ceph/src/boost/libs/stacktrace/test/test_void_ptr_cast.cpp

   1 // Copyright 2017 Antony Polukhin.
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <boost/stacktrace/detail/void_ptr_cast.hpp>
   8
   9 #include <boost/core/lightweight_test.hpp>
  10
  11 int foo1_func(int) { return 0; }
  12 void foo2_func(int, int, ...) {}
  13
  14 struct test_struct {
  15     int foo1_memb(int) const { return 0; }
  16     void foo2_memb(int, int, ...) {}
  17 };
  18
  19 template <class F1, class F2>
  20 void test(F1 foo1, F2 foo2) {
  21     using boost::stacktrace::detail::void_ptr_cast;
  22
  23     typedef void(*void_f_ptr)();
  24
  25     // Function/variable to void(*)()
  26     void_f_ptr fp1 = void_ptr_cast<void_f_ptr>(foo1);
  27     void_f_ptr fp2 = void_ptr_cast<void_f_ptr>(foo2);
  28     BOOST_TEST(fp1);
  29     BOOST_TEST(fp2);
  30     BOOST_TEST(fp1 != fp2);
  31
  32     // Function/variable to void*
  33     void* vp1 = void_ptr_cast<void*>(foo1);
  34     void* vp2 = void_ptr_cast<void*>(foo2);
  35     BOOST_TEST(vp1);
  36     BOOST_TEST(vp2);
  37     BOOST_TEST(vp1 != vp2);
  38
  39     // void* to void(*)()
  40     void_f_ptr fp1_2 = void_ptr_cast<void_f_ptr>(vp1);
  41     void_f_ptr fp2_2 = void_ptr_cast<void_f_ptr>(vp2);
  42     BOOST_TEST(fp1_2);
  43     BOOST_TEST(fp2_2);
  44     BOOST_TEST(fp1_2 != fp2_2);
  45     BOOST_TEST(fp1 == fp1_2);
  46     BOOST_TEST(fp2 == fp2_2);
  47
  48     // void(*)() to void*
  49     BOOST_TEST(void_ptr_cast<void*>(fp1) == vp1);
  50     BOOST_TEST(void_ptr_cast<void*>(fp2) == vp2);
  51
  52     // void(*)() to function/variable
  53     BOOST_TEST(void_ptr_cast<F1>(fp1) == foo1);
  54     BOOST_TEST(void_ptr_cast<F2>(fp2) == foo2);
  55
  56     // void* to function/variable
  57     BOOST_TEST(void_ptr_cast<F1>(vp1) == foo1);
  58     BOOST_TEST(void_ptr_cast<F2>(vp2) == foo2);
  59 }
  60
  61 int main() {
  62     // Testing for functions
  63     test(foo1_func, foo2_func);
  64
  65     typedef void(func_t)();
  66     test(
  67         boost::stacktrace::detail::void_ptr_cast<func_t* const>(foo1_func),
  68         boost::stacktrace::detail::void_ptr_cast<func_t* const>(foo2_func)
  69     );
  70
  71     // Testing for variables (just in case...)
  72     int i = 0;
  73     double j= 1;
  74     test(&i, &j);
  75
  76
  77
  78     return boost::report_errors();
  79 }