C# Context.GetOptimizationLevel方法代码示例

		public virtual void InitFromContext(Context cx)
		{
			SetErrorReporter(cx.GetErrorReporter());
			languageVersion = cx.GetLanguageVersion();
			generateDebugInfo = (!cx.IsGeneratingDebugChanged() || cx.IsGeneratingDebug());
			reservedKeywordAsIdentifier = cx.HasFeature(Context.FEATURE_RESERVED_KEYWORD_AS_IDENTIFIER);
			allowMemberExprAsFunctionName = cx.HasFeature(Context.FEATURE_MEMBER_EXPR_AS_FUNCTION_NAME);
			strictMode = cx.HasFeature(Context.FEATURE_STRICT_MODE);
			warningAsError = cx.HasFeature(Context.FEATURE_WARNING_AS_ERROR);
			xmlAvailable = cx.HasFeature(Context.FEATURE_E4X);
			optimizationLevel = cx.GetOptimizationLevel();
			generatingSource = cx.IsGeneratingSource();
			activationNames = cx.activationNames;
			// Observer code generation in compiled code :
			generateObserverCount = cx.generateObserverCount;
		}

		public static ScriptableObject InitStandardObjects(Context cx, ScriptableObject scope, bool @sealed)
		{
			if (scope == null)
			{
				scope = new NativeObject();
			}
			scope.AssociateValue(LIBRARY_SCOPE_KEY, scope);
			(new ClassCache()).Associate(scope);
			BaseFunction.Init(scope, @sealed);
			NativeObject.Init(scope, @sealed);
			Scriptable objectProto = ScriptableObject.GetObjectPrototype(scope);
			// Function.prototype.__proto__ should be Object.prototype
			Scriptable functionProto = ScriptableObject.GetClassPrototype(scope, "Function");
			functionProto.SetPrototype(objectProto);
			// Set the prototype of the object passed in if need be
			if (scope.GetPrototype() == null)
			{
				scope.SetPrototype(objectProto);
			}
			// must precede NativeGlobal since it's needed therein
			NativeError.Init(scope, @sealed);
			NativeGlobal.Init(cx, scope, @sealed);
			NativeArray.Init(scope, @sealed);
			if (cx.GetOptimizationLevel() > 0)
			{
				// When optimizing, attempt to fulfill all requests for new Array(N)
				// with a higher threshold before switching to a sparse
				// representation
				NativeArray.SetMaximumInitialCapacity(200000);
			}
			NativeString.Init(scope, @sealed);
			NativeBoolean.Init(scope, @sealed);
			NativeNumber.Init(scope, @sealed);
			NativeDate.Init(scope, @sealed);
			NativeMath.Init(scope, @sealed);
			NativeJSON.Init(scope, @sealed);
			NativeWith.Init(scope, @sealed);
			NativeCall.Init(scope, @sealed);
			NativeScript.Init(scope, @sealed);
			NativeIterator.Init(scope, @sealed);
			// Also initializes NativeGenerator
			bool withXml = cx.HasFeature(Context.FEATURE_E4X) && cx.GetE4xImplementationFactory() != null;
			// define lazy-loaded properties using their class name
			new LazilyLoadedCtor(scope, "RegExp", "org.mozilla.javascript.regexp.NativeRegExp", @sealed, true);
			new LazilyLoadedCtor(scope, "Packages", "org.mozilla.javascript.NativeJavaTopPackage", @sealed, true);
			new LazilyLoadedCtor(scope, "getClass", "org.mozilla.javascript.NativeJavaTopPackage", @sealed, true);
			new LazilyLoadedCtor(scope, "JavaAdapter", "org.mozilla.javascript.JavaAdapter", @sealed, true);
			new LazilyLoadedCtor(scope, "JavaImporter", "org.mozilla.javascript.ImporterTopLevel", @sealed, true);
			new LazilyLoadedCtor(scope, "Continuation", "org.mozilla.javascript.NativeContinuation", @sealed, true);
			foreach (string packageName in GetTopPackageNames())
			{
				new LazilyLoadedCtor(scope, packageName, "org.mozilla.javascript.NativeJavaTopPackage", @sealed, true);
			}
			if (withXml)
			{
				string xmlImpl = cx.GetE4xImplementationFactory().GetImplementationClassName();
				new LazilyLoadedCtor(scope, "XML", xmlImpl, @sealed, true);
				new LazilyLoadedCtor(scope, "XMLList", xmlImpl, @sealed, true);
				new LazilyLoadedCtor(scope, "Namespace", xmlImpl, @sealed, true);
				new LazilyLoadedCtor(scope, "QName", xmlImpl, @sealed, true);
			}
			if (scope is TopLevel)
			{
				((TopLevel)scope).CacheBuiltins();
			}
			return scope;
		}

		/// <summary>Evaluates script in the given stack frame.</summary>
		/// <remarks>Evaluates script in the given stack frame.</remarks>
		private static string Do_eval(Context cx, Dim.StackFrame frame, string expr)
		{
			string resultString;
			Rhino.Debug.Debugger saved_debugger = cx.GetDebugger();
			object saved_data = cx.GetDebuggerContextData();
			int saved_level = cx.GetOptimizationLevel();
			cx.SetDebugger(null, null);
			cx.SetOptimizationLevel(-1);
			cx.SetGeneratingDebug(false);
			try
			{
				Callable script = (Callable)cx.CompileString(expr, string.Empty, 0, null);
				object result = script.Call(cx, frame.scope, frame.thisObj, ScriptRuntime.emptyArgs);
				if (result == Undefined.instance)
				{
					resultString = string.Empty;
				}
				else
				{
					resultString = ScriptRuntime.ToString(result);
				}
			}
			catch (Exception exc)
			{
				resultString = exc.Message;
			}
			finally
			{
				cx.SetGeneratingDebug(true);
				cx.SetOptimizationLevel(saved_level);
				cx.SetDebugger(saved_debugger, saved_data);
			}
			if (resultString == null)
			{
				resultString = "null";
			}
			return resultString;
		}