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| |
| #ifndef QSCOPEDVALUEROLLBACK_H |
| #define QSCOPEDVALUEROLLBACK_H |
| |
| #include <QtCore/qglobal.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| template <typename T> |
| class QScopedValueRollback |
| { |
| public: |
| explicit QScopedValueRollback(T &var) : |
| varRef(var), oldValue(var) |
| { |
| } |
| |
| explicit QScopedValueRollback(T &var, T value) : |
| varRef(var), oldValue(var) |
| { |
| varRef = qMove(value); |
| } |
| |
| ~QScopedValueRollback() |
| { |
| varRef = qMove(oldValue); |
| } |
| |
| void commit() |
| { |
| oldValue = varRef; |
| } |
| |
| private: |
| T& varRef; |
| T oldValue; |
| |
| Q_DISABLE_COPY(QScopedValueRollback) |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QSCOPEDVALUEROLLBACK_H |