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- // Copyright 2019 Peter Dimov
- //
- // Distributed under the Boost Software License, Version 1.0.
- //
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- #if defined(_MSC_VER)
- # pragma warning( disable: 4702 ) // unreachable code
- #endif
- #include <boost/variant2/variant.hpp>
- #include <boost/core/lightweight_test.hpp>
- #include <stdexcept>
- using namespace boost::variant2;
- struct X
- {
- static int instances;
- X()
- {
- ++instances;
- }
- X( X const& )
- {
- throw std::runtime_error( "X(X const&)" );
- }
- ~X()
- {
- --instances;
- }
- };
- int X::instances = 0;
- void test_copy()
- {
- X::instances = 0;
- {
- variant<X> v1;
- BOOST_TEST_EQ( X::instances, 1 );
- try
- {
- variant<X, int, float> v2( v1 );
- BOOST_TEST_EQ( X::instances, 2 );
- }
- catch( std::exception const& )
- {
- }
- BOOST_TEST_EQ( X::instances, 1 );
- }
- BOOST_TEST_EQ( X::instances, 0 );
- }
- void test_move()
- {
- X::instances = 0;
- {
- variant<X> v1;
- BOOST_TEST_EQ( X::instances, 1 );
- try
- {
- variant<X, int, float> v2( std::move( v1 ) );
- BOOST_TEST_EQ( X::instances, 2 );
- }
- catch( std::exception const& )
- {
- }
- BOOST_TEST_EQ( X::instances, 1 );
- }
- BOOST_TEST_EQ( X::instances, 0 );
- }
- int main()
- {
- test_copy();
- test_move();
- return boost::report_errors();
- }
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