1 /* Unit testing for outcomes 2 (C) 2013-2020 Niall Douglas <http://www.nedproductions.biz/> (5 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 #include <boost/outcome/outcome.hpp> 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(issues_0007_test, "BOOST_OUTCOME_TRYV(expr) in a function whose return outcome's type has no default constructor fails to compile") 36 { 37 using namespace BOOST_OUTCOME_V2_NAMESPACE; 38 struct udt // NOLINT 39 { udtudt40 explicit udt(int /*unused*/) {} 41 // udt() = delete; 42 udt(const udt &) = default; 43 udt(udt &&) = default; 44 }; 45 { __anon32c37a900102() 46 auto f = []() -> result<udt> { 47 auto g = [] { return result<int>(5); }; 48 /* This fails because BOOST_OUTCOME_TRYV() returns a result<void> 49 which if it were valued void, would implicitly convert into a 50 default constructed udt which is not possible, hence the compile error. 51 */ 52 BOOST_OUTCOME_TRYV(g()); 53 return udt(5); 54 }; 55 (void) f(); 56 } 57 { __anon32c37a900302() 58 auto f = []() -> outcome<udt> { 59 auto g = [] { return outcome<int>(5); }; 60 /* This fails because BOOST_OUTCOME_TRYV() returns a result<void> 61 which if it were valued void, would implicitly convert into a 62 default constructed udt which is not possible, hence the compile error. 63 */ 64 BOOST_OUTCOME_TRYV(g()); 65 return udt(5); 66 }; 67 (void) f(); 68 } 69 { __anon32c37a900502() 70 auto f = []() -> outcome<udt> { 71 auto g = [] { return result<int>(5); }; 72 /* This fails because BOOST_OUTCOME_TRYV() returns a result<void> 73 which if it were valued void, would implicitly convert into a 74 default constructed udt which is not possible, hence the compile error. 75 */ 76 BOOST_OUTCOME_TRYV(g()); 77 return udt(5); 78 }; 79 (void) f(); 80 } 81 } 82