#ifndef SASS_AST_DEF_MACROS_H

#define SASS_AST_DEF_MACROS_H

// Helper class to switch a flag and revert once we go out of scope

template <class T>

class LocalOption {

  private:

    T* var; // pointer to original variable

    T orig; // copy of the original option

  public:

    LocalOption(T& var)

    {

      this->var = &var;

      this->orig = var;

    }

    LocalOption(T& var, T orig)

    {

      this->var = &var;

      this->orig = var;

      *(this->var) = orig;

    }

    void reset()

    {

      *(this->var) = this->orig;

    }

    ~LocalOption() {

      *(this->var) = this->orig;

    }

};

#define LOCAL_FLAG(name,opt) LocalOption<bool> flag_##name(name, opt)

#define ATTACH_OPERATIONS()\

virtual void perform(Operation<void>* op) { (*op)(this); }\

virtual AST_Node_Ptr perform(Operation<AST_Node_Ptr>* op) { return (*op)(this); }\

virtual Statement_Ptr perform(Operation<Statement_Ptr>* op) { return (*op)(this); }\

virtual Expression_Ptr perform(Operation<Expression_Ptr>* op) { return (*op)(this); }\

virtual Selector_Ptr perform(Operation<Selector_Ptr>* op) { return (*op)(this); }\

virtual std::string perform(Operation<std::string>* op) { return (*op)(this); }\

virtual union Sass_Value* perform(Operation<union Sass_Value*>* op) { return (*op)(this); }\

virtual Value_Ptr perform(Operation<Value_Ptr>* op) { return (*op)(this); }

#define ADD_PROPERTY(type, name)\

protected:\

  type name##_;\

public:\

  type name() const        { return name##_; }\

  type name(type name##__) { return name##_ = name##__; }\

private:

#define HASH_PROPERTY(type, name)\

protected:\

  type name##_;\

public:\

  type name() const        { return name##_; }\

  type name(type name##__) { hash_ = 0; return name##_ = name##__; }\

private:

#define ADD_CONSTREF(type, name) \

protected: \

  type name##_; \

public: \

  const type& name() const { return name##_; } \

  void name(type name##__) { name##_ = name##__; } \

private:

#define HASH_CONSTREF(type, name) \

protected: \

  type name##_; \

public: \

  const type& name() const { return name##_; } \

  void name(type name##__) { hash_ = 0; name##_ = name##__; } \

private:

#endif