// -*- c++ -*-

 #ifndef HUGO_MAPSKELETON_H

 #define HUGO_MAPSKELETON_H

 namespace hugo {

   ///Readable map skeleton

   template<typename K, typename T>

   class ReadMapSkeleton

   {

   public:

     /// Map value type.

     typedef T ValueType;

     /// Map key type.

     typedef K KeyType;

     ///Default constructor.

     ReadMapSkeleton() {}

     ///Reads an element of the map.

     ValueType operator[](const KeyType &i) const {return ValueType();}

   };

   ///Writeable map skeleton

   template<typename K, typename T>

   class WriteMapSkeleton 

   {

   public:

     /// Map value type.

     typedef T ValueType;

     /// Map key type.

     typedef K KeyType;

     ///Default constructor.

     WriteMapSkeleton() {}

     ///'Fill with' constructor.

     WriteMapSkeleton(const ValueType &t) {}

     ///Write an element of a map.

     void set(const KeyType &i,const ValueType &t) {}

   };

   ///Read/Write map skeleton.

   template<typename K, typename T>

   class ReadWriteMapSkeleton : public ReadMapSkeleton<K,T>,

 			       public WriteMapSkeleton<K,T>

   {

   public:

     ///Default constructor.

     ReadWriteMapSkeleton() : ReadMapSkeleton(), WriteMapSkeleton() {}

     ///'Fill with' constructor.

     ReadWriteMap(const ValueType &t) :ReadMapSkeleton(), WriteMapSkeleton(t) {}

   };

   ///Dereferable map skeleton

   template<typename K, typename T>

   class MemoryMapSkeleton : public ReadWriteMapSkeleton<K,T>

   {

   public:

     /// Map value type.

     typedef T ValueType;

     /// Map key type.

     typedef K KeyType;

     ///Default constructor.

     ReferenceMapSkeleton() : ReadWriteMapSkeleton() {}

     ///'Fill with' constructor.

     ReferenceMapSkeleton(const ValueType &t) : ReadWriteMapSkeleton(t) {}    

     ///Give a reference to the value belonging to a key.

     ValueType &operator[](const KeyType &i) {return *(ValueType*)0;} 

     ///Give a const reference to the value belonging to a key.

     const ValueType &operator[](const KeyType &i) const {return *(T*)0;}

   };

 }

 #endif // HUGO_MAPSKELETON_H