#ifndef BOOST_METAPARSE_V1_CPP98_IMPL_NTH_OF_C_HPP #define BOOST_METAPARSE_V1_CPP98_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/cpp98/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