Merge pull request MessagePack-CSharp#1461 from LineSmarts/master

Fix for "System.NotImplementedException: byref delegate" (second attempt)

Author: AArnott

src/MessagePack.UnityClient/Assets/Scripts/MessagePack/MessagePackSerializer.NonGeneric.cs

@@ -82,6 +82,22 @@ public static object Deserialize(Type type, ReadOnlySequence<byte> bytes, Messag
             return GetOrAdd(type).Deserialize_ReadOnlySequence_Options_CancellationToken.Invoke(bytes, options, cancellationToken);
         }
 
+        /// <summary>
+        /// Helper method used by reflection.
+        /// </summary>
+        private static void SerializeSemiGeneric<T>(ref MessagePackWriter writer, object valueObject, MessagePackSerializerOptions options = null)
+        {
+            Serialize(ref writer, (T)valueObject, options);
+        }
+
+        /// <summary>
+        /// Helper method used by reflection.
+        /// </summary>
+        private static object DeserializeSemiGeneric<T>(ref MessagePackReader reader, MessagePackSerializerOptions options = null)
+        {
+            return Deserialize<T>(ref reader, options);
+        }
+
         private static async ValueTask<object> DeserializeObjectAsync<T>(Stream stream, MessagePackSerializerOptions options, CancellationToken cancellationToken) => await DeserializeAsync<T>(stream, options, cancellationToken).ConfigureAwait(false);
 
         private static CompiledMethods GetOrAdd(Type type)
@@ -219,39 +235,22 @@ internal CompiledMethods(Type type)
                 }
 
                 {
-                    // public static void Serialize<T>(ref MessagePackWriter writer, T obj, MessagePackSerializerOptions options)
-                    MethodInfo serialize = GetMethod(nameof(Serialize), type, new Type[] { typeof(MessagePackWriter).MakeByRefType(), null, typeof(MessagePackSerializerOptions) });
+                    // private static void SerializeSemiGeneric<T>(ref MessagePackWriter writer, object obj, MessagePackSerializerOptions options)
+                    MethodInfo serialize = GetMethod(nameof(SerializeSemiGeneric), type, new Type[] { typeof(MessagePackWriter).MakeByRefType(), typeof(object), typeof(MessagePackSerializerOptions) });
 #if ENABLE_IL2CPP
                     this.Serialize_MessagePackWriter_T_Options = (ref MessagePackWriter x, object y, MessagePackSerializerOptions z) => ThrowRefStructNotSupported();
 #else
-                    ParameterExpression param1 = Expression.Parameter(typeof(MessagePackWriter).MakeByRefType(), "writer");
-                    ParameterExpression param2 = Expression.Parameter(typeof(object), "obj");
-                    ParameterExpression param3 = Expression.Parameter(typeof(MessagePackSerializerOptions), "options");
-
-                    MethodCallExpression body = Expression.Call(
-                        null,
-                        serialize,
-                        param1,
-                        ti.IsValueType ? Expression.Unbox(param2, type) : Expression.Convert(param2, type),
-                        param3);
-                    MessagePackWriterSerialize lambda = Expression.Lambda<MessagePackWriterSerialize>(body, param1, param2, param3).Compile(PreferInterpretation);
-
-                    this.Serialize_MessagePackWriter_T_Options = lambda;
+                    this.Serialize_MessagePackWriter_T_Options = (MessagePackWriterSerialize)serialize.CreateDelegate(typeof(MessagePackWriterSerialize));
 #endif
                 }
 
                 {
-                    // public static T Deserialize<T>(ref MessagePackReader reader, MessagePackSerializerOptions options)
-                    MethodInfo deserialize = GetMethod(nameof(Deserialize), type, new Type[] { typeof(MessagePackReader).MakeByRefType(), typeof(MessagePackSerializerOptions) });
+                    // private static object DeserializeSemiGeneric<T>(ref MessagePackReader reader, MessagePackSerializerOptions options)
+                    MethodInfo deserialize = GetMethod(nameof(DeserializeSemiGeneric), type, new Type[] { typeof(MessagePackReader).MakeByRefType(), typeof(MessagePackSerializerOptions) });
 #if ENABLE_IL2CPP
                     this.Deserialize_MessagePackReader_Options = (ref MessagePackReader reader, MessagePackSerializerOptions options) => { ThrowRefStructNotSupported(); return null; };
 #else
-                    ParameterExpression param1 = Expression.Parameter(typeof(MessagePackReader).MakeByRefType(), "reader");
-                    ParameterExpression param2 = Expression.Parameter(typeof(MessagePackSerializerOptions), "options");
-                    UnaryExpression body = Expression.Convert(Expression.Call(null, deserialize, param1, param2), typeof(object));
-                    MessagePackReaderDeserialize lambda = Expression.Lambda<MessagePackReaderDeserialize>(body, param1, param2).Compile();
-
-                    this.Deserialize_MessagePackReader_Options = lambda;
+                    this.Deserialize_MessagePackReader_Options = (MessagePackReaderDeserialize)deserialize.CreateDelegate(typeof(MessagePackReaderDeserialize));
 #endif
                 }
 

src/MessagePack.UnityClient/Assets/Scripts/MessagePack/Resolvers/DynamicObjectResolver.cs

@@ -1264,6 +1264,9 @@ void OnNotFound()
                     il.Emit(OpCodes.Br, readNext);
                 }
 
+#if NET_STANDARD_2_0
+                throw new NotImplementedException("NET_STANDARD_2_0 directive was used");
+#else
                 if (canOverwrite)
                 {
                     automata.EmitMatch(il, buffer, longKey, OnFoundAssignDirect, OnNotFound);
@@ -1272,6 +1275,7 @@ void OnNotFound()
                 {
                     automata.EmitMatch(il, buffer, longKey, OnFoundAssignLocalVariable, OnNotFound);
                 }
+#endif
 
                 il.MarkLabel(readNext);
                 reader.EmitLdarg();