Represents the invoke dynamic operation at the call site, providing the binding semantic and the details about the operation.
Inheritance: DynamicMetaObjectBinder
Exemplo n.º 1
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 public override Meta BindInvoke(InvokeBinder binder, Meta[] args)
 {
     return new Meta(
         Et.Call(
             EtUtils.Cast<IFunction>(
                 this.Expression
             ),
             IFunctionMethods.MiCall,
             EtUtils.Cast<IObj>(
                 args[0].Expression
             ),
             AstUtils.NewArrayHelper(
                 typeof(object),
                 DynamicUtils.GetExpressions(
                     ArrayUtils.RemoveFirst(args)
                 )
             )
         ),
         RestrictUtils.BuildCallRestrictions(
             this,
             args,
             RestrictFlag.Type
         )
     );
 }
Exemplo n.º 2
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        internal DelegateInfo(LanguageContext context, Type returnType, ParameterInfo[] parameters) {
            Assert.NotNull(returnType);
            Assert.NotNullItems(parameters);

            _returnType = returnType;
            _parameters = parameters;

            PerfTrack.NoteEvent(PerfTrack.Categories.DelegateCreate, ToString());

            if (_returnType != typeof(void)) {
                _convertBinder = context.CreateConvertBinder(_returnType, true);
            }

            _invokeBinder = context.CreateInvokeBinder(new CallInfo(_parameters.Length));

            Type[] delegateParams = new Type[_parameters.Length];
            for (int i = 0; i < _parameters.Length; i++) {
                delegateParams[i] = _parameters[i].ParameterType;
            }

            // Create the method with a special name so the langauge compiler knows that method's stack frame is not visible
            DynamicILGen cg = Snippets.Shared.CreateDynamicMethod("_Scripting_", _returnType, ArrayUtils.Insert(typeof(object[]), delegateParams), false);

            // Emit the stub
            _constants = EmitClrCallStub(cg);
            _method = cg.Finish();
        }
Exemplo n.º 3
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 public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
 {
     output.Write(string.Format("Try invoke with {0} arguments {1} and return type is {2}",
         binder.CallInfo.ArgumentCount, string.Join(", ", binder.CallInfo.ArgumentNames), binder.ReturnType.FullName));
     var res = baseElement.TryInvoke(binder, args, out result);
     return true;
 }
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            if (binder == null) throw new ArgumentNullException("binder");

            if (Resource(args, out result))
                return true;

            if (Query(args, out result))
                return true;

            if (Extensions.IsHttpVerb(GetLastCall()))
            {
                result = HttpVerb(args);
                return true;
            }

            var builder = new StringBuilder(_callLog);
            foreach (var t in args)
            {
                builder.Append("/");
                var s = t as string;
                if (s != null)
                    builder.Append("@\"").Append(s.Replace("\"", "\"\"")).Append("\"");
                else
                    builder.Append(t);
            }

            result = new MemberAccessWrapper(_httpClientWrapper, _baseUri, builder.ToString());

            return true;
        }
Exemplo n.º 5
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        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            Console.WriteLine("TryInvoke is called");
            bool tryResult = base.TryInvoke(binder, args, out result);

            return true;

        }
Exemplo n.º 6
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        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
			var innerResult = _inner.TryInvoke(binder, args, out result);
			//special case, we need to check if the result is of a non-legacy dynamic type because if it is, we need 
			//to return the legacy type
			result = LegacyConverter.ConvertToLegacy(result);
			return innerResult;
        }
Exemplo n.º 7
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 public static ImmutableDictionary<string, object> ParseArgs(object[] args, InvokeBinder binder)
 {
     if (binder.CallInfo.ArgumentCount == 0) return Empty;
     if (binder.CallInfo.ArgumentCount == 1 && (binder.CallInfo.ArgumentNames.Count == 0 || string.IsNullOrWhiteSpace(binder.CallInfo.ArgumentNames[0])))
     {
         return ObjectToDictionary(args[0]);
     }
     return ArgsToDictionary(args, binder);
 }
Exemplo n.º 8
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 public override DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args)
 {
     return new DynamicMetaObject(
         Expression.Call(
             Expression.Constant(Function),
             typeof(BonsaiFunction).GetMethod("Call"),
             Expression.NewArrayInit(typeof(object), args.Select(a => Expression.Convert(a.Expression, typeof(object))))),
         BindingRestrictions.GetInstanceRestriction(this.Expression, Function));
 }
Exemplo n.º 9
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 /// <summary>
 /// Tries to perform binding of the dynamic invoke operation.
 /// </summary>    
 /// <param name="binder">An instance of the <see cref="GetMemberBinder"/> that represents the details of the dynamic operation.</param>
 /// <param name="instance">The target of the dynamic operation. </param>
 /// <param name="args">An array of <see cref="DynamicMetaObject"/> instances - arguments to the invoke member operation.</param>
 /// <param name="result">The new <see cref="DynamicMetaObject"/> representing the result of the binding.</param>
 /// <returns>true if operation was bound successfully; otherwise, false.</returns>
 public static bool TryBindInvoke(InvokeBinder binder, DynamicMetaObject instance, DynamicMetaObject[] args, out DynamicMetaObject result) {
     if (TryGetMetaObject(ref instance)) {
         result = instance.BindInvoke(binder, args);
         return true;
     } else {
         result = null;
         return false;
     }
 }
Exemplo n.º 10
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 public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
 {
     IodineObject[] arguments = new IodineObject[args.Length];
     for (int i = 0; i < args.Length; i++) {
         arguments [i] = typeRegistry.ConvertToIodineObject (args [i]);
     }
     IodineObject returnVal = internalObject.Invoke (internalVm, arguments);
     result = typeRegistry.ConvertToNativeObject (returnVal);
     return true;
 }
Exemplo n.º 11
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 /// <summary>
 /// Tries the invoke.
 /// </summary>
 /// <param name="binder">The binder.</param>
 /// <param name="args">The args.</param>
 /// <param name="result">The result.</param>
 /// <returns></returns>
 public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
 {
     result = null;
     if (args.Length == 1 && args.First() is String)
     {
         result = _lookup(args[0] as String);
         return true;
     }
     return false;
 }
Exemplo n.º 12
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 /// <summary>
 /// Evaluates JavaScript directly within the context of the target object.
 /// Particularly useful for expressing lambdas, but can be used to execute any JavaScript that cannot be expressed in C#.
 /// </summary>
 /// <example>
 /// var visibleText = elements("filter(e => e.visible).map(e => e.textContent)");
 /// </example>
 public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
 {
     try
     {
         var script = "this." + args.Single().ToString();
         result = target.eval(script).Result;
         if (result is ExpandoObject) result = new Bridge(result);
         return true;
     }
     catch (AggregateException e) { throw e.InnerException; }
 }
Exemplo n.º 13
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            public static DynamicMetaObject/*!*/ Bind(RubyContext/*!*/ context, InvokeBinder/*!*/ binder,
                RubyMetaObject/*!*/ target, DynamicMetaObject/*!*/[]/*!*/ args, Action<MetaObjectBuilder, CallArguments>/*!*/ buildInvoke) {

                RubyCallSignature callSignature;
                if (RubyCallSignature.TryCreate(binder.CallInfo, out callSignature)) {
                    return binder.FallbackInvoke(target, args);
                }

                var metaBuilder = new MetaObjectBuilder();
                buildInvoke(metaBuilder, new CallArguments(target.CreateMetaContext(), target, args, callSignature));
                return metaBuilder.CreateMetaObject(binder);
            }
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            result = null;

            if (args.Length > 0)
            {
                result = Evaluate(args[0].ToString());
                args.Skip(1).Select(x => x.ToString()).ToList().ForEach(Execute);                
            }
            
            return true;
        }
Exemplo n.º 15
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        public override DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args) {
            ContractUtils.RequiresNotNull(binder, "binder");

            ComMethodDesc method;
            if (_self.TryGetGetItem(out method)) {

                bool[] isByRef = ComBinderHelpers.ProcessArgumentsForCom(ref args);
                return BindComInvoke(args, method, binder.CallInfo, isByRef);
            }

            return base.BindInvoke(binder, args);
        }
Exemplo n.º 16
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Arquivo: Cmd.cs Projeto: rlaneve/cmd
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            if (!commands.Any())
            {
                result = null;
                return true;
            }

            var runOptions = new RunOptions(this);
            result = Runner.Run(runOptions);
            return true;
        }
Exemplo n.º 17
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        /// <summary>
        ///   Provides the implementation for operations that invoke an object. Classes derived from the <see
        ///    cref="T:System.Dynamic.DynamicObject" /> class can override this method to specify dynamic behavior for operations such as invoking an object or a delegate.
        /// </summary>
        /// <param name="binder"> Provides information about the invoke operation. </param>
        /// <param name="args"> The arguments that are passed to the object during the invoke operation. For example, for the sampleObject(100) operation, where sampleObject is derived from the <see
        ///    cref="T:System.Dynamic.DynamicObject" /> class, <paramref name="args" /> [0] is equal to 100. </param>
        /// <param name="result"> The result of the object invocation. </param>
        /// <returns> true if the operation is successful; otherwise, false. If this method returns false, the run-time binder of the language determines the behavior. (In most cases, a language-specific run-time exception is thrown. </returns>
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            var tCurrying = _target as Currying;

            result = tCurrying != null
                //If already currying append
                ? new Currying(tCurrying.Target, tCurrying.MemberName,
                    tCurrying.Args.Concat(Util.NameArgsIfNecessary(binder.CallInfo, args)).
                        ToArray(), tCurrying.TotalArgCount, tCurrying.InvocationKind)
                : new Currying(_target, String.Empty, Util.NameArgsIfNecessary(binder.CallInfo, args), _totalArgCount);
            return true;
        }
Exemplo n.º 18
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        public override DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args) {
            ContractUtils.RequiresNotNull(binder, "binder");

            ComMethodDesc method;
            if (_self.TryGetGetItem(out method)) {
                IList<ArgumentInfo> argInfos = binder.Arguments;
                ComBinderHelpers.ProcessArgumentsForCom(ref args, ref argInfos);

                return BindComInvoke(args, method, argInfos);
            }

            return base.BindInvoke(binder, args);
        }
Exemplo n.º 19
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        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            var names = binder.CallInfo.ArgumentNames;
            var numberOfArguments = binder.CallInfo.ArgumentCount;
            var numberOfNames = names.Count;

            var allNames = Enumerable.Repeat<string>(null, numberOfArguments - numberOfNames).Concat(names);
            arguments.AddRange(allNames.Zip(args, (flag, value) => new Argument(flag, value)));

            var runOptions = new RunOptions(this);
            result = Runner.Run(runOptions);
            return true;
        }
Exemplo n.º 20
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        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            if (args.Length > 0)
            {
                result = val + args[0];
            }
            else
            {
                result = new Goal(val + "o");
            }

            return true;
        }
Exemplo n.º 21
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        /// <summary>
        ///   Provides the implementation for operations that invoke an object. Classes derived from the <see
        ///    cref="T:System.Dynamic.DynamicObject" /> class can override this method to specify dynamic behavior for operations such as invoking an object or a delegate.
        /// </summary>
        /// <param name="binder"> Provides information about the invoke operation. </param>
        /// <param name="args"> The arguments that are passed to the object during the invoke operation. For example, for the sampleObject(100) operation, where sampleObject is derived from the <see
        ///    cref="T:System.Dynamic.DynamicObject" /> class, <paramref name="args" /> [0] is equal to 100. </param>
        /// <param name="result"> The result of the object invocation. </param>
        /// <returns> true if the operation is successful; otherwise, false. If this method returns false, the run-time binder of the language determines the behavior. (In most cases, a language-specific run-time exception is thrown. </returns>
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            IEnumerable<KeyValuePair<string, object>> tDict = null;
            object target = null;
            result = null;

            //Setup Properties as dictionary
            if (binder.CallInfo.ArgumentNames.Any()) {
                if (binder.CallInfo.ArgumentNames.Count + 1 == binder.CallInfo.ArgumentCount) {
                    target = args.First();
                    tDict = binder.CallInfo.ArgumentNames
                        .Zip(args.Skip(1), (key, value) => new {key, value})
                        .ToDictionary(k => k.key, v => v.value);
                } else {
                    throw new RuntimeBinderException("InvokeSetAll requires first parameter to be target unamed, and all other parameters to be named.");
                }
            } else if (args.Length == 2) {
                target = args[0];
                if (args[1] is IEnumerable<KeyValuePair<string, object>>) {
                    tDict = (IEnumerable<KeyValuePair<string, object>>)args[1];
                } else if (args[1] is IEnumerable
                    && args[1].GetType().IsGenericType
                    ) {
                    var tEnumerableArg = (IEnumerable)args[1];

                    var tInterface = tEnumerableArg.GetType().GetInterface("IEnumerable`1", false);
                    if (tInterface != null) {
                        var tParamTypes = tInterface.GetGenericArguments();
                        if (tParamTypes.Length == 1
                            && tParamTypes[0].GetGenericTypeDefinition() == typeof (Tuple<,>)) {
                            tDict = tEnumerableArg.Cast<dynamic>().ToDictionary(k => (string)k.Item1, v => (object)v.Item2);
                        }
                    }
                } else if (Util.IsAnonymousType(args[1])) {
                    var keyDict = new Dictionary<string, object>();
                    foreach (var tProp in args[1].GetType().GetProperties()) {
                        keyDict[tProp.Name] = Impromptu.InvokeGet(args[1], tProp.Name);
                    }
                    tDict = keyDict;
                }
            }
            //Invoke all properties
            if (target != null && tDict != null) {
                foreach (var tPair in tDict) {
                    Impromptu.InvokeSetChain(target, tPair.Key, tPair.Value);
                }
                result = target;
                return true;
            }
            return false;
        }
Exemplo n.º 22
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        internal DelegateSignatureInfo(LanguageContext context, Type returnType, ParameterInfo[] parameters) {
            Assert.NotNull(context, returnType);
            Assert.NotNullItems(parameters);

            _context = context;
            _parameters = parameters;
            _returnType = returnType;
            
            if (_returnType != typeof(void)) {
                _convert = _context.CreateConvertBinder(_returnType, true);
            }
            
            _invoke = _context.CreateInvokeBinder(new CallInfo(_parameters.Length));
        }
Exemplo n.º 23
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        public override DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args) {
            ContractUtils.RequiresNotNull(binder, "binder");

            if (args.Any(arg => ComBinderHelpers.IsStrongBoxArg(arg))) {
                return ComBinderHelpers.RewriteStrongBoxAsRef(binder, this, args, false);
            }

            ComMethodDesc method;
            if (_self.TryGetGetItem(out method)){
                return BindComInvoke(args, method, binder.Arguments);
            }

            return base.BindInvoke(binder, args);
        }
Exemplo n.º 24
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        public override DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args)
        {
            ComMethodDesc method;
            if (_self.TryGetGetItem(out method))
            {
                List<ParameterExpression> temps = new List<ParameterExpression>();
                List<Expression> initTemps = new List<Expression>();

                bool[] isByRef = ComBinderHelpers.ProcessArgumentsForCom(method, ref args, temps, initTemps);
                return BindComInvoke(args, method, binder.CallInfo, isByRef, temps, initTemps);
            }

            return base.BindInvoke(binder, args);
        }
Exemplo n.º 25
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        /// <summary>
        /// Provides the implementation for operations that invoke an object. Classes derived from the <see cref="T:System.Dynamic.DynamicObject"/> class can override this method to specify dynamic behavior for operations such as invoking an object or a delegate.
        /// </summary>
        /// <param name="binder">Provides information about the invoke operation.</param>
        /// <param name="args">The arguments that are passed to the object during the invoke operation. For example, for the sampleObject(100) operation, where sampleObject is derived from the <see cref="T:System.Dynamic.DynamicObject"/> class, <paramref name="args"/>[0] is equal to 100.</param>
        /// <param name="result">The result of the object invocation.</param>
        /// <returns>
        /// true if the operation is successful; otherwise, false. If this method returns false, the run-time binder of the language determines the behavior. (In most cases, a language-specific run-time exception is thrown.
        /// </returns>
        public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
        {
            var tCurrying = _target as PartialApplyInvocation;

            var curryResult = tCurrying != null
                //If already currying append
                          ? new PartialApplyInvocation(tCurrying.Target,
                                         tCurrying.Args.Concat(Util.NameArgsIfNecessary(binder.CallInfo, args)).
                                             ToArray(), tCurrying.MemberName, tCurrying.TotalArgCount, tCurrying.InvocationKind)
                          : new PartialApplyInvocation(_target, Util.NameArgsIfNecessary(binder.CallInfo, args), String.Empty, _totalArgCount);

            result = curryResult;
            if (args.Length == curryResult.TotalArgCount)
                result = ((dynamic)curryResult)();
            return true;
        }
Exemplo n.º 26
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            public override DynamicMetaObject/*!*/ BindInvoke(InvokeBinder/*!*/ action, DynamicMetaObject/*!*/[]/*!*/ args) {
                RubyCallSignature callSignature;
                if (RubyCallSignature.TryCreate(action.Arguments, out callSignature)) {
                    return action.FallbackInvoke(this, args);
                }

                var metaBuilder = new MetaObjectBuilder();

                var context = new DynamicMetaObject(
                    Methods.GetContextFromBlockParam.OpCall(AstUtils.Convert(Expression, typeof(BlockParam))),
                    BindingRestrictions.Empty,
                    RubyOps.GetContextFromBlockParam((BlockParam)Value)
                );

                BlockParam.SetCallActionRule(metaBuilder, new CallArguments(context, this, args, callSignature));
                return metaBuilder.CreateMetaObject(action, args);
            }
        public static IExpression Parse(Table table, object[] args, InvokeBinder binder)
        {
            if (args.Length == 1)
            {
                var expression = args[0] as IExpression;
                if (expression != null) return expression;
            }

            var dict = ReadBinder.ParseArgs(args, binder);
            var kvp = dict.FirstOrDefault();
            var column = new Column(kvp.Key, table);
            if (kvp.Value is FloatingOperand)
            {
                return ((FloatingOperand) kvp.Value).GetExpression(column);
            }
            return SimpleExpression.Equal(column, kvp.Value);
        }
Exemplo n.º 28
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            public override MetaObject/*!*/ BindInvoke(InvokeBinder/*!*/ action, MetaObject/*!*/[]/*!*/ args) {
                RubyCallSignature callSignature;
                if (RubyCallSignature.TryCreate(action.Arguments, out callSignature)) {
                    return action.FallbackInvoke(this, args);
                }

                var self = (RubyMethod)Value;

                var context = new MetaObject(
                    Methods.GetContextFromMethod.OpCall(AstUtils.Convert(Expression, typeof(RubyMethod))),
                    Restrictions.Empty,
                    RubyOps.GetContextFromMethod(self)
                );

                var metaBuilder = new MetaObjectBuilder();
                Method.SetRuleForCall(metaBuilder, new CallArguments(context, this, args, callSignature));
                return metaBuilder.CreateMetaObject(action, args);
            }
Exemplo n.º 29
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        internal DelegateSignatureInfo(LanguageContext context, Type returnType, ParameterInfo[] parameters) {
            Assert.NotNull(context, returnType);
            Assert.NotNullItems(parameters);

            _context = context;
            _parameters = parameters;
            _returnType = returnType;
            
            if (_returnType != typeof(void)) {
                _convert = _context.CreateConvertBinder(_returnType, true);
            }
            
            ArgumentInfo[] args = new ArgumentInfo[_parameters.Length];
            for (int i = 0; i < args.Length; i++) {
                args[i] = Expression.PositionalArg(i);
            }

            _invoke = _context.CreateInvokeBinder(args);
        }
Exemplo n.º 30
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 public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
 {
     IodineObject[] arguments = new IodineObject[args.Length];
     for (int i = 0; i < args.Length; i++) {
         IodineObject val = null;
         if (!IodineTypeConverter.Instance.ConvertFromPrimative (args [i], out val)) {
             if (args [i] is IodineObject) {
                 val = (IodineObject)args [i];
             } else {
                 result = null;
                 return false;
             }
         }
         arguments [i] = val;
     }
     IodineObject returnVal = internalObject.Invoke (internalVm, arguments);
     if (!IodineTypeConverter.Instance.ConvertToPrimative (returnVal, out result)) {
         result = new IodineDynamicObject (returnVal, internalVm);
     }
     return true;
 }
        public virtual new bool TryInvoke(InvokeBinder binder, Object[] args, out Object result)
        {
            result = default(Object);

            return(default(bool));
        }
Exemplo n.º 32
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 public virtual DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args)
 {
     throw new NotImplementedException();
 }
Exemplo n.º 33
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 //
 // Summary:
 //     Provides the implementation for operations that invoke an object. Classes derived
 //     from the System.Dynamic.DynamicObject class can override this method to specify
 //     dynamic behavior for operations such as invoking an object or a delegate.
 //
 // Parameters:
 //   binder:
 //     Provides information about the invoke operation.
 //
 //   args:
 //     The arguments that are passed to the object during the invoke operation. For
 //     example, for the sampleObject(100) operation, where sampleObject is derived from
 //     the System.Dynamic.DynamicObject class, args[0] is equal to 100.
 //
 //   result:
 //     The result of the object invocation.
 //
 // Returns:
 //     true if the operation is successful; otherwise, false. If this method returns
 //     false, the run-time binder of the language determines the behavior. (In most
 //     cases, a language-specific run-time exception is thrown.
 public virtual bool TryInvoke(InvokeBinder binder, object[] args, out object result);
Exemplo n.º 34
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 public virtual bool TryInvoke(InvokeBinder binder, object[] args, ref object result)
 {
     throw new NotImplementedException();
 }
Exemplo n.º 35
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 /// <summary>
 /// Performs the binding of the dynamic invoke operation.
 /// </summary>
 /// <param name="binder">An instance of the <see cref="InvokeBinder"/> that represents the details of the dynamic operation.</param>
 /// <param name="args">An array of <see cref="DynamicMetaObject"/> instances - arguments to the invoke operation.</param>
 /// <returns>The new <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
 public virtual DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args)
 {
     ArgumentNullException.ThrowIfNull(binder);
     return(binder.FallbackInvoke(this, args));
 }
Exemplo n.º 36
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 /// <summary>
 /// Performs the binding of the dynamic invoke operation.
 /// </summary>
 /// <param name="binder">An instance of the <see cref="InvokeBinder"/> that represents the details of the dynamic operation.</param>
 /// <param name="args">An array of <see cref="DynamicMetaObject"/> instances - arguments to the invoke operation.</param>
 /// <returns>The new <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
 public virtual DynamicMetaObject BindInvoke(InvokeBinder binder, DynamicMetaObject[] args)
 {
     ContractUtils.RequiresNotNull(binder, nameof(binder));
     return(binder.FallbackInvoke(this, args));
 }
Exemplo n.º 37
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 public virtual bool TryInvoke(InvokeBinder binder, object[] args, out object result)
 {
     result = null;
     return(false);
 }
Exemplo n.º 38
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        public virtual new System.Dynamic.DynamicMetaObject BindInvoke(InvokeBinder binder, System.Dynamic.DynamicMetaObject[] args)
        {
            Contract.Requires(binder != null);

            return(default(System.Dynamic.DynamicMetaObject));
        }