diff options
Diffstat (limited to 'src/corelib/tools/qscopedvaluerollback.h')
-rw-r--r-- | src/corelib/tools/qscopedvaluerollback.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/corelib/tools/qscopedvaluerollback.h b/src/corelib/tools/qscopedvaluerollback.h index a4a451b0c7..0ae3efd0c0 100644 --- a/src/corelib/tools/qscopedvaluerollback.h +++ b/src/corelib/tools/qscopedvaluerollback.h @@ -9,17 +9,20 @@ QT_BEGIN_NAMESPACE template <typename T> -class [[nodiscard]] QScopedValueRollback +class QScopedValueRollback { public: + Q_NODISCARD_CTOR explicit constexpr QScopedValueRollback(T &var) : varRef(var), oldValue(var) { } + Q_NODISCARD_CTOR explicit constexpr QScopedValueRollback(T &var, T value) - : varRef(var), oldValue(qExchange(var, std::move(value))) + : varRef(var), oldValue(std::move(var)) // ### C++20: std::exchange(var, std::move(value)) { + var = std::move(value); } #if __cpp_constexpr >= 201907L |