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- #ifndef BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_HPP_
- #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_HPP_
- // Copyright (C) 2008-2018 Lorenzo Caminiti
- // Distributed under the Boost Software License, Version 1.0 (see accompanying
- // file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
- // See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
- #include <boost/preprocessor/cat.hpp>
- #include <boost/preprocessor/variadic/size.hpp>
- /* PRIVATE */
- #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_1 0
- #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_2 1
- /* PUBLIC */
- // Precondition: A macro named `cat_to_comma_prefix ## token-to-check` must be
- // #defined to expand to `,`.
- // Precondition: tokens must start with a token concatenable to a macro name
- // (e.g., a literal or integral token).
- #define BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS( \
- cat_to_comma_prefix, tokens) \
- BOOST_PP_CAT(BOOST_CONTRACT_DETAIL_PP_KEYWORD_UTILITY_IS_, \
- BOOST_PP_VARIADIC_SIZE(BOOST_PP_CAT(cat_to_comma_prefix, tokens)))
- #endif // #include guard
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