1 | // Copyright David Abrahams 2003. |
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2 | // Distributed under the Boost Software License, Version 1.0. (See |
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3 | // accompanying file LICENSE_1_0.txt or copy at |
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4 | // http://www.boost.org/LICENSE_1_0.txt) |
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5 | #ifndef ITERATOR_TRAITS_DWA200347_HPP |
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6 | # define ITERATOR_TRAITS_DWA200347_HPP |
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7 | |
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8 | # include <boost/detail/iterator.hpp> |
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9 | # include <boost/detail/workaround.hpp> |
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10 | |
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11 | namespace boost { |
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12 | |
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13 | // Unfortunately, g++ 2.95.x chokes when we define a class template |
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14 | // iterator_category which has the same name as its |
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15 | // std::iterator_category() function, probably due in part to the |
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16 | // "std:: is visible globally" hack it uses. Use |
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17 | // BOOST_ITERATOR_CATEGORY to write code that's portable to older |
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18 | // GCCs. |
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19 | |
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20 | # if BOOST_WORKAROUND(__GNUC__, <= 2) |
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21 | # define BOOST_ITERATOR_CATEGORY iterator_category_ |
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22 | # else |
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23 | # define BOOST_ITERATOR_CATEGORY iterator_category |
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24 | # endif |
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25 | |
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26 | |
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27 | template <class Iterator> |
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28 | struct iterator_value |
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29 | { |
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30 | typedef typename boost::detail::iterator_traits<Iterator>::value_type type; |
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31 | }; |
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32 | |
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33 | template <class Iterator> |
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34 | struct iterator_reference |
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35 | { |
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36 | typedef typename boost::detail::iterator_traits<Iterator>::reference type; |
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37 | }; |
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38 | |
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39 | |
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40 | template <class Iterator> |
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41 | struct iterator_pointer |
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42 | { |
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43 | typedef typename boost::detail::iterator_traits<Iterator>::pointer type; |
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44 | }; |
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45 | |
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46 | template <class Iterator> |
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47 | struct iterator_difference |
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48 | { |
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49 | typedef typename boost::detail::iterator_traits<Iterator>::difference_type type; |
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50 | }; |
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51 | |
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52 | template <class Iterator> |
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53 | struct BOOST_ITERATOR_CATEGORY |
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54 | { |
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55 | typedef typename boost::detail::iterator_traits<Iterator>::iterator_category type; |
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56 | }; |
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57 | |
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58 | # if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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59 | template <> |
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60 | struct iterator_value<int> |
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61 | { |
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62 | typedef void type; |
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63 | }; |
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64 | |
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65 | template <> |
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66 | struct iterator_reference<int> |
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67 | { |
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68 | typedef void type; |
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69 | }; |
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70 | |
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71 | template <> |
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72 | struct iterator_pointer<int> |
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73 | { |
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74 | typedef void type; |
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75 | }; |
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76 | |
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77 | template <> |
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78 | struct iterator_difference<int> |
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79 | { |
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80 | typedef void type; |
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81 | }; |
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82 | |
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83 | template <> |
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84 | struct BOOST_ITERATOR_CATEGORY<int> |
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85 | { |
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86 | typedef void type; |
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87 | }; |
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88 | # endif |
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89 | |
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90 | } // namespace boost::iterator |
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91 | |
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92 | #endif // ITERATOR_TRAITS_DWA200347_HPP |
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