/*

 *

 * Copyright (c) 1998-2002

 * John Maddock

 *

 * Use, modification and distribution are subject to the 

 * Boost Software License, Version 1.0. (See accompanying file 

 * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

 *

 */

 /*

  *   LOCATION:    see http://www.boost.org for most recent version.

  *   FILE         iterator_traits.cpp

  *   VERSION      see <boost/version.hpp>

  *   DESCRIPTION: Declares iterator traits workarounds.

  */

#ifndef BOOST_REGEX_V4_ITERATOR_TRAITS_HPP

#define BOOST_REGEX_V4_ITERATOR_TRAITS_HPP

#ifdef BOOST_MSVC

#pragma warning(push)

#pragma warning(disable: 4103)

#endif

#ifdef BOOST_HAS_ABI_HEADERS

#  include BOOST_ABI_PREFIX

#endif

#ifdef BOOST_MSVC

#pragma warning(pop)

#endif

namespace boost{

namespace re_detail{

#if defined(BOOST_NO_STD_ITERATOR_TRAITS) || defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)

template <class T>

struct regex_iterator_traits 

{

  typedef typename T::iterator_category iterator_category;

  typedef typename T::value_type        value_type;

#if !defined(BOOST_NO_STD_ITERATOR)

  typedef typename T::difference_type   difference_type;

  typedef typename T::pointer           pointer;

  typedef typename T::reference         reference;

#else

  typedef std::ptrdiff_t                difference_type;

  typedef value_type*                   pointer;

  typedef value_type&                   reference;

#endif

};

template <class T>

struct pointer_iterator_traits

{

   typedef std::ptrdiff_t difference_type;

   typedef T value_type;

   typedef T* pointer;

   typedef T& reference;

   typedef std::random_access_iterator_tag iterator_category;

};

template <class T>

struct const_pointer_iterator_traits

{

   typedef std::ptrdiff_t difference_type;

   typedef T value_type;

   typedef const T* pointer;

   typedef const T& reference;

   typedef std::random_access_iterator_tag iterator_category;

};

template<>

struct regex_iterator_traits<char*> : pointer_iterator_traits<char>{};

template<>

struct regex_iterator_traits<const char*> : const_pointer_iterator_traits<char>{};

template<>

struct regex_iterator_traits<wchar_t*> : pointer_iterator_traits<wchar_t>{};

template<>

struct regex_iterator_traits<const wchar_t*> : const_pointer_iterator_traits<wchar_t>{};

//

// the follwoing are needed for ICU support:

//

template<>

struct regex_iterator_traits<unsigned char*> : pointer_iterator_traits<char>{};

template<>

struct regex_iterator_traits<const unsigned char*> : const_pointer_iterator_traits<char>{};

template<>

struct regex_iterator_traits<int*> : pointer_iterator_traits<int>{};

template<>

struct regex_iterator_traits<const int*> : const_pointer_iterator_traits<int>{};

#ifdef BOOST_REGEX_HAS_OTHER_WCHAR_T

template<>

struct regex_iterator_traits<unsigned short*> : pointer_iterator_traits<unsigned short>{};

template<>

struct regex_iterator_traits<const unsigned short*> : const_pointer_iterator_traits<unsigned short>{};

#endif

#if defined(__SGI_STL_PORT) && defined(__STL_DEBUG)

template<>

struct regex_iterator_traits<std::string::iterator> : pointer_iterator_traits<char>{};

template<>

struct regex_iterator_traits<std::string::const_iterator> : const_pointer_iterator_traits<char>{};

#ifndef BOOST_NO_STD_WSTRING

template<>

struct regex_iterator_traits<std::wstring::iterator> : pointer_iterator_traits<wchar_t>{};

template<>

struct regex_iterator_traits<std::wstring::const_iterator> : const_pointer_iterator_traits<wchar_t>{};

#endif // BOOST_NO_WSTRING

#endif // stport

#else

template <class T>

struct regex_iterator_traits : public std::iterator_traits<T> {};

#endif

} // namespace re_detail

} // namespace boost

#ifdef BOOST_MSVC

#pragma warning(push)

#pragma warning(disable: 4103)

#endif

#ifdef BOOST_HAS_ABI_HEADERS

#  include BOOST_ABI_SUFFIX

#endif

#ifdef BOOST_MSVC

#pragma warning(pop)

#endif

#endif