Enable processing of For Loops.

Axiom.Core/Interpreter/CodeRunner.cs

@@ -29,10 +29,12 @@ namespace Axiom.Interpreter
       symbolTable=new SymbolTable();
 			IsInError=false;
     }
+
     ~CodeRunner()
     {
       Dispose(false);
     }
+
     public void Dispose()
     {
       if (!disposed)
@@ -41,6 +43,7 @@ namespace Axiom.Interpreter
         GC.SuppressFinalize(this);
       }
     }
+
     protected virtual void Dispose(bool disposing)
     {
       if(disposing)
@@ -53,32 +56,40 @@ namespace Axiom.Interpreter
       }
       disposed = true;
     }
+
     public int ParseSymbolsCount
     {
       get{return parseSymbolCount;}
     }
+
     public String LastMessage{ get; private set;}
+
 		public bool IsInError { get; private set;}
+
     public bool ScanStrict
     {
       get{return scanStrict;}
       set{scanStrict=value;}
     }
+
     public bool ParseStrict
     {
       get{return parseStrict;}
       set{parseStrict=value;}
     }
+
     public bool Trace
     {
       get {return trace;}
       set {trace=value;}
     }
+
     public bool UseCache
     {
       get { return useCache; }
       set { useCache = value; }
     }
+
     public String GetValue(String name)
     {
       if (!symbolTable.ContainsKey(name)) return "null";
@@ -87,6 +98,7 @@ namespace Axiom.Interpreter
       if (null == genericData || genericData.IsNull()) return "null";
       return genericData.Get<String>();
     }
+
     public T GetValue<T>(String name)
     {
       if(!symbolTable.ContainsKey(name)) return default(T);
@@ -95,20 +107,24 @@ namespace Axiom.Interpreter
       if(null==genericData||genericData.IsNull()) return default(T);
       return genericData.Get<T>();
     }
+
     public SymbolTable SymbolTable
     {
       get {return symbolTable;}
     }
+
     public void Reset()
     {
       if (null == symbolTable) return;
       symbolTable.Reset();
     }
+
     public bool Execute(DataTable dataTable, int row, String expression)
     {
       Reset();
       return ExecuteExpressionOnRow(dataTable, row, expression);
     }
+
     private bool ExecuteExpressionOnRow(DataTable dataTable, int row, String expression)
     {
       symbolTable.AddUserSymbols(dataTable);                                         // add symbol names from the data table columns
@@ -123,6 +139,13 @@ namespace Axiom.Interpreter
       }
       return true;
     }
+
+    /// <summary>
+    ///  Execute - Executes the given expression.  You can then use the helper methods.
+    ///  GetValue(String), GetValue<T>(String) to retrieve resulting variables from the symbolTable  
+    /// </summary>
+    /// <param name="expression"></param>
+    /// <returns></returns>
     public bool Execute(String expression)
     {
       BinaryReader binaryReader = null;
@@ -161,7 +184,7 @@ namespace Axiom.Interpreter
           logger.ErrorFormat(LastMessage);
           return false;
         }
-        parserWriter.BaseStream.Seek(0, SeekOrigin.Begin);
+        parserWriter.BaseStream.Seek(0, SeekOrigin.Begin);            // SEEK TO THE BEGINNING OF THE CODE
         assemblerReader = new BinaryReader(parserWriter.BaseStream);
         assembler = new Assembler(assemblerReader, symbolTable);
         assembler.Debug = Trace;
@@ -196,6 +219,11 @@ namespace Axiom.Interpreter
       }
     }
 
+    /// <summary>
+    /// Disassemble - This method does not execute code.  It scans, parses, and disassembles the geenrated bytecode
+    /// </summary>
+    /// <param name="expression"></param>
+    /// <returns></returns>
     public List<String> Disassemble(String expression)
     {
       BinaryReader binaryReader = null;
@@ -210,9 +238,10 @@ namespace Axiom.Interpreter
       {
 			  IsInError=false;
 				LastMessage="";
+        SymbolTable localSymbolTable = new SymbolTable();
         binaryReader = new BinaryReader(Utility.StreamFromString(expression));
         binaryWriter = new BinaryWriter(new MemoryStream());
-        Scanner scanner = new Scanner(binaryReader, binaryWriter, symbolTable);
+        Scanner scanner = new Scanner(binaryReader, binaryWriter, localSymbolTable);
         scanner.Debug = Trace;
         if (!scanner.Analyze())
         {
@@ -224,7 +253,7 @@ namespace Axiom.Interpreter
         binaryWriter.BaseStream.Seek(0, SeekOrigin.Begin);
         parserReader = new BinaryReader(binaryWriter.BaseStream);
         parserWriter = new BinaryWriter(new MemoryStream());
-        Parser parser = new Parser(parserReader, parserWriter, symbolTable);
+        Parser parser = new Parser(parserReader, parserWriter, localSymbolTable);
         parser.Debug = Trace;
         parser.Parse();
         parseSymbolCount=parser.ParseSymbolsCount;
@@ -237,7 +266,7 @@ namespace Axiom.Interpreter
         }
         parserWriter.BaseStream.Seek(0, SeekOrigin.Begin);
         assemblerReader = new BinaryReader(parserWriter.BaseStream);
-        assembler = new Assembler(assemblerReader, symbolTable);
+        assembler = new Assembler(assemblerReader, localSymbolTable);
         assembler.Debug = Trace;
         return assembler.Disassemble();
       }
@@ -412,7 +441,7 @@ namespace Axiom.Interpreter
     {
       logger.Info("********************************************************* O U T P U T ************************************************");
       List<Symbol> list = new List<Symbol>(symbolTable.Values);
-      list = (from Symbol symbol in list where symbol.TypeOfSymbol.Equals(Symbol.SymbolType.UserSymbol) select symbol).ToList();
+//      list = (from Symbol symbol in list where symbol.TypeOfSymbol.Equals(Symbol.SymbolType.UserSymbol) select symbol).ToList();
       foreach (Symbol symbol in list)
       {
         logger.Info(String.Format("SYMBOL NAME:'{0}',VALUE:'{1}'", symbol.SymbolName, null == symbol.GenericData ? "<null>" : symbol.GenericData.ToString()));