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Diffstat (limited to 'boost/contract/detail/preprocessor/keyword/utility/is.hpp')
-rw-r--r-- | boost/contract/detail/preprocessor/keyword/utility/is.hpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/boost/contract/detail/preprocessor/keyword/utility/is.hpp b/boost/contract/detail/preprocessor/keyword/utility/is.hpp new file mode 100644 index 0000000000..d786033544 --- /dev/null +++ b/boost/contract/detail/preprocessor/keyword/utility/is.hpp @@ -0,0 +1,30 @@ + +#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 + |