ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/regex/v4/cpp_regex_traits.hpp b/include/ndnboost/regex/v4/cpp_regex_traits.hpp
new file mode 100644
index 0000000..5ec8657
--- /dev/null
+++ b/include/ndnboost/regex/v4/cpp_regex_traits.hpp
@@ -0,0 +1,1099 @@
+/*
+ *
+ * Copyright (c) 2004 John Maddock
+ * Copyright 2011 Garmin Ltd. or its subsidiaries
+ *
+ * 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         cpp_regex_traits.hpp
+  *   VERSION      see <ndnboost/version.hpp>
+  *   DESCRIPTION: Declares regular expression traits class cpp_regex_traits.
+  */
+
+#ifndef NDNBOOST_CPP_REGEX_TRAITS_HPP_INCLUDED
+#define NDNBOOST_CPP_REGEX_TRAITS_HPP_INCLUDED
+
+#include <ndnboost/config.hpp>
+#include <ndnboost/integer.hpp>
+
+#ifndef NDNBOOST_NO_STD_LOCALE
+
+#ifndef NDNBOOST_RE_PAT_EXCEPT_HPP
+#include <ndnboost/regex/pattern_except.hpp>
+#endif
+#ifndef NDNBOOST_REGEX_TRAITS_DEFAULTS_HPP_INCLUDED
+#include <ndnboost/regex/v4/regex_traits_defaults.hpp>
+#endif
+#ifdef NDNBOOST_HAS_THREADS
+#include <ndnboost/regex/pending/static_mutex.hpp>
+#endif
+#ifndef NDNBOOST_REGEX_PRIMARY_TRANSFORM
+#include <ndnboost/regex/v4/primary_transform.hpp>
+#endif
+#ifndef NDNBOOST_REGEX_OBJECT_CACHE_HPP
+#include <ndnboost/regex/pending/object_cache.hpp>
+#endif
+
+#include <istream>
+#include <ios>
+#include <climits>
+
+#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
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable:4786 4251)
+#endif
+
+namespace ndnboost{ 
+
+//
+// forward declaration is needed by some compilers:
+//
+template <class charT>
+class cpp_regex_traits;
+   
+namespace re_detail{
+
+//
+// class parser_buf:
+// acts as a stream buffer which wraps around a pair of pointers:
+//
+template <class charT,
+          class traits = ::std::char_traits<charT> >
+class parser_buf : public ::std::basic_streambuf<charT, traits>
+{
+   typedef ::std::basic_streambuf<charT, traits> base_type;
+   typedef typename base_type::int_type int_type;
+   typedef typename base_type::char_type char_type;
+   typedef typename base_type::pos_type pos_type;
+   typedef ::std::streamsize streamsize;
+   typedef typename base_type::off_type off_type;
+public:
+   parser_buf() : base_type() { setbuf(0, 0); }
+   const charT* getnext() { return this->gptr(); }
+protected:
+   std::basic_streambuf<charT, traits>* setbuf(char_type* s, streamsize n);
+   typename parser_buf<charT, traits>::pos_type seekpos(pos_type sp, ::std::ios_base::openmode which);
+   typename parser_buf<charT, traits>::pos_type seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which);
+private:
+   parser_buf& operator=(const parser_buf&);
+   parser_buf(const parser_buf&);
+};
+
+template<class charT, class traits>
+std::basic_streambuf<charT, traits>*
+parser_buf<charT, traits>::setbuf(char_type* s, streamsize n)
+{
+   this->setg(s, s, s + n);
+   return this;
+}
+
+template<class charT, class traits>
+typename parser_buf<charT, traits>::pos_type
+parser_buf<charT, traits>::seekoff(off_type off, ::std::ios_base::seekdir way, ::std::ios_base::openmode which)
+{
+   typedef typename ndnboost::int_t<sizeof(way) * CHAR_BIT>::least cast_type;
+
+   if(which & ::std::ios_base::out)
+      return pos_type(off_type(-1));
+   std::ptrdiff_t size = this->egptr() - this->eback();
+   std::ptrdiff_t pos = this->gptr() - this->eback();
+   charT* g = this->eback();
+   switch(static_cast<cast_type>(way))
+   {
+   case ::std::ios_base::beg:
+      if((off < 0) || (off > size))
+         return pos_type(off_type(-1));
+      else
+         this->setg(g, g + off, g + size);
+      break;
+   case ::std::ios_base::end:
+      if((off < 0) || (off > size))
+         return pos_type(off_type(-1));
+      else
+         this->setg(g, g + size - off, g + size);
+      break;
+   case ::std::ios_base::cur:
+   {
+      std::ptrdiff_t newpos = static_cast<std::ptrdiff_t>(pos + off);
+      if((newpos < 0) || (newpos > size))
+         return pos_type(off_type(-1));
+      else
+         this->setg(g, g + newpos, g + size);
+      break;
+   }
+   default: ;
+   }
+#ifdef NDNBOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable:4244)
+#endif
+   return static_cast<pos_type>(this->gptr() - this->eback());
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+}
+
+template<class charT, class traits>
+typename parser_buf<charT, traits>::pos_type
+parser_buf<charT, traits>::seekpos(pos_type sp, ::std::ios_base::openmode which)
+{
+   if(which & ::std::ios_base::out)
+      return pos_type(off_type(-1));
+   off_type size = static_cast<off_type>(this->egptr() - this->eback());
+   charT* g = this->eback();
+   if(off_type(sp) <= size)
+   {
+      this->setg(g, g + off_type(sp), g + size);
+   }
+   return pos_type(off_type(-1));
+}
+
+//
+// class cpp_regex_traits_base:
+// acts as a container for locale and the facets we are using.
+//
+template <class charT>
+struct cpp_regex_traits_base
+{
+   cpp_regex_traits_base(const std::locale& l)
+   { imbue(l); }
+   std::locale imbue(const std::locale& l);
+
+   std::locale m_locale;
+   std::ctype<charT> const* m_pctype;
+#ifndef NDNBOOST_NO_STD_MESSAGES
+   std::messages<charT> const* m_pmessages;
+#endif
+   std::collate<charT> const* m_pcollate;
+
+   bool operator<(const cpp_regex_traits_base& b)const
+   {
+      if(m_pctype == b.m_pctype)
+      {
+#ifndef NDNBOOST_NO_STD_MESSAGES
+         if(m_pmessages == b.m_pmessages)
+         {
+            return m_pcollate < b.m_pcollate;
+         }
+         return m_pmessages < b.m_pmessages;
+#else
+         return m_pcollate < b.m_pcollate;
+#endif
+      }
+      return m_pctype < b.m_pctype;
+   }
+   bool operator==(const cpp_regex_traits_base& b)const
+   {
+      return (m_pctype == b.m_pctype) 
+#ifndef NDNBOOST_NO_STD_MESSAGES
+         && (m_pmessages == b.m_pmessages) 
+#endif
+         && (m_pcollate == b.m_pcollate);
+   }
+};
+
+template <class charT>
+std::locale cpp_regex_traits_base<charT>::imbue(const std::locale& l)
+{
+   std::locale result(m_locale);
+   m_locale = l;
+   m_pctype = &NDNBOOST_USE_FACET(std::ctype<charT>, l);
+#ifndef NDNBOOST_NO_STD_MESSAGES
+   m_pmessages = NDNBOOST_HAS_FACET(std::messages<charT>, l) ? &NDNBOOST_USE_FACET(std::messages<charT>, l) : 0;
+#endif
+   m_pcollate = &NDNBOOST_USE_FACET(std::collate<charT>, l);
+   return result;
+}
+
+//
+// class cpp_regex_traits_char_layer:
+// implements methods that require specialisation for narrow characters:
+//
+template <class charT>
+class cpp_regex_traits_char_layer : public cpp_regex_traits_base<charT>
+{
+   typedef std::basic_string<charT> string_type;
+   typedef std::map<charT, regex_constants::syntax_type> map_type;
+   typedef typename map_type::const_iterator map_iterator_type;
+public:
+   cpp_regex_traits_char_layer(const std::locale& l)
+      : cpp_regex_traits_base<charT>(l)
+   {
+      init();
+   }
+   cpp_regex_traits_char_layer(const cpp_regex_traits_base<charT>& b)
+      : cpp_regex_traits_base<charT>(b)
+   {
+      init();
+   }
+   void init();
+
+   regex_constants::syntax_type syntax_type(charT c)const
+   {
+      map_iterator_type i = m_char_map.find(c);
+      return ((i == m_char_map.end()) ? 0 : i->second);
+   }
+   regex_constants::escape_syntax_type escape_syntax_type(charT c) const
+   {
+      map_iterator_type i = m_char_map.find(c);
+      if(i == m_char_map.end())
+      {
+         if(this->m_pctype->is(std::ctype_base::lower, c)) return regex_constants::escape_type_class;
+         if(this->m_pctype->is(std::ctype_base::upper, c)) return regex_constants::escape_type_not_class;
+         return 0;
+      }
+      return i->second;
+   }
+
+private:
+   string_type get_default_message(regex_constants::syntax_type);
+   // TODO: use a hash table when available!
+   map_type m_char_map;
+};
+
+template <class charT>
+void cpp_regex_traits_char_layer<charT>::init()
+{
+   // we need to start by initialising our syntax map so we know which
+   // character is used for which purpose:
+#ifndef NDNBOOST_NO_STD_MESSAGES
+#ifndef __IBMCPP__
+   typename std::messages<charT>::catalog cat = static_cast<std::messages<char>::catalog>(-1);
+#else
+   typename std::messages<charT>::catalog cat = reinterpret_cast<std::messages<char>::catalog>(-1);
+#endif
+   std::string cat_name(cpp_regex_traits<charT>::get_catalog_name());
+   if(cat_name.size() && (this->m_pmessages != 0))
+   {
+      cat = this->m_pmessages->open(
+         cat_name, 
+         this->m_locale);
+      if((int)cat < 0)
+      {
+         std::string m("Unable to open message catalog: ");
+         std::runtime_error err(m + cat_name);
+         ndnboost::re_detail::raise_runtime_error(err);
+      }
+   }
+   //
+   // if we have a valid catalog then load our messages:
+   //
+   if((int)cat >= 0)
+   {
+#ifndef NDNBOOST_NO_EXCEPTIONS
+      try{
+#endif
+         for(regex_constants::syntax_type i = 1; i < regex_constants::syntax_max; ++i)
+         {
+            string_type mss = this->m_pmessages->get(cat, 0, i, get_default_message(i));
+            for(typename string_type::size_type j = 0; j < mss.size(); ++j)
+            {
+               m_char_map[mss[j]] = i;
+            }
+         }
+         this->m_pmessages->close(cat);
+#ifndef NDNBOOST_NO_EXCEPTIONS
+      }
+      catch(...)
+      {
+         if(this->m_pmessages)
+            this->m_pmessages->close(cat);
+         throw;
+      }
+#endif
+   }
+   else
+   {
+#endif
+      for(regex_constants::syntax_type i = 1; i < regex_constants::syntax_max; ++i)
+      {
+         const char* ptr = get_default_syntax(i);
+         while(ptr && *ptr)
+         {
+            m_char_map[this->m_pctype->widen(*ptr)] = i;
+            ++ptr;
+         }
+      }
+#ifndef NDNBOOST_NO_STD_MESSAGES
+   }
+#endif
+}
+
+template <class charT>
+typename cpp_regex_traits_char_layer<charT>::string_type 
+   cpp_regex_traits_char_layer<charT>::get_default_message(regex_constants::syntax_type i)
+{
+   const char* ptr = get_default_syntax(i);
+   string_type result;
+   while(ptr && *ptr)
+   {
+      result.append(1, this->m_pctype->widen(*ptr));
+      ++ptr;
+   }
+   return result;
+}
+
+//
+// specialised version for narrow characters:
+//
+template <>
+class NDNBOOST_REGEX_DECL cpp_regex_traits_char_layer<char> : public cpp_regex_traits_base<char>
+{
+   typedef std::string string_type;
+public:
+   cpp_regex_traits_char_layer(const std::locale& l)
+   : cpp_regex_traits_base<char>(l)
+   {
+      init();
+   }
+   cpp_regex_traits_char_layer(const cpp_regex_traits_base<char>& l)
+   : cpp_regex_traits_base<char>(l)
+   {
+      init();
+   }
+
+   regex_constants::syntax_type syntax_type(char c)const
+   {
+      return m_char_map[static_cast<unsigned char>(c)];
+   }
+   regex_constants::escape_syntax_type escape_syntax_type(char c) const
+   {
+      return m_char_map[static_cast<unsigned char>(c)];
+   }
+
+private:
+   regex_constants::syntax_type m_char_map[1u << CHAR_BIT];
+   void init();
+};
+
+#ifdef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+enum
+{
+   char_class_space=1<<0, 
+   char_class_print=1<<1, 
+   char_class_cntrl=1<<2, 
+   char_class_upper=1<<3, 
+   char_class_lower=1<<4,
+   char_class_alpha=1<<5, 
+   char_class_digit=1<<6, 
+   char_class_punct=1<<7, 
+   char_class_xdigit=1<<8,
+   char_class_alnum=char_class_alpha|char_class_digit, 
+   char_class_graph=char_class_alnum|char_class_punct,
+   char_class_blank=1<<9,
+   char_class_word=1<<10,
+   char_class_unicode=1<<11,
+   char_class_horizontal_space=1<<12,
+   char_class_vertical_space=1<<13
+};
+
+#endif
+
+//
+// class cpp_regex_traits_implementation:
+// provides pimpl implementation for cpp_regex_traits.
+//
+template <class charT>
+class cpp_regex_traits_implementation : public cpp_regex_traits_char_layer<charT>
+{
+public:
+   typedef typename cpp_regex_traits<charT>::char_class_type char_class_type;
+   typedef typename std::ctype<charT>::mask                  native_mask_type;
+#ifndef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+   NDNBOOST_STATIC_CONSTANT(char_class_type, mask_blank = 1u << 24);
+   NDNBOOST_STATIC_CONSTANT(char_class_type, mask_word = 1u << 25);
+   NDNBOOST_STATIC_CONSTANT(char_class_type, mask_unicode = 1u << 26);
+   NDNBOOST_STATIC_CONSTANT(char_class_type, mask_horizontal = 1u << 27);
+   NDNBOOST_STATIC_CONSTANT(char_class_type, mask_vertical = 1u << 28);
+#endif
+
+   typedef std::basic_string<charT> string_type;
+   typedef charT char_type;
+   //cpp_regex_traits_implementation();
+   cpp_regex_traits_implementation(const std::locale& l)
+      : cpp_regex_traits_char_layer<charT>(l)
+   {
+      init();
+   }
+   cpp_regex_traits_implementation(const cpp_regex_traits_base<charT>& l)
+      : cpp_regex_traits_char_layer<charT>(l)
+   {
+      init();
+   }
+   std::string error_string(regex_constants::error_type n) const
+   {
+      if(!m_error_strings.empty())
+      {
+         std::map<int, std::string>::const_iterator p = m_error_strings.find(n);
+         return (p == m_error_strings.end()) ? std::string(get_default_error_string(n)) : p->second;
+      }
+      return get_default_error_string(n);
+   }
+   char_class_type lookup_classname(const charT* p1, const charT* p2) const
+   {
+      char_class_type result = lookup_classname_imp(p1, p2);
+      if(result == 0)
+      {
+         string_type temp(p1, p2);
+         this->m_pctype->tolower(&*temp.begin(), &*temp.begin() + temp.size());
+         result = lookup_classname_imp(&*temp.begin(), &*temp.begin() + temp.size());
+      }
+      return result;
+   }
+   string_type lookup_collatename(const charT* p1, const charT* p2) const;
+   string_type transform_primary(const charT* p1, const charT* p2) const;
+   string_type transform(const charT* p1, const charT* p2) const;
+private:
+   std::map<int, std::string>     m_error_strings;   // error messages indexed by numberic ID
+   std::map<string_type, char_class_type>  m_custom_class_names; // character class names
+   std::map<string_type, string_type>      m_custom_collate_names; // collating element names
+   unsigned                       m_collate_type;    // the form of the collation string
+   charT                          m_collate_delim;   // the collation group delimiter
+   //
+   // helpers:
+   //
+   char_class_type lookup_classname_imp(const charT* p1, const charT* p2) const;
+   void init();
+#ifdef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+public:
+   bool isctype(charT c, char_class_type m)const;
+#endif
+};
+
+#ifndef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+#if !defined(NDNBOOST_NO_INCLASS_MEMBER_INITIALIZATION)
+
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::char_class_type const cpp_regex_traits_implementation<charT>::mask_blank;
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::char_class_type const cpp_regex_traits_implementation<charT>::mask_word;
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::char_class_type const cpp_regex_traits_implementation<charT>::mask_unicode;
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::char_class_type const cpp_regex_traits_implementation<charT>::mask_vertical;
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::char_class_type const cpp_regex_traits_implementation<charT>::mask_horizontal;
+
+#endif
+#endif
+
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::string_type 
+   cpp_regex_traits_implementation<charT>::transform_primary(const charT* p1, const charT* p2) const
+{
+   //
+   // PRECONDITIONS:
+   //
+   // A bug in gcc 3.2 (and maybe other versions as well) treats
+   // p1 as a null terminated string, for efficiency reasons 
+   // we work around this elsewhere, but just assert here that
+   // we adhere to gcc's (buggy) preconditions...
+   //
+   NDNBOOST_ASSERT(*p2 == 0);
+
+   string_type result;
+   //
+   // swallowing all exceptions here is a bad idea
+   // however at least one std lib will always throw
+   // std::bad_alloc for certain arguments...
+   //
+#ifndef NDNBOOST_NO_EXCEPTIONS
+   try{
+#endif
+      //
+      // What we do here depends upon the format of the sort key returned by
+      // sort key returned by this->transform:
+      //
+      switch(m_collate_type)
+      {
+      case sort_C:
+      case sort_unknown:
+         // the best we can do is translate to lower case, then get a regular sort key:
+         {
+            result.assign(p1, p2);
+            this->m_pctype->tolower(&*result.begin(), &*result.begin() + result.size());
+            result = this->m_pcollate->transform(&*result.begin(), &*result.begin() + result.size());
+            break;
+         }
+      case sort_fixed:
+         {
+            // get a regular sort key, and then truncate it:
+            result.assign(this->m_pcollate->transform(p1, p2));
+            result.erase(this->m_collate_delim);
+            break;
+         }
+      case sort_delim:
+            // get a regular sort key, and then truncate everything after the delim:
+            result.assign(this->m_pcollate->transform(p1, p2));
+            std::size_t i;
+            for(i = 0; i < result.size(); ++i)
+            {
+               if(result[i] == m_collate_delim)
+                  break;
+            }
+            result.erase(i);
+            break;
+      }
+#ifndef NDNBOOST_NO_EXCEPTIONS
+   }catch(...){}
+#endif
+   while(result.size() && (charT(0) == *result.rbegin()))
+      result.erase(result.size() - 1);
+   if(result.empty())
+   {
+      // character is ignorable at the primary level:
+      result = string_type(1, charT(0));
+   }
+   return result;
+}
+
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::string_type 
+   cpp_regex_traits_implementation<charT>::transform(const charT* p1, const charT* p2) const
+{
+   //
+   // PRECONDITIONS:
+   //
+   // A bug in gcc 3.2 (and maybe other versions as well) treats
+   // p1 as a null terminated string, for efficiency reasons 
+   // we work around this elsewhere, but just assert here that
+   // we adhere to gcc's (buggy) preconditions...
+   //
+   NDNBOOST_ASSERT(*p2 == 0);
+   //
+   // swallowing all exceptions here is a bad idea
+   // however at least one std lib will always throw
+   // std::bad_alloc for certain arguments...
+   //
+   string_type result;
+#ifndef NDNBOOST_NO_EXCEPTIONS
+   try{
+#endif
+      result = this->m_pcollate->transform(p1, p2);
+      //
+      // Borland's STLPort version returns a NULL-terminated
+      // string that has garbage at the end - each call to
+      // std::collate<wchar_t>::transform returns a different string!
+      // So as a workaround, we'll truncate the string at the first NULL
+      // which _seems_ to work....
+#if NDNBOOST_WORKAROUND(__BORLANDC__, < 0x580)
+      result.erase(result.find(charT(0)));
+#else
+      //
+      // some implementations (Dinkumware) append unnecessary trailing \0's:
+      while(result.size() && (charT(0) == *result.rbegin()))
+         result.erase(result.size() - 1);
+#endif
+      NDNBOOST_ASSERT(std::find(result.begin(), result.end(), charT(0)) == result.end());
+#ifndef NDNBOOST_NO_EXCEPTIONS
+   }
+   catch(...)
+   {
+   }
+#endif
+   return result;
+}
+
+
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::string_type 
+   cpp_regex_traits_implementation<charT>::lookup_collatename(const charT* p1, const charT* p2) const
+{
+   typedef typename std::map<string_type, string_type>::const_iterator iter_type;
+   if(m_custom_collate_names.size())
+   {
+      iter_type pos = m_custom_collate_names.find(string_type(p1, p2));
+      if(pos != m_custom_collate_names.end())
+         return pos->second;
+   }
+#if !defined(NDNBOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS)\
+               && !NDNBOOST_WORKAROUND(NDNBOOST_MSVC, < 1300)\
+               && !NDNBOOST_WORKAROUND(__BORLANDC__, <= 0x0551)
+   std::string name(p1, p2);
+#else
+   std::string name;
+   const charT* p0 = p1;
+   while(p0 != p2)
+      name.append(1, char(*p0++));
+#endif
+   name = lookup_default_collate_name(name);
+#if !defined(NDNBOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS)\
+               && !NDNBOOST_WORKAROUND(NDNBOOST_MSVC, < 1300)\
+               && !NDNBOOST_WORKAROUND(__BORLANDC__, <= 0x0551)
+   if(name.size())
+      return string_type(name.begin(), name.end());
+#else
+   if(name.size())
+   {
+      string_type result;
+      typedef std::string::const_iterator iter;
+      iter b = name.begin();
+      iter e = name.end();
+      while(b != e)
+         result.append(1, charT(*b++));
+      return result;
+   }
+#endif
+   if(p2 - p1 == 1)
+      return string_type(1, *p1);
+   return string_type();
+}
+
+template <class charT>
+void cpp_regex_traits_implementation<charT>::init()
+{
+#ifndef NDNBOOST_NO_STD_MESSAGES
+#ifndef __IBMCPP__
+   typename std::messages<charT>::catalog cat = static_cast<std::messages<char>::catalog>(-1);
+#else
+   typename std::messages<charT>::catalog cat = reinterpret_cast<std::messages<char>::catalog>(-1);
+#endif
+   std::string cat_name(cpp_regex_traits<charT>::get_catalog_name());
+   if(cat_name.size() && (this->m_pmessages != 0))
+   {
+      cat = this->m_pmessages->open(
+         cat_name, 
+         this->m_locale);
+      if((int)cat < 0)
+      {
+         std::string m("Unable to open message catalog: ");
+         std::runtime_error err(m + cat_name);
+         ndnboost::re_detail::raise_runtime_error(err);
+      }
+   }
+   //
+   // if we have a valid catalog then load our messages:
+   //
+   if((int)cat >= 0)
+   {
+      //
+      // Error messages:
+      //
+      for(ndnboost::regex_constants::error_type i = static_cast<ndnboost::regex_constants::error_type>(0); 
+         i <= ndnboost::regex_constants::error_unknown; 
+         i = static_cast<ndnboost::regex_constants::error_type>(i + 1))
+      {
+         const char* p = get_default_error_string(i);
+         string_type default_message;
+         while(*p)
+         {
+            default_message.append(1, this->m_pctype->widen(*p));
+            ++p;
+         }
+         string_type s = this->m_pmessages->get(cat, 0, i+200, default_message);
+         std::string result;
+         for(std::string::size_type j = 0; j < s.size(); ++j)
+         {
+            result.append(1, this->m_pctype->narrow(s[j], 0));
+         }
+         m_error_strings[i] = result;
+      }
+      //
+      // Custom class names:
+      //
+#ifndef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+      static const char_class_type masks[16] = 
+      {
+         std::ctype<charT>::alnum,
+         std::ctype<charT>::alpha,
+         std::ctype<charT>::cntrl,
+         std::ctype<charT>::digit,
+         std::ctype<charT>::graph,
+         cpp_regex_traits_implementation<charT>::mask_horizontal,
+         std::ctype<charT>::lower,
+         std::ctype<charT>::print,
+         std::ctype<charT>::punct,
+         std::ctype<charT>::space,
+         std::ctype<charT>::upper,
+         cpp_regex_traits_implementation<charT>::mask_vertical,
+         std::ctype<charT>::xdigit,
+         cpp_regex_traits_implementation<charT>::mask_blank,
+         cpp_regex_traits_implementation<charT>::mask_word,
+         cpp_regex_traits_implementation<charT>::mask_unicode,
+      };
+#else
+      static const char_class_type masks[16] = 
+      {
+         ::ndnboost::re_detail::char_class_alnum,
+         ::ndnboost::re_detail::char_class_alpha,
+         ::ndnboost::re_detail::char_class_cntrl,
+         ::ndnboost::re_detail::char_class_digit,
+         ::ndnboost::re_detail::char_class_graph,
+         ::ndnboost::re_detail::char_class_horizontal_space,
+         ::ndnboost::re_detail::char_class_lower,
+         ::ndnboost::re_detail::char_class_print,
+         ::ndnboost::re_detail::char_class_punct,
+         ::ndnboost::re_detail::char_class_space,
+         ::ndnboost::re_detail::char_class_upper,
+         ::ndnboost::re_detail::char_class_vertical_space,
+         ::ndnboost::re_detail::char_class_xdigit,
+         ::ndnboost::re_detail::char_class_blank,
+         ::ndnboost::re_detail::char_class_word,
+         ::ndnboost::re_detail::char_class_unicode,
+      };
+#endif
+      static const string_type null_string;
+      for(unsigned int j = 0; j <= 13; ++j)
+      {
+         string_type s(this->m_pmessages->get(cat, 0, j+300, null_string));
+         if(s.size())
+            this->m_custom_class_names[s] = masks[j];
+      }
+   }
+#endif
+   //
+   // get the collation format used by m_pcollate:
+   //
+   m_collate_type = re_detail::find_sort_syntax(this, &m_collate_delim);
+}
+
+template <class charT>
+typename cpp_regex_traits_implementation<charT>::char_class_type 
+   cpp_regex_traits_implementation<charT>::lookup_classname_imp(const charT* p1, const charT* p2) const
+{
+#ifndef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+   static const char_class_type masks[22] = 
+   {
+      0,
+      std::ctype<char>::alnum, 
+      std::ctype<char>::alpha,
+      cpp_regex_traits_implementation<charT>::mask_blank,
+      std::ctype<char>::cntrl,
+      std::ctype<char>::digit,
+      std::ctype<char>::digit,
+      std::ctype<char>::graph,
+      cpp_regex_traits_implementation<charT>::mask_horizontal,
+      std::ctype<char>::lower,
+      std::ctype<char>::lower,
+      std::ctype<char>::print,
+      std::ctype<char>::punct,
+      std::ctype<char>::space,
+      std::ctype<char>::space,
+      std::ctype<char>::upper,
+      cpp_regex_traits_implementation<charT>::mask_unicode,
+      std::ctype<char>::upper,
+      cpp_regex_traits_implementation<charT>::mask_vertical,
+      std::ctype<char>::alnum | cpp_regex_traits_implementation<charT>::mask_word, 
+      std::ctype<char>::alnum | cpp_regex_traits_implementation<charT>::mask_word, 
+      std::ctype<char>::xdigit,
+   };
+#else
+   static const char_class_type masks[22] = 
+   {
+      0,
+      ::ndnboost::re_detail::char_class_alnum, 
+      ::ndnboost::re_detail::char_class_alpha,
+      ::ndnboost::re_detail::char_class_blank,
+      ::ndnboost::re_detail::char_class_cntrl,
+      ::ndnboost::re_detail::char_class_digit,
+      ::ndnboost::re_detail::char_class_digit,
+      ::ndnboost::re_detail::char_class_graph,
+      ::ndnboost::re_detail::char_class_horizontal_space,
+      ::ndnboost::re_detail::char_class_lower,
+      ::ndnboost::re_detail::char_class_lower,
+      ::ndnboost::re_detail::char_class_print,
+      ::ndnboost::re_detail::char_class_punct,
+      ::ndnboost::re_detail::char_class_space,
+      ::ndnboost::re_detail::char_class_space,
+      ::ndnboost::re_detail::char_class_upper,
+      ::ndnboost::re_detail::char_class_unicode,
+      ::ndnboost::re_detail::char_class_upper,
+      ::ndnboost::re_detail::char_class_vertical_space,
+      ::ndnboost::re_detail::char_class_alnum | ::ndnboost::re_detail::char_class_word, 
+      ::ndnboost::re_detail::char_class_alnum | ::ndnboost::re_detail::char_class_word, 
+      ::ndnboost::re_detail::char_class_xdigit,
+   };
+#endif
+   if(m_custom_class_names.size())
+   {
+      typedef typename std::map<std::basic_string<charT>, char_class_type>::const_iterator map_iter;
+      map_iter pos = m_custom_class_names.find(string_type(p1, p2));
+      if(pos != m_custom_class_names.end())
+         return pos->second;
+   }
+   std::size_t state_id = 1 + re_detail::get_default_class_id(p1, p2);
+   NDNBOOST_ASSERT(state_id < sizeof(masks) / sizeof(masks[0]));
+   return masks[state_id];
+}
+
+#ifdef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+template <class charT>
+bool cpp_regex_traits_implementation<charT>::isctype(const charT c, char_class_type mask) const
+{
+   return
+      ((mask & ::ndnboost::re_detail::char_class_space) && (this->m_pctype->is(std::ctype<charT>::space, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_print) && (this->m_pctype->is(std::ctype<charT>::print, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_cntrl) && (this->m_pctype->is(std::ctype<charT>::cntrl, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_upper) && (this->m_pctype->is(std::ctype<charT>::upper, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_lower) && (this->m_pctype->is(std::ctype<charT>::lower, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_alpha) && (this->m_pctype->is(std::ctype<charT>::alpha, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_digit) && (this->m_pctype->is(std::ctype<charT>::digit, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_punct) && (this->m_pctype->is(std::ctype<charT>::punct, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_xdigit) && (this->m_pctype->is(std::ctype<charT>::xdigit, c)))
+      || ((mask & ::ndnboost::re_detail::char_class_blank) && (this->m_pctype->is(std::ctype<charT>::space, c)) && !::ndnboost::re_detail::is_separator(c))
+      || ((mask & ::ndnboost::re_detail::char_class_word) && (c == '_'))
+      || ((mask & ::ndnboost::re_detail::char_class_unicode) && ::ndnboost::re_detail::is_extended(c))
+      || ((mask & ::ndnboost::re_detail::char_class_vertical_space) && (is_separator(c) || (c == '\v')))
+      || ((mask & ::ndnboost::re_detail::char_class_horizontal_space) && this->m_pctype->is(std::ctype<charT>::space, c) && !(is_separator(c) || (c == '\v')));
+}
+#endif
+
+
+template <class charT>
+inline ndnboost::shared_ptr<const cpp_regex_traits_implementation<charT> > create_cpp_regex_traits(const std::locale& l NDNBOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(charT))
+{
+   cpp_regex_traits_base<charT> key(l);
+   return ::ndnboost::object_cache<cpp_regex_traits_base<charT>, cpp_regex_traits_implementation<charT> >::get(key, 5);
+}
+
+} // re_detail
+
+template <class charT>
+class cpp_regex_traits
+{
+private:
+   typedef std::ctype<charT>            ctype_type;
+public:
+   typedef charT                        char_type;
+   typedef std::size_t                  size_type;
+   typedef std::basic_string<char_type> string_type;
+   typedef std::locale                  locale_type;
+   typedef ndnboost::uint_least32_t        char_class_type;
+
+   struct boost_extensions_tag{};
+
+   cpp_regex_traits()
+      : m_pimpl(re_detail::create_cpp_regex_traits<charT>(std::locale()))
+   { }
+   static size_type length(const char_type* p)
+   {
+      return std::char_traits<charT>::length(p);
+   }
+   regex_constants::syntax_type syntax_type(charT c)const
+   {
+      return m_pimpl->syntax_type(c);
+   }
+   regex_constants::escape_syntax_type escape_syntax_type(charT c) const
+   {
+      return m_pimpl->escape_syntax_type(c);
+   }
+   charT translate(charT c) const
+   {
+      return c;
+   }
+   charT translate_nocase(charT c) const
+   {
+      return m_pimpl->m_pctype->tolower(c);
+   }
+   charT translate(charT c, bool icase) const
+   {
+      return icase ? m_pimpl->m_pctype->tolower(c) : c;
+   }
+   charT tolower(charT c) const
+   {
+      return m_pimpl->m_pctype->tolower(c);
+   }
+   charT toupper(charT c) const
+   {
+      return m_pimpl->m_pctype->toupper(c);
+   }
+   string_type transform(const charT* p1, const charT* p2) const
+   {
+      return m_pimpl->transform(p1, p2);
+   }
+   string_type transform_primary(const charT* p1, const charT* p2) const
+   {
+      return m_pimpl->transform_primary(p1, p2);
+   }
+   char_class_type lookup_classname(const charT* p1, const charT* p2) const
+   {
+      return m_pimpl->lookup_classname(p1, p2);
+   }
+   string_type lookup_collatename(const charT* p1, const charT* p2) const
+   {
+      return m_pimpl->lookup_collatename(p1, p2);
+   }
+   bool isctype(charT c, char_class_type f) const
+   {
+#ifndef NDNBOOST_REGEX_BUGGY_CTYPE_FACET
+      typedef typename std::ctype<charT>::mask ctype_mask;
+
+      static const ctype_mask mask_base = 
+         static_cast<ctype_mask>(
+            std::ctype<charT>::alnum 
+            | std::ctype<charT>::alpha
+            | std::ctype<charT>::cntrl
+            | std::ctype<charT>::digit
+            | std::ctype<charT>::graph
+            | std::ctype<charT>::lower
+            | std::ctype<charT>::print
+            | std::ctype<charT>::punct
+            | std::ctype<charT>::space
+            | std::ctype<charT>::upper
+            | std::ctype<charT>::xdigit);
+
+      if((f & mask_base) 
+         && (m_pimpl->m_pctype->is(
+            static_cast<ctype_mask>(f & mask_base), c)))
+         return true;
+      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_unicode) && re_detail::is_extended(c))
+         return true;
+      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_word) && (c == '_'))
+         return true;
+      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_blank) 
+         && m_pimpl->m_pctype->is(std::ctype<charT>::space, c)
+         && !re_detail::is_separator(c))
+         return true;
+      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_vertical) 
+         && (::ndnboost::re_detail::is_separator(c) || (c == '\v')))
+         return true;
+      else if((f & re_detail::cpp_regex_traits_implementation<charT>::mask_horizontal) 
+         && this->isctype(c, std::ctype<charT>::space) && !this->isctype(c, re_detail::cpp_regex_traits_implementation<charT>::mask_vertical))
+         return true;
+      return false;
+#else
+      return m_pimpl->isctype(c, f);
+#endif
+   }
+   int toi(const charT*& p1, const charT* p2, int radix)const;
+   int value(charT c, int radix)const
+   {
+      const charT* pc = &c;
+      return toi(pc, pc + 1, radix);
+   }
+   locale_type imbue(locale_type l)
+   {
+      std::locale result(getloc());
+      m_pimpl = re_detail::create_cpp_regex_traits<charT>(l);
+      return result;
+   }
+   locale_type getloc()const
+   {
+      return m_pimpl->m_locale;
+   }
+   std::string error_string(regex_constants::error_type n) const
+   {
+      return m_pimpl->error_string(n);
+   }
+
+   //
+   // extension:
+   // set the name of the message catalog in use (defaults to "boost_regex").
+   //
+   static std::string catalog_name(const std::string& name);
+   static std::string get_catalog_name();
+
+private:
+   ndnboost::shared_ptr<const re_detail::cpp_regex_traits_implementation<charT> > m_pimpl;
+   //
+   // catalog name handler:
+   //
+   static std::string& get_catalog_name_inst();
+
+#ifdef NDNBOOST_HAS_THREADS
+   static static_mutex& get_mutex_inst();
+#endif
+};
+
+
+template <class charT>
+int cpp_regex_traits<charT>::toi(const charT*& first, const charT* last, int radix)const
+{
+   re_detail::parser_buf<charT>   sbuf;            // buffer for parsing numbers.
+   std::basic_istream<charT>      is(&sbuf);       // stream for parsing numbers.
+
+   // we do NOT want to parse any thousands separators inside the stream:
+   last = std::find(first, last, NDNBOOST_USE_FACET(std::numpunct<charT>, is.getloc()).thousands_sep());
+
+   sbuf.pubsetbuf(const_cast<charT*>(static_cast<const charT*>(first)), static_cast<std::streamsize>(last-first));
+   is.clear();
+   if(std::abs(radix) == 16) is >> std::hex;
+   else if(std::abs(radix) == 8) is >> std::oct;
+   else is >> std::dec;
+   int val;
+   if(is >> val)
+   {
+      first = first + ((last - first) - sbuf.in_avail());
+      return val;
+   }
+   else
+      return -1;
+}
+
+template <class charT>
+std::string cpp_regex_traits<charT>::catalog_name(const std::string& name)
+{
+#ifdef NDNBOOST_HAS_THREADS
+   static_mutex::scoped_lock lk(get_mutex_inst());
+#endif
+   std::string result(get_catalog_name_inst());
+   get_catalog_name_inst() = name;
+   return result;
+}
+
+template <class charT>
+std::string& cpp_regex_traits<charT>::get_catalog_name_inst()
+{
+   static std::string s_name;
+   return s_name;
+}
+
+template <class charT>
+std::string cpp_regex_traits<charT>::get_catalog_name()
+{
+#ifdef NDNBOOST_HAS_THREADS
+   static_mutex::scoped_lock lk(get_mutex_inst());
+#endif
+   std::string result(get_catalog_name_inst());
+   return result;
+}
+
+#ifdef NDNBOOST_HAS_THREADS
+template <class charT>
+static_mutex& cpp_regex_traits<charT>::get_mutex_inst()
+{
+   static static_mutex s_mutex = NDNBOOST_STATIC_MUTEX_INIT;
+   return s_mutex;
+}
+#endif
+
+
+} // boost
+
+#ifdef NDNBOOST_MSVC
+#pragma warning(pop)
+#endif
+
+#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
+
+#endif
+
+