40 lines
1.7 KiB
C++
40 lines
1.7 KiB
C++
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# /* **************************************************************************
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# * *
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# * (C) Copyright Edward Diener 2019. *
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# * Distributed under the Boost Software License, Version 1.0. (See *
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# * accompanying file LICENSE_1_0.txt or copy at *
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# * http://www.boost.org/LICENSE_1_0.txt) *
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# * *
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# ************************************************************************** */
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#
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# /* See http://www.boost.org for most recent version. */
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#
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# ifndef BOOST_PREPROCESSOR_VARIADIC_DETAIL_HAS_OPT_HPP
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# define BOOST_PREPROCESSOR_VARIADIC_DETAIL_HAS_OPT_HPP
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#
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# include <boost/preprocessor/config/config.hpp>
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#
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# if defined(__cplusplus) && __cplusplus > 201703L
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#
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# if BOOST_PP_VARIADICS_MSVC
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# include <boost/preprocessor/cat.hpp>
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# endif
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#
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# define BOOST_PP_VARIADIC_HAS_OPT_FUNCTION(...) \
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__VA_OPT__(,) , 1, 0 \
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/**/
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#
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# if BOOST_PP_VARIADICS_MSVC
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# define BOOST_PP_VARIADIC_HAS_OPT_ELEM0(e0, ...) BOOST_PP_CAT(BOOST_PP_VARIADIC_HAS_OPT_ELEM_0(e0,__VA_ARGS__),)
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# define BOOST_PP_VARIADIC_HAS_OPT_ELEM2(e0, ...) BOOST_PP_CAT(BOOST_PP_VARIADIC_HAS_OPT_ELEM_2(e0,__VA_ARGS__),)
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# else
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# define BOOST_PP_VARIADIC_HAS_OPT_ELEM0(e0, ...) BOOST_PP_VARIADIC_HAS_OPT_ELEM_0(e0,__VA_ARGS__)
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# define BOOST_PP_VARIADIC_HAS_OPT_ELEM2(e0, ...) BOOST_PP_VARIADIC_HAS_OPT_ELEM_2(e0,__VA_ARGS__)
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# endif
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# define BOOST_PP_VARIADIC_HAS_OPT_ELEM_0(e0, ...) e0
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# define BOOST_PP_VARIADIC_HAS_OPT_ELEM_2(e0, e1, e2, ...) e2
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#
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# endif
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#
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# endif
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