*misc

1 files changed, 30 insertions, 1 deletions

diff --git a/source/3rd-party/Luax/luax_state.inl b/source/3rd-party/Luax/luax_state.inl
index 06d9350..4af45a2 100644
--- a/source/3rd-party/Luax/luax_state.inl
+++ b/source/3rd-party/Luax/luax_state.inl
@@ -125,7 +125,7 @@ namespace Luax
 	}
 
 	template<typename T>
-	T* LuaxState::GetLuaUserdata(int idx)
+	T* LuaxState::GetUserdata(int idx)
 	{
 		void* p = nullptr;
 
@@ -137,4 +137,33 @@ namespace Luax
 		return static_cast<T*>(p);
 	}
 
+	template<typename T> 
+	T* LuaxState::CheckUserdata(int idx)
+	{
+		if (IsType(idx, LUA_TUSERDATA))
+		{
+			if (lua_getmetatable(mState, idx)) // ref table 
+			{
+				if (lua_getmetatable(mState, -1)) // member table 
+				{
+					if (lua_getmetatable(mState, -1)) // class table 
+					{
+						T::PushLuaxClassTable(*this); // target class table
+						if (lua_rawequal(mState, -1, -2))
+						{
+							Pop(4); // ref\member\class\target class
+							T* udata = GetUserdata<T>(idx);
+							return udata; // userdata
+						}
+						Pop(2); // target class table\class table
+					}
+					Pop(1); // member table 
+				}
+				Pop(1); // ref table
+			}
+		}
+		luaL_typerror(mState, idx, T::GetLuaxClassName());
+		return nullptr;
+	}
+
 }
\ No newline at end of file