From f06fee17cc694bc5947f041f8f0e800558d53d9c Mon Sep 17 00:00:00 2001
From: Kieran Kihn <114803508+kierankihn@users.noreply.github.com>
Date: Sun, 16 Nov 2025 20:50:42 +0800
Subject: [PATCH] fix(common): add defination of `COMMON::Utils::instance_`

---
 src/common/Utils.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/common/Utils.cpp b/src/common/Utils.cpp
index 05d00f2..d9d08c2 100644
--- a/src/common/Utils.cpp
+++ b/src/common/Utils.cpp
@@ -12,11 +12,13 @@ namespace UNO::COMMON {
         return gen_;
     }
 
+    Utils* Utils::instance_ = nullptr;
+
     Utils *Utils::getInstance() {
-        if (Utils::instance_ == nullptr) {
-            Utils::instance_ = new Utils();
+        if (instance_ == nullptr) {
+            instance_ = new Utils();
         }
-        return Utils::instance_;
+        return instance_;
     }
     Random &Utils::getRandom() {
         return this->random_;