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92f5a8d4 | 1 | /* Unit testing for outcomes |
1e59de90 | 2 | (C) 2013-2022 Niall Douglas <http://www.nedproductions.biz/> (7 commits) |
92f5a8d4 TL |
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 | ||
1e59de90 | 30 | #include <boost/outcome.hpp> |
92f5a8d4 TL |
31 | #include <boost/outcome/try.hpp> |
32 | #include <boost/test/unit_test.hpp> | |
33 | #include <boost/test/unit_test_monitor.hpp> | |
34 | ||
35 | BOOST_OUTCOME_AUTO_TEST_CASE(works_outcome_propagate, "Tests that the outcome propagates errors between different editions of itself") | |
36 | { | |
37 | using namespace BOOST_OUTCOME_V2_NAMESPACE; | |
38 | { | |
39 | auto t0 = [&](int a) { return result<long>(boost::system::error_code(a, boost::system::generic_category())); }; | |
40 | auto t1 = [&](int a) { | |
41 | result<double> f(t0(a)); // double is constructible from long | |
42 | BOOST_CHECK(!f.has_value()); | |
43 | BOOST_CHECK(f.has_error()); | |
44 | return f; | |
45 | }; | |
46 | auto t2 = [&](int a) { | |
47 | result<void> f(t1(a).error()); | |
48 | BOOST_CHECK(!f.has_value()); | |
49 | BOOST_CHECK(f.has_error()); | |
50 | return f; | |
51 | }; | |
52 | auto t3 = [&](int a) { | |
53 | outcome<std::string> f(t2(a)); | |
54 | BOOST_CHECK(!f.has_value()); | |
55 | BOOST_CHECK(f.has_error()); | |
56 | return f; | |
57 | }; | |
58 | BOOST_CHECK(t3(5).error().value() == 5); | |
59 | result<int> a2{result<void>(in_place_type<void>)}; | |
60 | result<int> a3{result<void>(boost::system::error_code(5, boost::system::generic_category()))}; | |
61 | BOOST_CHECK(a2.has_value()); | |
62 | BOOST_CHECK(!a2.has_error()); | |
63 | BOOST_CHECK(!a3.has_value()); | |
64 | BOOST_CHECK(a3.has_error()); | |
65 | } | |
66 | { | |
67 | auto t0 = [&](int a) { return result<long>(a); }; | |
68 | auto t1 = [&](int a) -> result<std::string> { | |
1e59de90 | 69 | BOOST_OUTCOME_TRY(auto &&f, (t0(a))); |
92f5a8d4 TL |
70 | return std::to_string(f); |
71 | }; | |
72 | BOOST_CHECK(t1(5).value() == "5"); | |
73 | } | |
74 | { | |
75 | auto t0 = [&](int a) { return result<long>(a); }; | |
76 | auto t1 = [&](int a) -> outcome<std::string> { | |
1e59de90 | 77 | BOOST_OUTCOME_TRY(auto &&f, (t0(a))); |
92f5a8d4 TL |
78 | return std::to_string(f); |
79 | }; | |
80 | BOOST_CHECK(t1(5).value() == "5"); | |
81 | } | |
82 | { | |
83 | auto t0 = [&](int a) -> result<long> { return result<long>(a); }; | |
84 | auto t1 = [&](int a) -> outcome<void> { | |
85 | BOOST_OUTCOME_TRY((t0(a))); | |
86 | return outcome<void>(in_place_type<void>); | |
87 | }; | |
88 | (void) t1(5); | |
89 | } | |
90 | } |