A RAII style class which calls a function at end of scope.
Example usage:
auto cleanup = qScopeGuard([] { <my cleanup code> ; });
[ChangeLog][QtCore] Introduced QScopeGuard.
Task-number: QTBUG-62894
Change-Id: Ife67f5c76255a1fafbae03367263da0bac9a0070
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
