refactor: move class EnableNonOwnerReferences into separate header file

include/bedrock/core/utility/enable_non_owner_references.h

@@ -0,0 +1,41 @@
+// Copyright (c) 2024, The Endstone Project. (https://endstone.dev) All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <memory>
+#include <stdexcept>
+
+namespace Bedrock {
+
+class EnableNonOwnerReferences {
+public:
+    struct ControlBlock {
+        EnableNonOwnerReferences *ptr;
+    };
+
+    EnableNonOwnerReferences()
+    {
+        control_block_ = std::make_shared<ControlBlock>();
+        control_block_->ptr = this;
+    }
+    virtual ~EnableNonOwnerReferences() = default;
+
+private:
+    template <typename T>
+    friend class NonOwnerPointer;
+
+    std::shared_ptr<ControlBlock> control_block_;
+};
+}  // namespace Bedrock

include/bedrock/core/utility/non_owner_pointer.h

@@ -17,27 +17,9 @@
 #include <memory>
 #include <stdexcept>
 
-namespace Bedrock {
-
-class EnableNonOwnerReferences {
-public:
-    struct ControlBlock {
-        EnableNonOwnerReferences *ptr;
-    };
+#include "bedrock/core/utility/enable_non_owner_references.h"
 
-    EnableNonOwnerReferences()
-    {
-        control_block_ = std::make_shared<ControlBlock>();
-        control_block_->ptr = this;
-    }
-    virtual ~EnableNonOwnerReferences() = default;
-
-private:
-    template <typename T>
-    friend class NonOwnerPointer;
-
-    std::shared_ptr<ControlBlock> control_block_;
-};
+namespace Bedrock {
 
 template <class T>
 class NonOwnerPointer {