ceph/src/boost/libs/outcome/test/tests/udts.cpp

   1 /* Unit testing for outcomes
   2 (C) 2013-2020 Niall Douglas <http://www.nedproductions.biz/> (7 commits)
   3
   4
   5 Boost Software License - Version 1.0 - August 17th, 2003
   6
   7 Permission is hereby granted, free of charge, to any person or organization
   8 obtaining a copy of the software and accompanying documentation covered by
   9 this license (the "Software") to use, reproduce, display, distribute,
  10 execute, and transmit the Software, and to prepare derivative works of the
  11 Software, and to permit third-parties to whom the Software is furnished to
  12 do so, all subject to the following:
  13
  14 The copyright notices in the Software and this entire statement, including
  15 the above license grant, this restriction and the following disclaimer,
  16 must be included in all copies of the Software, in whole or in part, and
  17 all derivative works of the Software, unless such copies or derivative
  18 works are solely in the form of machine-executable object code generated by
  19 a source language processor.
  20
  21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23 FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  24 SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  25 FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  26 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  27 DEALINGS IN THE SOFTWARE.
  28 */
  29
  30 #ifdef _MSC_VER
  31 #pragma warning(disable : 4702)  // unreachable code
  32 #endif
  33
  34 #include <boost/outcome/outcome.hpp>
  35 #include <boost/test/unit_test.hpp>
  36 #include <boost/test/unit_test_monitor.hpp>
  37
  38 BOOST_OUTCOME_AUTO_TEST_CASE(works_outcome_udts, "Tests that the outcome works as intended with user-defined types")
  39 {
  40   using namespace BOOST_OUTCOME_V2_NAMESPACE;
  41   // No default constructor, no copy/move, no assignment
  42   {
  43     struct udt
  44     {
  45       int a;
  46       explicit udt(int _a)
  47           : a(_a)
  48       {
  49       }
  50       udt() = delete;
  51       udt(const udt &) = delete;
  52       udt(udt &&) = delete;
  53       udt &operator=(const udt &) = delete;
  54       udt &operator=(udt &&) = delete;
  55       ~udt() = default;
  56     };
  57     outcome<udt> foo(in_place_type<udt>, 5);
  58     BOOST_CHECK(5 == foo.value().a);
  59   }
  60 #ifndef BOOST_NO_EXCEPTIONS
  61   // Emplace construct, throws during move and copy
  62   {
  63     struct udt
  64     {
  65       std::string a;
  66       explicit udt(std::string _a)
  67           : a(std::move(_a))
  68       {
  69       }
  70       udt() = delete;
  71       udt(const udt & /*unused*/) { throw std::logic_error("copy"); }
  72       udt(udt && /*unused*/) noexcept(false) { throw std::logic_error("move"); }  // NOLINT
  73       udt &operator=(const udt & /*unused*/) { throw std::logic_error("copy"); }
  74       udt &operator=(udt && /*unused*/) noexcept(false) { throw std::logic_error("move"); }  // NOLINT
  75       ~udt() { a.clear(); }
  76     };
  77     static_assert(!std::is_default_constructible<udt>::value, "udt is default constructible");
  78     static_assert(std::is_copy_constructible<udt>::value, "udt is not copy constructible");
  79     static_assert(std::is_move_constructible<udt>::value, "udt is not move constructible");
  80     static_assert(!std::is_default_constructible<outcome<udt>>::value, "outcome<udt> is default constructible");
  81     static_assert(std::is_copy_constructible<outcome<udt>>::value, "outcome<udt> is not copy constructible");
  82     static_assert(std::is_move_constructible<outcome<udt>>::value, "outcome<udt> is not move constructible");
  83     // Emplace constructs
  84     outcome<udt> foo(in_place_type<udt>, "niall");
  85     BOOST_CHECK("niall" == foo.value().a);
  86     try
  87     {
  88       auto foo2(foo);  // NOLINT
  89       BOOST_CHECK(false);
  90     }
  91     catch(const std::logic_error &e)
  92     {
  93       BOOST_CHECK(!strcmp(e.what(), "copy"));
  94     }
  95     catch(...)
  96     {
  97       BOOST_CHECK(false);
  98     }
  99     BOOST_CHECK("niall" == foo.value().a);
 100     try
 101     {
 102       auto foo2(std::move(foo));
 103       BOOST_CHECK(false);
 104     }
 105     catch(const std::logic_error &e)
 106     {
 107       BOOST_CHECK(!strcmp(e.what(), "move"));
 108     }
 109     catch(...)
 110     {
 111       BOOST_CHECK(false);
 112     }
 113     BOOST_CHECK("niall" == foo.value().a);  // NOLINT
 114     // Does throwing during copy assignment work?
 115     {
 116       outcome<udt> foo2(in_place_type<udt>, "douglas");
 117       try
 118       {
 119         foo2 = foo;
 120         BOOST_CHECK(false);
 121       }
 122       catch(const std::logic_error &e)
 123       {
 124         BOOST_CHECK(!strcmp(e.what(), "copy"));
 125         BOOST_CHECK(foo2.value().a == "douglas");
 126       }
 127       catch(...)
 128       {
 129         BOOST_CHECK(false);
 130       }
 131       BOOST_CHECK("niall" == foo.value().a);
 132     }
 133     // Does throwing during move assignment work?
 134     {
 135       outcome<udt> foo2(in_place_type<udt>, "douglas");
 136       try
 137       {
 138         foo2 = std::move(foo);
 139         BOOST_CHECK(false);
 140       }
 141       catch(const std::logic_error &e)
 142       {
 143         BOOST_CHECK(!strcmp(e.what(), "move"));
 144         BOOST_CHECK(foo2.value().a == "douglas");
 145       }
 146       catch(...)
 147       {
 148         BOOST_CHECK(false);
 149       }
 150       BOOST_CHECK("niall" == foo.value().a);  // NOLINT
 151     }
 152   }
 153 #endif
 154 }