path: root/OpenSim/Region/ScriptEngine/XMREngine/MMRScriptBinOpStr.cs

/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * 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 OpenSimulator Project 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 DEVELOPERS ``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 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 OpenSim.Region.ScriptEngine.Shared.ScriptBase;
using OpenSim.Region.ScriptEngine.XMREngine;
using System;
using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Reflection.Emit;
using System.Text;
using System.Text.RegularExpressions;

using LSL_Float = OpenSim.Region.ScriptEngine.Shared.LSL_Types.LSLFloat;
using LSL_Integer = OpenSim.Region.ScriptEngine.Shared.LSL_Types.LSLInteger;
using LSL_Key = OpenSim.Region.ScriptEngine.Shared.LSL_Types.LSLString;
using LSL_List = OpenSim.Region.ScriptEngine.Shared.LSL_Types.list;
using LSL_Rotation = OpenSim.Region.ScriptEngine.Shared.LSL_Types.Quaternion;
using LSL_String = OpenSim.Region.ScriptEngine.Shared.LSL_Types.LSLString;
using LSL_Vector = OpenSim.Region.ScriptEngine.Shared.LSL_Types.Vector3;

namespace OpenSim.Region.ScriptEngine.XMREngine {

    /**
     * @brief This class is used to catalog the code emit routines based on a key string
     *        The key string has the two types (eg, "integer", "rotation") and the operator (eg, "*", "!=")
     */
    public delegate void BinOpStrEmitBO (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result);
    public class BinOpStr {
        public static readonly Dictionary<string, BinOpStr> defined = DefineBinOps ();

        public Type outtype;           // type of result of computation
        public BinOpStrEmitBO emitBO;  // how to compute result
        public bool rmwOK;             // is the <operator>= form valid?

        public BinOpStr (Type outtype, BinOpStrEmitBO emitBO)
        {
            this.outtype = outtype;
            this.emitBO  = emitBO;
            this.rmwOK   = false;
        }

        public BinOpStr (Type outtype, BinOpStrEmitBO emitBO, bool rmwOK)
        {
            this.outtype = outtype;
            this.emitBO  = emitBO;
            this.rmwOK   = rmwOK;
        }

        private static TokenTypeBool   tokenTypeBool   = new TokenTypeBool   (null);
        private static TokenTypeChar   tokenTypeChar   = new TokenTypeChar   (null);
        private static TokenTypeFloat  tokenTypeFloat  = new TokenTypeFloat  (null);
        private static TokenTypeInt    tokenTypeInt    = new TokenTypeInt    (null);
        private static TokenTypeList   tokenTypeList   = new TokenTypeList   (null);
        private static TokenTypeRot    tokenTypeRot    = new TokenTypeRot    (null);
        private static TokenTypeStr    tokenTypeStr    = new TokenTypeStr    (null);
        private static TokenTypeVec    tokenTypeVec    = new TokenTypeVec    (null);

        private static MethodInfo stringAddStringMethInfo = ScriptCodeGen.GetStaticMethod (typeof (string), "Concat",  new Type[] { typeof (string), typeof (string) });
        private static MethodInfo stringCmpStringMethInfo = ScriptCodeGen.GetStaticMethod (typeof (string), "Compare", new Type[] { typeof (string), typeof (string) });

        private static MethodInfo infoMethListAddFloat = GetBinOpsMethod ("MethListAddFloat", new Type[] { typeof (LSL_List),     typeof (double)  });
        private static MethodInfo infoMethListAddInt   = GetBinOpsMethod ("MethListAddInt",   new Type[] { typeof (LSL_List),     typeof (int)          });
        private static MethodInfo infoMethListAddKey   = GetBinOpsMethod ("MethListAddKey",   new Type[] { typeof (LSL_List),     typeof (string)       });
        private static MethodInfo infoMethListAddRot   = GetBinOpsMethod ("MethListAddRot",   new Type[] { typeof (LSL_List),     typeof (LSL_Rotation) });
        private static MethodInfo infoMethListAddStr   = GetBinOpsMethod ("MethListAddStr",   new Type[] { typeof (LSL_List),     typeof (string)       });
        private static MethodInfo infoMethListAddVec   = GetBinOpsMethod ("MethListAddVec",   new Type[] { typeof (LSL_List),     typeof (LSL_Vector)   });
        private static MethodInfo infoMethListAddList  = GetBinOpsMethod ("MethListAddList",  new Type[] { typeof (LSL_List),     typeof (LSL_List)     });
        private static MethodInfo infoMethFloatAddList = GetBinOpsMethod ("MethFloatAddList", new Type[] { typeof (double),  typeof (LSL_List)     });
        private static MethodInfo infoMethIntAddList   = GetBinOpsMethod ("MethIntAddList",   new Type[] { typeof (int),          typeof (LSL_List)     });
        private static MethodInfo infoMethKeyAddList   = GetBinOpsMethod ("MethKeyAddList",   new Type[] { typeof (string),       typeof (LSL_List)     });
        private static MethodInfo infoMethRotAddList   = GetBinOpsMethod ("MethRotAddList",   new Type[] { typeof (LSL_Rotation), typeof (LSL_List)     });
        private static MethodInfo infoMethStrAddList   = GetBinOpsMethod ("MethStrAddList",   new Type[] { typeof (string),       typeof (LSL_List)     });
        private static MethodInfo infoMethVecAddList   = GetBinOpsMethod ("MethVecAddList",   new Type[] { typeof (LSL_Vector),   typeof (LSL_List)     });
        private static MethodInfo infoMethListEqList   = GetBinOpsMethod ("MethListEqList",   new Type[] { typeof (LSL_List),     typeof (LSL_List)     });
        private static MethodInfo infoMethListNeList   = GetBinOpsMethod ("MethListNeList",   new Type[] { typeof (LSL_List),     typeof (LSL_List)     });
        private static MethodInfo infoMethRotEqRot     = GetBinOpsMethod ("MethRotEqRot",     new Type[] { typeof (LSL_Rotation), typeof (LSL_Rotation) });
        private static MethodInfo infoMethRotNeRot     = GetBinOpsMethod ("MethRotNeRot",     new Type[] { typeof (LSL_Rotation), typeof (LSL_Rotation) });
        private static MethodInfo infoMethRotAddRot    = GetBinOpsMethod ("MethRotAddRot",    new Type[] { typeof (LSL_Rotation), typeof (LSL_Rotation) });
        private static MethodInfo infoMethRotSubRot    = GetBinOpsMethod ("MethRotSubRot",    new Type[] { typeof (LSL_Rotation), typeof (LSL_Rotation) });
        private static MethodInfo infoMethRotMulRot    = GetBinOpsMethod ("MethRotMulRot",    new Type[] { typeof (LSL_Rotation), typeof (LSL_Rotation) });
        private static MethodInfo infoMethRotDivRot    = GetBinOpsMethod ("MethRotDivRot",    new Type[] { typeof (LSL_Rotation), typeof (LSL_Rotation) });
        private static MethodInfo infoMethVecEqVec     = GetBinOpsMethod ("MethVecEqVec",     new Type[] { typeof (LSL_Vector),   typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecNeVec     = GetBinOpsMethod ("MethVecNeVec",     new Type[] { typeof (LSL_Vector),   typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecAddVec    = GetBinOpsMethod ("MethVecAddVec",    new Type[] { typeof (LSL_Vector),   typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecSubVec    = GetBinOpsMethod ("MethVecSubVec",    new Type[] { typeof (LSL_Vector),   typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecMulVec    = GetBinOpsMethod ("MethVecMulVec",    new Type[] { typeof (LSL_Vector),   typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecModVec    = GetBinOpsMethod ("MethVecModVec",    new Type[] { typeof (LSL_Vector),   typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecMulFloat  = GetBinOpsMethod ("MethVecMulFloat",  new Type[] { typeof (LSL_Vector),   typeof (double)  });
        private static MethodInfo infoMethFloatMulVec  = GetBinOpsMethod ("MethFloatMulVec",  new Type[] { typeof (double),  typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecDivFloat  = GetBinOpsMethod ("MethVecDivFloat",  new Type[] { typeof (LSL_Vector),   typeof (double)  });
        private static MethodInfo infoMethVecMulInt    = GetBinOpsMethod ("MethVecMulInt",    new Type[] { typeof (LSL_Vector),   typeof (int)          });
        private static MethodInfo infoMethIntMulVec    = GetBinOpsMethod ("MethIntMulVec",    new Type[] { typeof (int),          typeof (LSL_Vector)   });
        private static MethodInfo infoMethVecDivInt    = GetBinOpsMethod ("MethVecDivInt",    new Type[] { typeof (LSL_Vector),   typeof (int)          });
        private static MethodInfo infoMethVecMulRot    = GetBinOpsMethod ("MethVecMulRot",    new Type[] { typeof (LSL_Vector),   typeof (LSL_Rotation) });
        private static MethodInfo infoMethVecDivRot    = GetBinOpsMethod ("MethVecDivRot",    new Type[] { typeof (LSL_Vector),   typeof (LSL_Rotation) });

        private static MethodInfo GetBinOpsMethod (string name, Type[] types)
        {
            return ScriptCodeGen.GetStaticMethod (typeof (BinOpStr), name, types);
        }

        /**
         * @brief Create a dictionary for processing binary operators.
         *        This tells us, for a given type, an operator and another type,
         *        is the operation permitted, and if so, what is the type of the result?
         * The key is <lefttype><opcode><righttype>,
         *   where <lefttype> and <righttype> are strings returned by (TokenType...).ToString()
         *   and <opcode> is string returned by (TokenKw...).ToString()
         * The value is a BinOpStr struct giving the resultant type and a method to generate the code.
         */
        private static Dictionary<string, BinOpStr> DefineBinOps ()
        {
            Dictionary<string, BinOpStr> bos = new Dictionary<string, BinOpStr> ();

            string[] booltypes = new string[] { "bool", "char", "float", "integer", "key", "list", "string" };

            /*
             * Get the && and || all out of the way...
             * Simply cast their left and right operands to boolean then process.
             */
            for (int i = 0; i < booltypes.Length; i ++) {
                for (int j = 0; j < booltypes.Length; j ++) {
                    bos.Add (booltypes[i] + "&&" + booltypes[j], 
                             new BinOpStr (typeof (bool), BinOpStrAndAnd));
                    bos.Add (booltypes[i] + "||" + booltypes[j], 
                             new BinOpStr (typeof (bool), BinOpStrOrOr));
                }
            }

            /*
             * Pound through all the other combinations we support.
             */

            // boolean : somethingelse
            DefineBinOpsBoolX (bos, "bool");
            DefineBinOpsBoolX (bos, "char");
            DefineBinOpsBoolX (bos, "float");
            DefineBinOpsBoolX (bos, "integer");
            DefineBinOpsBoolX (bos, "key");
            DefineBinOpsBoolX (bos, "list");
            DefineBinOpsBoolX (bos, "string");

            // stuff with chars
            DefineBinOpsChar (bos);

            // somethingelse : boolean
            DefineBinOpsXBool (bos, "char");
            DefineBinOpsXBool (bos, "float");
            DefineBinOpsXBool (bos, "integer");
            DefineBinOpsXBool (bos, "key");
            DefineBinOpsXBool (bos, "list");
            DefineBinOpsXBool (bos, "string");

            // float : somethingelse
            DefineBinOpsFloatX (bos, "float");
            DefineBinOpsFloatX (bos, "integer");

            // integer : float
            DefineBinOpsXFloat (bos, "integer");

            // anything else with integers
            DefineBinOpsInteger (bos);

            // key : somethingelse
            DefineBinOpsKeyX (bos, "key");
            DefineBinOpsKeyX (bos, "string");

            // string : key
            DefineBinOpsXKey (bos, "string");

            // things with lists
            DefineBinOpsList (bos);

            // things with rotations
            DefineBinOpsRotation (bos);

            // things with strings
            DefineBinOpsString (bos);

            // things with vectors
            DefineBinOpsVector (bos);

            // Contrary to some beliefs, scripts do things like string+integer and integer+string
            bos.Add ("bool+string",    new BinOpStr (typeof (string), BinOpStrStrAddStr));
            bos.Add ("char+string",    new BinOpStr (typeof (string), BinOpStrStrAddStr));
            bos.Add ("float+string",   new BinOpStr (typeof (string), BinOpStrStrAddStr));
            bos.Add ("integer+string", new BinOpStr (typeof (string), BinOpStrStrAddStr));
            bos.Add ("string+bool",    new BinOpStr (typeof (string), BinOpStrStrAddStr, true));
            bos.Add ("string+char",    new BinOpStr (typeof (string), BinOpStrStrAddStr, true));
            bos.Add ("string+float",   new BinOpStr (typeof (string), BinOpStrStrAddStr, true));
            bos.Add ("string+integer", new BinOpStr (typeof (string), BinOpStrStrAddStr, true));

            // Now for our final slight-of-hand, we're going to scan through all those.
            // And wherever we see an 'integer' in the key, we are going to make another
            // entry with 'bool', as we want to accept a bool as having a value of 0 or 1.
            // This lets us do things like 3.5 * (x > 0).

            Dictionary<string, BinOpStr> bos2 = new Dictionary<string, BinOpStr> ();
            foreach (KeyValuePair<string, BinOpStr> kvp in bos) {
                string   key = kvp.Key;
                BinOpStr val = kvp.Value;
                bos2.Add (key, val);
            }
            Regex wordReg = new Regex("\\w+");
            Regex opReg = new Regex("\\W+");
            foreach (KeyValuePair<string, BinOpStr> kvp in bos) {
                string   key  = kvp.Key;
                BinOpStr val  = kvp.Value;
                MatchCollection matches = wordReg.Matches(key);
                if (matches.Count != 2)
                    continue;
                Match opM = opReg.Match(key);
                if (!opM.Success)
                    continue;
                string left = matches[0].Value;
                string right = matches[1].Value;
                string op = opM.Value;
                string key2;
                if (left == "integer" && right == "integer")
                {
                    key2 = "bool"+op+"bool";
                    if (!bos2.ContainsKey (key2)) bos2.Add (key2, val);
                    key2 = "bool"+op+"integer";
                    if (!bos2.ContainsKey (key2)) bos2.Add (key2, val);
                    key2 = "integer"+op+"bool";
                    if (!bos2.ContainsKey (key2)) bos2.Add (key2, val);
                }
                else
                {
                    key2 = key.Replace("integer", "bool");
                    if (!bos2.ContainsKey (key2)) bos2.Add (key2, val);
                }
            }
            return bos2;
        }

        private static void DefineBinOpsBoolX (Dictionary<string, BinOpStr> bos, string x)
        {
            bos.Add ("bool|"  + x, new BinOpStr (typeof (int),  BinOpStrBoolOrX));
            bos.Add ("bool^"  + x, new BinOpStr (typeof (int),  BinOpStrBoolXorX));
            bos.Add ("bool&"  + x, new BinOpStr (typeof (int),  BinOpStrBoolAndX));
            bos.Add ("bool==" + x, new BinOpStr (typeof (bool), BinOpStrBoolEqX));
            bos.Add ("bool!=" + x, new BinOpStr (typeof (bool), BinOpStrBoolNeX));
        }

        private static void DefineBinOpsXBool (Dictionary<string, BinOpStr> bos, string x)
        {
            bos.Add (x + "|bool",  new BinOpStr (typeof (int),  BinOpStrBoolOrX));
            bos.Add (x + "^bool",  new BinOpStr (typeof (int),  BinOpStrBoolXorX));
            bos.Add (x + "&bool",  new BinOpStr (typeof (int),  BinOpStrBoolAndX));
            bos.Add (x + "==bool", new BinOpStr (typeof (bool), BinOpStrBoolEqX));
            bos.Add (x + "!=bool", new BinOpStr (typeof (bool), BinOpStrBoolNeX));
        }

        private static void DefineBinOpsFloatX (Dictionary<string, BinOpStr> bos, string x)
        {
            bos.Add ("float==" + x, new BinOpStr (typeof (bool),        BinOpStrFloatEqX));
            bos.Add ("float!=" + x, new BinOpStr (typeof (bool),        BinOpStrFloatNeX));
            bos.Add ("float<"  + x, new BinOpStr (typeof (bool),        BinOpStrFloatLtX));
            bos.Add ("float<=" + x, new BinOpStr (typeof (bool),        BinOpStrFloatLeX));
            bos.Add ("float>"  + x, new BinOpStr (typeof (bool),        BinOpStrFloatGtX));
            bos.Add ("float>=" + x, new BinOpStr (typeof (bool),        BinOpStrFloatGeX));
            bos.Add ("float+"  + x, new BinOpStr (typeof (double), BinOpStrFloatAddX, true));
            bos.Add ("float-"  + x, new BinOpStr (typeof (double), BinOpStrFloatSubX, true));
            bos.Add ("float*"  + x, new BinOpStr (typeof (double), BinOpStrFloatMulX, true));
            bos.Add ("float/"  + x, new BinOpStr (typeof (double), BinOpStrFloatDivX, true));
            bos.Add ("float%"  + x, new BinOpStr (typeof (double), BinOpStrFloatModX, true));
        }

        private static void DefineBinOpsXFloat (Dictionary<string, BinOpStr> bos, string x)
        {
            bos.Add (x + "==float", new BinOpStr (typeof (bool),        BinOpStrXEqFloat));
            bos.Add (x + "!=float", new BinOpStr (typeof (bool),        BinOpStrXNeFloat));
            bos.Add (x + "<float",  new BinOpStr (typeof (bool),        BinOpStrXLtFloat));
            bos.Add (x + "<=float", new BinOpStr (typeof (bool),        BinOpStrXLeFloat));
            bos.Add (x + ">float",  new BinOpStr (typeof (bool),        BinOpStrXGtFloat));
            bos.Add (x + ">=float", new BinOpStr (typeof (bool),        BinOpStrXGeFloat));
            bos.Add (x + "+float",  new BinOpStr (typeof (double), BinOpStrXAddFloat, true));
            bos.Add (x + "-float",  new BinOpStr (typeof (double), BinOpStrXSubFloat, true));
            bos.Add (x + "*float",  new BinOpStr (typeof (double), BinOpStrXMulFloat, true));
            bos.Add (x + "/float",  new BinOpStr (typeof (double), BinOpStrXDivFloat, true));
            bos.Add (x + "%float",  new BinOpStr (typeof (double), BinOpStrXModFloat, true));
        }

        private static void DefineBinOpsChar (Dictionary<string, BinOpStr> bos)
        {
            bos.Add ("char==char",   new BinOpStr (typeof (bool), BinOpStrCharEqChar));
            bos.Add ("char!=char",   new BinOpStr (typeof (bool), BinOpStrCharNeChar));
            bos.Add ("char<char",    new BinOpStr (typeof (bool), BinOpStrCharLtChar));
            bos.Add ("char<=char",   new BinOpStr (typeof (bool), BinOpStrCharLeChar));
            bos.Add ("char>char",    new BinOpStr (typeof (bool), BinOpStrCharGtChar));
            bos.Add ("char>=char",   new BinOpStr (typeof (bool), BinOpStrCharGeChar));
            bos.Add ("char+integer", new BinOpStr (typeof (char), BinOpStrCharAddInt, true));
            bos.Add ("char-integer", new BinOpStr (typeof (char), BinOpStrCharSubInt, true));
            bos.Add ("char-char",    new BinOpStr (typeof (int),  BinOpStrCharSubChar));
        }

        private static void DefineBinOpsInteger (Dictionary<string, BinOpStr> bos)
        {
            bos.Add ("integer==integer", new BinOpStr (typeof (bool), BinOpStrIntEqInt));
            bos.Add ("integer!=integer", new BinOpStr (typeof (bool), BinOpStrIntNeInt));
            bos.Add ("integer<integer",  new BinOpStr (typeof (bool), BinOpStrIntLtInt));
            bos.Add ("integer<=integer", new BinOpStr (typeof (bool), BinOpStrIntLeInt));
            bos.Add ("integer>integer",  new BinOpStr (typeof (bool), BinOpStrIntGtInt));
            bos.Add ("integer>=integer", new BinOpStr (typeof (bool), BinOpStrIntGeInt));
            bos.Add ("integer|integer",  new BinOpStr (typeof (int),  BinOpStrIntOrInt,  true));
            bos.Add ("integer^integer",  new BinOpStr (typeof (int),  BinOpStrIntXorInt, true));
            bos.Add ("integer&integer",  new BinOpStr (typeof (int),  BinOpStrIntAndInt, true));
            bos.Add ("integer+integer",  new BinOpStr (typeof (int),  BinOpStrIntAddInt, true));
            bos.Add ("integer-integer",  new BinOpStr (typeof (int),  BinOpStrIntSubInt, true));
            bos.Add ("integer*integer",  new BinOpStr (typeof (int),  BinOpStrIntMulInt, true));
            bos.Add ("integer/integer",  new BinOpStr (typeof (int),  BinOpStrIntDivInt, true));
            bos.Add ("integer%integer",  new BinOpStr (typeof (int),  BinOpStrIntModInt, true));
            bos.Add ("integer<<integer", new BinOpStr (typeof (int),  BinOpStrIntShlInt, true));
            bos.Add ("integer>>integer", new BinOpStr (typeof (int),  BinOpStrIntShrInt, true));
        }

        private static void DefineBinOpsKeyX (Dictionary<string, BinOpStr> bos, string x)
        {
            bos.Add ("key==" + x, new BinOpStr (typeof (bool), BinOpStrKeyEqX));
            bos.Add ("key!=" + x, new BinOpStr (typeof (bool), BinOpStrKeyNeX));
        }

        private static void DefineBinOpsXKey (Dictionary<string, BinOpStr> bos, string x)
        {
            bos.Add (x + "==key", new BinOpStr (typeof (bool), BinOpStrKeyEqX));
            bos.Add (x + "!=key", new BinOpStr (typeof (bool), BinOpStrKeyNeX));
        }

        private static void DefineBinOpsList (Dictionary<string, BinOpStr> bos)
        {
            bos.Add ("list+float",     new BinOpStr (typeof (LSL_List), BinOpStrListAddFloat, true));
            bos.Add ("list+integer",   new BinOpStr (typeof (LSL_List), BinOpStrListAddInt,   true));
            bos.Add ("list+key",       new BinOpStr (typeof (LSL_List), BinOpStrListAddKey,   true));
            bos.Add ("list+list",      new BinOpStr (typeof (LSL_List), BinOpStrListAddList,  true));
            bos.Add ("list+rotation",  new BinOpStr (typeof (LSL_List), BinOpStrListAddRot,   true));
            bos.Add ("list+string",    new BinOpStr (typeof (LSL_List), BinOpStrListAddStr,   true));
            bos.Add ("list+vector",    new BinOpStr (typeof (LSL_List), BinOpStrListAddVec,   true));

            bos.Add ("float+list",     new BinOpStr (typeof (LSL_List), BinOpStrFloatAddList));
            bos.Add ("integer+list",   new BinOpStr (typeof (LSL_List), BinOpStrIntAddList));
            bos.Add ("key+list",       new BinOpStr (typeof (LSL_List), BinOpStrKeyAddList));
            bos.Add ("rotation+list",  new BinOpStr (typeof (LSL_List), BinOpStrRotAddList));
            bos.Add ("string+list",    new BinOpStr (typeof (LSL_List), BinOpStrStrAddList));
            bos.Add ("vector+list",    new BinOpStr (typeof (LSL_List), BinOpStrVecAddList));

            bos.Add ("list==list",     new BinOpStr (typeof (bool), BinOpStrListEqList));
            bos.Add ("list!=list",     new BinOpStr (typeof (int),  BinOpStrListNeList));
        }

        // all operations allowed by LSL_Rotation definition
        private static void DefineBinOpsRotation (Dictionary<string, BinOpStr> bos)
        {
            bos.Add ("rotation==rotation", new BinOpStr (typeof (bool),         BinOpStrRotEqRot));
            bos.Add ("rotation!=rotation", new BinOpStr (typeof (bool),         BinOpStrRotNeRot));
            bos.Add ("rotation+rotation",  new BinOpStr (typeof (LSL_Rotation), BinOpStrRotAddRot, true));
            bos.Add ("rotation-rotation",  new BinOpStr (typeof (LSL_Rotation), BinOpStrRotSubRot, true));
            bos.Add ("rotation*rotation",  new BinOpStr (typeof (LSL_Rotation), BinOpStrRotMulRot, true));
            bos.Add ("rotation/rotation",  new BinOpStr (typeof (LSL_Rotation), BinOpStrRotDivRot, true));
        }

        private static void DefineBinOpsString (Dictionary<string, BinOpStr> bos)
        {
            bos.Add ("string==string", new BinOpStr (typeof (bool),   BinOpStrStrEqStr));
            bos.Add ("string!=string", new BinOpStr (typeof (bool),   BinOpStrStrNeStr));
            bos.Add ("string<string",  new BinOpStr (typeof (bool),   BinOpStrStrLtStr));
            bos.Add ("string<=string", new BinOpStr (typeof (bool),   BinOpStrStrLeStr));
            bos.Add ("string>string",  new BinOpStr (typeof (bool),   BinOpStrStrGtStr));
            bos.Add ("string>=string", new BinOpStr (typeof (bool),   BinOpStrStrGeStr));
            bos.Add ("string+string",  new BinOpStr (typeof (string), BinOpStrStrAddStr, true));
        }

        // all operations allowed by LSL_Vector definition
        private static void DefineBinOpsVector (Dictionary<string, BinOpStr> bos)
        {
            bos.Add ("vector==vector",  new BinOpStr (typeof (bool),        BinOpStrVecEqVec));
            bos.Add ("vector!=vector",  new BinOpStr (typeof (bool),        BinOpStrVecNeVec));
            bos.Add ("vector+vector",   new BinOpStr (typeof (LSL_Vector),  BinOpStrVecAddVec, true));
            bos.Add ("vector-vector",   new BinOpStr (typeof (LSL_Vector),  BinOpStrVecSubVec, true));
            bos.Add ("vector*vector",   new BinOpStr (typeof (double), BinOpStrVecMulVec));
            bos.Add ("vector%vector",   new BinOpStr (typeof (LSL_Vector),  BinOpStrVecModVec, true));

            bos.Add ("vector*float",    new BinOpStr (typeof (LSL_Vector),  BinOpStrVecMulFloat, true));
            bos.Add ("float*vector",    new BinOpStr (typeof (LSL_Vector),  BinOpStrFloatMulVec));
            bos.Add ("vector/float",    new BinOpStr (typeof (LSL_Vector),  BinOpStrVecDivFloat, true));

            bos.Add ("vector*integer",  new BinOpStr (typeof (LSL_Vector),  BinOpStrVecMulInt, true));
            bos.Add ("integer*vector",  new BinOpStr (typeof (LSL_Vector),  BinOpStrIntMulVec));
            bos.Add ("vector/integer",  new BinOpStr (typeof (LSL_Vector),  BinOpStrVecDivInt, true));

            bos.Add ("vector*rotation", new BinOpStr (typeof (LSL_Vector),  BinOpStrVecMulRot, true));
            bos.Add ("vector/rotation", new BinOpStr (typeof (LSL_Vector),  BinOpStrVecDivRot, true));
        }

        /**
         * @brief These methods actually emit the code to perform the arithmetic.
         * @param scg    = what script we are compiling
         * @param left   = left-hand operand location in memory (type as given by BinOpStr entry)
         * @param right  = right-hand operand location in memory (type as given by BinOpStr entry)
         * @param result = result location in memory (type as given by BinOpStr entry)
         */
        private static void BinOpStrAndAnd (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeBool);
            right.PushVal (scg, errorAt, tokenTypeBool);
            scg.ilGen.Emit (errorAt, OpCodes.And);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrOrOr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeBool);
            right.PushVal (scg, errorAt, tokenTypeBool);
            scg.ilGen.Emit (errorAt, OpCodes.Or);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrBoolOrX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Or);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrBoolXorX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrBoolAndX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.And);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrBoolEqX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeBool);
            right.PushVal (scg, errorAt, tokenTypeBool);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrBoolNeX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeBool);
            right.PushVal (scg, errorAt, tokenTypeBool);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatEqX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatNeX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatLtX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatLeX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatGtX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatGeX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrFloatAddX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Add);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrFloatSubX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Sub);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrFloatMulX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Mul);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrFloatDivX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Div);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrFloatModX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Rem);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrXEqFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrXNeFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrXLtFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrXLeFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrXGtFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrXGeFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrXAddFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Add);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrXSubFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Sub);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrXMulFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Mul);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrXDivFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Div);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrXModFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Rem);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrCharEqChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrCharNeChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrCharLtChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrCharLeChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrCharGtChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrCharGeChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrCharAddInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Add);
            result.PopPost (scg, errorAt, tokenTypeChar);
        }

        private static void BinOpStrCharSubInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Sub);
            result.PopPost (scg, errorAt, tokenTypeChar);
        }

        private static void BinOpStrCharSubChar (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeChar);
            right.PushVal (scg, errorAt, tokenTypeChar);
            scg.ilGen.Emit (errorAt, OpCodes.Sub);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntEqInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrIntNeInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrIntLtInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrIntLeInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrIntGtInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrIntGeInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrIntOrInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Or);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntXorInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntAndInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.And);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntAddInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Add);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntSubInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Sub);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntMulInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Mul);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntDivInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            // note that we must allow 0x800000/-1 -> 0x80000000 for lslangtest1.lsl
            // so sign-extend the operands to 64-bit then divide and truncate result
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Conv_I8);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Conv_I8);
            scg.ilGen.Emit (errorAt, OpCodes.Div);
            scg.ilGen.Emit (errorAt, OpCodes.Conv_I4);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntModInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            // note that we must allow 0x800000%-1 -> 0 for lslangtest1.lsl
            // so sign-extend the operands to 64-bit then mod and truncate result
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Conv_I8);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Conv_I8);
            scg.ilGen.Emit (errorAt, OpCodes.Rem);
            scg.ilGen.Emit (errorAt, OpCodes.Conv_I4);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntShlInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Shl);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrIntShrInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Shr);
            result.PopPost (scg, errorAt, tokenTypeInt);
        }

        private static void BinOpStrKeyEqX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_0);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrKeyNeX (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_0);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrListAddFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddFloat);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListAddInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddInt);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListAddKey (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddKey);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListAddRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddRot);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListAddStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddStr);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListAddVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListAddVec);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrFloatAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethFloatAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrIntAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethIntAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrKeyAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethKeyAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrRotAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrStrAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethStrAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrVecAddList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecAddList);
            result.PopPost (scg, errorAt, tokenTypeList);
        }

        private static void BinOpStrListEqList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListEqList);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrListNeList (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeList);
            right.PushVal (scg, errorAt, tokenTypeList);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethListNeList);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrRotEqRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotEqRot);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrRotNeRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotNeRot);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrRotAddRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotAddRot);
            result.PopPost (scg, errorAt, tokenTypeRot);
        }

        private static void BinOpStrRotSubRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotSubRot);
            result.PopPost (scg, errorAt, tokenTypeRot);
        }

        private static void BinOpStrRotMulRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotMulRot);
            result.PopPost (scg, errorAt, tokenTypeRot);
        }

        private static void BinOpStrRotDivRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeRot);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethRotDivRot);
            result.PopPost (scg, errorAt, tokenTypeRot);
        }

        private static void BinOpStrStrEqStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_0);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrStrNeStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_0);
            scg.ilGen.Emit (errorAt, OpCodes.Ceq);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Xor);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrStrLtStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_0);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrStrLeStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_1);
            scg.ilGen.Emit (errorAt, OpCodes.Clt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrStrGtStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_0);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrStrGeStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringCmpStringMethInfo);
            scg.ilGen.Emit (errorAt, OpCodes.Ldc_I4_M1);
            scg.ilGen.Emit (errorAt, OpCodes.Cgt);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        // Called by many type combinations so both operands need to be cast to strings
        private static void BinOpStrStrAddStr (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeStr);
            right.PushVal (scg, errorAt, tokenTypeStr);
            scg.ilGen.Emit (errorAt, OpCodes.Call, stringAddStringMethInfo);
            result.PopPost (scg, errorAt, tokenTypeStr);
        }

        private static void BinOpStrVecEqVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecEqVec);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrVecNeVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecNeVec);
            result.PopPost (scg, errorAt, tokenTypeBool);
        }

        private static void BinOpStrVecAddVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecAddVec);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecSubVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecSubVec);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecMulVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecMulVec);
            result.PopPost (scg, errorAt, tokenTypeFloat);
        }

        private static void BinOpStrVecModVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecModVec);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecMulFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecMulFloat);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrFloatMulVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeFloat);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethFloatMulVec);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecDivFloat (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeFloat);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecDivFloat);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecMulInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecMulInt);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrIntMulVec (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeInt);
            right.PushVal (scg, errorAt, tokenTypeVec);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethIntMulVec);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecDivInt (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeInt);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecDivInt);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecMulRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecMulRot);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        private static void BinOpStrVecDivRot (ScriptCodeGen scg, Token errorAt, CompValu left, CompValu right, CompValu result)
        {
            result.PopPre (scg, errorAt);
            left.PushVal (scg, errorAt, tokenTypeVec);
            right.PushVal (scg, errorAt, tokenTypeRot);
            scg.ilGen.Emit (errorAt, OpCodes.Call, infoMethVecDivRot);
            result.PopPost (scg, errorAt, tokenTypeVec);
        }

        /**
         * @brief These methods are called at runtime as helpers.
         *        Needed to pick up functionality defined by overloaded operators of LSL_ types.
         *        They need to be marked public or runtime says they are inaccessible.
         */
        public static LSL_List MethListAddFloat (LSL_List left, double right)
        {
            return MethListAddObj (left, new LSL_Float (right));
        }
        public static LSL_List MethListAddInt (LSL_List left, int right)
        {
            return MethListAddObj (left, new LSL_Integer (right));
        }
        public static LSL_List MethListAddKey (LSL_List left, string right)
        {
            return MethListAddObj (left, new LSL_Key (right));
        }
        public static LSL_List MethListAddRot (LSL_List left, LSL_Rotation right)
        {
            return MethListAddObj (left, right);
        }
        public static LSL_List MethListAddStr (LSL_List left, string right)
        {
            return MethListAddObj (left, new LSL_String (right));
        }
        public static LSL_List MethListAddVec (LSL_List left, LSL_Vector right)
        {
            return MethListAddObj (left, right);
        }
        public static LSL_List MethListAddObj (LSL_List left, object right)
        {
            int oldlen = left.Length;
            object[] newarr = new object[oldlen+1];
            Array.Copy (left.Data, newarr, oldlen);
            newarr[oldlen] = right;
            return new LSL_List (newarr);
        }

        public static LSL_List MethListAddList (LSL_List left, LSL_List right)
        {
            int leftlen = left.Length;
            int ritelen = right.Length;
            object[] newarr = new object[leftlen+ritelen];
            Array.Copy (left.Data, newarr, leftlen);
            Array.Copy (right.Data, 0, newarr, leftlen, ritelen);
            return new LSL_List (newarr);
        }

        public static LSL_List MethFloatAddList (double left, LSL_List right)
        {
            return MethObjAddList (new LSL_Float (left), right);
        }
        public static LSL_List MethIntAddList (int left, LSL_List right)
        {
            return MethObjAddList (new LSL_Integer (left), right);
        }
        public static LSL_List MethKeyAddList (string left, LSL_List right)
        {
            return MethObjAddList (new LSL_Key (left), right);
        }
        public static LSL_List MethRotAddList (LSL_Rotation left, LSL_List right)
        {
            return MethObjAddList (left, right);
        }
        public static LSL_List MethStrAddList (string left, LSL_List right)
        {
            return MethObjAddList (new LSL_String (left), right);
        }
        public static LSL_List MethVecAddList (LSL_Vector left, LSL_List right)
        {
            return MethObjAddList (left, right);
        }
        public static LSL_List MethObjAddList (object left, LSL_List right)
        {
            int oldlen = right.Length;
            object[] newarr = new object[oldlen+1];
            newarr[0] = left;
            Array.Copy (right.Data, 0, newarr, 1, oldlen);
            return new LSL_List (newarr);
        }

        public static bool MethListEqList (LSL_List left, LSL_List right)
        {
            return left == right;
        }

        // According to http://wiki.secondlife.com/wiki/LlGetListLength
        // jackassed LSL allows 'somelist != []' to get the length of a list
        public static int MethListNeList (LSL_List left, LSL_List right)
        {
            int leftlen = left.Length;
            int ritelen = right.Length;
            return leftlen - ritelen;
        }

        public static bool MethRotEqRot (LSL_Rotation left, LSL_Rotation right)
        {
            return left == right;
        }

        public static bool MethRotNeRot (LSL_Rotation left, LSL_Rotation right)
        {
            return left != right;
        }

        public static LSL_Rotation MethRotAddRot (LSL_Rotation left, LSL_Rotation right)
        {
            return left + right;
        }

        public static LSL_Rotation MethRotSubRot (LSL_Rotation left, LSL_Rotation right)
        {
            return left - right;
        }

        public static LSL_Rotation MethRotMulRot (LSL_Rotation left, LSL_Rotation right)
        {
            return left * right;
        }

        public static LSL_Rotation MethRotDivRot (LSL_Rotation left, LSL_Rotation right)
        {
            return left / right;
        }

        public static bool MethVecEqVec (LSL_Vector left, LSL_Vector right)
        {
            return left == right;
        }

        public static bool MethVecNeVec (LSL_Vector left, LSL_Vector right)
        {
            return left != right;
        }

        public static LSL_Vector MethVecAddVec (LSL_Vector left, LSL_Vector right)
        {
            return left + right;
        }

        public static LSL_Vector MethVecSubVec (LSL_Vector left, LSL_Vector right)
        {
            return left - right;
        }

        public static double MethVecMulVec (LSL_Vector left, LSL_Vector right)
        {
            return (double)(left * right).value;
        }

        public static LSL_Vector MethVecModVec (LSL_Vector left, LSL_Vector right)
        {
            return left % right;
        }

        public static LSL_Vector MethVecMulFloat (LSL_Vector left, double right)
        {
            return left * right;
        }

        public static LSL_Vector MethFloatMulVec (double left, LSL_Vector right)
        {
            return left * right;
        }

        public static LSL_Vector MethVecDivFloat (LSL_Vector left, double right)
        {
            return left / right;
        }

        public static LSL_Vector MethVecMulInt (LSL_Vector left, int right)
        {
            return left * right;
        }

        public static LSL_Vector MethIntMulVec (int left, LSL_Vector right)
        {
            return left * right;
        }

        public static LSL_Vector MethVecDivInt (LSL_Vector left, int right)
        {
            return left / right;
        }

        public static LSL_Vector MethVecMulRot (LSL_Vector left, LSL_Rotation right)
        {
            return left * right;
        }

        public static LSL_Vector MethVecDivRot (LSL_Vector left, LSL_Rotation right)
        {
            return left / right;
        }
    }
}