Use is null.

JohanLarsson · JohanLarsson · commit 7f61b896039d · 2020-01-31T08:39:04.000+01:00
Consistency.
diff --git a/IDisposableAnalyzers.Benchmarks/Program.cs b/IDisposableAnalyzers.Benchmarks/Program.cs
@@ -69,7 +69,7 @@ private static IEnumerable<Summary> RunSingle<T>()
         private static void CopyResult(Summary summary)
         {
             var name = summary.Title.Split('.').LastOrDefault()?.Split('-').FirstOrDefault();
-            if (name == null)
+            if (name is null)
             {
                 Console.WriteLine("Did not find name in: " + summary.Title);
                 Console.WriteLine("Press any key to exit.");
@@ -80,7 +80,7 @@ private static void CopyResult(Summary summary)
             var pattern = $"{summary.Title.Split('-').First()}-report-github.md";
             var sourceFileName = Directory.EnumerateFiles(summary.ResultsDirectoryPath, pattern)
                                           .SingleOrDefault();
-            if (sourceFileName == null)
+            if (sourceFileName is null)
             {
                 Console.WriteLine("Did not find a file matching the pattern: " + pattern);
                 Console.WriteLine("Press any key to exit.");
diff --git a/IDisposableAnalyzers.Test/IDisposableAnalyzers.Test.csproj b/IDisposableAnalyzers.Test/IDisposableAnalyzers.Test.csproj
@@ -1,7 +1,7 @@
 ﻿<?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net472</TargetFramework>
+    <TargetFramework>net48</TargetFramework>
     <LangVersion>latest</LangVersion>
     <CodeAnalysisRuleSet>IDisposableAnalyzers.Test.ruleset</CodeAnalysisRuleSet>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
diff --git a/IDisposableAnalyzers/Analyzers/DisposeCallAnalyzer.cs b/IDisposableAnalyzers/Analyzers/DisposeCallAnalyzer.cs
@@ -38,8 +38,7 @@ context.Node is InvocationExpressionSyntax invocation &&
                     context.ReportDiagnostic(Diagnostic.Create(Descriptors.IDISP007DoNotDisposeInjected, invocation.FirstAncestorOrSelf<StatementSyntax>()?.GetLocation() ?? invocation.GetLocation()));
                 }
 
-                if (invocation.Expression is MemberAccessExpressionSyntax memberAccess &&
-                    memberAccess.Expression is IdentifierNameSyntax &&
+                if (invocation.Expression is MemberAccessExpressionSyntax { Expression: IdentifierNameSyntax _ } &&
                     context.SemanticModel.TryGetSymbol(root, context.CancellationToken, out ILocalSymbol? local))
                 {
                     if (IsUsedAfter(local, invocation, context, out var locations))
@@ -71,7 +70,7 @@ private static bool IsUsedAfter(ILocalSymbol local, InvocationExpressionSyntax i
                         !IsAssigned(identifierName) &&
                         !IsReassigned(identifierName))
                     {
-                        if (temp == null)
+                        if (temp is null)
                         {
                             temp = new List<Location>();
                         }
diff --git a/IDisposableAnalyzers/Analyzers/ReturnValueAnalyzer.cs b/IDisposableAnalyzers/Analyzers/ReturnValueAnalyzer.cs
@@ -178,7 +178,7 @@ private static bool IsLazyEnumerable(InvocationExpressionSyntax invocation, Recu
 
         private static bool IsDisposableReturnTypeOrIgnored(ITypeSymbol? type, Compilation compilation)
         {
-            if (type == null ||
+            if (type is null ||
                 type == KnownSymbol.Void)
             {
                 return true;
diff --git a/IDisposableAnalyzers/CodeFixes/Helpers/MethodFactory.cs b/IDisposableAnalyzers/CodeFixes/Helpers/MethodFactory.cs
@@ -100,7 +100,7 @@ internal static class MethodFactory
 
         internal static MethodDeclarationSyntax Dispose(ExpressionSyntax disposedField)
         {
-            if (disposedField == null)
+            if (disposedField is null)
             {
                 return EmptyDispose;
             }
@@ -118,7 +118,7 @@ internal static MethodDeclarationSyntax Dispose(ExpressionSyntax disposedField)
 
         internal static MethodDeclarationSyntax VirtualDispose(ExpressionSyntax disposedField)
         {
-            if (disposedField == null)
+            if (disposedField is null)
             {
                 return DefaultVirtualDispose;
             }
@@ -221,7 +221,7 @@ static ExpressionStatementSyntax BaseDispose(IParameterSymbol parameter)
 
         internal static MethodDeclarationSyntax ProtectedVirtualDispose(ExpressionSyntax disposedField)
         {
-            if (disposedField == null)
+            if (disposedField is null)
             {
                 return DefaultProtectedVirtualDispose;
             }
diff --git a/IDisposableAnalyzers/Helpers/Disposable.IsCreation.cs b/IDisposableAnalyzers/Helpers/Disposable.IsCreation.cs
@@ -144,7 +144,7 @@ internal static Result IsAssignedWithCreated(ISymbol symbol, ExpressionSyntax lo
         /// </summary>
         internal static Result IsCreation(ExpressionSyntax candidate, SemanticModel semanticModel, CancellationToken cancellationToken)
         {
-            if (candidate == null)
+            if (candidate is null)
             {
                 return Result.Unknown;
             }
@@ -229,7 +229,7 @@ internal static Result IsAnyCreation(RecursiveValues values, SemanticModel seman
         /// </summary>
         private static Result IsCreationCore(ExpressionSyntax candidate, SemanticModel semanticModel, CancellationToken cancellationToken)
         {
-            if (candidate == null ||
+            if (candidate is null ||
                 candidate.IsMissing)
             {
                 return Result.Unknown;
@@ -277,7 +277,7 @@ candidate is ImplicitArrayCreationExpressionSyntax ||
 
         private static Result IsCreationCore(ISymbol candidate, Compilation compilation)
         {
-            if (candidate == null)
+            if (candidate is null)
             {
                 return Result.Unknown;
             }
diff --git a/IDisposableAnalyzers/Helpers/Disposable.IsInjected.cs b/IDisposableAnalyzers/Helpers/Disposable.IsInjected.cs
@@ -99,7 +99,7 @@ internal static bool IsAssignedWithInjected(ISymbol symbol, ExpressionSyntax loc
 
         private static Result IsInjectedCore(ISymbol symbol)
         {
-            if (symbol == null)
+            if (symbol is null)
             {
                 return Result.Unknown;
             }
@@ -143,7 +143,7 @@ private static Result IsInjectedCore(ISymbol symbol)
                 }
 
                 if (property.IsReadOnly ||
-                    property.SetMethod == null)
+                    property.SetMethod is null)
                 {
                     return Result.No;
                 }
diff --git a/IDisposableAnalyzers/Helpers/Disposable.cs b/IDisposableAnalyzers/Helpers/Disposable.cs
@@ -25,7 +25,7 @@ internal static bool IsPotentiallyAssignableFrom(ExpressionSyntax candidate, Sem
 
         internal static bool IsPotentiallyAssignableFrom(ITypeSymbol type, Compilation compilation)
         {
-            if (type == null ||
+            if (type is null ||
                 type is IErrorTypeSymbol)
             {
                 return false;
@@ -48,7 +48,7 @@ internal static bool IsPotentiallyAssignableFrom(ITypeSymbol type, Compilation c
 
         internal static bool IsAssignableFrom(ITypeSymbol type, Compilation compilation)
         {
-            if (type == null)
+            if (type is null)
             {
                 return false;
             }
diff --git a/IDisposableAnalyzers/Helpers/DisposableMember.cs b/IDisposableAnalyzers/Helpers/DisposableMember.cs
@@ -13,7 +13,7 @@ internal static Result IsDisposed(FieldOrPropertyAndDeclaration member, Semantic
 
         internal static Result IsDisposed(FieldOrProperty member, INamedTypeSymbol context, SemanticModel semanticModel, CancellationToken cancellationToken)
         {
-            if (context == null)
+            if (context is null)
             {
                 return Result.Unknown;
             }
@@ -38,7 +38,7 @@ internal static Result IsDisposed(FieldOrProperty member, INamedTypeSymbol conte
 
         internal static bool IsDisposed(FieldOrProperty member, IMethodSymbol disposeMethod, SemanticModel semanticModel, CancellationToken cancellationToken)
         {
-            if (disposeMethod == null)
+            if (disposeMethod is null)
             {
                 return false;
             }
diff --git a/IDisposableAnalyzers/Helpers/Pooled/RecursiveValues.cs b/IDisposableAnalyzers/Helpers/Pooled/RecursiveValues.cs
@@ -82,7 +82,7 @@ internal static RecursiveValues Borrow(IReadOnlyList<ExpressionSyntax> rawValues
 
         private bool AddRecursiveValues(ExpressionSyntax assignedValue)
         {
-            if (assignedValue == null ||
+            if (assignedValue is null ||
                 assignedValue.IsMissing ||
                 !this.checkedLocations.Add(assignedValue))
             {
diff --git a/IDisposableAnalyzers/Helpers/TestFixture.cs b/IDisposableAnalyzers/Helpers/TestFixture.cs
@@ -67,7 +67,7 @@ internal static bool TryGetTearDownMethod(AttributeSyntax setupAttribute, Semant
         {
             result = null;
             var typeDeclarationSyntax = setupAttribute.FirstAncestor<TypeDeclarationSyntax>();
-            if (typeDeclarationSyntax == null)
+            if (typeDeclarationSyntax is null)
             {
                 return false;
             }
diff --git a/IDisposableAnalyzers/Helpers/Walkers/AssignedValueWalker.cs b/IDisposableAnalyzers/Helpers/Walkers/AssignedValueWalker.cs
@@ -65,7 +65,7 @@ public override void VisitVariableDeclarator(VariableDeclaratorSyntax node)
 
         public override void VisitConstructorDeclaration(ConstructorDeclarationSyntax node)
         {
-            if (node.Initializer == null &&
+            if (node.Initializer is null &&
                 this.semanticModel.TryGetSymbol(node, this.cancellationToken, out var ctor) &&
                 ctor.ContainingType is { BaseType: { } baseType } &&
                 Constructor.TryFindDefault(baseType, Search.Recursive, out var baseCtor))
@@ -400,7 +400,7 @@ protected override void Clear()
 
         private static AssignedValueWalker BorrowCore(ISymbol symbol, SyntaxNode context, SemanticModel semanticModel, CancellationToken cancellationToken)
         {
-            if (symbol == null || context == null)
+            if (symbol is null || context is null)
             {
                 return Borrow(() => new AssignedValueWalker());
             }
@@ -417,7 +417,7 @@ private static AssignedValueWalker BorrowCore(ISymbol symbol, SyntaxNode context
 
         private void Run()
         {
-            if (this.CurrentSymbol == null)
+            if (this.CurrentSymbol is null)
             {
                 return;
             }
@@ -540,7 +540,7 @@ this.context.Node is ExpressionSyntax expression &&
 
         private void HandleAssignedValue(SyntaxNode assigned, ExpressionSyntax value)
         {
-            if (value == null)
+            if (value is null)
             {
                 return;
             }
@@ -572,7 +572,7 @@ declarationPattern.Designation is SingleVariableDesignationSyntax singleVariable
                 {
                     case ArrayCreationExpressionSyntax arrayCreation:
                         {
-                            if (arrayCreation.Initializer == null)
+                            if (arrayCreation.Initializer is null)
                             {
                                 return;
                             }
@@ -587,7 +587,7 @@ declarationPattern.Designation is SingleVariableDesignationSyntax singleVariable
 
                     case ObjectCreationExpressionSyntax objectCreation:
                         {
-                            if (objectCreation.Initializer == null)
+                            if (objectCreation.Initializer is null)
                             {
                                 return;
                             }
@@ -740,7 +740,7 @@ internal bool ShouldVisit(SyntaxNode node)
 
             private static StatementSyntax? GetStopAt(SyntaxNode? location, ISymbol symbol, CancellationToken cancellationToken)
             {
-                if (location == null)
+                if (location is null)
                 {
                     return null;
                 }
diff --git a/IDisposableAnalyzers/Helpers/Walkers/ConstructorsWalker.cs b/IDisposableAnalyzers/Helpers/Walkers/ConstructorsWalker.cs
@@ -112,14 +112,14 @@ internal static ConstructorsWalker Borrow(TypeDeclarationSyntax context, Semanti
                 }
 
                 if (context is ClassDeclarationSyntax classDeclaration &&
-                    classDeclaration.BaseList == null)
+                    classDeclaration.BaseList is null)
                 {
                     return walker;
                 }
             }
 
             if (walker.nonPrivateCtors.Count == 0 &&
-                walker.Default == null)
+                walker.Default is null)
             {
                 if (Constructor.TryFindDefault(walker.Type, Search.Recursive, out var defaultCtor) &&
                     defaultCtor.TrySingleDeclaration(cancellationToken, out ConstructorDeclarationSyntax? defaultCtorDeclaration))
diff --git a/IDisposableAnalyzers/Helpers/Walkers/ReturnValueWalker.cs b/IDisposableAnalyzers/Helpers/Walkers/ReturnValueWalker.cs
@@ -33,7 +33,7 @@ private ReturnValueWalker()
 
         public override void Visit(SyntaxNode node)
         {
-            if (node == null)
+            if (node is null)
             {
                 return;
             }
@@ -64,7 +64,7 @@ public override void VisitArrowExpressionClause(ArrowExpressionClauseSyntax node
         internal static ReturnValueWalker Borrow(SyntaxNode node, ReturnValueSearch search, SemanticModel semanticModel, CancellationToken cancellationToken)
         {
             var walker = Borrow(() => new ReturnValueWalker());
-            if (node == null)
+            if (node is null)
             {
                 return walker;
             }
@@ -304,7 +304,7 @@ symbol is IMethodSymbol method &&
 
         private bool TryHandleLambda(LambdaExpressionSyntax lambda)
         {
-            if (lambda == null)
+            if (lambda is null)
             {
                 return false;
             }
diff --git a/IDisposableAnalyzers/IDisposableAnalyzers.csproj b/IDisposableAnalyzers/IDisposableAnalyzers.csproj
@@ -14,11 +14,6 @@
     <AssemblyOriginatorKeyFile>..\IDisposableAnalyzers.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
 
-  <PropertyGroup>
-    <AnnotatedReferenceAssemblyVersion>3.0.0</AnnotatedReferenceAssemblyVersion>
-    <GenerateNullableAttributes>true</GenerateNullableAttributes>
-  </PropertyGroup>
-
   <PropertyGroup>
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
     <SuppressDependenciesWhenPacking>true</SuppressDependenciesWhenPacking>
@@ -46,8 +41,11 @@ FEATURE Handle some Winforms specific use cases.</Description>
     <PackageReference Include="Gu.Roslyn.Extensions" Version="0.12.5-dev" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="3.3.1" />
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.8" PrivateAssets="all" />
-    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[$(AnnotatedReferenceAssemblyVersion)]" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.113" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[3.1.0]" />
     <PackageReference Include="TunnelVisionLabs.ReferenceAssemblyAnnotator" Version="1.0.0-alpha.154" PrivateAssets="all" />
   </ItemGroup>
 

Original file line number	Diff line number	Diff line change
`@@ -69,7 +69,7 @@ private static IEnumerable<Summary> RunSingle<T>()`
`69`	`69`	`private static void CopyResult(Summary summary)`
`70`	`70`	`{`
`71`	`71`	`var name = summary.Title.Split('.').LastOrDefault()?.Split('-').FirstOrDefault();`
`72`		`- if (name == null)`
	`72`	`+ if (name is null)`
`73`	`73`	`{`
`74`	`74`	`Console.WriteLine("Did not find name in: " + summary.Title);`
`75`	`75`	`Console.WriteLine("Press any key to exit.");`
`@@ -80,7 +80,7 @@ private static void CopyResult(Summary summary)`
`80`	`80`	`var pattern = $"{summary.Title.Split('-').First()}-report-github.md";`
`81`	`81`	`var sourceFileName = Directory.EnumerateFiles(summary.ResultsDirectoryPath, pattern)`
`82`	`82`	`.SingleOrDefault();`
`83`		`- if (sourceFileName == null)`
	`83`	`+ if (sourceFileName is null)`
`84`	`84`	`{`
`85`	`85`	`Console.WriteLine("Did not find a file matching the pattern: " + pattern);`
`86`	`86`	`Console.WriteLine("Press any key to exit.");`
Original file line number	Diff line number	Diff line change
`@@ -38,8 +38,7 @@ context.Node is InvocationExpressionSyntax invocation &&`
`38`	`38`	`context.ReportDiagnostic(Diagnostic.Create(Descriptors.IDISP007DoNotDisposeInjected, invocation.FirstAncestorOrSelf<StatementSyntax>()?.GetLocation() ?? invocation.GetLocation()));`
`39`	`39`	`}`
`40`	`40`
`41`		`- if (invocation.Expression is MemberAccessExpressionSyntax memberAccess &&`
`42`		`- memberAccess.Expression is IdentifierNameSyntax &&`
	`41`	`+ if (invocation.Expression is MemberAccessExpressionSyntax { Expression: IdentifierNameSyntax _ } &&`
`43`	`42`	`context.SemanticModel.TryGetSymbol(root, context.CancellationToken, out ILocalSymbol? local))`
`44`	`43`	`{`
`45`	`44`	`if (IsUsedAfter(local, invocation, context, out var locations))`
`@@ -71,7 +70,7 @@ private static bool IsUsedAfter(ILocalSymbol local, InvocationExpressionSyntax i`
`71`	`70`	`!IsAssigned(identifierName) &&`
`72`	`71`	`!IsReassigned(identifierName))`
`73`	`72`	`{`
`74`		`- if (temp == null)`
	`73`	`+ if (temp is null)`
`75`	`74`	`{`
`76`	`75`	`temp = new List<Location>();`
`77`	`76`	`}`
Original file line number	Diff line number	Diff line change
`@@ -178,7 +178,7 @@ private static bool IsLazyEnumerable(InvocationExpressionSyntax invocation, Recu`
`178`	`178`
`179`	`179`	`private static bool IsDisposableReturnTypeOrIgnored(ITypeSymbol? type, Compilation compilation)`
`180`	`180`	`{`
`181`		`- if (type == null \|\|`
	`181`	`+ if (type is null \|\|`
`182`	`182`	`type == KnownSymbol.Void)`
`183`	`183`	`{`
`184`	`184`	`return true;`
Original file line number	Diff line number	Diff line change
`@@ -100,7 +100,7 @@ internal static class MethodFactory`
`100`	`100`
`101`	`101`	`internal static MethodDeclarationSyntax Dispose(ExpressionSyntax disposedField)`
`102`	`102`	`{`
`103`		`- if (disposedField == null)`
	`103`	`+ if (disposedField is null)`
`104`	`104`	`{`
`105`	`105`	`return EmptyDispose;`
`106`	`106`	`}`
`@@ -118,7 +118,7 @@ internal static MethodDeclarationSyntax Dispose(ExpressionSyntax disposedField)`
`118`	`118`
`119`	`119`	`internal static MethodDeclarationSyntax VirtualDispose(ExpressionSyntax disposedField)`
`120`	`120`	`{`
`121`		`- if (disposedField == null)`
	`121`	`+ if (disposedField is null)`
`122`	`122`	`{`
`123`	`123`	`return DefaultVirtualDispose;`
`124`	`124`	`}`
`@@ -221,7 +221,7 @@ static ExpressionStatementSyntax BaseDispose(IParameterSymbol parameter)`
`221`	`221`
`222`	`222`	`internal static MethodDeclarationSyntax ProtectedVirtualDispose(ExpressionSyntax disposedField)`
`223`	`223`	`{`
`224`		`- if (disposedField == null)`
	`224`	`+ if (disposedField is null)`
`225`	`225`	`{`
`226`	`226`	`return DefaultProtectedVirtualDispose;`
`227`	`227`	`}`
Original file line number	Diff line number	Diff line change
`@@ -144,7 +144,7 @@ internal static Result IsAssignedWithCreated(ISymbol symbol, ExpressionSyntax lo`
`144`	`144`	`/// </summary>`
`145`	`145`	`internal static Result IsCreation(ExpressionSyntax candidate, SemanticModel semanticModel, CancellationToken cancellationToken)`
`146`	`146`	`{`
`147`		`- if (candidate == null)`
	`147`	`+ if (candidate is null)`
`148`	`148`	`{`
`149`	`149`	`return Result.Unknown;`
`150`	`150`	`}`
`@@ -229,7 +229,7 @@ internal static Result IsAnyCreation(RecursiveValues values, SemanticModel seman`
`229`	`229`	`/// </summary>`
`230`	`230`	`private static Result IsCreationCore(ExpressionSyntax candidate, SemanticModel semanticModel, CancellationToken cancellationToken)`
`231`	`231`	`{`
`232`		`- if (candidate == null \|\|`
	`232`	`+ if (candidate is null \|\|`
`233`	`233`	`candidate.IsMissing)`
`234`	`234`	`{`
`235`	`235`	`return Result.Unknown;`
`@@ -277,7 +277,7 @@ candidate is ImplicitArrayCreationExpressionSyntax \|\|`
`277`	`277`
`278`	`278`	`private static Result IsCreationCore(ISymbol candidate, Compilation compilation)`
`279`	`279`	`{`
`280`		`- if (candidate == null)`
	`280`	`+ if (candidate is null)`
`281`	`281`	`{`
`282`	`282`	`return Result.Unknown;`
`283`	`283`	`}`
Original file line number	Diff line number	Diff line change
`@@ -99,7 +99,7 @@ internal static bool IsAssignedWithInjected(ISymbol symbol, ExpressionSyntax loc`
`99`	`99`
`100`	`100`	`private static Result IsInjectedCore(ISymbol symbol)`
`101`	`101`	`{`
`102`		`- if (symbol == null)`
	`102`	`+ if (symbol is null)`
`103`	`103`	`{`
`104`	`104`	`return Result.Unknown;`
`105`	`105`	`}`
`@@ -143,7 +143,7 @@ private static Result IsInjectedCore(ISymbol symbol)`
`143`	`143`	`}`
`144`	`144`
`145`	`145`	`if (property.IsReadOnly \|\|`
`146`		`- property.SetMethod == null)`
	`146`	`+ property.SetMethod is null)`
`147`	`147`	`{`
`148`	`148`	`return Result.No;`
`149`	`149`	`}`
Original file line number	Diff line number	Diff line change
`@@ -25,7 +25,7 @@ internal static bool IsPotentiallyAssignableFrom(ExpressionSyntax candidate, Sem`
`25`	`25`
`26`	`26`	`internal static bool IsPotentiallyAssignableFrom(ITypeSymbol type, Compilation compilation)`
`27`	`27`	`{`
`28`		`- if (type == null \|\|`
	`28`	`+ if (type is null \|\|`
`29`	`29`	`type is IErrorTypeSymbol)`
`30`	`30`	`{`
`31`	`31`	`return false;`
`@@ -48,7 +48,7 @@ internal static bool IsPotentiallyAssignableFrom(ITypeSymbol type, Compilation c`
`48`	`48`
`49`	`49`	`internal static bool IsAssignableFrom(ITypeSymbol type, Compilation compilation)`
`50`	`50`	`{`
`51`		`- if (type == null)`
	`51`	`+ if (type is null)`
`52`	`52`	`{`
`53`	`53`	`return false;`
`54`	`54`	`}`
Original file line number	Diff line number	Diff line change
`@@ -13,7 +13,7 @@ internal static Result IsDisposed(FieldOrPropertyAndDeclaration member, Semantic`
`13`	`13`
`14`	`14`	`internal static Result IsDisposed(FieldOrProperty member, INamedTypeSymbol context, SemanticModel semanticModel, CancellationToken cancellationToken)`
`15`	`15`	`{`
`16`		`- if (context == null)`
	`16`	`+ if (context is null)`
`17`	`17`	`{`
`18`	`18`	`return Result.Unknown;`
`19`	`19`	`}`
`@@ -38,7 +38,7 @@ internal static Result IsDisposed(FieldOrProperty member, INamedTypeSymbol conte`
`38`	`38`
`39`	`39`	`internal static bool IsDisposed(FieldOrProperty member, IMethodSymbol disposeMethod, SemanticModel semanticModel, CancellationToken cancellationToken)`
`40`	`40`	`{`
`41`		`- if (disposeMethod == null)`
	`41`	`+ if (disposeMethod is null)`
`42`	`42`	`{`
`43`	`43`	`return false;`
`44`	`44`	`}`
Original file line number	Diff line number	Diff line change
`@@ -82,7 +82,7 @@ internal static RecursiveValues Borrow(IReadOnlyList<ExpressionSyntax> rawValues`
`82`	`82`
`83`	`83`	`private bool AddRecursiveValues(ExpressionSyntax assignedValue)`
`84`	`84`	`{`
`85`		`- if (assignedValue == null \|\|`
	`85`	`+ if (assignedValue is null \|\|`
`86`	`86`	`assignedValue.IsMissing \|\|`
`87`	`87`	`!this.checkedLocations.Add(assignedValue))`
`88`	`88`	`{`