nlua.patch

diff --git a/src/Lua.cs b/src/Lua.cs
index fd8a85f..dd799ce 100644
--- a/src/Lua.cs
+++ b/src/Lua.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Linq;
 using System.Reflection;
 using System.Collections.Generic;
@@ -340,9 +340,7 @@ namespace NLua
             _luaState = null;
         }
 
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int PanicCallback(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
diff --git a/src/Metatables.cs b/src/Metatables.cs
index c42e5d9..8ee9208 100644
--- a/src/Metatables.cs
+++ b/src/Metatables.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Linq;
 using System.Collections;
 using System.Reflection;
@@ -104,9 +104,7 @@ namespace NLua
         /*
          * __call metafunction of CLR delegates, retrieves and calls the delegate.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int RunFunctionDelegate(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -127,9 +125,7 @@ namespace NLua
         /*
          * __gc metafunction of CLR objects.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int CollectObject(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -150,9 +146,7 @@ namespace NLua
         /*
          * __tostring metafunction of CLR objects.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int ToStringLua(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -176,9 +170,7 @@ namespace NLua
         /*
          * __add metafunction of CLR objects.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int AddLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -194,9 +186,7 @@ namespace NLua
         /*
         * __sub metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int SubtractLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -212,9 +202,7 @@ namespace NLua
         /*
         * __mul metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int MultiplyLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -230,9 +218,7 @@ namespace NLua
         /*
         * __div metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int DivideLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -248,9 +234,7 @@ namespace NLua
         /*
         * __mod metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int ModLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -266,9 +250,7 @@ namespace NLua
         /*
         * __unm metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int UnaryNegationLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -308,9 +290,7 @@ namespace NLua
         /*
         * __eq metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int EqualLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -326,9 +306,7 @@ namespace NLua
         /*
         * __lt metafunction of CLR objects.
         */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int LessThanLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -344,9 +322,7 @@ namespace NLua
         /*
          * __le metafunction of CLR objects.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int LessThanOrEqualLua(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -394,9 +370,7 @@ namespace NLua
          * either the value of the member or a delegate to call it.
          * If the member does not exist returns nil.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int GetMethod(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -698,9 +672,7 @@ namespace NLua
          * __index metafunction of base classes (the base field of Lua tables).
          * Adds a prefix to the method name to call the base version of the method.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int GetBaseMethod(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -1001,9 +973,7 @@ namespace NLua
          * the member name and the value to be stored as arguments. Throws
          * and error if the assignment is invalid.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int SetFieldOrProperty(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -1206,9 +1176,7 @@ namespace NLua
         /*
          * __index metafunction of type references, works on static members.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int GetClassMethod(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -1252,9 +1220,7 @@ namespace NLua
         /*
          * __newindex function of type references, works on static members.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int SetClassFieldOrProperty(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -1284,9 +1250,7 @@ namespace NLua
         /*
          * __call metafunction of Delegates. 
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         static int CallDelegate(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
@@ -1353,9 +1317,7 @@ namespace NLua
          * found or if the arguments are invalid. Throws an error if the constructor
          * generates an exception.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int CallConstructor(IntPtr state)
         {
             var luaState = LuaState.FromIntPtr(state);
diff --git a/src/ObjectTranslator.cs b/src/ObjectTranslator.cs
index a6233fa..fbe0850 100644
--- a/src/ObjectTranslator.cs
+++ b/src/ObjectTranslator.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using System.Reflection;
 using System.Collections.Generic;
@@ -18,6 +18,12 @@ using LuaState = KeraLua.Lua;
 using LuaNativeFunction = KeraLua.LuaFunction;
 using System.Runtime.CompilerServices;
 
+
+[AttributeUsage (AttributeTargets.Method)]
+sealed class MonoPInvokeCallbackAttribute : Attribute {
+    public MonoPInvokeCallbackAttribute (Type t) {}
+}
+
 namespace NLua
 {
     public class ObjectTranslator
@@ -258,9 +264,7 @@ namespace NLua
          * Implementation of load_assembly. Throws an error
          * if the assembly is not found.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int LoadAssembly(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -362,9 +366,7 @@ namespace NLua
          * Implementation of import_type. Returns nil if the
          * type is not found.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int ImportType(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -390,9 +392,7 @@ namespace NLua
          * argument in the stack) as an object subclassing the
          * type passed as second argument in the stack.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int RegisterTable(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -457,9 +457,7 @@ namespace NLua
          * Implementation of free_object. Clears the metatable and the
          * base field, freeing the created object for garbage-collection
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int UnregisterTable(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -514,9 +512,7 @@ namespace NLua
          * Implementation of get_method_bysig. Returns nil
          * if no matching method is not found.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int GetMethodSignature(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -579,9 +575,7 @@ namespace NLua
          * Implementation of get_constructor_bysig. Returns nil
          * if no matching constructor is found.
          */
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int GetConstructorSignature(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -1174,9 +1168,7 @@ namespace NLua
             return 2;
         }
 
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int CType(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);
@@ -1194,9 +1186,7 @@ namespace NLua
             return 1;
         }
 
-#if __IOS__ || __TVOS__ || __WATCHOS__ || __MACCATALYST__
         [MonoPInvokeCallback(typeof(LuaNativeFunction))]
-#endif
         private static int EnumFromInt(IntPtr luaState)
         {
             var state = LuaState.FromIntPtr(luaState);