Chris@102: # /* **************************************************************************
Chris@102: #  *                                                                          *
Chris@102: #  *     (C) Copyright Edward Diener 2014.
Chris@102: #  *     Distributed under the Boost Software License, Version 1.0. (See
Chris@102: #  *     accompanying file LICENSE_1_0.txt or copy at
Chris@102: #  *     http://www.boost.org/LICENSE_1_0.txt)
Chris@102: #  *                                                                          *
Chris@102: #  ************************************************************************** */
Chris@102: #
Chris@102: # /* See http://www.boost.org for most recent version. */
Chris@102: #
Chris@102: #ifndef BOOST_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
Chris@102: #define BOOST_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
Chris@102: 
Chris@102: #include <boost/preprocessor/punctuation/is_begin_parens.hpp>
Chris@102: 
Chris@102: #if BOOST_PP_VARIADICS_MSVC
Chris@102: 
Chris@102: # pragma warning(once:4002)
Chris@102: 
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_IIF_0(t, b) b
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_IIF_1(t, b) t
Chris@102: 
Chris@102: #else
Chris@102: 
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_IIF_1(t, ...) t
Chris@102: 
Chris@102: #endif
Chris@102: 
Chris@102: #if BOOST_PP_VARIADICS_MSVC && _MSC_VER <= 1400
Chris@102: 
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_PROCESS(param) \
Chris@102: 	BOOST_PP_IS_BEGIN_PARENS \
Chris@102:     	( \
Chris@102:         BOOST_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \
Chris@102:         ) \
Chris@102: /**/
Chris@102: 
Chris@102: #else
Chris@102: 
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_PROCESS(...) \
Chris@102: 	BOOST_PP_IS_BEGIN_PARENS \
Chris@102:         ( \
Chris@102:         BOOST_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
Chris@102:         ) \
Chris@102: /**/
Chris@102: 
Chris@102: #endif
Chris@102: 
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_IIF(bit) BOOST_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(BOOST_PP_DETAIL_IS_EMPTY_IIF_,bit)
Chris@102: #define BOOST_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) ()
Chris@102: 
Chris@102: #endif /* BOOST_PREPROCESSOR_DETAIL_IS_EMPTY_HPP */