ceph/src/boost/libs/test/include/boost/test/detail/pp_variadic.hpp

   1 //  (C) Copyright Gennadiy Rozental 2001.
   2 //  Distributed under the Boost Software License, Version 1.0.
   3 //  (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5
   6 //  See http://www.boost.org/libs/test for the library home page.
   7 //
   8 //!@file
   9 //!@brief few helpers for working with variadic macros
  10 // ***************************************************************************
  11
  12 #ifndef BOOST_TEST_PP_VARIADIC_HPP_021515GER
  13 #define BOOST_TEST_PP_VARIADIC_HPP_021515GER
  14
  15 // Boost
  16 #include <boost/preprocessor/control/iif.hpp>
  17 #include <boost/preprocessor/comparison/equal.hpp>
  18 #include <boost/preprocessor/variadic/size.hpp>
  19
  20 //____________________________________________________________________________//
  21
  22 #if BOOST_PP_VARIADICS
  23
  24 #if BOOST_PP_VARIADICS_MSVC
  25 #  define BOOST_TEST_INVOKE_VARIADIC( tool, ... ) BOOST_PP_CAT( tool (__VA_ARGS__), )
  26 #else
  27 #  define BOOST_TEST_INVOKE_VARIADIC( tool, ... ) tool (__VA_ARGS__)
  28 #endif
  29
  30 //____________________________________________________________________________//
  31
  32 /// if sizeof(__VA_ARGS__) == N: F1(__VA_ARGS__)
  33 /// else:                        F2(__VA_ARGS__)
  34 #define BOOST_TEST_INVOKE_IF_N_ARGS( N, F1, F2, ... )               \
  35     BOOST_TEST_INVOKE_VARIADIC(                                     \
  36         BOOST_PP_IIF(                                               \
  37             BOOST_PP_EQUAL(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), N), \
  38             F1,                                                     \
  39             F2),                                                    \
  40         __VA_ARGS__ )                                               \
  41 /**/
  42
  43 //____________________________________________________________________________//
  44
  45 #endif  /* BOOST_PP_VARIADICS */
  46
  47 #endif // BOOST_TEST_PP_VARIADIC_HPP_021515GER
  48
  49 // EOF