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

   1 // Copyright 2018-2022 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/config.hpp>
   7
   8 #if defined(BOOST_LEAF_NO_EXCEPTIONS) || !BOOST_LEAF_CFG_CAPTURE
   9
  10 #include <iostream>
  11
  12 int main()
  13 {
  14     std::cout << "Unit test not applicable." << std::endl;
  15     return 0;
  16 }
  17
  18 #else
  19
  20 #ifdef BOOST_LEAF_TEST_SINGLE_HEADER
  21 #   include "leaf.hpp"
  22 #else
  23 #   include <boost/leaf/capture.hpp>
  24 #   include <boost/leaf/handle_errors.hpp>
  25 #   include <boost/leaf/exception.hpp>
  26 #endif
  27
  28 #include "lightweight_test.hpp"
  29
  30 namespace leaf = boost::leaf;
  31
  32 int count = 0;
  33
  34 template <int>
  35 struct info
  36 {
  37     info() noexcept
  38     {
  39         ++count;
  40     }
  41
  42     info( info const & ) noexcept
  43     {
  44         ++count;
  45     }
  46
  47     ~info() noexcept
  48     {
  49         --count;
  50     }
  51 };
  52
  53 int main()
  54 {
  55     auto error_handlers = std::make_tuple(
  56         []( info<1>, info<3> )
  57         {
  58             return 1;
  59         },
  60         []
  61         {
  62             return 2;
  63         } );
  64     BOOST_TEST_EQ(count, 0);
  65     std::exception_ptr ep;
  66     try
  67     {
  68         leaf::capture(
  69             leaf::make_shared_context(error_handlers),
  70             []
  71             {
  72                 throw leaf::exception(info<1>{}, info<3>{});
  73             } );
  74         BOOST_TEST(false);
  75     }
  76     catch(...)
  77     {
  78         ep = std::current_exception();
  79     }
  80     BOOST_TEST_EQ(count, 2);
  81     int r = leaf::try_catch(
  82         [&]() -> int
  83         {
  84             std::rethrow_exception(ep);
  85         },
  86         error_handlers );
  87     BOOST_TEST_EQ(r, 1);
  88     ep = std::exception_ptr();
  89     BOOST_TEST_EQ(count, 0);
  90     return boost::report_errors();
  91 }
  92
  93 #endif