ceph/src/boost/libs/leaf/test/defer_nested_new_error_exception_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 #ifdef BOOST_LEAF_NO_EXCEPTIONS
   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/on_error.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 template <int A>
  33 struct info
  34 {
  35     int value;
  36 };
  37
  38 void f0()
  39 {
  40     auto load = leaf::on_error( [] { return info<0>{-1}; } );
  41     throw leaf::exception(info<1>{-1});
  42 }
  43
  44 void f1()
  45 {
  46     auto load = leaf::on_error( [] { return info<0>{0}; }, [] { return info<1>{1}; }, [] { return info<2>{2}; } );
  47     try { f0(); } catch(...) { }
  48     throw leaf::exception();
  49 }
  50
  51 leaf::error_id f2()
  52 {
  53     try
  54     {
  55         f1();
  56         BOOST_TEST(false);
  57     }
  58     catch( leaf::error_id const & err )
  59     {
  60         err.load( info<3>{3} );
  61         throw;
  62     }
  63     catch(...)
  64     {
  65         BOOST_TEST(false);
  66     }
  67     return leaf::new_error();
  68 }
  69
  70 int main()
  71 {
  72     int r = leaf::try_catch(
  73         []
  74         {
  75             f2();
  76             return 0;
  77         },
  78         []( info<0> i0, info<1> i1, info<2> i2, info<3> i3 )
  79         {
  80             BOOST_TEST_EQ(i0.value, 0);
  81             BOOST_TEST_EQ(i1.value, 1);
  82             BOOST_TEST_EQ(i2.value, 2);
  83             BOOST_TEST_EQ(i3.value, 3);
  84             return 1;
  85         },
  86         []
  87         {
  88             return 2;
  89         } );
  90     BOOST_TEST_EQ(r, 1);
  91
  92     return boost::report_errors();
  93 }
  94
  95 #endif