Instigate Open Source Documentation

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src/stl/_random_access_iterator.hpp

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#ifndef _INSTIGATE_OPEN_SOURCE_INTERNAL_HEADER_IN_CONCEPT
#error This is an internal header file used to implement Instigate STL.\
        It should never be included directly by a program.
#endif

#ifndef INSTIGATE_STL_RANDOM_ACCESS_ITERATOR_HPP
#define INSTIGATE_STL_RANDOM_ACCESS_ITERATOR_HPP

// Headers from this project
#include "_bidirectional_iterator.hpp"
#include "iterator_interface.hpp"

// Headers from other project
#include <generic/base.hpp>
#include <generic/_less_than_comparable.hpp>

// Headers from standard libraries
#include <iterator>

// Forward declaration
namespace instigate { 
        namespace stl {
                namespace random_access_iterator {
                        struct tag;
                        template <typename T> struct interface;
                        template <typename T> struct requirements;

                }
        }
} 


struct instigate::stl::random_access_iterator::tag 
        : instigate::stl::bidirectional_iterator::tag
        , instigate::generic::less_than_comparable::tag
{
};

template <typename T>
struct instigate::stl::random_access_iterator::interface 
        : instigate::stl::bidirectional_iterator::interface<T>
        , instigate::generic::less_than_comparable::interface<T>
{
        typedef typename instigate::stl::interface<T>::difference_type 
                difference_type;
        
        static void advance(T& a, const difference_type& n)
        {
                instigate::stl::interface<T>::advance(a, n);
        }       
        static difference_type distance(const T& a, const T& b)
        {
                return instigate::stl::interface<T>::distance(a, b);
        }
}; 

template <typename T>
struct instigate::stl::random_access_iterator::requirements 
        : instigate::stl::bidirectional_iterator::requirements<T>
        , instigate::generic::less_than_comparable::requirements<T>
{
        
        typedef typename instigate::stl::random_access_iterator::interface<T>
		::difference_type difference_type;
        static void require_distance(T& a , T& b)
        {
                instigate::stl::random_access_iterator::interface<T>
                        ::distance(a, b);               
        }
       
        static void require_advance(T& a , difference_type n)
        {
                instigate::stl::random_access_iterator::interface<T>
                        ::advance(a, n);                
        }

public:
        requirements()
        {
                (void)require_advance;
                (void)require_distance;
        }
};

// vim:et:tabstop=8:shiftwidth=8:cindent:fo=croq:textwidth=80:

#endif 

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