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+#ifndef BOOST_METAPARSE_V1_UTIL_INT_TO_DIGIT_HPP
+#define BOOST_METAPARSE_V1_UTIL_INT_TO_DIGIT_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu) 2012.
+// 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)
+
+#include <boost/metaparse/v1/util/int_to_digit_c.hpp>
+
+#include <boost/mpl/vector.hpp>
+
+namespace boost
+{
+ namespace metaparse
+ {
+ namespace v1
+ {
+ namespace util
+ {
+ template <class N = boost::mpl::na>
+ struct int_to_digit : int_to_digit_c<N::type::value> {};
+
+ template <>
+ struct int_to_digit<boost::mpl::na>
+ {
+ typedef int_to_digit type;
+
+ template <class N = boost::mpl::na>
+ struct apply : int_to_digit<N> {};
+ };
+ }
+ }
+ }
+}
+
+#endif
+