1 files changed, 32 insertions, 0 deletions
diff --git a/src/qdoc/qdoc/src/qdoc/singleton.h b/src/qdoc/qdoc/src/qdoc/singleton.h
new file mode 100644
index 000000000..085a5ea64
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+++ b/src/qdoc/qdoc/src/qdoc/singleton.h
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+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+#ifndef SINGLETON_H
+#define SINGLETON_H
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class Singleton
+    \internal
+
+    Class template for singleton objects in QDoc.
+ */
+template<typename T>
+class Singleton
+{
+public:
+    Singleton(const Singleton &) = delete;
+    Singleton &operator=(const Singleton &) = delete;
+    static T &instance()
+    {
+        static T s_instance {};
+        return s_instance;
+    }
+
+protected:
+    Singleton() = default;
+};
+
+QT_END_NAMESPACE
+
+#endif // SINGLETON_H