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+#ifndef SELRESTR_H_50652FB7
+#define SELRESTR_H_50652FB7
+
+#include <list>
+#include <string>
+#include <json.hpp>
+
+namespace verbly {
+  namespace generator {
+    
+    class selrestr {
+    public:
+      enum class type {
+        empty,
+        singleton,
+        group
+      };
+      
+      // Copy and move constructors
+      
+      selrestr(const selrestr& other);
+      selrestr(selrestr&& other);
+      
+      // Assignment
+      
+      selrestr& operator=(selrestr other);
+      
+      // Swap
+      
+      friend void swap(selrestr& first, selrestr& second);
+      
+      // Destructor
+      
+      ~selrestr();
+      
+      // Generic accessors
+      
+      type getType() const
+      {
+        return type_;
+      }
+      
+      // Empty
+      
+      selrestr();
+      
+      // Singleton
+      
+      selrestr(std::string restriction, bool pos);
+      
+      std::string getRestriction() const;
+      
+      bool getPos() const;
+      
+      // Group
+      
+      selrestr(std::list<selrestr> children, bool orlogic);
+      
+      std::list<selrestr> getChildren() const;
+      
+      std::list<selrestr>::const_iterator begin() const;
+      
+      std::list<selrestr>::const_iterator end() const;
+      
+      bool getOrlogic() const;
+      
+      // Helpers
+      
+      nlohmann::json toJson() const;
+      
+    private:
+      union {
+        struct {
+          bool pos;
+          std::string restriction;
+        } singleton_;
+        struct {
+          std::list<selrestr> children;
+          bool orlogic;
+        } group_;
+      };
+      type type_;
+    };
+    
+  };
+};
+
+#endif /* end of include guard: SELRESTR_H_50652FB7 */