// -*- c++ -*-

 #ifndef HUGO_MAPSKELETON_H

 #define HUGO_MAPSKELETON_H

 ///\file

 ///\brief Map concepts checking classes for testing and documenting.

 namespace hugo {

   /// The namespace of HUGOlib concepts and concept checking classes

   namespace skeleton {

     /// Readable map concept

     template<typename K, typename T>

     class ReadMap

     {

     public:

       /// Map's key type.

       typedef K KeyType;    

       /// Map's value type. (The type of objects associated with the keys).

       typedef T ValueType;

       /// Returns the value associated with a key.

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

       ///Default constructor

       ReadMap() {}

     };

     /// Writable map concept

     template<typename K, typename T>

     class WriteMap

     {

     public:

       /// Map's key type.

       typedef K KeyType;    

       /// Map's value type. (The type of objects associated with the keys).

       typedef T ValueType;

       /// Sets the value associated with a key.

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

       ///Default constructor

       WriteMap() {}

     };

     ///Read/Writeable map concept

     template<typename K, typename T>

     class ReadWriteMap : public ReadMap<K,T>,

 			    public WriteMap<K,T>

     {

     public:

       /// Map's key type.

       typedef K KeyType;    

       /// Map's value type. (The type of objects associated with the keys).

       typedef T ValueType;

       /// Returns the value associated with a key.

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

       /// Sets the value associated with a key.

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

       ///Default constructor

       ReadWriteMap() {}

     };

     ///Dereferable map concept

     template<typename K, typename T>

     class ReferenceMap : public ReadWriteMap<K,T>

     {

     public:

       /// Map's key type.

       typedef K KeyType;    

       /// Map's value type. (The type of objects associated with the keys).

       typedef T ValueType;

     protected:

       ValueType tmp;

     public:

       typedef ValueType& ReferenceType;

       /// Map's const reference type.

       typedef const ValueType& ConstReferenceType;

       ///Returns a reference to the value associated to a key.

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

       ///Returns a const reference to the value associated to a key.

       ConstReferenceType operator[](const KeyType &i) const

       { return tmp; }

       /// Sets the value associated with a key.

       void set(const KeyType &k,const ValueType &t) { operator[](k)=t; }

       ///Default constructor

       ReferenceMap() {}

     };

   } //namespace skeleton

 } //namespace hugo

 #endif // HUGO_MAPSKELETON_H