ScopedAssign.hh

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#ifndef SCOPEDASSIGN_HH
#define SCOPEDASSIGN_HH
 
template<typename T> class ScopedAssign
{
public:
        ScopedAssign(const ScopedAssign&) = delete;
        ScopedAssign(ScopedAssign&&) = delete;
        ScopedAssign& operator=(const ScopedAssign&) = delete;
        ScopedAssign& operator=(ScopedAssign&&) = delete;
 
        [[nodiscard]] ScopedAssign(T& var_, T newValue)
                : var(var_)
        {
                oldValue = var;
                var = newValue;
        }
        ~ScopedAssign()
        {
                var = oldValue;
        }
private:
        T& var;
        T oldValue;
};
 
#endif