Allow inheritdoc for constructors with base types

Author: MartyIX

StyleCop.Analyzers/StyleCop.Analyzers.Test/DocumentationRules/SA1648UnitTests.cs

@@ -1,7 +1,7 @@
 // Copyright (c) Tunnel Vision Laboratories, LLC. All Rights Reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
+#nullable enable
 
 namespace StyleCop.Analyzers.Test.DocumentationRules
 {
@@ -18,6 +18,23 @@ namespace StyleCop.Analyzers.Test.DocumentationRules
     /// </summary>
     public class SA1648UnitTests
     {
+        [Fact]
+        public async Task TestConstructorInheritsFromParentAsync()
+        {
+            var testCode = @"class Base
+{
+    public Base() { }
+}
+
+class Test : Base
+{
+    /// <inheritdoc />
+    public Test() { }
+}";
+
+            await VerifyCSharpDiagnosticAsync(testCode, DiagnosticResult.EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
+        }
+
         [Fact]
         public async Task TestClassOverridesClassAsync()
         {

StyleCop.Analyzers/StyleCop.Analyzers/DocumentationRules/SA1648InheritDocMustBeUsedWithInheritingClass.cs

@@ -159,6 +159,11 @@ private static void HandleMemberDeclaration(SyntaxNodeAnalysisContext context)
                 }
             }
 
+            if (memberSyntax is ConstructorDeclarationSyntax && declaredSymbol is IMethodSymbol methodSymbol && methodSymbol.ContainingType?.BaseType != null)
+            {
+                return;
+            }
+
             if (documentation.Content.GetFirstXmlElement(XmlCommentHelper.IncludeXmlTag) is XmlEmptyElementSyntax includeElement)
             {
                 if (declaredSymbol == null)