| 1 | |
|---|---|
| 2 | // Copyright 2019 Peter Dimov |
| 3 | // |
| 4 | // Distributed under the Boost Software License, Version 1.0. |
| 5 | // |
| 6 | // See accompanying file LICENSE_1_0.txt or copy at |
| 7 | // http://www.boost.org/LICENSE_1_0.txt |
| 8 | |
| 9 | #if defined(_MSC_VER) |
| 10 | # pragma warning( disable: 4702 ) // unreachable code |
| 11 | #endif |
| 12 | |
| 13 | #include <boost/variant2/variant.hpp> |
| 14 | #include <boost/core/lightweight_test.hpp> |
| 15 | #include <stdexcept> |
| 16 | |
| 17 | using namespace boost::variant2; |
| 18 | |
| 19 | struct X |
| 20 | { |
| 21 | static int instances; |
| 22 | |
| 23 | X() |
| 24 | { |
| 25 | ++instances; |
| 26 | } |
| 27 | |
| 28 | X( X const& ) |
| 29 | { |
| 30 | throw std::runtime_error( "X(X const&)"); |
| 31 | } |
| 32 | |
| 33 | ~X() |
| 34 | { |
| 35 | --instances; |
| 36 | } |
| 37 | }; |
| 38 | |
| 39 | int X::instances = 0; |
| 40 | |
| 41 | void test() |
| 42 | { |
| 43 | X::instances = 0; |
| 44 | |
| 45 | { |
| 46 | variant<X> v1; |
| 47 | |
| 48 | BOOST_TEST_EQ( X::instances, 1 ); |
| 49 | |
| 50 | try |
| 51 | { |
| 52 | variant<X> v2( std::move( v1 ) ); |
| 53 | BOOST_TEST_EQ( X::instances, 2 ); |
| 54 | } |
| 55 | catch( std::exception const& ) |
| 56 | { |
| 57 | } |
| 58 | |
| 59 | BOOST_TEST_EQ( X::instances, 1 ); |
| 60 | } |
| 61 | |
| 62 | BOOST_TEST_EQ( X::instances, 0 ); |
| 63 | } |
| 64 | |
| 65 | int main() |
| 66 | { |
| 67 | test(); |
| 68 | return boost::report_errors(); |
| 69 | } |
| 70 |