[LOADED_DOCS: 3 files, no new loads]

NativeAOT: fallback for delegates, exclude MessagePack

Added AYCODE_NATIVEAOT symbol for AOT builds and excluded MessagePack benchmarks from NativeAOT due to lack of AOT support. Updated AcSerializerCommon to use reflection-based delegates when dynamic code is unavailable, ensuring compatibility with both JIT and AOT. Added explanatory comments throughout.

AyCode.Core.Serializers.Console/AyCode.Core.Serializers.Console.csproj

@@ -21,6 +21,12 @@
 		<PublishAot>true</PublishAot>
 		<InvariantGlobalization>true</InvariantGlobalization>
 
+		<!-- AYCODE_NATIVEAOT compile symbol — defined whenever PublishAot=true is in effect.
+		     Used by Program.cs to #if-out MessagePack benchmark sites: MessagePack v3 has no AOT-compatible
+		     resolver in this project's setup (DynamicGenericResolver fails on trimmed ListFormatter<T>).
+		     This is a benchmark-project-local workaround and never ships as NuGet — directives are safe here. -->
+		<DefineConstants>$(DefineConstants);AYCODE_NATIVEAOT</DefineConstants>
+
 		<!-- Először tegyük zsongva: nyeljük le a trim warning-okat hogy buildelni tudjon. -->
 		<!-- Ezt később vissza lehet kapcsolni szigorúra. -->
 		<SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings>

AyCode.Core.Serializers.Console/Program.cs

@@ -4,8 +4,10 @@ using AyCode.Core.Serializers.Binaries;
 using AyCode.Core.Tests.Serialization;   // DrainFromAsync extension (test-only, used by benchmark)
 using AyCode.Core.Tests.TestModels;
 using MemoryPack;
+#if !AYCODE_NATIVEAOT
 using MessagePack;
 using MessagePack.Resolvers;
+#endif
 using Microsoft.Extensions.Options;
 using System.Buffers;
 using System.Diagnostics;
@@ -52,7 +54,9 @@ public static class Program
     // Engine identifiers (used in Engine column + comparison logic)
     private const string EngineAcBinary = "AcBinary";
     private const string EngineMemoryPack = "MemoryPack";
+#if !AYCODE_NATIVEAOT
     private const string EngineMessagePack = "MessagePack";
+#endif
     private const string EngineSystemTextJson = "System.Text.Json";
 
     // IO mode identifiers (used in IO column + comparison logic)
@@ -557,9 +561,9 @@ public static class Program
             new AcBinaryBenchmark(testData.Order, AcBinarySerializerOptions.FastMode, "FastMode"),
             // Fastest Byte[] — Runtime path (UseGeneratedCode=false). Same wire/options, no source-generated dispatch.
             // Always paired with the SGen variant so every layer can compare the SGen speed-up apples-to-apples.
-            // COMMENTED: Reflection.Emit-based dispatch crashes under NativeAOT (PlatformNotSupportedException).
-            // Re-enable for JIT-mode benchmarks where SGen-vs-Runtime delta matters.
-            //new AcBinaryBenchmark(testData.Order, binaryFastModeNoSgenOption, "FastMode"),
+            // NativeAOT-safe: AcSerializerCommon.Create*Getter/Setter falls back to reflection-based delegates
+            // when RuntimeFeature.IsDynamicCodeSupported is false (slower but works under AOT publish).
+            new AcBinaryBenchmark(testData.Order, binaryFastModeNoSgenOption, "FastMode"),
             // Default preset Byte[] — RefHandling=OnlyId (deduplicates IId-shared references on the wire) +
             // UseStringInterning=All (deduplicates repeated strings). Showcases the Default preset's wire-size
             // and CPU trade-off vs FastMode on the ~20% IId-ref / repeated-string test data.
@@ -602,7 +606,12 @@ public static class Program
             // ============================================================
             // MessagePack — for legacy comparison
             // ============================================================
+#if !AYCODE_NATIVEAOT
+            // MessagePack v3's DynamicGenericResolver uses Activator.CreateInstance on trimmed
+            // ListFormatter<T> et al. — fails under NativeAOT publish with "No parameterless constructor".
+            // Excluded from the AOT build; available for regular JIT runs only.
             new MessagePackBenchmark(testData.Order, "ContractBased"),
+#endif
 
             // System.Text.Json (commented — JSON serializer for reference; not in active suite)
             //new SystemTextJsonBenchmark(testData.Order, "Default")
@@ -1031,6 +1040,11 @@ public static class Program
         }
     }
 
+#if !AYCODE_NATIVEAOT
+    // MessagePack benchmark — excluded from NativeAOT build because v3's StandardResolver falls back
+    // to DynamicGenericResolver for closed-generic types (List<TestOrderItem> et al.), which uses
+    // Activator.CreateInstance on formatter types the AOT trimmer drops → MissingMethodException at runtime.
+    // Available for regular JIT runs (`dotnet run`) only.
     private sealed class MessagePackBenchmark : ISerializerBenchmark
     {
         private readonly TestOrder _order;
@@ -1083,6 +1097,7 @@ public static class Program
             return DeepEqualsViaJson(_order, roundTripped);
         }
     }
+#endif
 
     /// <summary>
     /// Benchmarks AcBinary via the IBufferWriter overload with a pre-allocated, reused ArrayBufferWriter.

AyCode.Core/Serializers/AcSerializerCommon.cs

@@ -465,6 +465,12 @@ public static class AcSerializerCommon
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static Func<object, object?> CreateCompiledGetter(Type declaringType, PropertyInfo prop)
     {
+        // NativeAOT (and other no-dynamic-code targets): fall back to plain reflection.
+        // The returned delegate is cached per-property by the caller, so the indirection cost is paid
+        // only at cache-population time — hot path is a direct delegate invocation either way.
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+            return prop.GetValue;
+
         var objParam = LExpression.Parameter(typeof(object), "obj");
         var castExpr = LExpression.Convert(objParam, declaringType);
         var propAccess = LExpression.Property(castExpr, prop);
@@ -478,6 +484,9 @@ public static class AcSerializerCommon
     /// </summary>
     public static Action<object, object?> CreateCompiledSetter(Type declaringType, PropertyInfo prop)
     {
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+            return prop.SetValue;
+
         var targetParam = LExpression.Parameter(typeof(object), "target");
         var valueParam = LExpression.Parameter(typeof(object), "value");
 
@@ -524,6 +533,9 @@ public static class AcSerializerCommon
         var ctor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public, null, Type.EmptyTypes, null);
         if (ctor == null) return null;
 
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+            return () => ctor.Invoke(null);
+
         var newExpr = LExpression.New(ctor);
         var convert = LExpression.Convert(newExpr, typeof(object));
         return LExpression.Lambda<Func<object>>(convert).Compile();
@@ -534,15 +546,18 @@ public static class AcSerializerCommon
     /// </summary>
     public static Func<object, TProperty> CreateTypedGetter<TProperty>(Type declaringType, PropertyInfo prop)
     {
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+            return obj => (TProperty)prop.GetValue(obj)!;
+
         var objParam = LExpression.Parameter(typeof(object), "obj");
         var castExpr = LExpression.Convert(objParam, declaringType);
         var propAccess = LExpression.Property(castExpr, prop);
-        
+
         // Only convert if property type differs from TProperty (avoids unnecessary boxing)
         Expression resultExpr = prop.PropertyType == typeof(TProperty)
             ? propAccess
             : LExpression.Convert(propAccess, typeof(TProperty));
-            
+
         return LExpression.Lambda<Func<object, TProperty>>(resultExpr, objParam).Compile();
     }
     
@@ -551,6 +566,9 @@ public static class AcSerializerCommon
     /// </summary>
     public static Func<object, int> CreateEnumGetter(Type declaringType, PropertyInfo prop)
     {
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+            return obj => Convert.ToInt32(prop.GetValue(obj));
+
         var objParam = LExpression.Parameter(typeof(object), "obj");
         var castExpr = LExpression.Convert(objParam, declaringType);
         var propAccess = LExpression.Property(castExpr, prop);
@@ -563,6 +581,9 @@ public static class AcSerializerCommon
     /// </summary>
     public static Action<object, TProperty> CreateTypedSetter<TProperty>(Type declaringType, PropertyInfo prop)
     {
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+            return (obj, value) => prop.SetValue(obj, value);
+
         var objParam = LExpression.Parameter(typeof(object), "obj");
         var valueParam = LExpression.Parameter(typeof(TProperty), "value");
         var castExpr = LExpression.Convert(objParam, declaringType);
@@ -576,6 +597,12 @@ public static class AcSerializerCommon
     /// </summary>
     public static Action<object, int> CreateEnumSetter(Type declaringType, PropertyInfo prop)
     {
+        if (!RuntimeFeature.IsDynamicCodeSupported)
+        {
+            var enumType = prop.PropertyType;
+            return (obj, value) => prop.SetValue(obj, Enum.ToObject(enumType, value));
+        }
+
         var objParam = LExpression.Parameter(typeof(object), "obj");
         var valueParam = LExpression.Parameter(typeof(int), "value");
         var castExpr = LExpression.Convert(objParam, declaringType);