81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
# /* **************************************************************************
|
|
# * *
|
|
# * (C) Copyright Edward Diener 2014,2019.
|
|
# * 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>
|
|
# 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
|
|
# if defined(__cplusplus) && __cplusplus > 201703L
|
|
# include <boost/preprocessor/variadic/has_opt.hpp>
|
|
#define BOOST_PP_IS_EMPTY(...) \
|
|
BOOST_PP_DETAIL_IS_EMPTY_IIF \
|
|
( \
|
|
BOOST_PP_VARIADIC_HAS_OPT() \
|
|
) \
|
|
( \
|
|
BOOST_PP_IS_EMPTY_OPT, \
|
|
BOOST_PP_IS_EMPTY_NO_OPT \
|
|
) \
|
|
(__VA_ARGS__) \
|
|
/**/
|
|
#define BOOST_PP_IS_EMPTY_FUNCTION2(...) \
|
|
__VA_OPT__(0,) 1 \
|
|
/**/
|
|
#define BOOST_PP_IS_EMPTY_FUNCTION(...) \
|
|
BOOST_PP_IS_EMPTY_FUNCTION2(__VA_ARGS__) \
|
|
/**/
|
|
#define BOOST_PP_IS_EMPTY_OPT(...) \
|
|
BOOST_PP_VARIADIC_HAS_OPT_ELEM0(BOOST_PP_IS_EMPTY_FUNCTION(__VA_ARGS__),) \
|
|
/**/
|
|
# else
|
|
#define BOOST_PP_IS_EMPTY(...) \
|
|
BOOST_PP_IS_EMPTY_NO_OPT(__VA_ARGS__) \
|
|
/**/
|
|
# endif /* defined(__cplusplus) && __cplusplus > 201703L */
|
|
#define BOOST_PP_IS_EMPTY_NO_OPT(...) \
|
|
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_PREPROCESSOR_FACILITIES_IS_EMPTY_VARIADIC_HPP */
|