ceph/src/boost/libs/vmd/test/test_is_empty_tuple_succeed.cxx

   1
   2 //  (C) Copyright Edward Diener 2011-2015
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6
   7 #include <boost/detail/lightweight_test.hpp>
   8 #include <boost/preprocessor/cat.hpp>
   9 #include <boost/preprocessor/control/if.hpp>
  10 #include <boost/preprocessor/tuple/elem.hpp>
  11
  12 int main()
  13   {
  14
  15 #if BOOST_PP_VARIADICS
  16
  17 #define TN_GEN_ONE(p) (1)
  18 #define TN_GEN_ZERO(p) (0)
  19
  20 #define TN_TEST_ONE_MORE(parameter,ens) \
  21         BOOST_PP_IF \
  22             ( \
  23             BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(1,0,ens),0), \
  24             TN_GEN_ONE, \
  25             TN_GEN_ZERO \
  26             ) \
  27         (parameter) \
  28 /**/
  29
  30 #define TN_TEST_ONE(parameter,ens) \
  31     BOOST_PP_TUPLE_ELEM \
  32         ( \
  33         1, \
  34         0, \
  35         TN_TEST_ONE_MORE(parameter,ens) \
  36         ) \
  37 /**/
  38
  39    BOOST_TEST_EQ(TN_TEST_ONE(A,(1)),1);
  40    BOOST_TEST_EQ(TN_TEST_ONE(A,()),0);
  41
  42 #else
  43
  44 BOOST_ERROR("No variadic macro support");
  45
  46 #endif /* BOOST_PP_VARIADICS */
  47
  48   return boost::report_errors();
  49
  50   }