Jint.Native.JsFunction.Execute C# (CSharp) Method

        public virtual JsInstance Execute(IJintVisitor visitor, JsDictionaryObject that, JsInstance[] parameters)
        {
            visitor.CallFunction(this, that, parameters);
            return that;
        }

        public void ExecuteFunction(JsFunction function, JsDictionaryObject that, JsInstance[] parameters, Type[] genericParameters)
        {
            if (function == null) {
                return;
            }

            if (recursionLevel++ > MaxRecursions) {
                throw new JsException(Global.ErrorClass.New("Too many recursions in the script."));
            }

            // ecma chapter 10.
            // TODO: move creation of the activation object to the JsFunction
            // create new argument object and instantinate arguments into it
            JsArguments args = new JsArguments(Global, function, parameters);

            // create new activation object and copy instantinated arguments to it
            // Activation should be before the function.Scope hierarchy
            JsScope functionScope = new JsScope(function.Scope ?? GlobalScope);

            for (int i = 0; i < function.Arguments.Count; i++)
                if (i < parameters.Length)
                    functionScope.DefineOwnProperty(
                        new LinkedDescriptor(
                            functionScope,
                            function.Arguments[i],
                            args.GetDescriptor(i.ToString()),
                            args
                        )
                    );
                else
                    functionScope.DefineOwnProperty(
                        new ValueDescriptor(
                            functionScope,
                            function.Arguments[i],
                            JsUndefined.Instance
                        )
                    );

            // define arguments variable
            if (HasOption(Options.Strict))
                functionScope.DefineOwnProperty(JsScope.ARGUMENTS, args);
            else
                args.DefineOwnProperty(JsScope.ARGUMENTS, args);

            // set this variable
            if (that != null)
                functionScope.DefineOwnProperty(JsScope.THIS, that);
            else
                functionScope.DefineOwnProperty(JsScope.THIS, that = Global as JsObject);

            // enter activation object
            EnterScope(functionScope);

            try {
                PermissionSet.PermitOnly();

                if (genericParameters != null && genericParameters.Length > 0)
                    Result = function.Execute(this, that, parameters, genericParameters);
                else
                    Result = function.Execute(this, that, parameters);

                // Resets the return flag
                if (exit) {
                    exit = false;
                }
            }
            finally {
                // return to previous execution state
                ExitScope();

                CodeAccessPermission.RevertPermitOnly();
                recursionLevel--;
            }
        }