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src/stl/iterator_interface.hpp

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#ifndef INSTIGATE_STL_ITERATOR_INTERFACE_HPP
#define INSTIGATE_STL_ITERATOR_INTERFACE_HPP

// headers from this project
#include "concept.hpp"

// headers from this project

// headers from standard library
#include <iterator>

// forward declarations
namespace instigate {
        namespace stl {
                template <typename T> 
                struct interface;
                template <typename T> 
                struct interface<std::ostream_iterator<T> >; 
        }
}

template <typename T>
struct instigate::stl::interface
{       
        typedef typename std::iterator_traits<T>::iterator_category 
                                                        iterator_category;

        typedef typename std::iterator_traits<T>::value_type value_type;
        
        typedef typename std::iterator_traits<T>::difference_type 
                                                        difference_type;
        static void increment(T& a)
        {
                ++a;
        }
        
        static void decrement(T& a)
        {
                --a;
        }
        
        static const value_type& const_dereference(const T& a)
        {
                return *a;
        }
        
        static void advance(T& a, const difference_type& n)
        {
                a = a + n;              
        }       
        
        static difference_type distance(const T& a, const T& b)
        {
                return b - a;
        }

        static void dereference_assign(T a, const value_type& b)
        {
                *a = b;
        }
        
        static value_type& dereference(const T& a)
        {
                return *a;
        }
};

template<typename T>
struct instigate::stl::interface<std::ostream_iterator<T> > 
{
        typedef T value_type;

        static void dereference_assign(std::ostream_iterator<T> a, 
                const value_type&  b)
        {
                *a = b;
        }
};

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#endif // INSTIGATE_STL_ITERATOR_INTERFACE_HPP

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