ceph/src/boost/libs/leaf/test/capture_exception_state_test.cpp

   1 // Copyright (c) 2018-2020 Emil Dotchevski and Reverge Studios, Inc.
   2
   3 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <boost/leaf/detail/config.hpp>
   7 #ifdef BOOST_LEAF_NO_EXCEPTIONS
   8
   9 #include <iostream>
  10
  11 int main()
  12 {
  13     std::cout << "Unit test not applicable." << std::endl;
  14     return 0;
  15 }
  16
  17 #else
  18
  19 #include <boost/leaf/capture.hpp>
  20 #include <boost/leaf/handle_errors.hpp>
  21 #include <boost/leaf/exception.hpp>
  22 #include "lightweight_test.hpp"
  23
  24 namespace leaf = boost::leaf;
  25
  26 int count = 0;
  27
  28 template <int>
  29 struct info
  30 {
  31     info() noexcept
  32     {
  33         ++count;
  34     }
  35
  36     info( info const & ) noexcept
  37     {
  38         ++count;
  39     }
  40
  41     ~info() noexcept
  42     {
  43         --count;
  44     }
  45 };
  46
  47 int main()
  48 {
  49     auto error_handlers = std::make_tuple(
  50         []( info<1>, info<3> )
  51         {
  52             return 1;
  53         },
  54         []
  55         {
  56             return 2;
  57         } );
  58     BOOST_TEST_EQ(count, 0);
  59     std::exception_ptr ep;
  60     try
  61     {
  62         leaf::capture(
  63             leaf::make_shared_context(error_handlers),
  64             []
  65             {
  66                 throw leaf::exception(info<1>{}, info<3>{});
  67             } );
  68         BOOST_TEST(false);
  69     }
  70     catch(...)
  71     {
  72         ep = std::current_exception();
  73     }
  74     BOOST_TEST_EQ(count, 2);
  75     int r = leaf::try_catch(
  76         [&]() -> int
  77         {
  78             std::rethrow_exception(ep);
  79         },
  80         error_handlers );
  81     BOOST_TEST_EQ(r, 1);
  82     ep = std::exception_ptr();
  83     BOOST_TEST_EQ(count, 0);
  84     return boost::report_errors();
  85 }
  86
  87 #endif