| 1 | // Copyright (C) 2020 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 |
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| 3 | #ifndef SINGLETON_H |
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| 4 | #define SINGLETON_H |
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| 5 | |
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| 6 | QT_BEGIN_NAMESPACE |
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| 7 | |
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| 8 | /*! |
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| 9 | \class Singleton |
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| 10 | \internal |
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| 11 | |
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| 12 | Class template for singleton objects in QDoc. |
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| 13 | */ |
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| 14 | template<typename T> |
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| 15 | class Singleton |
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| 16 | { |
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| 17 | public: |
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| 18 | Singleton(const Singleton &) = delete; |
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| 19 | Singleton &operator=(const Singleton &) = delete; |
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| 20 | static T &instance() |
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| 21 | { |
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| 22 | static T s_instance {}; |
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| 23 | return s_instance; |
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| 24 | } |
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| 25 | |
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| 26 | protected: |
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| 27 | Singleton() = default; |
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| 28 | }; |
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| 29 | |
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| 30 | QT_END_NAMESPACE |
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| 31 | |
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| 32 | #endif // SINGLETON_H |
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| 33 | |
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