virtual Condition *flatten() const { return clone(); }
virtual bool can_merge(const Condition &, const CompoundCondition &) const { return false; }
virtual Condition *merge(const std::vector<Condition *> &, const CompoundCondition &) const { return 0; }
virtual Condition *flatten() const { return clone(); }
virtual bool can_merge(const Condition &, const CompoundCondition &) const { return false; }
virtual Condition *merge(const std::vector<Condition *> &, const CompoundCondition &) const { return 0; }