/*!
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@file
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Defines generally useful preprocessor macros.
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@copyright Louis Dionne 2013-2017
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_HANA_DETAIL_PREPROCESSOR_HPP
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#define BOOST_HANA_DETAIL_PREPROCESSOR_HPP
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//! @ingroup group-details
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//! Expands to the concatenation of its two arguments.
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#define BOOST_HANA_PP_CONCAT(x, y) BOOST_HANA_PP_CONCAT_PRIMITIVE(x, y)
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#define BOOST_HANA_PP_CONCAT_PRIMITIVE(x, y) x ## y
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//! @ingroup group-details
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//! Expands to the stringized version of its argument.
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#define BOOST_HANA_PP_STRINGIZE(...) BOOST_HANA_PP_STRINGIZE_PRIMITIVE(__VA_ARGS__)
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#define BOOST_HANA_PP_STRINGIZE_PRIMITIVE(...) #__VA_ARGS__
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//! @ingroup group-details
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//! Expands to its first argument.
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#ifdef BOOST_HANA_WORKAROUND_MSVC_PREPROCESSOR_616033
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#define BOOST_HANA_PP_FRONT(...) BOOST_HANA_PP_FRONT_IMPL_I(__VA_ARGS__)
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#define BOOST_HANA_PP_FRONT_IMPL_I(...) BOOST_HANA_PP_CONCAT(BOOST_HANA_PP_FRONT_IMPL(__VA_ARGS__, ),)
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#else
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#define BOOST_HANA_PP_FRONT(...) BOOST_HANA_PP_FRONT_IMPL(__VA_ARGS__, )
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#endif
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#define BOOST_HANA_PP_FRONT_IMPL(e0, ...) e0
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//! @ingroup group-details
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//! Expands to all of its arguments, except for the first one.
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//!
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//! This macro may not be called with less than 2 arguments.
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#define BOOST_HANA_PP_DROP_FRONT(e0, ...) __VA_ARGS__
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#endif // !BOOST_HANA_DETAIL_PREPROCESSOR_HPP
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