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Diffstat (limited to 'boost/metaparse/v1/cpp98/nth_of_c.hpp')
| -rw-r--r-- | boost/metaparse/v1/cpp98/nth_of_c.hpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/boost/metaparse/v1/cpp98/nth_of_c.hpp b/boost/metaparse/v1/cpp98/nth_of_c.hpp new file mode 100644 index 0000000000..ae86d31c5b --- /dev/null +++ b/boost/metaparse/v1/cpp98/nth_of_c.hpp @@ -0,0 +1,70 @@ +#ifndef BOOST_METAPARSE_V1_CPP98_NTH_OF_C_HPP +#define BOOST_METAPARSE_V1_CPP98_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.hpp> +#include <boost/metaparse/limit_sequence_size.hpp> + +#include <boost/preprocessor/repetition/repeat.hpp> +#include <boost/preprocessor/repetition/enum.hpp> +#include <boost/preprocessor/punctuation/comma_if.hpp> +#include <boost/preprocessor/repetition/enum_params.hpp> +#include <boost/preprocessor/repetition/enum_params_with_a_default.hpp> +#include <boost/preprocessor/arithmetic/sub.hpp> +#include <boost/preprocessor/cat.hpp> +#include <boost/preprocessor/tuple/eat.hpp> + +namespace boost +{ + namespace metaparse + { + namespace v1 + { + template < + int N, + BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT( + BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE, + class P, + boost::mpl::na + ) + > + struct nth_of_c; + + #ifdef BOOST_METAPARSE_NTH_OF_N + # error BOOST_METAPARSE_NTH_OF_N already defined + #endif + #define BOOST_METAPARSE_NTH_OF_N(z, n, unused) \ + template <int K BOOST_PP_COMMA_IF(n) BOOST_PP_ENUM_PARAMS(n, class P)> \ + struct nth_of_c< \ + K, \ + BOOST_PP_ENUM_PARAMS(n, P) \ + BOOST_PP_COMMA_IF(n) \ + BOOST_PP_ENUM( \ + BOOST_PP_SUB(BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE, n), \ + boost::mpl::na BOOST_PP_TUPLE_EAT(3), \ + ~ \ + ) \ + > : \ + impl::BOOST_PP_CAT(nth_of_c, n)< \ + K BOOST_PP_COMMA_IF(n) \ + BOOST_PP_ENUM_PARAMS(n, P) \ + > \ + {}; + + BOOST_PP_REPEAT( + BOOST_METAPARSE_LIMIT_SEQUENCE_SIZE, + BOOST_METAPARSE_NTH_OF_N, + ~ + ) + + #undef BOOST_METAPARSE_NTH_OF_N + } + } +} + +#endif + |