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+#ifndef BOOST_METAPARSE_V1_IMPL_NTH_OF_C_HPP
+#define BOOST_METAPARSE_V1_IMPL_NTH_OF_C_HPP
+
+// Copyright Abel Sinkovics (abel@sinkovics.hu) 2013.
+// 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/impl/nth_of_c_impl.hpp>
+#include <boost/metaparse/v1/error/index_out_of_range.hpp>
+#include <boost/metaparse/v1/fail.hpp>
+#include <boost/metaparse/limit_sequence_size.hpp>
+
+#include <boost/mpl/list.hpp>
+
+#include <boost/preprocessor/repetition/repeat.hpp>
+#include <boost/preprocessor/punctuation/comma_if.hpp>
+#include <boost/preprocessor/repetition/enum_params.hpp>
+#include <boost/preprocessor/cat.hpp>
+
+namespace boost
+{
+ namespace metaparse
+ {
+ namespace v1
+ {
+ namespace impl
+ {
+ #ifdef BOOST_METAPARSE_NTH_OF_CASE
+ # error BOOST_METAPARSE_NTH_OF_CASE already defined
+ #endif
+ #define BOOST_METAPARSE_NTH_OF_CASE(z, n, unused) \
+ template < \
+ int K BOOST_PP_COMMA_IF(n) \
+ BOOST_PP_ENUM_PARAMS(n, class P) \
+ > \
+ struct BOOST_PP_CAT(nth_of_c, n) : \
+ boost::mpl::if_< \
+ boost::mpl::bool_<(0 <= K && K < n)>, \
+ nth_of_c_impl< \
+ K, \
+ boost::mpl::list<BOOST_PP_ENUM_PARAMS(n, P)> \
+ >, \
+ fail<error::index_out_of_range<0, n - 1, K> > \
+ >::type \
+ {};
+
+ BOOST_PP_REPEAT(
+ BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE,
+ BOOST_METAPARSE_NTH_OF_CASE,
+ ~
+ )
+
+ #undef BOOST_METAPARSE_NTH_OF_CASE
+ }
+ }
+ }
+}
+
+#endif
+