Fix RCS1213 (#1343)

Author: josefpihrt

ChangeLog.md

@@ -27,6 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fix analyzer [RCS1262](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1262) ([PR](https://github.com/dotnet/roslynator/pull/1339))
+- Fix analyzer [RCS1213](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1213) ([PR](https://github.com/dotnet/roslynator/pull/1343))
 
 ## [4.7.0] - 2023-12-03
 

src/Analyzers/CSharp/Analysis/UnusedMember/UnusedMemberWalker.cs

@@ -202,7 +202,8 @@ public override void VisitTypeParameterList(TypeParameterListSyntax node)
 
     public override void VisitBaseList(BaseListSyntax node)
     {
-        Debug.Fail($"{nameof(UnusedMemberWalker)}.{nameof(VisitBaseList)}");
+        if (node is not null)
+            base.VisitBaseList(node);
     }
 
     public override void VisitTypeParameterConstraintClause(TypeParameterConstraintClauseSyntax node)
@@ -230,26 +231,30 @@ public override void VisitClassDeclaration(ClassDeclarationSyntax node)
     {
         VisitAttributeLists(node.AttributeLists);
         VisitParameterList(node.ParameterList);
+        VisitBaseList(node.BaseList);
         VisitMembers(node.Members);
     }
 
     public override void VisitInterfaceDeclaration(InterfaceDeclarationSyntax node)
     {
         VisitAttributeLists(node.AttributeLists);
         VisitParameterList(node.ParameterList);
+        VisitBaseList(node.BaseList);
         VisitMembers(node.Members);
     }
 
     public override void VisitStructDeclaration(StructDeclarationSyntax node)
     {
         VisitAttributeLists(node.AttributeLists);
         VisitParameterList(node.ParameterList);
+        VisitBaseList(node.BaseList);
         VisitMembers(node.Members);
     }
 
     public override void VisitRecordDeclaration(RecordDeclarationSyntax node)
     {
         VisitAttributeLists(node.AttributeLists);
+        VisitBaseList(node.BaseList);
         VisitMembers(node.Members);
     }
 

src/Tests/Analyzers.Tests/RCS1213RemoveUnusedMemberDeclarationTests.cs

@@ -408,4 +408,23 @@ public MyAttribute(string s)
 }
 ", options: Options.AddAllowedCompilerDiagnosticId("CS9113"));
     }
+
+    [Fact, Trait(Traits.Analyzer, DiagnosticIdentifiers.RemoveUnusedMemberDeclaration)]
+    public async Task TestNoDiagnostic_BaseList()
+    {
+        await VerifyNoDiagnosticAsync(@"
+using System;
+
+internal abstract class B(Action action)
+{
+    public Action Action { get; } = action;
+}
+
+internal sealed class C() : B(Do)
+{
+    private static void Do()
+    {
+    }
+}");
+    }
 }