From 9ee67d8bb7d389a5b6181ea82e16b545cf27a4d0 Mon Sep 17 00:00:00 2001
From: Stefan Jaud <59165496+pjanck@users.noreply.github.com>
Date: Tue, 14 Jul 2026 11:45:10 +0200
Subject: [PATCH] Add check for abstract classes in analyzer rule

Skip attribute check for abstract classes in RequireSfgGeneratorAttributeRule.

Fixes #70
---
 .../Analyzer/Rules/RequireSfgGeneratorAttributeRule.cs     | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/SourceGenerator.Foundations/Analyzer/Rules/RequireSfgGeneratorAttributeRule.cs b/src/SourceGenerator.Foundations/Analyzer/Rules/RequireSfgGeneratorAttributeRule.cs
index d4d7544..7bf32e9 100644
--- a/src/SourceGenerator.Foundations/Analyzer/Rules/RequireSfgGeneratorAttributeRule.cs
+++ b/src/SourceGenerator.Foundations/Analyzer/Rules/RequireSfgGeneratorAttributeRule.cs
@@ -12,6 +12,13 @@ public RequireSfgGeneratorAttributeRule() : base(CreateDescriptor())
 
         protected override void Analyze(ClassDeclarationSyntax classDeclaration)
         {
+            if(classDeclaration.Modifiers.Any(m => m.IsKind(Microsoft.CodeAnalysis.CSharp.SyntaxKind.AbstractKeyword)))
+            {
+                // Abstract classes do not need the attribute, so we can skip this check
+                // Fix: https://github.com/ByronMayne/SourceGenerator.Foundations/issues/70
+                return;
+            }
+            
 #pragma warning disable CS0618 // Type or member is obsolete
             if ( !HasAttribute(classDeclaration, nameof(IncrementalGeneratorAttribute)) &&
                 !HasAttribute(classDeclaration, nameof(SgfGeneratorAttribute)))