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- /* Unit testing for outcomes
- (C) 2013-2019 Niall Douglas <http://www.nedproductions.biz/> (7 commits)
- Boost Software License - Version 1.0 - August 17th, 2003
- Permission is hereby granted, free of charge, to any person or organization
- obtaining a copy of the software and accompanying documentation covered by
- this license (the "Software") to use, reproduce, display, distribute,
- execute, and transmit the Software, and to prepare derivative works of the
- Software, and to permit third-parties to whom the Software is furnished to
- do so, all subject to the following:
- The copyright notices in the Software and this entire statement, including
- the above license grant, this restriction and the following disclaimer,
- must be included in all copies of the Software, in whole or in part, and
- all derivative works of the Software, unless such copies or derivative
- works are solely in the form of machine-executable object code generated by
- a source language processor.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
- SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
- FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
- ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- DEALINGS IN THE SOFTWARE.
- */
- #include <boost/outcome/outcome.hpp>
- #include <boost/outcome/try.hpp>
- #include <boost/test/unit_test.hpp>
- #include <boost/test/unit_test_monitor.hpp>
- BOOST_OUTCOME_AUTO_TEST_CASE(works_outcome_propagate, "Tests that the outcome propagates errors between different editions of itself")
- {
- using namespace BOOST_OUTCOME_V2_NAMESPACE;
- {
- auto t0 = [&](int a) { return result<long>(boost::system::error_code(a, boost::system::generic_category())); };
- auto t1 = [&](int a) {
- result<double> f(t0(a)); // double is constructible from long
- BOOST_CHECK(!f.has_value());
- BOOST_CHECK(f.has_error());
- return f;
- };
- auto t2 = [&](int a) {
- result<void> f(t1(a).error());
- BOOST_CHECK(!f.has_value());
- BOOST_CHECK(f.has_error());
- return f;
- };
- auto t3 = [&](int a) {
- outcome<std::string> f(t2(a));
- BOOST_CHECK(!f.has_value());
- BOOST_CHECK(f.has_error());
- return f;
- };
- BOOST_CHECK(t3(5).error().value() == 5);
- result<int> a2{result<void>(in_place_type<void>)};
- result<int> a3{result<void>(boost::system::error_code(5, boost::system::generic_category()))};
- BOOST_CHECK(a2.has_value());
- BOOST_CHECK(!a2.has_error());
- BOOST_CHECK(!a3.has_value());
- BOOST_CHECK(a3.has_error());
- }
- {
- auto t0 = [&](int a) { return result<long>(a); };
- auto t1 = [&](int a) -> result<std::string> {
- BOOST_OUTCOME_TRY(f, (t0(a)));
- return std::to_string(f);
- };
- BOOST_CHECK(t1(5).value() == "5");
- }
- {
- auto t0 = [&](int a) { return result<long>(a); };
- auto t1 = [&](int a) -> outcome<std::string> {
- BOOST_OUTCOME_TRY(f, (t0(a)));
- return std::to_string(f);
- };
- BOOST_CHECK(t1(5).value() == "5");
- }
- {
- auto t0 = [&](int a) -> result<long> { return result<long>(a); };
- auto t1 = [&](int a) -> outcome<void> {
- BOOST_OUTCOME_TRY((t0(a)));
- return outcome<void>(in_place_type<void>);
- };
- (void) t1(5);
- }
- }
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