/// <summary>
 /// Creates a new ThrowTypeErrorFunction instance.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="message"> The TypeError message. </param>
 internal ThrowTypeErrorFunction(ObjectInstance prototype, string message)
     : base(prototype)
 {
     this.FastSetProperty("length", 0);
     this.IsExtensible = false;
     this.message = message;
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new DataView instance.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="buffer"> An existing ArrayBuffer to use as the storage for the new
 /// DataView object. </param>
 /// <param name="byteOffset"> The offset, in bytes, to the first byte in the specified
 /// buffer for the new view to reference. If not specified, the view of the buffer will
 /// start with the first byte. </param>
 /// <param name="byteLength"> The number of elements in the byte array. If unspecified,
 /// length of the view will match the buffer's length. </param>
 internal DataViewInstance(ObjectInstance prototype, ArrayBufferInstance buffer, int byteOffset, int byteLength)
     : base(prototype)
 {
     this.buffer = buffer;
     this.byteOffset = byteOffset;
     this.byteLength = byteLength;
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new JSON object.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 internal JSONObject(ObjectInstance prototype)
     : base(prototype)
 {
     var properties = GetDeclarativeProperties(Engine);
     properties.Add(new PropertyNameAndValue(Engine.Symbol.ToStringTag, "JSON", PropertyAttributes.Configurable));
     FastSetProperties(properties);
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a function which calls a .NET method, with no name or length.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="call"> The delegate to call when calling the JS method. </param>
 internal ClrStubFunction(ObjectInstance prototype, Func<ScriptEngine, object, object[], object> call)
     : base(prototype)
 {
     // Let's not even bother with setting the name and length!
     // Use sparingly.
     this.callBinder = call;
 }

 /// <summary>
 /// Initializes a new instance of the <see cref="LoaderInstance"/> class.
 /// </summary>
 /// <param name="prototype">The prototype.</param>
 /// <param name="scriptRunner">The script runner.</param>
 public LoaderInstance(ObjectInstance prototype, ScriptRunner scriptRunner)
     : base(prototype)
 {
     this.scriptRunner = scriptRunner;
     this.webClient = new WebClient();
     this.PopulateFunctions();
 }

 public void AddObject(string name, ObjectInstance obj)
 {
     if(name != null && obj != null)
     {
         engine.SetGlobalValue(name, obj);
     }
 }

        //     INITIALIZATION
        //_________________________________________________________________________________________

        /// <summary>
        /// Creates a new instance of a built-in constructor function.
        /// </summary>
        /// <param name="prototype"> The next object in the prototype chain. </param>
        /// <param name="name"> The name of the function. </param>
        /// <param name="instancePrototype">  </param>
        protected ClrFunction(ObjectInstance prototype, string name, ObjectInstance instancePrototype)
            : base(prototype)
        {
            if (name == null)
                throw new ArgumentNullException("name");
            if (instancePrototype == null)
                throw new ArgumentNullException("instancePrototype");

            // This is a constructor so ignore the "this" parameter when the function is called.
            thisBinding = this;

            // Search through every method in this type looking for [JSCallFunction] and [JSConstructorFunction] attributes.
            var callBinderMethods = new List<JSBinderMethod>(1);
            var constructBinderMethods = new List<JSBinderMethod>(1);
            var methods = this.GetType().GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly);
            foreach (var method in methods)
            {
                // Search for the [JSCallFunction] and [JSConstructorFunction] attributes.
                var callAttribute = (JSCallFunctionAttribute) Attribute.GetCustomAttribute(method, typeof(JSCallFunctionAttribute));
                var constructorAttribute = (JSConstructorFunctionAttribute)Attribute.GetCustomAttribute(method, typeof(JSConstructorFunctionAttribute));

                // Can't declare both attributes.
                if (callAttribute != null && constructorAttribute != null)
                    throw new InvalidOperationException("Methods cannot be marked with both [JSCallFunction] and [JSConstructorFunction].");

                if (callAttribute != null)
                {
                    // Method is marked with [JSCallFunction]
                    callBinderMethods.Add(new JSBinderMethod(method, callAttribute.Flags));
                }
                else if (constructorAttribute != null)
                {
                    var binderMethod = new JSBinderMethod(method, constructorAttribute.Flags);
                    constructBinderMethods.Add(binderMethod);
                    
                    // Constructors must return ObjectInstance or a derived type.
                    if (typeof(ObjectInstance).IsAssignableFrom(binderMethod.ReturnType) == false)
                        throw new InvalidOperationException(string.Format("Constructors must return {0} (or a derived type).", typeof(ObjectInstance).Name));
                }
            }

            // Initialize the Call function.
            if (callBinderMethods.Count > 0)
                this.callBinder = new JSBinder(callBinderMethods);
            else
                this.callBinder = new JSBinder(new JSBinderMethod(new Func<object>(() => Undefined.Value).Method));

            // Initialize the Construct function.
            if (constructBinderMethods.Count > 0)
                this.constructBinder = new JSBinder(constructBinderMethods);
            else
                this.constructBinder = new JSBinder(new JSBinderMethod(new Func<ObjectInstance>(() => this.Engine.Object.Construct()).Method));

            // Add function properties.
            this.FastSetProperty("name", name);
            this.FastSetProperty("length", this.callBinder.FunctionLength);
            this.FastSetProperty("prototype", instancePrototype);
            instancePrototype.FastSetProperty("constructor", this, PropertyAttributes.NonEnumerable);
        }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new Boolean object.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 internal BooleanConstructor(ObjectInstance prototype)
     : base(prototype, __STUB__Construct, __STUB__Call)
 {
     // Initialize the constructor properties.
     var properties = new List<PropertyNameAndValue>(3);
     InitializeConstructorProperties(properties, "Boolean", 1, BooleanInstance.CreatePrototype(Engine, this));
     FastSetProperties(properties);
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new map constructor.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 internal WeakMapConstructor(ObjectInstance prototype)
     : base(prototype, __STUB__Construct, __STUB__Call)
 {
     // Initialize the constructor properties.
     var properties = new List<PropertyNameAndValue>();
     InitializeConstructorProperties(properties, "WeakMap", 0, WeakMapInstance.CreatePrototype(Engine, this));
     FastSetProperties(properties);
 }

        /// <summary>
        /// Initializes a new instance of the <see cref="JsEventObject"/> class.
        /// </summary>
        /// <param name="prototype">The prototype.</param>
        /// <param name="runner">The runner.</param>
        public JsEventObject(ObjectInstance prototype, ScriptRunner runner)
            : base(prototype)
        {
            this.runner = runner;
            this.events = new Dictionary<string, List<FunctionInstance>>();

            PopulateFunctions(typeof(JsEventObject));
        }

 /// <summary>
 /// Creates a new ThrowTypeErrorFunction instance.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="message"> The TypeError message. </param>
 internal ThrowTypeErrorFunction(ObjectInstance prototype, string message)
     : base(prototype)
 {
     this.FastSetProperty("name", "ThrowTypeError", PropertyAttributes.Configurable);
     this.FastSetProperty("length", 0, PropertyAttributes.Configurable);
     this.IsExtensible = false;
     this.message = message;
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new Object object.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="instancePrototype"> The prototype for instances created by this function. </param>
 internal ObjectConstructor(ObjectInstance prototype, ObjectInstance instancePrototype)
     : base(prototype, __STUB__Construct, __STUB__Call)
 {
     // Initialize the constructor properties.
     var properties = GetDeclarativeProperties(Engine);
     InitializeConstructorProperties(properties, "Object", 1, instancePrototype);
     FastSetProperties(properties);
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new set iterator.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="set"> The set to iterate over. </param>
 /// <param name="list"> The linked list to iterate over. </param>
 /// <param name="kind"> The type of values to return. </param>
 internal SetIterator(ObjectInstance prototype, SetInstance set, LinkedList<object> list, Kind kind)
     : base(prototype)
 {
     this.set = set;
     this.set.BeforeDelete += Set_BeforeDelete;
     this.list = list;
     this.kind = kind;
 }

 public XMLDocInstance(ObjectInstance prototype, string path)
     : this(prototype)
 {
     _doc = new XmlDocument();
     _path = path;
     _doc.AppendChild(_doc.CreateXmlDeclaration("1.0", null, null));
     _doc.AppendChild(_doc.CreateComment("Generated by Sphere SFML XML Content Serializer v1.0"));
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new derived error function.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="type"> The type of error, e.g. Error, RangeError, etc. </param>
 internal ErrorConstructor(ObjectInstance prototype, ErrorType type)
     : base(prototype, __STUB__Construct, __STUB__Call)
 {
     // Initialize the constructor properties.
     var properties = new List<PropertyNameAndValue>(3);
     InitializeConstructorProperties(properties, type.ToString(), 1, ErrorInstance.CreatePrototype(Engine, this, type));
     FastSetProperties(properties);
 }

 /// <summary>
 /// Creates a new string instance.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="value"> The value to initialize the instance. </param>
 public StringInstance(ObjectInstance prototype, string value)
     : base(prototype)
 {
     if (value == null)
         throw new ArgumentNullException("value");
     this.value = value;
     this.FastSetProperty("length", value.Length);
 }

 /// <summary>
 /// Initializes the prototype properties.
 /// </summary>
 /// <param name="obj"> The object to set the properties on. </param>
 /// <param name="constructor"> A reference to the constructor that owns the prototype. </param>
 internal static void InitializePrototypeProperties(ObjectInstance obj, SymbolConstructor constructor)
 {
     var engine = obj.Engine;
     var properties = GetDeclarativeProperties(engine);
     properties.Add(new PropertyNameAndValue("constructor", constructor, PropertyAttributes.NonEnumerable));
     properties.Add(new PropertyNameAndValue(engine.Symbol.ToStringTag, "Symbol", PropertyAttributes.Configurable));
     obj.FastSetProperties(properties);
 }

 /// <summary>
 /// Called by derived classes to create a new object instance.
 /// </summary>
 /// <param name="engine"> The script engine associated with this object. </param>
 /// <param name="prototype"> The next object in the prototype chain.  Can be <c>null</c>. </param>
 protected ObjectInstance(ScriptEngine engine, ObjectInstance prototype)
 {
     if (engine == null)
         throw new ArgumentNullException("engine");
     this.engine = engine;
     this.prototype = prototype;
     this.schema = engine.EmptySchema;
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new String object.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 internal StringConstructor(ObjectInstance prototype)
     : base(prototype, __STUB__Construct, __STUB__Call)
 {
     // Initialize the constructor properties.
     var properties = GetDeclarativeProperties(Engine);
     InitializeConstructorProperties(properties, "String", 1, StringInstance.CreatePrototype(Engine, this));
     FastSetProperties(properties);
 }

 //     INITIALIZATION
 //_________________________________________________________________________________________
 /// <summary>
 /// Creates a new map iterator.
 /// </summary>
 /// <param name="prototype"> The next object in the prototype chain. </param>
 /// <param name="map"> The map to iterate over. </param>
 /// <param name="list"> The linked list to iterate over. </param>
 /// <param name="kind"> The type of values to return. </param>
 internal MapIterator(ObjectInstance prototype, MapInstance map, LinkedList<KeyValuePair<object, object>> list, Kind kind)
     : base(prototype)
 {
     this.map = map;
     this.map.BeforeDelete += Map_BeforeDelete;
     this.list = list;
     this.kind = kind;
 }