// -*- 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