From b4fa5849aef2fbbe5a9956f37455b61dab973e8b Mon Sep 17 00:00:00 2001
From: PopSlime <popslime@qq.com>
Date: Sun, 6 Nov 2022 14:19:00 +0800
Subject: [PATCH] Add error type and null type.

---
 Assets/Cryville/Common/Pdt/PdtInternalType.cs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Assets/Cryville/Common/Pdt/PdtInternalType.cs b/Assets/Cryville/Common/Pdt/PdtInternalType.cs
index 4cca633..3e9ded1 100644
--- a/Assets/Cryville/Common/Pdt/PdtInternalType.cs
+++ b/Assets/Cryville/Common/Pdt/PdtInternalType.cs
@@ -3,12 +3,19 @@
 	/// The identifiers of the internal types of PDT.
 	/// </summary>
 	public static class PdtInternalType {
-		internal readonly static int Error = 0x00525245;
+		/// <summary>
+		/// Error type.
+		/// </summary>
+		public readonly static int Error = 0x00525245;
 		/// <summary>
 		/// Array of a same variable-length type, with a suffix indicating the element count and the element type.
 		/// </summary>
 		public readonly static int Array = 0x00525241;
 		/// <summary>
+		/// Null type.
+		/// </summary>
+		public readonly static int Null = 0x4c4c554e;
+		/// <summary>
 		/// IEEE 754 32-bit floating-point number.
 		/// </summary>
 		public readonly static int Number = 0x004d554e;