is_empty.hpp

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# /* **************************************************************************
#  *                                                                          *
#  *     (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 MSGPACK_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
#define MSGPACK_PREPROCESSOR_DETAIL_IS_EMPTY_HPP
 
#include <msgpack/preprocessor/punctuation/is_begin_parens.hpp>
 
#if MSGPACK_PP_VARIADICS_MSVC
 
# pragma warning(once:4002)
 
#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_0(t, b) b
#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_1(t, b) t
 
#else
 
#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_0(t, ...) __VA_ARGS__
#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF_1(t, ...) t
 
#endif
 
#if MSGPACK_PP_VARIADICS_MSVC && _MSC_VER <= 1400
 
#define MSGPACK_PP_DETAIL_IS_EMPTY_PROCESS(param) \
        MSGPACK_PP_IS_BEGIN_PARENS \
        ( \
        MSGPACK_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C param () \
        ) \
/**/
 
#else
 
#define MSGPACK_PP_DETAIL_IS_EMPTY_PROCESS(...) \
        MSGPACK_PP_IS_BEGIN_PARENS \
        ( \
        MSGPACK_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C __VA_ARGS__ () \
        ) \
/**/
 
#endif
 
#define MSGPACK_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(a, b) a ## b
#define MSGPACK_PP_DETAIL_IS_EMPTY_IIF(bit) MSGPACK_PP_DETAIL_IS_EMPTY_PRIMITIVE_CAT(MSGPACK_PP_DETAIL_IS_EMPTY_IIF_,bit)
#define MSGPACK_PP_DETAIL_IS_EMPTY_NON_FUNCTION_C(...) ()
 
#endif /* MSGPACK_PREPROCESSOR_DETAIL_IS_EMPTY_HPP */