123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778 |
- // Copyright 2017 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
- #include <boost/variant2/variant.hpp>
- #include <boost/core/lightweight_test.hpp>
- #include <string>
- using namespace boost::variant2;
- int main()
- {
- {
- variant<int> v;
- BOOST_TEST( holds_alternative<int>( v ) );
- }
- {
- variant<int, float> v;
- BOOST_TEST( holds_alternative<int>( v ) );
- BOOST_TEST( !holds_alternative<float>( v ) );
- }
- {
- variant<int, float> v( 3.14f );
- BOOST_TEST( !holds_alternative<int>( v ) );
- BOOST_TEST( holds_alternative<float>( v ) );
- }
- {
- variant<int, float, float> v;
- BOOST_TEST( holds_alternative<int>( v ) );
- }
- {
- variant<int, int, float> v( 3.14f );
- BOOST_TEST( holds_alternative<float>( v ) );
- }
- {
- variant<int, float, std::string> v;
- BOOST_TEST( holds_alternative<int>( v ) );
- BOOST_TEST( !holds_alternative<float>( v ) );
- BOOST_TEST( !holds_alternative<std::string>( v ) );
- }
- {
- variant<int, float, std::string> v( 3.14f );
- BOOST_TEST( !holds_alternative<int>( v ) );
- BOOST_TEST( holds_alternative<float>( v ) );
- BOOST_TEST( !holds_alternative<std::string>( v ) );
- }
- {
- variant<int, float, std::string> v( "text" );
- BOOST_TEST( !holds_alternative<int>( v ) );
- BOOST_TEST( !holds_alternative<float>( v ) );
- BOOST_TEST( holds_alternative<std::string>( v ) );
- }
- {
- variant<int, int, float, std::string> v( 3.14f );
- BOOST_TEST( holds_alternative<float>( v ) );
- BOOST_TEST( !holds_alternative<std::string>( v ) );
- }
- {
- variant<int, int, float, std::string> v( "text" );
- BOOST_TEST( !holds_alternative<float>( v ) );
- BOOST_TEST( holds_alternative<std::string>( v ) );
- }
- return boost::report_errors();
- }
|