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diff --git a/boost/spirit/home/x3/support/traits/string_traits.hpp b/boost/spirit/home/x3/support/traits/string_traits.hpp
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+/*=============================================================================
+ Copyright (c) 2001-2014 Joel de Guzman
+ Copyright (c) 2001-2011 Hartmut Kaiser
+ Copyright (c) 2010 Bryce Lelbach
+
+ Distributed under 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)
+================================================_==============================*/
+#if !defined(BOOST_SPIRIT_X3_STRING_TRAITS_OCTOBER_2008_1252PM)
+#define BOOST_SPIRIT_X3_STRING_TRAITS_OCTOBER_2008_1252PM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <string>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/identity.hpp>
+
+namespace boost { namespace spirit { namespace x3 { namespace traits
+{
+ ///////////////////////////////////////////////////////////////////////////
+ // Determine if T is a character type
+ ///////////////////////////////////////////////////////////////////////////
+ template <typename T>
+ struct is_char : mpl::false_ {};
+
+ template <typename T>
+ struct is_char<T const> : is_char<T> {};
+
+ template <>
+ struct is_char<char> : mpl::true_ {};
+
+ template <>
+ struct is_char<wchar_t> : mpl::true_ {};
+
+ ///////////////////////////////////////////////////////////////////////////
+ // Determine if T is a string
+ ///////////////////////////////////////////////////////////////////////////
+ template <typename T>
+ struct is_string : mpl::false_ {};
+
+ template <typename T>
+ struct is_string<T const> : is_string<T> {};
+
+ template <>
+ struct is_string<char const*> : mpl::true_ {};
+
+ template <>
+ struct is_string<wchar_t const*> : mpl::true_ {};
+
+ template <>
+ struct is_string<char*> : mpl::true_ {};
+
+ template <>
+ struct is_string<wchar_t*> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<char[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<wchar_t[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<char const[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<wchar_t const[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<char(&)[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<wchar_t(&)[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<char const(&)[N]> : mpl::true_ {};
+
+ template <std::size_t N>
+ struct is_string<wchar_t const(&)[N]> : mpl::true_ {};
+
+ template <typename T, typename Traits, typename Allocator>
+ struct is_string<std::basic_string<T, Traits, Allocator> > : mpl::true_ {};
+
+ ///////////////////////////////////////////////////////////////////////////
+ // Get the underlying char type of a string
+ ///////////////////////////////////////////////////////////////////////////
+ template <typename T>
+ struct char_type_of;
+
+ template <typename T>
+ struct char_type_of<T const> : char_type_of<T> {};
+
+ template <>
+ struct char_type_of<char> : mpl::identity<char> {};
+
+ template <>
+ struct char_type_of<wchar_t> : mpl::identity<wchar_t> {};
+
+ template <>
+ struct char_type_of<char const*> : mpl::identity<char const> {};
+
+ template <>
+ struct char_type_of<wchar_t const*> : mpl::identity<wchar_t const> {};
+
+ template <>
+ struct char_type_of<char*> : mpl::identity<char> {};
+
+ template <>
+ struct char_type_of<wchar_t*> : mpl::identity<wchar_t> {};
+
+ template <std::size_t N>
+ struct char_type_of<char[N]> : mpl::identity<char> {};
+
+ template <std::size_t N>
+ struct char_type_of<wchar_t[N]> : mpl::identity<wchar_t> {};
+
+ template <std::size_t N>
+ struct char_type_of<char const[N]> : mpl::identity<char const> {};
+
+ template <std::size_t N>
+ struct char_type_of<wchar_t const[N]> : mpl::identity<wchar_t const> {};
+
+ template <std::size_t N>
+ struct char_type_of<char(&)[N]> : mpl::identity<char> {};
+
+ template <std::size_t N>
+ struct char_type_of<wchar_t(&)[N]> : mpl::identity<wchar_t> {};
+
+ template <std::size_t N>
+ struct char_type_of<char const(&)[N]> : mpl::identity<char const> {};
+
+ template <std::size_t N>
+ struct char_type_of<wchar_t const(&)[N]> : mpl::identity<wchar_t const> {};
+
+ template <typename T, typename Traits, typename Allocator>
+ struct char_type_of<std::basic_string<T, Traits, Allocator> >
+ : mpl::identity<T> {};
+
+ ///////////////////////////////////////////////////////////////////////////
+ // Get the C string from a string
+ ///////////////////////////////////////////////////////////////////////////
+ template <typename String>
+ struct extract_c_string;
+
+ template <typename String>
+ struct extract_c_string
+ {
+ typedef typename char_type_of<String>::type char_type;
+
+ template <typename T>
+ static T const* call (T* str)
+ {
+ return (T const*)str;
+ }
+
+ template <typename T>
+ static T const* call (T const* str)
+ {
+ return str;
+ }
+ };
+
+ // Forwarder that strips const
+ template <typename T>
+ struct extract_c_string<T const>
+ {
+ typedef typename extract_c_string<T>::char_type char_type;
+
+ static typename extract_c_string<T>::char_type const* call (T const str)
+ {
+ return extract_c_string<T>::call(str);
+ }
+ };
+
+ // Forwarder that strips references
+ template <typename T>
+ struct extract_c_string<T&>
+ {
+ typedef typename extract_c_string<T>::char_type char_type;
+
+ static typename extract_c_string<T>::char_type const* call (T& str)
+ {
+ return extract_c_string<T>::call(str);
+ }
+ };
+
+ // Forwarder that strips const references
+ template <typename T>
+ struct extract_c_string<T const&>
+ {
+ typedef typename extract_c_string<T>::char_type char_type;
+
+ static typename extract_c_string<T>::char_type const* call (T const& str)
+ {
+ return extract_c_string<T>::call(str);
+ }
+ };
+
+ template <typename T, typename Traits, typename Allocator>
+ struct extract_c_string<std::basic_string<T, Traits, Allocator> >
+ {
+ typedef T char_type;
+
+ typedef std::basic_string<T, Traits, Allocator> string;
+
+ static T const* call (string const& str)
+ {
+ return str.c_str();
+ }
+ };
+
+ template <typename T>
+ typename extract_c_string<T*>::char_type const*
+ get_c_string(T* str)
+ {
+ return extract_c_string<T*>::call(str);
+ }
+
+ template <typename T>
+ typename extract_c_string<T const*>::char_type const*
+ get_c_string(T const* str)
+ {
+ return extract_c_string<T const*>::call(str);
+ }
+
+ template <typename String>
+ typename extract_c_string<String>::char_type const*
+ get_c_string(String& str)
+ {
+ return extract_c_string<String>::call(str);
+ }
+
+ template <typename String>
+ typename extract_c_string<String>::char_type const*
+ get_c_string(String const& str)
+ {
+ return extract_c_string<String>::call(str);
+ }
+
+ ///////////////////////////////////////////////////////////////////////////
+ // Get the begin/end iterators from a string
+ ///////////////////////////////////////////////////////////////////////////
+
+ // Implementation for C-style strings.
+
+ template <typename T>
+ inline T const* get_string_begin(T const* str) { return str; }
+
+ template <typename T>
+ inline T* get_string_begin(T* str) { return str; }
+
+ template <typename T>
+ inline T const* get_string_end(T const* str)
+ {
+ T const* last = str;
+ while (*last)
+ last++;
+ return last;
+ }
+
+ template <typename T>
+ inline T* get_string_end(T* str)
+ {
+ T* last = str;
+ while (*last)
+ last++;
+ return last;
+ }
+
+ // Implementation for containers (includes basic_string).
+ template <typename T, typename Str>
+ inline typename Str::const_iterator get_string_begin(Str const& str)
+ { return str.begin(); }
+
+ template <typename T, typename Str>
+ inline typename Str::iterator
+ get_string_begin(Str& str)
+ { return str.begin(); }
+
+ template <typename T, typename Str>
+ inline typename Str::const_iterator get_string_end(Str const& str)
+ { return str.end(); }
+
+ template <typename T, typename Str>
+ inline typename Str::iterator
+ get_string_end(Str& str)
+ { return str.end(); }
+}}}}
+
+#endif
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