boost/regex/v4/iterator_traits.hpp

   1 /*
   2  *
   3  * Copyright (c) 1998-2002
   4  * John Maddock
   5  *
   6  * Use, modification and distribution are subject to the
   7  * Boost Software License, Version 1.0. (See accompanying file
   8  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9  *
  10  */
  11
  12  /*
  13   *   LOCATION:    see http://www.boost.org for most recent version.
  14   *   FILE         iterator_traits.cpp
  15   *   VERSION      see <boost/version.hpp>
  16   *   DESCRIPTION: Declares iterator traits workarounds.
  17   */
  18
  19 #ifndef BOOST_REGEX_V4_ITERATOR_TRAITS_HPP
  20 #define BOOST_REGEX_V4_ITERATOR_TRAITS_HPP
  21
  22 #ifdef BOOST_MSVC
  23 #pragma warning(push)
  24 #pragma warning(disable: 4103)
  25 #endif
  26 #ifdef BOOST_HAS_ABI_HEADERS
  27 #  include BOOST_ABI_PREFIX
  28 #endif
  29 #ifdef BOOST_MSVC
  30 #pragma warning(pop)
  31 #endif
  32
  33 namespace boost{
  34 namespace re_detail{
  35
  36 #if defined(BOOST_NO_STD_ITERATOR_TRAITS) || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
  37
  38 template <class T>
  39 struct regex_iterator_traits
  40 {
  41   typedef typename T::iterator_category iterator_category;
  42   typedef typename T::value_type        value_type;
  43 #if !defined(BOOST_NO_STD_ITERATOR)
  44   typedef typename T::difference_type   difference_type;
  45   typedef typename T::pointer           pointer;
  46   typedef typename T::reference         reference;
  47 #else
  48   typedef std::ptrdiff_t                difference_type;
  49   typedef value_type*                   pointer;
  50   typedef value_type&                   reference;
  51 #endif
  52 };
  53
  54 template <class T>
  55 struct pointer_iterator_traits
  56 {
  57    typedef std::ptrdiff_t difference_type;
  58    typedef T value_type;
  59    typedef T* pointer;
  60    typedef T& reference;
  61    typedef std::random_access_iterator_tag iterator_category;
  62 };
  63 template <class T>
  64 struct const_pointer_iterator_traits
  65 {
  66    typedef std::ptrdiff_t difference_type;
  67    typedef T value_type;
  68    typedef const T* pointer;
  69    typedef const T& reference;
  70    typedef std::random_access_iterator_tag iterator_category;
  71 };
  72
  73 template<>
  74 struct regex_iterator_traits<char*> : pointer_iterator_traits<char>{};
  75 template<>
  76 struct regex_iterator_traits<const char*> : const_pointer_iterator_traits<char>{};
  77 template<>
  78 struct regex_iterator_traits<wchar_t*> : pointer_iterator_traits<wchar_t>{};
  79 template<>
  80 struct regex_iterator_traits<const wchar_t*> : const_pointer_iterator_traits<wchar_t>{};
  81 //
  82 // the follwoing are needed for ICU support:
  83 //
  84 template<>
  85 struct regex_iterator_traits<unsigned char*> : pointer_iterator_traits<char>{};
  86 template<>
  87 struct regex_iterator_traits<const unsigned char*> : const_pointer_iterator_traits<char>{};
  88 template<>
  89 struct regex_iterator_traits<int*> : pointer_iterator_traits<int>{};
  90 template<>
  91 struct regex_iterator_traits<const int*> : const_pointer_iterator_traits<int>{};
  92
  93 #ifdef BOOST_REGEX_HAS_OTHER_WCHAR_T
  94 template<>
  95 struct regex_iterator_traits<unsigned short*> : pointer_iterator_traits<unsigned short>{};
  96 template<>
  97 struct regex_iterator_traits<const unsigned short*> : const_pointer_iterator_traits<unsigned short>{};
  98 #endif
  99
 100 #if defined(__SGI_STL_PORT) && defined(__STL_DEBUG)
 101 template<>
 102 struct regex_iterator_traits<std::string::iterator> : pointer_iterator_traits<char>{};
 103 template<>
 104 struct regex_iterator_traits<std::string::const_iterator> : const_pointer_iterator_traits<char>{};
 105 #ifndef BOOST_NO_STD_WSTRING
 106 template<>
 107 struct regex_iterator_traits<std::wstring::iterator> : pointer_iterator_traits<wchar_t>{};
 108 template<>
 109 struct regex_iterator_traits<std::wstring::const_iterator> : const_pointer_iterator_traits<wchar_t>{};
 110 #endif // BOOST_NO_WSTRING
 111 #endif // stport
 112
 113 #else
 114
 115 template <class T>
 116 struct regex_iterator_traits : public std::iterator_traits<T> {};
 117
 118 #endif
 119
 120 } // namespace re_detail
 121 } // namespace boost
 122
 123 #ifdef BOOST_MSVC
 124 #pragma warning(push)
 125 #pragma warning(disable: 4103)
 126 #endif
 127 #ifdef BOOST_HAS_ABI_HEADERS
 128 #  include BOOST_ABI_SUFFIX
 129 #endif
 130 #ifdef BOOST_MSVC
 131 #pragma warning(pop)
 132 #endif
 133
 134 #endif
 135