1 // Copyright David Abrahams 2003.

     2 // Distributed under the Boost Software License, Version 1.0. (See

     3 // accompanying file LICENSE_1_0.txt or copy at

     4 // http://www.boost.org/LICENSE_1_0.txt)

     5 #ifndef ITERATOR_TRAITS_DWA200347_HPP

     6 # define ITERATOR_TRAITS_DWA200347_HPP

     7 

     8 # include <boost/detail/iterator.hpp>

     9 # include <boost/detail/workaround.hpp>

    10 

    11 namespace boost { 

    12 

    13 // Unfortunately, g++ 2.95.x chokes when we define a class template

    14 // iterator_category which has the same name as its

    15 // std::iterator_category() function, probably due in part to the

    16 // "std:: is visible globally" hack it uses.  Use

    17 // BOOST_ITERATOR_CATEGORY to write code that's portable to older

    18 // GCCs.

    19 

    20 # if BOOST_WORKAROUND(__GNUC__, <= 2)

    21 #  define BOOST_ITERATOR_CATEGORY iterator_category_

    22 # else

    23 #  define BOOST_ITERATOR_CATEGORY iterator_category

    24 # endif

    25 

    26 

    27 template <class Iterator>

    28 struct iterator_value

    29 {

    30     typedef typename boost::detail::iterator_traits<Iterator>::value_type type;

    31 };

    32   

    33 template <class Iterator>

    34 struct iterator_reference

    35 {

    36     typedef typename boost::detail::iterator_traits<Iterator>::reference type;

    37 };

    38   

    39   

    40 template <class Iterator>

    41 struct iterator_pointer

    42 {

    43     typedef typename boost::detail::iterator_traits<Iterator>::pointer type;

    44 };

    45   

    46 template <class Iterator>

    47 struct iterator_difference

    48 {

    49     typedef typename boost::detail::iterator_traits<Iterator>::difference_type type;

    50 };

    51 

    52 template <class Iterator>

    53 struct BOOST_ITERATOR_CATEGORY

    54 {

    55     typedef typename boost::detail::iterator_traits<Iterator>::iterator_category type;

    56 };

    57 

    58 # if BOOST_WORKAROUND(BOOST_MSVC, < 1300)

    59 template <>

    60 struct iterator_value<int>

    61 {

    62     typedef void type;

    63 };

    64   

    65 template <>

    66 struct iterator_reference<int>

    67 {

    68     typedef void type;

    69 };

    70 

    71 template <>

    72 struct iterator_pointer<int>

    73 {

    74     typedef void type;

    75 };

    76   

    77 template <>

    78 struct iterator_difference<int>

    79 {

    80     typedef void type;

    81 };

    82   

    83 template <>

    84 struct BOOST_ITERATOR_CATEGORY<int>

    85 {

    86     typedef void type;

    87 };

    88 # endif

    89 

    90 } // namespace boost::iterator

    91 

    92 #endif // ITERATOR_TRAITS_DWA200347_HPP