Changes and tweaks for the binder

Upsilon/BaseTypes/UserData/DictionaryUserData.cs

@@ -1,5 +1,6 @@
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 using Upsilon.BaseTypes.Number;
 using Upsilon.BaseTypes.ScriptTypeInterfaces;
 using Upsilon.Evaluator;
@@ -7,7 +8,7 @@ using Upsilon.Text;
 
 namespace Upsilon.BaseTypes.UserData
 {
-    internal class DictionaryUserData : ScriptType, IUserData, ILengthType
+    internal class DictionaryUserData : ScriptType, IUserData, ILengthType, IIterable
     {
         public IDictionary Dictionary { get; }
 
@@ -73,5 +74,15 @@ namespace Upsilon.BaseTypes.UserData
             return Equals((DictionaryUserData) obj);
         }
 
+        public ScriptType GetValueFromIndex(ScriptType index)
+        {
+            return Dictionary[index.ToCSharpObject()].ToScriptType();
+        }
+
+        public IEnumerator<ScriptType> GetScriptEnumerator()
+        {
+            return (from object key in Dictionary.Keys
+                select key.ToScriptType()).GetEnumerator();
+        }
     }
 }

Upsilon/BaseTypes/UserData/ListUserData.cs

@@ -11,7 +11,7 @@ namespace Upsilon.BaseTypes.UserData
 {
     internal class ListUserData : ScriptType, IUserData, IIterable, ILengthType
     {
-        private IList List { get; }
+        public IList List { get; }
 
         public ListUserData(IList list)
         {

Upsilon/BaseTypes/UserData/UpsilonBinder.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections;
+using System.Collections.Generic;
 using System.Globalization;
+using System.Linq;
 using System.Reflection;
 using Upsilon.BaseTypes.Number;
 using Upsilon.BaseTypes.ScriptTypeInterfaces;
@@ -141,12 +143,6 @@ namespace Upsilon.BaseTypes.UserData
                         return Convert.ChangeType(numeric.ToCSharpObject(), typeCode);
                     }
                     break;
-                case TypeCode.Object:
-                    if (value is ScriptType t)
-                    {
-                        return t.ToCSharpObject();
-                    }
-                    break;
             }
 
             if (value is ScriptNull)
@@ -154,6 +150,44 @@ namespace Upsilon.BaseTypes.UserData
                 return null;
             }
 
+            var valueType = value.GetType();
+            if (type == typeof(IIterable))
+            {
+                if (typeof(IDictionary).IsAssignableFrom(valueType))
+                {
+                    return new DictionaryUserData((IDictionary) value);
+                }
+                if (typeof(IList).IsAssignableFrom(valueType))
+                {
+                    return new ListUserData((IList) value);
+                }
+            }
+
+            if (typeof(IDictionary).IsAssignableFrom(type))
+            {
+                if (value is DictionaryUserData d)
+                    return d.Dictionary;
+                if (value is ScriptTable.ScriptTable table)
+                {
+                    var generics = type.GetGenericArguments();
+                    var d1 = typeof(Dictionary<,>);
+                    var requiredDictionaryType = d1.MakeGenericType(typeof(string), generics[1]);
+                    var dictionary = (IDictionary)Activator.CreateInstance(requiredDictionaryType);
+                    foreach (var variable in table.EvaluationScope.Variables)
+                    {
+                        dictionary.Add(variable.Key, variable.Value.ToCSharpObject());
+                    }
+                    return dictionary;
+                }
+            }
+            if (typeof(IList).IsAssignableFrom(type))
+            {
+                if (value is ListUserData d)
+                    return d.List;
+                if (value is ScriptTable.ScriptTable table)
+                    return table.EvaluationScope.Variables.Select(x => x.Value.ToCSharpObject());
+            }
+
             var isScriptTypeRequired = typeof(ScriptType).IsAssignableFrom(type);
             var isScriptType = value is ScriptType;
             if (!isScriptTypeRequired && isScriptType)
@@ -166,18 +200,6 @@ namespace Upsilon.BaseTypes.UserData
                 return value.ToScriptType();
             }
 
-            if (type == typeof(IIterable))
-            {
-                var valueType = value.GetType();
-                if (typeof(IDictionary).IsAssignableFrom(valueType))
-                {
-                    return new DictionaryUserData((IDictionary) value);
-                }
-                if (typeof(IList).IsAssignableFrom(valueType))
-                {
-                    return new ListUserData((IList) value);
-                }
-            }
 
             return value;
         }