boost/vmd/detail/is_empty.hpp

//  (C) Copyright Edward Diener 2011-2015
//  Use, modification and distribution are subject to 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).
#if !defined(BOOST_VMD_DETAIL_IS_EMPTY_HPP)
#define BOOST_VMD_DETAIL_IS_EMPTY_HPP
#include <boost/preprocessor/punctuation/is_begin_parens.hpp>
#if BOOST_VMD_MSVC
# pragma warning(once:4002)
#define BOOST_VMD_DETAIL_IS_EMPTY_IIF_0(t, b) b
#define BOOST_VMD_DETAIL_IS_EMPTY_IIF_1(t, b) t
#if BOOST_VMD_MSVC_V8
#define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(param) \
    BOOST_PP_IS_BEGIN_PARENS \
        ( \
        BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \
        ) \
/**/
#else
#define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(...) \
    BOOST_PP_IS_BEGIN_PARENS \
        ( \
        BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
        ) \
/**/
#endif
#else
#define BOOST_VMD_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__
#define BOOST_VMD_DETAIL_IS_EMPTY_IIF_1(t, ...) t
#define BOOST_VMD_DETAIL_IS_EMPTY_PROCESS(...) \
    BOOST_PP_IS_BEGIN_PARENS \
        ( \
        BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
        ) \
/**/
#endif /* BOOST_VMD_MSVC */
#define BOOST_VMD_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b
#define BOOST_VMD_DETAIL_IS_EMPTY_IIF(bit) \
    BOOST_VMD_DETAIL_IS_EMPTY_PRIMITIVE_CAT(BOOST_VMD_DETAIL_IS_EMPTY_IIF_,bit) \
/**/
#define BOOST_VMD_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) ()
#define BOOST_VMD_DETAIL_IS_EMPTY_GEN_ZERO(...) 0
#endif /* BOOST_VMD_DETAIL_IS_EMPTY_HPP */