1/* Unit testing for outcomes
2(C) 2013-2024 Niall Douglas <http://www.nedproductions.biz/> (7 commits)
3
4
5Boost Software License - Version 1.0 - August 17th, 2003
6
7Permission is hereby granted, free of charge, to any person or organization
8obtaining a copy of the software and accompanying documentation covered by
9this license (the "Software") to use, reproduce, display, distribute,
10execute, and transmit the Software, and to prepare derivative works of the
11Software, and to permit third-parties to whom the Software is furnished to
12do so, all subject to the following:
13
14The copyright notices in the Software and this entire statement, including
15the above license grant, this restriction and the following disclaimer,
16must be included in all copies of the Software, in whole or in part, and
17all derivative works of the Software, unless such copies or derivative
18works are solely in the form of machine-executable object code generated by
19a source language processor.
20
21THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
24SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
25FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
26ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27DEALINGS IN THE SOFTWARE.
28*/
29
30#ifdef _MSC_VER
31#pragma warning(disable : 4702) // unreachable code
32#endif
33
34#include <boost/outcome.hpp>
35#include <boost/test/unit_test.hpp>
36#include <boost/test/unit_test_monitor.hpp>
37
38BOOST_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}
155

source code of boost/libs/outcome/test/tests/udts.cpp