From 05ada6189bb2ae53a003703bad5527cdc0d28909 Mon Sep 17 00:00:00 2001
From: iamboss <iamboss@superhightech.com.tw>
Date: Sun, 24 May 2026 10:34:11 +0800
Subject: [PATCH] refactor(Hi.Sample): convert DemoBuildMachineTool to
 Reg(XFactory factory=null)

Static ctor rewritten as public static void Reg(XFactory factory = null).

Part of the workspace-wide ~270-class XFactory refactor; see HiGeom commit
for the XFactory instance refactor and full pattern rationale.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
---
 MachineTool/DemoBuildMachineTool.cs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/MachineTool/DemoBuildMachineTool.cs b/MachineTool/DemoBuildMachineTool.cs
index 18fb746..38467d2 100644
--- a/MachineTool/DemoBuildMachineTool.cs
+++ b/MachineTool/DemoBuildMachineTool.cs
@@ -23,9 +23,15 @@ namespace Sample.MachineTool
     /// </remarks>
     public class DemoBuildMachineTool : IGetCodeXyzabcMachineTool
     {
-        static DemoBuildMachineTool()
+        /// <summary>
+        /// Registers this type's deserializer with the given <see cref="XFactory"/>
+        /// (or <see cref="XFactory.Default"/> when <paramref name="factory"/> is
+        /// <c>null</c>). Idempotent.
+        /// </summary>
+        public static void Reg(XFactory factory = null)
         {
-            XFactory.Generators.Add(XName, (xml, baseDirectory, relFile, progress, res) => new DemoBuildMachineTool());
+            factory ??= XFactory.Default;
+            factory.Generators.TryAdd(XName, (xml, baseDirectory, relFile, progress, res) => new DemoBuildMachineTool());
         }
         /// <summary>
         /// Generates an XYZ-ABC machine tool instance from embedded resources.