ceph/src/boost/libs/leaf/test/accumulate_nested_error_exception_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/on_error.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 template <int>
  27 struct info
  28 {
  29     int value;
  30 };
  31
  32 void f0()
  33 {
  34     auto load = leaf::on_error( []( info<0> & ) { } );
  35     throw leaf::exception(info<2>{2});
  36 }
  37
  38 void f1()
  39 {
  40     auto load = leaf::on_error( info<0>{-1}, info<2>{-1}, []( info<1> & x ) {++x.value;} );
  41     f0();
  42 }
  43
  44 void f2()
  45 {
  46     try
  47     {
  48         f1();
  49     }
  50     catch( leaf::error_id const & err )
  51     {
  52         err.load( info<3>{3} );
  53         throw;
  54     }
  55 }
  56
  57 int main()
  58 {
  59     int r = leaf::try_catch(
  60         []
  61         {
  62             f2();
  63             return 0;
  64         },
  65         []( info<0> i0, info<1> i1, info<2> i2, info<3> i3 )
  66         {
  67             BOOST_TEST_EQ(i0.value, 0);
  68             BOOST_TEST_EQ(i1.value, 1);
  69             BOOST_TEST_EQ(i2.value, 2);
  70             BOOST_TEST_EQ(i3.value, 3);
  71             return 1;
  72         },
  73         []
  74         {
  75             return 2;
  76         } );
  77     BOOST_TEST_EQ(r, 1);
  78
  79     return boost::report_errors();
  80 }
  81
  82 #endif