C# SyntaxGenerator.ParameterDeclaration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;
            }
        }

            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 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;
            }

        private static SyntaxNode CreateNewMethod(
            SyntaxGenerator generator, IMethodSymbol methodSymbol, int parameterIndex, Compilation compilation, INamedTypeSymbol uriType)
        {
            // create original parameter decl
            var originalParameter = generator.ParameterDeclaration(methodSymbol.Parameters[parameterIndex]);

            // replace original parameter type to System.Uri
            var newParameter = generator.ReplaceNode(originalParameter, generator.GetType(originalParameter), generator.TypeExpression(uriType));

            // create original method decl
            var original = generator.MethodDeclaration(methodSymbol, generator.DefaultMethodBody(compilation));

            // get parameters from original method decl
            var originalParameters = generator.GetParameters(original);

            // replace one of parameter to new one
            return generator.ReplaceNode(original, originalParameters[parameterIndex], newParameter);
        }

        private static SyntaxNode GetPropertyDeclarationSyntax(
            SyntaxGenerator syntaxGenerator,
            SemanticModel semanticModel,
            IPropertySymbol propertySymbol)
        {
            var getAccessorStatements = GetPropertyGetAccessorsSyntax(syntaxGenerator, semanticModel, propertySymbol).ToList();
            var setAccessorStatements = GetPropertySetAccessorsSyntax(syntaxGenerator, semanticModel, propertySymbol).ToList();
            var declarationModifiers = DeclarationModifiers.None;

            if (getAccessorStatements.Count == 0)
            {
                declarationModifiers = declarationModifiers.WithIsWriteOnly(true);

                // set-only properties are not currently supported
                return null;
            }

            if (setAccessorStatements.Count == 0)
            {
                declarationModifiers = declarationModifiers.WithIsReadOnly(true);
            }

            if (!propertySymbol.IsIndexer)
            {
                return syntaxGenerator
                    .PropertyDeclaration(
                        propertySymbol.Name,
                        syntaxGenerator.TypeExpression(propertySymbol.Type),
                        accessibility: Accessibility.Public,
                        modifiers: declarationModifiers,
                        getAccessorStatements: getAccessorStatements,
                        setAccessorStatements: setAccessorStatements);
            }
            else
            {
                var parameters = propertySymbol
                    .Parameters
                    .Select(x => syntaxGenerator.ParameterDeclaration(x.Name, syntaxGenerator.TypeExpression(x.Type)))
                    .ToList();

                return syntaxGenerator
                    .IndexerDeclaration(
                        parameters,
                        syntaxGenerator.TypeExpression(propertySymbol.Type),
                        accessibility: Accessibility.Public,
                        modifiers: declarationModifiers,
                        getAccessorStatements: getAccessorStatements,
                        setAccessorStatements: setAccessorStatements);
            }
        }

            // creates a method keeping everything except for the parameters, and inserting a parameter of type SyntaxNodeAnalysisContext
            protected internal static SyntaxNode CreateMethodWithContextParameter(SyntaxGenerator generator, MethodDeclarationSyntax methodDeclaration)
            {
                TypeSyntax type = SyntaxFactory.ParseTypeName("SyntaxNodeAnalysisContext");
                SyntaxNode[] parameters = new[] { generator.ParameterDeclaration("context", type) };
                string methodName = methodDeclaration.Identifier.Text;
                TypeSyntax returnType = methodDeclaration.ReturnType;
                SyntaxList<StatementSyntax> statements = methodDeclaration.Body.Statements;

                SyntaxNode newDeclaration = generator.MethodDeclaration(methodName, parameters, returnType: returnType, accessibility: Accessibility.Private, statements: statements);
                return newDeclaration;
            }

        private static SyntaxNode GetConstructorDeclarationSyntax(
            SyntaxGenerator syntaxGenerator,
            SemanticModel semanticModel,
            string name)
        {
            // GENERATED CODE:
            //
            //     public Name(MockBehavior behavior = MockBehavior.Strict)
            //         : base(behavior)
            //     {
            //         if (behavior == MockBehavior.Loose)
            //         {
            //             ConfigureLooseBehavior();
            //         }
            //     }
            var mockBehaviorType = syntaxGenerator
                .TypeExpression(
                    semanticModel
                        .Compilation
                        .GetTypeByMetadataName("PCLMock.MockBehavior"));

            return syntaxGenerator
                .ConstructorDeclaration(
                    name,
                    parameters: new[]
                    {
                        syntaxGenerator
                            .ParameterDeclaration(
                                "behavior",
                                mockBehaviorType,
                                initializer: syntaxGenerator.MemberAccessExpression(mockBehaviorType, "Strict"))
                    },
                    accessibility: Accessibility.Public,
                    baseConstructorArguments: new[] { syntaxGenerator.IdentifierName("behavior") },
                    statements: new[]
                    {
                        syntaxGenerator.IfStatement(
                            syntaxGenerator.ValueEqualsExpression(
                                syntaxGenerator.IdentifierName("behavior"),
                                syntaxGenerator.MemberAccessExpression(mockBehaviorType, "Loose")),
                                new[]
                                {
                                    syntaxGenerator.InvocationExpression(syntaxGenerator.IdentifierName("ConfigureLooseBehavior"))
                                })
                    });
        }

      private IEnumerable<SyntaxNode> CreateDisposeMethods(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool suppressWarningComments)
      {
         yield return g.AddWarningCommentIf(!suppressWarningComments,
         g.MethodDeclaration(
            "Dispose",
            accessibility: Accessibility.Public,
            statements: new SyntaxNode[]
            {
               g.InvocationExpression(
                  g.MemberAccessExpression(
                     g.ThisExpression(),
                     "Dispose"
                  ),
                  g.TrueLiteralExpression()
               ),
               g.InvocationExpression(
                  g.MemberAccessExpression(
                     g.TypeExpression(compilation.RequireTypeByMetadataName("System.GC")),
                     "SuppressFinalize"
                  ),
                  g.ThisExpression()
               )
            }
         ))
         .PrependLeadingTrivia(g.CreateRegionTrivia("IDisposable"));


         yield return g.AddWarningCommentIf(!suppressWarningComments, g.MethodDeclaration(
            "Dispose",
            parameters: new SyntaxNode[] { g.ParameterDeclaration("disposing", g.TypeExpression(SpecialType.System_Boolean)) },
            accessibility: Accessibility.Private,
            statements: new SyntaxNode[]
            {
               g.IfStatement(
                  g.ValueEqualsExpression(
                     g.IdentifierName("disposing"),
                     g.TrueLiteralExpression()
                  ),
                  new SyntaxNode[]
                  {
                     g.TryCatchStatement(
                        new SyntaxNode[]
                        {
                           g.ExpressionStatement(
                              g.InvocationExpression(
                                 g.MemberAccessExpression(
                                    g.ThisExpression(),
                                    nameTable[MemberNames.CloseProxyMethod]
                                 ),
                                 g.FalseLiteralExpression()
                              )
                           )
                        },
                        new SyntaxNode[]
                        {
                           g.CatchClause(new SyntaxNode [0])
                        }
                     )
                  }
               )
            }
         )).AddTrailingTrivia(g.CreateEndRegionTrivia());
      }

 private SyntaxNode CreateCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
 {
    return
       g.MethodDeclaration(
          asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
          returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
          parameters: new SyntaxNode[] { g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean)) },
          modifiers: asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None,
          accessibility: Accessibility.Private,
          statements: new SyntaxNode[]
          {
             g.IfStatement(
                g.ReferenceNotEqualsExpression(
                   g.IdentifierName(nameTable[MemberNames.CachedProxyField]),
                   g.NullLiteralExpression()
                ),
                new SyntaxNode[]
                {
                   g.LocalDeclarationStatement(
                      "proxy",
                      g.TryCastExpression(
                         g.MemberAccessExpression(
                            g.ThisExpression(),
                            nameTable[MemberNames.CachedProxyField]
                         ),
                         compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject")
                      )
                   ),
                   g.TryFinallyStatement(
                      new SyntaxNode[]
                      {
                         AwaitExpressionIfAsync(g, asAsync,
                            g.InvocationExpression(
                               g.IdentifierName(asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod]),
                               g.IdentifierName("proxy"),
                               g.IdentifierName("alwaysAbort")
                            )
                         )
                      },
                      new SyntaxNode[]
                      {
                         g.AssignmentStatement(
                            g.MemberAccessExpression(
                               g.ThisExpression(),
                               nameTable[MemberNames.CachedProxyField]
                            ),
                            g.NullLiteralExpression()
                         )
                      }
                   )
                }
             )
          }
       );
 }

      private SyntaxNode CreateStaticCloseProxyMethod(Compilation compilation, SyntaxGenerator g, GenerationNameTable nameTable, bool asAsync)
      {
         //private static void CloseProxy(System.ServiceModel.ICommunicationObject proxy, bool alwaysAbort)
         //{
         //   try
         //   {
         //      if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
         //      {
         //         if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
         //         {
         //            proxy.Close();
         //         }
         //         else
         //         {
         //            proxy.Abort();
         //         }
         //      }
         //   }
         //   catch (System.ServiceModel.CommunicationException)
         //   {
         //      proxy.Abort();
         //   }
         //   catch (System.TimeoutException)
         //   {
         //      proxy.Abort();
         //   }
         //   catch
         //   {
         //      proxy.Abort();
         //      throw;
         //   }
         //}                  
         
         return g.MethodDeclaration(
            asAsync ? nameTable[MemberNames.CloseProxyAsyncMethod] : nameTable[MemberNames.CloseProxyMethod],
            accessibility: Accessibility.Private,
            returnType: asAsync ? g.TypeExpression(compilation.RequireType<Task>()) : null,
            modifiers: (asAsync ? DeclarationModifiers.Async : DeclarationModifiers.None) | DeclarationModifiers.Static,
            parameters: new SyntaxNode[]
            {
               g.ParameterDeclaration("proxy", g.TypeExpression(compilation.RequireTypeByMetadataName("System.ServiceModel.ICommunicationObject"))),
               g.ParameterDeclaration("alwaysAbort", g.TypeExpression(SpecialType.System_Boolean))

            },
            statements: new SyntaxNode[]
            {
               g.TryCatchStatement(
                  new SyntaxNode[]
                  {
                     // if (proxy != null && proxy.State != System.ServiceModel.CommunicationState.Closed)
                     g.IfStatement(
                        g.LogicalAndExpression(
                           g.ReferenceNotEqualsExpression(
                              g.IdentifierName("proxy"),
                              g.NullLiteralExpression()
                           ),
                           g.ValueNotEqualsExpression(
                              g.MemberAccessExpression(
                                 g.IdentifierName("proxy"),
                                 "State"
                              ),
                              g.DottedName("System.ServiceModel.CommunicationState.Closed")
                           )
                        ),
                        new SyntaxNode[]
                        {
                           // if (!alwaysAbort && proxy.State != System.ServiceModel.CommunicationState.Faulted)
                           g.IfStatement(
                              g.LogicalAndExpression(
                                 g.LogicalNotExpression(
                                    g.IdentifierName("alwaysAbort")
                                 ),
                                 g.ValueNotEqualsExpression(
                                    g.MemberAccessExpression(
                                       g.IdentifierName("proxy"),
                                       "State"
                                    ),
                                    g.DottedName("System.ServiceModel.CommunicationState.Faulted")
                                 )
                              ),
                              new SyntaxNode[]
                              {
                                 g.ExpressionStatement(
                                 asAsync ? 
                                 // await System.Threading.Tasks.Task.Factory.FromAsync(proxy.BeginClose, proxy.EndClose, null).ConfigureAwait(false);
                                 AwaitExpression(g,
                                    g.InvocationExpression(
                                       g.DottedName("System.Threading.Tasks.Task.Factory.FromAsync"),
                                       g.DottedName("proxy.BeginClose"),
                                       g.DottedName("proxy.EndClose"),
                                       g.NullLiteralExpression()
                                    )
                                 )
                                 :
                                 // proxy.Close();
                                 g.InvocationExpression(
                                       g.MemberAccessExpression(
                                          g.IdentifierName("proxy"),
                                          "Close"
                                       )
//.........这里部分代码省略.........

      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.........