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#ifndef UNWIND_H
#define UNWIND_H
template <typename T>
class unwind_var
{
public:
unwind_var(T &val_, T newval, T reset_to) : val(val_), oldval(reset_to)
{
val = newval;
}
unwind_var(T &val_, T newval) : val(val_), oldval(val_)
{
val = newval;
}
unwind_var(T &val_) : val(val_), oldval(val_) { }
~unwind_var()
{
val = oldval;
}
T value() const
{
return val;
}
T original_value() const
{
return oldval;
}
private:
T &val;
T oldval;
};
typedef unwind_var<bool> unwind_bool;
#endif
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