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

   1
   2 //  (C) Copyright Edward Diener 2011-2015,2019
   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/vmd/is_empty.hpp>
   8 #include <boost/preprocessor/facilities/empty.hpp>
   9 #include <boost/preprocessor/variadic/has_opt.hpp>
  10 #include <boost/detail/lightweight_test.hpp>
  11
  12 int main()
  13   {
  14
  15 #if BOOST_PP_VARIADICS
  16
  17   #define DATA
  18   #define OBJECT OBJECT2
  19   #define OBJECT2
  20   #define FUNC(x) FUNC2(x)
  21   #define FUNC2(x)
  22
  23   BOOST_TEST(BOOST_VMD_IS_EMPTY(BOOST_PP_EMPTY()));
  24   BOOST_TEST(BOOST_VMD_IS_EMPTY(DATA BOOST_PP_EMPTY()));
  25   BOOST_TEST(!BOOST_VMD_IS_EMPTY(x BOOST_PP_EMPTY()));
  26   BOOST_TEST(BOOST_VMD_IS_EMPTY(OBJECT BOOST_PP_EMPTY()));
  27   BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC(z) BOOST_PP_EMPTY()));
  28
  29   #define FUNC_GEN() ()
  30   #define FUNC_GEN2(x) ()
  31   #define FUNC_GEN3() anything
  32   #define FUNC_GEN4(x) anything
  33
  34 #if BOOST_PP_VARIADIC_HAS_OPT()
  35
  36   #define FUNC_GEN5(x,y) ()
  37   #define FUNC_GEN6(x,y) anything
  38   #define FUNC_GEN7() (y,z)
  39   #define FUNC_GEN5A() (&)
  40   #define FUNC_GEN6A(x) (y)
  41   #define FUNC_GEN7A() (y,z)
  42
  43   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN));
  44   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN2));
  45
  46   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN5));
  47   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6));
  48   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN7));
  49
  50   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN5A));
  51   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6A));
  52   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN7A));
  53
  54 #elif BOOST_VMD_MSVC
  55
  56   #define FUNC_GEN5(x,y) ()
  57   #define FUNC_GEN6(x,y) anything
  58
  59   /* This shows that VC++ does not work correctly in these cases. */
  60
  61   BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC_GEN));  /* This produces the wrong result */
  62   BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC_GEN2)); /* This produces the wrong result */
  63
  64   BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC_GEN5));  /* This should produce a compiler error but does not and produces the incorrect result */
  65   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6)); /* This should produce a compiler error but does not */
  66
  67 #else
  68
  69   #define FUNC_GEN5() (&)
  70   #define FUNC_GEN6(x) (y)
  71   #define FUNC_GEN7() (y,z)
  72
  73   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN));
  74   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN2));
  75
  76   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN5));
  77   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6));
  78   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN7));
  79
  80 #endif /* BOOST_VMD_MSVC */
  81
  82   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN3));
  83   BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN4));
  84
  85 #else
  86
  87 BOOST_ERROR("No variadic macro support");
  88
  89 #endif /* BOOST_PP_VARIADICS */
  90
  91   return boost::report_errors();
  92
  93   }