Feature/dependency registration improvements

CLAUDE.md

@@ -102,6 +102,7 @@ Both generators follow the **Incremental Generator** pattern (IIncrementalGenera
 
 **Key Features:**
 - Auto-detects all implemented interfaces (excluding System.* and Microsoft.* namespaces)
+- **Abstract base class support** - Register services against abstract base classes (e.g., `AuthenticationStateProvider`, `DelegatingHandler`)
 - **Generic interface registration** - Full support for open generic types like `IRepository<T>` and `IHandler<TRequest, TResponse>`
 - **Keyed service registration** - Multiple implementations of the same interface with different keys (.NET 8+)
 - **Factory method registration** - Custom initialization logic via static factory methods
@@ -123,6 +124,10 @@ Both generators follow the **Incremental Generator** pattern (IIncrementalGenera
 // Input: [Registration] public class UserService : IUserService { }
 // Output: services.AddSingleton<IUserService, UserService>();
 
+// Abstract Base Class Input: [Registration(Lifetime.Scoped, As = typeof(AuthenticationStateProvider))]
+//                             public class ServerAuthenticationStateProvider : AuthenticationStateProvider { }
+// Abstract Base Class Output: services.AddScoped<AuthenticationStateProvider, ServerAuthenticationStateProvider>();
+
 // Generic Input: [Registration(Lifetime.Scoped)] public class Repository<T> : IRepository<T> where T : class { }
 // Generic Output: services.AddScoped(typeof(IRepository<>), typeof(Repository<>));
 
@@ -277,8 +282,8 @@ services.AddDependencyRegistrationsFromDomain(
 - Runtime (method parameters): Flexible per application, allows different apps to exclude different services
 
 **Diagnostics:**
-- `ATCDIR001` - Service 'As' type must be an interface (Error)
-- `ATCDIR002` - Class does not implement specified interface (Error)
+- `ATCDIR001` - Service 'As' type must be an interface or abstract class (Error)
+- `ATCDIR002` - Class does not implement specified interface or inherit from abstract class (Error)
 - `ATCDIR003` - Duplicate registration with different lifetimes (Warning)
 - `ATCDIR004` - Hosted services must use Singleton lifetime (Error)
 - `ATCDIR005` - Factory method not found (Error)

Directory.Build.props

@@ -42,7 +42,7 @@
     <PackageReference Include="Atc.Analyzer" Version="0.1.11" PrivateAssets="All" />
     <PackageReference Include="AsyncFixer" Version="1.6.0" PrivateAssets="All" />
     <PackageReference Include="Asyncify" Version="0.9.7" PrivateAssets="All" />
-    <PackageReference Include="Meziantou.Analyzer" Version="2.0.253" PrivateAssets="All" />
+    <PackageReference Include="Meziantou.Analyzer" Version="2.0.254" PrivateAssets="All" />
     <PackageReference Include="SecurityCodeScan.VS2019" Version="5.6.7" PrivateAssets="All" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.507" PrivateAssets="All" />
     <PackageReference Include="SonarAnalyzer.CSharp" Version="10.15.0.120848" PrivateAssets="All" />

README.md

@@ -248,8 +248,8 @@ Get errors at compile time, not runtime:
 
 | ID | Description |
 |----|-------------|
-| ATCDIR001 | `As` parameter must be an interface type |
-| ATCDIR002 | Class must implement the specified interface |
+| ATCDIR001 | `As` parameter must be an interface or abstract class type |
+| ATCDIR002 | Class must implement the specified interface or inherit from abstract class |
 | ATCDIR003 | Duplicate registration with different lifetimes |
 | ATCDIR004 | Hosted services must use Singleton lifetime |
 | ATCDIR005 | Factory method not found |

docs/DependencyRegistrationGenerators.md

@@ -71,8 +71,8 @@ services.AddScoped<IUserService, UserService>();
   - [⚙️ RegistrationAttribute Parameters](#️-registrationattribute-parameters)
     - [📝 Examples](#-examples)
   - [🛡️ Diagnostics](#️-diagnostics)
-    - [❌ ATCDIR001: As Type Must Be Interface](#-atcdir001-as-type-must-be-interface)
-    - [❌ ATCDIR002: Class Does Not Implement Interface](#-atcdir002-class-does-not-implement-interface)
+    - [❌ ATCDIR001: As Type Must Be Interface or Abstract Class](#-atcdir001-as-type-must-be-interface-or-abstract-class)
+    - [❌ ATCDIR002: Class Does Not Implement Interface or Inherit Abstract Class](#-atcdir002-class-does-not-implement-interface-or-inherit-abstract-class)
     - [⚠️ ATCDIR003: Duplicate Registration with Different Lifetime](#️-atcdir003-duplicate-registration-with-different-lifetime)
     - [❌ ATCDIR004: Hosted Services Must Use Singleton Lifetime](#-atcdir004-hosted-services-must-use-singleton-lifetime)
   - [🔷 Generic Interface Registration](#-generic-interface-registration)
@@ -1233,35 +1233,55 @@ var app = builder.Build();
 
 The generator provides compile-time diagnostics to catch common errors:
 
-### ❌ ATCDIR001: As Type Must Be Interface
+### ❌ ATCDIR001: As Type Must Be Interface or Abstract Class
 
 **Severity:** Error
 
-**Description:** The type specified in `As` parameter must be an interface.
+**Description:** The type specified in `As` parameter must be an interface or abstract class.
 
 ```csharp
-// ❌ Error: BaseService is a class, not an interface
+// ❌ Error: BaseService is a concrete class
+public class BaseService { }
+
 [Registration(As = typeof(BaseService))]
 public class UserService : BaseService { }
+
+// ✅ OK: Abstract base class
+public abstract class AbstractBaseService { }
+
+[Registration(As = typeof(AbstractBaseService))]
+public class UserService : AbstractBaseService { }
+
+// ✅ OK: Interface
+public interface IUserService { }
+
+[Registration(As = typeof(IUserService))]
+public class UserService : IUserService { }
 ```
 
-**Fix:** Use an interface type or remove the `As` parameter.
+**Fix:** Use an interface, abstract class, or remove the `As` parameter.
 
-### ❌ ATCDIR002: Class Does Not Implement Interface
+### ❌ ATCDIR002: Class Does Not Implement Interface or Inherit Abstract Class
 
 **Severity:** Error
 
-**Description:** Class does not implement the interface specified in `As` parameter.
+**Description:** Class does not implement the interface or inherit from the abstract class specified in `As` parameter.
 
 ```csharp
 public interface IUserService { }
 
 // ❌ Error: UserService doesn't implement IUserService
 [Registration(As = typeof(IUserService))]
 public class UserService { }
+
+public abstract class AuthenticationStateProvider { }
+
+// ❌ Error: UserService doesn't inherit from AuthenticationStateProvider
+[Registration(As = typeof(AuthenticationStateProvider))]
+public class UserService { }
 ```
 
-**Fix:** Implement the interface or remove the `As` parameter.
+**Fix:** Implement the interface, inherit from the abstract class, or remove the `As` parameter.
 
 ### ⚠️ ATCDIR003: Duplicate Registration with Different Lifetime
 

sample/Atc.SourceGenerators.Mapping/Atc.SourceGenerators.Mapping.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.0" />
-    <PackageReference Include="Scalar.AspNetCore" Version="2.10.3" />
+    <PackageReference Include="Scalar.AspNetCore" Version="2.11.0" />
   </ItemGroup>
 
   <ItemGroup>

sample/PetStore.Api/PetStore.Api.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.0" />
-    <PackageReference Include="Scalar.AspNetCore" Version="2.10.3" />
+    <PackageReference Include="Scalar.AspNetCore" Version="2.11.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Atc.SourceGenerators.Annotations/RegistrationAttribute.cs

@@ -22,7 +22,7 @@ public RegistrationAttribute(Lifetime lifetime = Lifetime.Singleton)
     public Lifetime Lifetime { get; }
 
     /// <summary>
-    /// Gets or sets the service type to register against (typically an interface).
+    /// Gets or sets the service type to register against (typically an interface or abstract class).
     /// If not specified, the service will be registered as its concrete type.
     /// </summary>
     public global::System.Type? As { get; set; }

src/Atc.SourceGenerators/AnalyzerReleases.Shipped.md

@@ -7,8 +7,8 @@
 
 Rule ID | Category | Severity | Notes
 --------|----------|----------|-------
-ATCDIR001 | DependencyInjection | Error | Service 'As' type must be an interface
-ATCDIR002 | DependencyInjection | Error | Class does not implement specified interface
+ATCDIR001 | DependencyInjection | Error | Service 'As' type must be an interface or abstract class
+ATCDIR002 | DependencyInjection | Error | Class does not implement specified interface or inherit from abstract class
 ATCDIR003 | DependencyInjection | Warning | Duplicate service registration with different lifetime
 ATCDIR004 | DependencyInjection | Error | Hosted services must use Singleton lifetime
 ATCDIR005 | DependencyInjection | Error | Factory method not found
@@ -30,6 +30,9 @@ ATCOPT010 | OptionsBinding | Error | PostConfigure callback method has invalid s
 ATCOPT011 | OptionsBinding | Error | ConfigureAll requires multiple named options
 ATCOPT012 | OptionsBinding | Error | ConfigureAll callback method not found
 ATCOPT013 | OptionsBinding | Error | ConfigureAll callback method has invalid signature
+ATCOPT014 | OptionsBinding | Error | ChildSections cannot be used with Name property
+ATCOPT015 | OptionsBinding | Error | ChildSections requires at least 2 items
+ATCOPT016 | OptionsBinding | Error | ChildSections items cannot be null or empty
 ATCMAP001 | ObjectMapping | Error | Mapping class must be partial
 ATCMAP002 | ObjectMapping | Error | Target type must be a class or struct
 ATCMAP003 | ObjectMapping | Error | MapProperty target property not found

src/Atc.SourceGenerators/AnalyzerReleases.Unshipped.md

@@ -2,6 +2,3 @@
 
 Rule ID | Category | Severity | Notes
 --------|----------|----------|-------
-ATCOPT014 | OptionsBinding | Error | ChildSections cannot be used with Name property
-ATCOPT015 | OptionsBinding | Error | ChildSections requires at least 2 items
-ATCOPT016 | OptionsBinding | Error | ChildSections items cannot be null or empty

src/Atc.SourceGenerators/Atc.SourceGenerators.csproj

@@ -31,7 +31,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" PrivateAssets="all" />
   </ItemGroup>
 

src/Atc.SourceGenerators/Constants.cs

@@ -0,0 +1,12 @@
+namespace Atc.SourceGenerators;
+
+/// <summary>
+/// Common constants used across source generators.
+/// </summary>
+public static class Constants
+{
+    /// <summary>
+    /// Unix-style line feed character used for consistent line endings in generated code.
+    /// </summary>
+    public const char LineFeed = '\n';
+}

src/Atc.SourceGenerators/Extensions/StringBuilderExtensions.cs

@@ -22,7 +22,7 @@ public static StringBuilder AppendLineLf(
             builder.Append(value);
         }
 
-        builder.Append('\n');
+        builder.Append(Constants.LineFeed);
         return builder;
     }
 }