50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
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// (C) Copyright Gennadiy Rozental 2001.
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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// See http://www.boost.org/libs/test for the library home page.
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//
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//!@file
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//!@brief few helpers for working with variadic macros
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// ***************************************************************************
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#ifndef BOOST_TEST_PP_VARIADIC_HPP_021515GER
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#define BOOST_TEST_PP_VARIADIC_HPP_021515GER
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// Boost
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#include <boost/preprocessor/control/iif.hpp>
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#include <boost/preprocessor/comparison/equal.hpp>
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#include <boost/preprocessor/variadic/size.hpp>
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//____________________________________________________________________________//
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#if BOOST_PP_VARIADICS
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#if BOOST_PP_VARIADICS_MSVC
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# define BOOST_TEST_INVOKE_VARIADIC( tool, ... ) BOOST_PP_CAT( tool (__VA_ARGS__), )
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#else
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# define BOOST_TEST_INVOKE_VARIADIC( tool, ... ) tool (__VA_ARGS__)
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#endif
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//____________________________________________________________________________//
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/// if sizeof(__VA_ARGS__) == N: F1(__VA_ARGS__)
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/// else: F2(__VA_ARGS__)
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#define BOOST_TEST_INVOKE_IF_N_ARGS( N, F1, F2, ... ) \
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BOOST_TEST_INVOKE_VARIADIC( \
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BOOST_PP_IIF( \
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BOOST_PP_EQUAL(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), N), \
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F1, \
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F2), \
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__VA_ARGS__ ) \
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/**/
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//____________________________________________________________________________//
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#endif /* BOOST_PP_VARIADICS */
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#endif // BOOST_TEST_PP_VARIADIC_HPP_021515GER
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// EOF
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