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+#ifndef TOKEN_H_AD62C505
+#define TOKEN_H_AD62C505
+
+#include <string>
+#include <list>
+#include <sstream>
+
+namespace verbly {
+  
+  class verb;
+  
+  class selrestr {
+  };
+  
+  class synrestr {
+  };
+  
+  enum class fillin_type {
+    noun_phrase,
+    participle_phrase,
+    adjective,
+    adverb
+  };
+  
+  class token {
+    public:
+      enum class type {
+        verb,
+        fillin,
+        string,
+        utterance
+      };
+      
+    protected:
+      // General
+      type _type;
+      
+      token(type _type);
+      
+    public:
+      enum type token_type() const;
+      
+      virtual bool complete() const = 0;
+      virtual std::string compile() const = 0;
+      virtual token* copy() const = 0;
+  };
+  
+  class verb_token : public token {
+    public:
+      enum class inflection {
+        infinitive,
+        past_tense,
+        past_participle,
+        ing_form,
+        s_form
+      };
+      
+    private:
+      // Verb
+      const verb* _verb;
+      inflection _inflection = inflection::infinitive;
+    
+    public:
+      verb_token(const class verb& _verb);
+      
+      const class verb& verb() const;
+      
+      verb_token& inflect(inflection infl);
+      
+      bool complete() const;
+      
+      std::string compile() const;
+      
+      token* copy() const;
+  };
+  
+  class utterance_token : public token {
+    private:
+      // Utterance
+      std::list<std::unique_ptr<token>> utterance;
+
+    public:
+      typedef std::list<std::unique_ptr<token>>::iterator iterator;
+      /*class iterator {
+        private:
+          friend class utterance_token;
+          
+          std::list<std::unique_ptr<token>>::iterator it;
+          
+        public:
+          iterator(std::list<std::unique_ptr<token>>::iterator it) : it(it)
+          {
+            
+          }
+          
+          iterator& operator++()
+          {
+            ++it;
+            return *this;
+          }
+          
+          iterator& operator--()
+          {
+            --it;
+            return *this;
+          }
+          
+          bool operator==(const iterator& other) const
+          {
+            return it == other.it;
+          }
+          
+          bool operator!=(const iterator& other) const
+          {
+            return it != other.it;
+          }
+          
+          token& operator*()
+          {
+            return **it;
+          }
+          
+          token& operator->()
+          {
+            return **it;
+          }
+      };*/
+      
+      utterance_token(std::initializer_list<token*> tkns) : token(token::type::utterance)
+      {
+        for (auto tkn : tkns)
+        {
+          utterance.push_back(std::unique_ptr<token>(tkn));
+        }
+      }
+      
+      utterance_token(const utterance_token& other) : token(token::type::utterance)
+      {
+        for (auto& tkn : other.utterance)
+        {
+          utterance.push_back(std::unique_ptr<token>(tkn->copy()));
+        }
+      }
+      
+      utterance_token(utterance_token&& other) : token(token::type::utterance), utterance(std::move(other.utterance))
+      {
+        
+      }
+      
+      utterance_token& operator=(const utterance_token& other)
+      {
+        utterance.clear();
+        
+        for (auto& tkn : other.utterance)
+        {
+          utterance.push_back(std::unique_ptr<token>(tkn->copy()));
+        }
+        
+        return *this;
+      }
+      
+      utterance_token& operator=(utterance_token&& other)
+      {
+        utterance = std::move(other.utterance);
+        
+        return *this;
+      }
+      
+      iterator begin()
+      {
+        return std::begin(utterance);
+      }
+      
+      iterator end()
+      {
+        return std::end(utterance);
+      }
+      
+      void erase(iterator it)
+      {
+        utterance.erase(it);
+      }
+      
+      bool complete() const
+      {
+        return std::all_of(std::begin(utterance), std::end(utterance), [] (const std::unique_ptr<token>& tkn) {
+          return tkn->complete();
+        });
+      }
+      
+      std::string compile() const
+      {
+        std::stringstream result;
+        for (auto& t : utterance)
+        {
+          if (t->complete())
+          {
+            result << t->compile() << " ";
+          } else {
+            return "Could not compile!";
+          }
+        }
+    
+        std::string output = result.str();
+        if (output != "")
+        {
+          output.pop_back();
+        }
+    
+        return output;
+      }
+      
+      token* copy() const
+      {
+        return new utterance_token(*this);
+      }
+  };
+  
+  class fillin_token : public token {
+    private:    
+      // Fillin
+      std::string m_theme;
+      fillin_type m_fillin_type;
+      
+    public:
+      fillin_token(fillin_type ft) : token(token::type::fillin), m_fillin_type(ft)
+      {
+
+      }
+      
+/*      void synrestrs(std::initializer_list<synrestr> ins)
+      {
+        m_synrestrs = std::set<synrestr>(ins);
+      }
+      
+      std::set<synrestr>& synrestrs()
+      {
+        return m_synrestrs;
+      }
+      
+      void selrestrs(std::initializer_list<selrestr> ins)
+      {
+        m_selrestrs = std::set<selrestr>(ins);
+      }
+      
+      std::set<selrestr>& selrestrs()
+      {
+        return m_selrestrs;
+      }*/
+      
+      fillin_token theme(std::string theme)
+      {
+        m_theme = theme;
+        
+        return *this;
+      }
+      
+      std::string& theme()
+      {
+        return m_theme;
+      }
+      
+      fillin_type fillin_type() const
+      {
+        return m_fillin_type;
+      }
+      
+      bool complete() const
+      {
+        return false;
+      }
+      
+      std::string compile() const
+      {
+        return "";
+      }
+      
+      token* copy() const
+      {
+        return new fillin_token(*this);
+      }
+  };
+  
+  class string_token : public token {
+    private:
+      // String
+      std::string str;
+      
+    public:
+      string_token(std::string str) : token(token::type::string), str(str)
+      {
+        
+      }
+      
+      bool complete() const
+      {
+        return true;
+      }
+      
+      std::string compile() const
+      {
+        return str;
+      }
+      
+      token* copy() const
+      {
+        return new string_token(*this);
+      }
+  };
+  
+};
+
+#endif /* end of include guard: TOKEN_H_AD62C505 */