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Diffstat (limited to 'boost/preprocessor/facilities/is_empty_variadic.hpp')
-rw-r--r-- | boost/preprocessor/facilities/is_empty_variadic.hpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/boost/preprocessor/facilities/is_empty_variadic.hpp b/boost/preprocessor/facilities/is_empty_variadic.hpp new file mode 100644 index 0000000000..eee4062d79 --- /dev/null +++ b/boost/preprocessor/facilities/is_empty_variadic.hpp @@ -0,0 +1,57 @@ +# /* ************************************************************************** +# * * +# * (C) Copyright Edward Diener 2014. +# * 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) +# * * +# ************************************************************************** */ +# +# /* See http://www.boost.org for most recent version. */ +# +# ifndef BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP +# define BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP +# +# include <boost/preprocessor/config/config.hpp> +# +# if BOOST_PP_VARIADICS +# +# include <boost/preprocessor/punctuation/is_begin_parens.hpp> +# include <boost/preprocessor/facilities/detail/is_empty.hpp> +# +#if BOOST_PP_VARIADICS_MSVC && _MSC_VER <= 1400 +# +#define BOOST_PP_IS_EMPTY(param) \ + BOOST_PP_DETAIL_IS_EMPTY_IIF \ + ( \ + BOOST_PP_IS_BEGIN_PARENS \ + ( \ + param \ + ) \ + ) \ + ( \ + BOOST_PP_IS_EMPTY_ZERO, \ + BOOST_PP_DETAIL_IS_EMPTY_PROCESS \ + ) \ + (param) \ +/**/ +#define BOOST_PP_IS_EMPTY_ZERO(param) 0 +# else +#define BOOST_PP_IS_EMPTY(...) \ + BOOST_PP_DETAIL_IS_EMPTY_IIF \ + ( \ + BOOST_PP_IS_BEGIN_PARENS \ + ( \ + __VA_ARGS__ \ + ) \ + ) \ + ( \ + BOOST_PP_IS_EMPTY_ZERO, \ + BOOST_PP_DETAIL_IS_EMPTY_PROCESS \ + ) \ + (__VA_ARGS__) \ +/**/ +#define BOOST_PP_IS_EMPTY_ZERO(...) 0 +# endif /* BOOST_PP_VARIADICS_MSVC && _MSC_VER <= 1400 */ +# endif /* BOOST_PP_VARIADICS */ +# endif /* BOOST_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP */ |