ceph/src/boost/libs/core/test/uncaught_exceptions_np.cpp

   1 /*
   2  *             Copyright Andrey Semashev 2018.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          https://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   uncaught_exceptions_np.cpp
   9  * \author Andrey Semashev
  10  * \date   2018-11-10
  11  *
  12  * \brief  This file contains tests for the uncaught_exceptions function.
  13  *
  14  * This file contains checks that are compiler specific and not quite portable or require C++17.
  15  */
  16
  17 #include <boost/core/uncaught_exceptions.hpp>
  18
  19 #if !defined(BOOST_CORE_UNCAUGHT_EXCEPTIONS_EMULATED)
  20
  21 #include <boost/core/lightweight_test.hpp>
  22
  23 #if defined(_MSC_VER)
  24 # pragma warning(disable: 4512) // assignment operator could not be generated
  25 #endif
  26
  27 struct my_exception1 {};
  28 struct my_exception2 {};
  29
  30 class exception_watcher2
  31 {
  32     unsigned int& m_count;
  33
  34 public:
  35     explicit exception_watcher2(unsigned int& count) : m_count(count) {}
  36     ~exception_watcher2() { m_count = boost::core::uncaught_exceptions(); }
  37 };
  38
  39 class exception_watcher1
  40 {
  41     unsigned int& m_count1;
  42     unsigned int& m_count2;
  43
  44 public:
  45     exception_watcher1(unsigned int& count1, unsigned int& count2) : m_count1(count1), m_count2(count2) {}
  46     ~exception_watcher1()
  47     {
  48         m_count1 = boost::core::uncaught_exceptions();
  49         try
  50         {
  51             exception_watcher2 watcher2(m_count2);
  52             throw my_exception2();
  53         }
  54         catch (...)
  55         {
  56         }
  57     }
  58 };
  59
  60 // Tests for uncaught_exceptions when used in nested destructors while an exception propagates
  61 void test_in_nested_destructors()
  62 {
  63     const unsigned int root_count = boost::core::uncaught_exceptions();
  64
  65     unsigned int level1_count = root_count, level2_count = root_count;
  66     try
  67     {
  68         exception_watcher1 watcher1(level1_count, level2_count);
  69         throw my_exception1();
  70     }
  71     catch (...)
  72     {
  73     }
  74
  75     BOOST_TEST_NE(root_count, level1_count);
  76     BOOST_TEST_NE(root_count, level2_count);
  77     BOOST_TEST_NE(level1_count, level2_count);
  78 }
  79
  80 int main()
  81 {
  82     test_in_nested_destructors();
  83
  84     return boost::report_errors();
  85 }
  86
  87 #else
  88
  89 int main()
  90 {
  91     return 0;
  92 }
  93
  94 #endif