Added boost header

test/external/boost/xpressive/regex_traits.hpp

@@ -0,0 +1,107 @@
+///////////////////////////////////////////////////////////////////////////////
+/// \file regex_traits.hpp
+/// Includes the C regex traits or the CPP regex traits header file depending on the
+/// BOOST_XPRESSIVE_USE_C_TRAITS macro.
+//
+//  Copyright 2008 Eric Niebler. 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)
+
+#ifndef BOOST_XPRESSIVE_REGEX_TRAITS_HPP_EAN_10_04_2005
+#define BOOST_XPRESSIVE_REGEX_TRAITS_HPP_EAN_10_04_2005
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <boost/type_traits/is_convertible.hpp>
+#include <boost/xpressive/detail/detail_fwd.hpp>
+
+#ifdef BOOST_XPRESSIVE_USE_C_TRAITS
+# include <boost/xpressive/traits/c_regex_traits.hpp>
+#else
+# include <boost/xpressive/traits/cpp_regex_traits.hpp>
+#endif
+
+namespace boost { namespace xpressive
+{
+
+///////////////////////////////////////////////////////////////////////////////
+// regex_traits_version_1_tag
+/// Tag used to denote that a traits class conforms to the version 1 traits
+/// interface.
+struct regex_traits_version_1_tag
+{
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// regex_traits_version_2_tag
+/// Tag used to denote that a traits class conforms to the version 2 traits
+/// interface.
+struct regex_traits_version_2_tag
+  : regex_traits_version_1_tag
+{
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// regex_traits_version_1_case_fold_tag DEPRECATED use has_fold_case trait
+/// INTERNAL ONLY
+///
+struct regex_traits_version_1_case_fold_tag
+  : regex_traits_version_1_tag
+{
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// has_fold_case
+/// Trait used to denote that a traits class has the fold_case member function.
+template<typename Traits>
+struct has_fold_case
+  : is_convertible<
+        typename Traits::version_tag *
+      , regex_traits_version_1_case_fold_tag *
+    >
+{
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// regex_traits
+/// Thin wrapper around the default regex_traits implementation, either
+/// cpp_regex_traits or c_regex_traits
+///
+template<typename Char, typename Impl>
+struct regex_traits
+  : Impl
+{
+    typedef typename Impl::locale_type locale_type;
+
+    regex_traits()
+      : Impl()
+    {
+    }
+
+    explicit regex_traits(locale_type const &loc)
+      : Impl(loc)
+    {
+    }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// lookup_classname
+/// INTERNAL ONLY
+template<typename Traits, std::size_t N>
+inline typename Traits::char_class_type
+lookup_classname(Traits const &traits, char const (&cname)[N], bool icase)
+{
+    typename Traits::char_type name[N] = {0};
+    for(std::size_t j = 0; j < N-1; ++j)
+    {
+        name[j] = traits.widen(cname[j]);
+    }
+    return traits.lookup_classname(name, name + N - 1, icase);
+}
+
+}}
+
+#endif