ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/regex/v4/iterator_traits.hpp b/include/ndnboost/regex/v4/iterator_traits.hpp
new file mode 100644
index 0000000..6795b35
--- /dev/null
+++ b/include/ndnboost/regex/v4/iterator_traits.hpp
@@ -0,0 +1,135 @@
+/*
+ *
+ * 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 <ndnboost/version.hpp>
+ * DESCRIPTION: Declares iterator traits workarounds.
+ */
+
+#ifndef NDNBOOST_REGEX_V4_ITERATOR_TRAITS_HPP
+#define NDNBOOST_REGEX_V4_ITERATOR_TRAITS_HPP
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable: 4103)
+#endif
+#ifdef NDNBOOST_HAS_ABI_HEADERS
+# include NDNBOOST_ABI_PREFIX
+#endif
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+
+namespace ndnboost{
+namespace re_detail{
+
+#if defined(NDNBOOST_NO_STD_ITERATOR_TRAITS) || defined(NDNBOOST_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(NDNBOOST_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 NDNBOOST_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 NDNBOOST_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 // NDNBOOST_NO_WSTRING
+#endif // stport
+
+#else
+
+template <class T>
+struct regex_iterator_traits : public std::iterator_traits<T> {};
+
+#endif
+
+} // namespace re_detail
+} // namespace ndnboost
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable: 4103)
+#endif
+#ifdef NDNBOOST_HAS_ABI_HEADERS
+# include NDNBOOST_ABI_SUFFIX
+#endif
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+
+#endif
+