, object[] args)
-        {
-            return make(Atom.a(name), args);
-        }
-
-        /// <summary>
-        /// If arg is another Functor, then succeed (yield once) if this and arg have the
-        /// same name and all functor args unify, otherwise fail (don't yield).
-        /// If arg is a Variable, then call its unify to unify with this.
-        /// Otherwise fail (don't yield).
-        /// </summary>
-        /// <param name="arg"></param>
-        /// <returns></returns>
-        public IEnumerable<bool> unify(object arg)
-        {
-            arg = YP.getValue(arg);
-            if (arg is Functor)
-            {
-                Functor argFunctor = (Functor)arg;
-                if (_name.Equals(argFunctor._name))
-                    return YP.unifyArrays(_args, argFunctor._args);
-                else
-                    return YP.fail();
-            }
-            else if (arg is Variable)
-                return ((Variable)arg).unify(this);
-            else
-                return YP.fail();
-        }
-
-        public override string ToString()
-        {
-            string result = _name + "(" + YP.getValue(_args[0]);
-            for (int i = 1; i < _args.Length; ++i)
-                result += ", " + YP.getValue(_args[i]);
-            result += ")";
-            return result;
-        }
-
-        public bool termEqual(object term)
-        {
-            term = YP.getValue(term);
-            if (term is Functor)
-            {
-                Functor termFunctor = (Functor)term;
-                if (_name.Equals(termFunctor._name) && _args.Length == termFunctor._args.Length)
-                {
-                    for (int i = 0; i < _args.Length; ++i)
-                    {
-                        if (!YP.termEqual(_args[i], termFunctor._args[i]))
-                            return false;
-                    }
-                    return true;
-                }
-            }
-            return false;
-        }
-
-        public bool lessThan(Functor functor)
-        {
-            // Do the equal check first since it is faster.
-            if (!_name.Equals(functor._name))
-                return _name.lessThan(functor._name);
-
-            if (_args.Length != functor._args.Length)
-                return _args.Length < functor._args.Length;
-
-            for (int i = 0; i < _args.Length; ++i)
-            {
-                if (!YP.termEqual(_args[i], functor._args[i]))
-                    return YP.termLessThan(_args[i], functor._args[i]);
-            }
-
-            return false;
-        }
-
-        public bool ground()
-        {
-            for (int i = 0; i < _args.Length; ++i)
-            {
-                if (!YP.ground(_args[i]))
-                    return false;
-            }
-            return true;
-        }
-
-        public void addUniqueVariables(List<Variable> variableSet)
-        {
-            for (int i = 0; i < _args.Length; ++i)
-                YP.addUniqueVariables(_args[i], variableSet);
-        }
-
-        public object makeCopy(Variable.CopyStore copyStore)
-        {
-            object[] argsCopy = new object[_args.Length];
-            for (int i = 0; i < _args.Length; ++i)
-                argsCopy[i] = YP.makeCopy(_args[i], copyStore);
-            return new Functor(_name, argsCopy);
-        }
-    }
-}