feat: initial commit - HJHA game server full source

6 major server modules (PdkFriendServer/GlobalSever/ServerCore/GameModule/GameNetModule) +
game logic (GameFix/GameDAL/ServerData) +
network layer (NetWorkMessage) +
data layer (ObjectModel) +
utilities (MrWu/Core/Config/CloudAPI/dll) +
adapters (zyxAdapter/base)

.NET 8.0 C# solution, 16 projects, 958 source files

GameDAL/ExpressionsParser/IValueComparer.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ExpressionsParser {
+	/// <summary>
+	/// Exposes a method that compares two objects.
+	/// </summary>
+	/// <remarks>
+	/// Unlike <see cref="System.Collections.IComparer"/> this interface allows to return null as comparison result 
+	/// for case when values cannot be compared without throwing an exception.
+	/// </remarks>
+	public interface IValueComparer {
+
+		/// <summary>
+		/// Compares two objects and returns a value indicating whether one is less than, equal to, or greater than the other.
+		/// </summary>
+		/// <returns>A signed integer that indicates the relative values of x and y or null if values cannot be compared.</returns>
+		int? Compare(object x, object y);
+    }
+
+}