C# SyntaxGenerator.ObjectCreationExpression方法代码示例

        private static async Task<Document> Fix(CodeFixContext context, SyntaxNode root, SyntaxGenerator generator, SemanticModel semanticModel, CancellationToken cancellationToken)
        {
            SyntaxNode node = root.FindNode(context.Span);
            Diagnostic diagnostic = context.Diagnostics.First();
            switch (diagnostic.Properties[OperatorOverloadsHaveNamedAlternatesAnalyzer.DiagnosticKindText])
            {
                case OperatorOverloadsHaveNamedAlternatesAnalyzer.AddAlternateText:
                    SyntaxNode methodDeclaration = generator.GetDeclaration(node, DeclarationKind.Operator) ?? generator.GetDeclaration(node, DeclarationKind.ConversionOperator);
                    var operatorOverloadSymbol = (IMethodSymbol)semanticModel.GetDeclaredSymbol(methodDeclaration, cancellationToken);
                    INamedTypeSymbol typeSymbol = operatorOverloadSymbol.ContainingType;

                    // For C# the following `typeDeclarationSyntax` and `typeDeclaration` nodes are identical, but for VB they're different so in
                    // an effort to keep this as language-agnostic as possible, the heavy-handed approach is used.
                    SyntaxNode typeDeclarationSyntax = typeSymbol.DeclaringSyntaxReferences.First().GetSyntax(cancellationToken);
                    SyntaxNode typeDeclaration = generator.GetDeclaration(typeDeclarationSyntax, DeclarationKind.Class);

                    SyntaxNode addedMember;
                    ImmutableArray<SyntaxNode> bodyStatements = ImmutableArray.Create(
                        generator.ThrowStatement(generator.ObjectCreationExpression(semanticModel.Compilation.GetTypeByMetadataName("System.NotImplementedException"))));
                    if (OperatorOverloadsHaveNamedAlternatesAnalyzer.IsPropertyExpected(operatorOverloadSymbol.Name))
                    {
                        // add a property
                        addedMember = generator.PropertyDeclaration(
                            name: OperatorOverloadsHaveNamedAlternatesAnalyzer.IsTrueText,
                            type: generator.TypeExpression(SpecialType.System_Boolean),
                            accessibility: Accessibility.Public,
                            modifiers: DeclarationModifiers.ReadOnly,
                            getAccessorStatements: bodyStatements);
                    }
                    else
                    {
                        // add a method
                        ExpectedMethodSignature expectedSignature = GetExpectedMethodSignature(operatorOverloadSymbol, semanticModel.Compilation);
                        addedMember = generator.MethodDeclaration(
                            name: expectedSignature.Name,
                            parameters: expectedSignature.Parameters.Select(p => generator.ParameterDeclaration(p.Item1, generator.TypeExpression(p.Item2))),
                            returnType: generator.TypeExpression(expectedSignature.ReturnType),
                            accessibility: Accessibility.Public,
                            modifiers: expectedSignature.IsStatic ? DeclarationModifiers.Static : DeclarationModifiers.None,
                            statements: bodyStatements);
                    }

                    SyntaxNode newTypeDeclaration = generator.AddMembers(typeDeclaration, addedMember);
                    return context.Document.WithSyntaxRoot(root.ReplaceNode(typeDeclaration, newTypeDeclaration));
                case OperatorOverloadsHaveNamedAlternatesAnalyzer.FixVisibilityText:
                    SyntaxNode badVisibilityNode = generator.GetDeclaration(node, DeclarationKind.Method) ?? generator.GetDeclaration(node, DeclarationKind.Property);
                    ISymbol badVisibilitySymbol = semanticModel.GetDeclaredSymbol(badVisibilityNode, cancellationToken);
                    SymbolEditor symbolEditor = SymbolEditor.Create(context.Document);
                    ISymbol newSymbol = await symbolEditor.EditOneDeclarationAsync(badVisibilitySymbol,
                        (documentEditor, syntaxNode) => documentEditor.SetAccessibility(badVisibilityNode, Accessibility.Public)).ConfigureAwait(false);
                    Document newDocument = symbolEditor.GetChangedDocuments().Single();
                    SyntaxNode newRoot = await newDocument.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
                    return context.Document.WithSyntaxRoot(newRoot);
                default:
                    return context.Document;
            }
        }

		public static SyntaxNode GenerateThrowStatement(
			SyntaxGenerator factory,
			SemanticDocument document,
			string exceptionMetadataName,
			CancellationToken cancellationToken)
		{
			var compilation = document.SemanticModel.Compilation;
			var exceptionType = compilation.GetTypeByMetadataName(exceptionMetadataName);

			// If we can't find the Exception, we obviously can't generate anything.
			if (exceptionType == null)
			{
				return null;
			}

			var exceptionCreationExpression = factory.ObjectCreationExpression(
				exceptionType,
				SpecializedCollections.EmptyList<SyntaxNode>());

			return factory.ThrowStatement(exceptionCreationExpression);
		}

            internal static SyntaxNode CreateAnalysisMethod(SyntaxGenerator generator, string methodName, SemanticModel semanticModel)
            {
                var type = SyntaxFactory.ParseTypeName("SyntaxNodeAnalysisContext");
                var parameters = new[] { generator.ParameterDeclaration("context", type) };
                SyntaxList<SyntaxNode> statements = new SyntaxList<SyntaxNode>();
                INamedTypeSymbol notImplementedException = semanticModel.Compilation.GetTypeByMetadataName("System.NotImplementedException");
                statements = statements.Add(generator.ThrowStatement(generator.ObjectCreationExpression(notImplementedException)));

                SyntaxNode newMethodDeclaration = generator.MethodDeclaration(methodName, parameters: parameters, accessibility: Accessibility.Private, statements: statements);
                return newMethodDeclaration.WithLeadingTrivia(SyntaxFactory.ParseLeadingTrivia("// This method, which is the method that is registered within Initialize, performs the analysis of the Syntax Tree when an IfStatementSyntax Node is found. If the analysis finds an error, a diagnostic is reported").ElementAt(0), SyntaxFactory.CarriageReturnLineFeed, SyntaxFactory.ParseLeadingTrivia("// In this tutorial, this method will walk through the Syntax Tree seen in IfSyntaxTree.jpg and determine if the if-statement being analyzed has the correct spacing").ElementAt(0), SyntaxFactory.CarriageReturnLineFeed);
            }

            internal static PropertyDeclarationSyntax CreateSupportedDiagnostics(SyntaxGenerator generator, INamedTypeSymbol notImplementedException)
            {
                var type = SyntaxFactory.ParseTypeName("ImmutableArray<DiagnosticDescriptor>");
                var modifiers = DeclarationModifiers.Override;

                SyntaxList<SyntaxNode> getAccessorStatements = new SyntaxList<SyntaxNode>();

                SyntaxNode throwStatement = generator.ThrowStatement(generator.ObjectCreationExpression(notImplementedException));
                getAccessorStatements = getAccessorStatements.Add(throwStatement);

                var propertyDeclaration = generator.PropertyDeclaration("SupportedDiagnostics", type, accessibility: Accessibility.Public, modifiers: modifiers, getAccessorStatements: getAccessorStatements) as PropertyDeclarationSyntax;
                propertyDeclaration = propertyDeclaration.RemoveNode(propertyDeclaration.AccessorList.Accessors[1], 0);

                return propertyDeclaration;
            }

            internal static SyntaxNode BuildInitialize(SyntaxGenerator generator, INamedTypeSymbol notImplementedException, SyntaxList<StatementSyntax> statements, string name)
            {
                var type = SyntaxFactory.ParseTypeName("AnalysisContext");
                var parameters = new[] { generator.ParameterDeclaration(name, type) };

                if (notImplementedException != null)
                {
                    statements = statements.Add(generator.ThrowStatement(generator.ObjectCreationExpression(notImplementedException)) as StatementSyntax);
                }

                var initializeDeclaration = generator.MethodDeclaration("Initialize", parameters: parameters, accessibility: Accessibility.Public, modifiers: DeclarationModifiers.Override, statements: statements);
                return initializeDeclaration;
            }

      public Task<ClassDeclarationSyntax> GenerateClientClass(SemanticModel semanticModel, SyntaxGenerator gen, INamedTypeSymbol proxyInterface, string name, Accessibility accessibility, bool includeCancellableAsyncMethods, bool suppressWarningComments, MemberAccessibility constructorAccessibility, bool withInternalProxy)
      {
         if (name == null)
         {
            if (proxyInterface.Name.StartsWith("I"))
               name = proxyInterface.Name.Substring(1);

            if (name.EndsWith("Proxy"))
               name = name.Substring(0, name.Length - "Proxy".Length);

            if (!name.EndsWith("Client"))
               name = name + "Client";
         }

         
         SyntaxNode targetClass = gen.ClassDeclaration(name, 
            baseType: gen.TypeExpression(semanticModel.Compilation.RequireType<MarshalByRefObject>()), 
            accessibility: accessibility, 
            modifiers: DeclarationModifiers.Sealed);

         targetClass = gen.AddWarningCommentIf(!suppressWarningComments, targetClass);

         targetClass = gen.AddInterfaceType(targetClass, gen.TypeExpression(semanticModel.Compilation.GetSpecialType(SpecialType.System_IDisposable)));
         targetClass = gen.AddInterfaceType(targetClass, gen.TypeExpression(proxyInterface));

         IEnumerable<IMethodSymbol> methods = GetOperationContractMethods(semanticModel.Compilation, proxyInterface).ToArray();

         GenerationNameTable nameTable = new GenerationNameTable(methods.Select(m => m.Name).Concat(new[] { name }));


         #region Private Fields

         // ==> private IProxy m_cachedProxy;
         SyntaxNode cachedProxyField =
            gen.FieldDeclaration(nameTable[MemberNames.CachedProxyField], gen.TypeExpression(proxyInterface), Accessibility.Private, DeclarationModifiers.None)
            .PrependLeadingTrivia(gen.CreateRegionTrivia("Private Fields"));

         targetClass = gen.AddMembers(targetClass, cachedProxyField);

         // ==> private readonly Func<IProxy> m_proxyFactory;
         SyntaxNode proxyFactoryTypeExpression = gen.TypeExpression(semanticModel.Compilation.RequireTypeByMetadataName("System.Func`1").Construct(proxyInterface));

         targetClass = gen.AddMembers(targetClass, gen.FieldDeclaration(nameTable[MemberNames.ProxyFactoryField], proxyFactoryTypeExpression, Accessibility.Private, DeclarationModifiers.ReadOnly)
            .AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia());

         #endregion


         #region Constructors

         // Constructor         
         SyntaxNode constructor = gen.ConstructorDeclaration(
            parameters: new[] { gen.ParameterDeclaration("proxyFactory", proxyFactoryTypeExpression) },
            accessibility: withInternalProxy ? Accessibility.Private : ToAccessibility(constructorAccessibility)
         );

         constructor = gen.AddWarningCommentIf(!suppressWarningComments, constructor);
         constructor = constructor.PrependLeadingTrivia(gen.CreateRegionTrivia("Constructors"));

         constructor = gen.WithStatements(constructor,
            new[]
            {
               // ==> if (proxyFactory == null)
               // ==>   throw new System.ArgumentNullException("proxyFactory");
               gen.ThrowIfNullStatement("proxyFactory"),
               
               // ==> m_proxyFactory = proxyFactory
               gen.AssignmentStatement(
                  gen.MemberAccessExpression(
                     gen.ThisExpression(),
                     gen.IdentifierName(nameTable[MemberNames.ProxyFactoryField])),
                  gen.IdentifierName("proxyFactory")
               )
            }
         ).AddNewLineTrivia();

         if (!withInternalProxy)
            constructor = constructor.AddTrailingTrivia(gen.CreateEndRegionTrivia()).AddNewLineTrivia();

         targetClass = gen.AddMembers(targetClass, constructor);

         ClassDeclarationSyntax proxyClass = null;
         if (withInternalProxy)
         {
            IEnumerable<IMethodSymbol> ctors;
            proxyClass = GenerateProxyClass(semanticModel, gen, proxyInterface, nameTable[MemberNames.ProxyClass], Accessibility.Private, suppressWarningComments, MemberAccessibility.Public, out ctors)
                                                   .PrependLeadingTrivia(gen.CreateRegionTrivia("Proxy Class").Insert(0, gen.NewLine()))
                                                   .AddTrailingTrivia(gen.CreateEndRegionTrivia());

            // Generate one constructor for each of the proxy's constructors.
            foreach (var ctorEntry in ctors.AsSmartEnumerable())
            {
               var ctor = ctorEntry.Value;
               var targetCtor = gen.ConstructorDeclaration(ctor);

               var lambda = gen.ValueReturningLambdaExpression(                  
                  gen.ObjectCreationExpression(gen.IdentifierName(gen.GetName(proxyClass)), ctor.Parameters.Select(p => gen.IdentifierName(p.Name)))
               );

               targetCtor = gen.WithThisConstructorInitializer(targetCtor, new[] { lambda });
//.........这里部分代码省略.........