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- // 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 <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- #include <utility>
- #include <string>
- using namespace boost::variant2;
- struct X
- {
- X() = default;
- X( in_place_index_t<0> ) = delete;
- };
- int main()
- {
- {
- variant<int> v( in_place_index_t<0>{} );
- BOOST_TEST_EQ( v.index(), 0 );
- BOOST_TEST_EQ( get<0>(v), 0 );
- }
- {
- variant<X> v( in_place_index_t<0>{} );
- BOOST_TEST_EQ( v.index(), 0 );
- }
- {
- variant<int> v( in_place_index_t<0>{}, 1 );
- BOOST_TEST_EQ( v.index(), 0 );
- BOOST_TEST_EQ( get<0>(v), 1 );
- }
- {
- variant<int, float> v( in_place_index_t<0>{} );
- BOOST_TEST_EQ( v.index(), 0 );
- BOOST_TEST_EQ( get<0>(v), 0 );
- }
- {
- variant<int, float> v( in_place_index_t<0>{}, 1 );
- BOOST_TEST_EQ( v.index(), 0 );
- BOOST_TEST_EQ( get<0>(v), 1 );
- }
- {
- variant<int, float> v( in_place_index_t<1>{} );
- BOOST_TEST_EQ( v.index(), 1 );
- BOOST_TEST_EQ( get<1>(v), 0 );
- }
- {
- variant<int, float> v( in_place_index_t<1>{}, 3.14f );
- BOOST_TEST_EQ( v.index(), 1 );
- BOOST_TEST_EQ( get<1>(v), 3.14f );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<0>{}, 1 );
- BOOST_TEST_EQ( v.index(), 0 );
- BOOST_TEST_EQ( get<0>(v), 1 );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<1>{}, 1 );
- BOOST_TEST_EQ( v.index(), 1 );
- BOOST_TEST_EQ( get<1>(v), 1 );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<2>{}, 3.14f );
- BOOST_TEST_EQ( v.index(), 2 );
- BOOST_TEST_EQ( get<2>(v), 3.14f );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<3>{}, 3.14f );
- BOOST_TEST_EQ( v.index(), 3 );
- BOOST_TEST_EQ( get<3>(v), 3.14f );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<4>{}, "text" );
- BOOST_TEST_EQ( v.index(), 4 );
- BOOST_TEST_EQ( get<4>(v), std::string("text") );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<5>{}, "text" );
- BOOST_TEST_EQ( v.index(), 5 );
- BOOST_TEST_EQ( get<5>(v), std::string("text") );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<5>{}, 4, 'a' );
- BOOST_TEST_EQ( v.index(), 5 );
- BOOST_TEST_EQ( get<5>(v), std::string( 4, 'a' ) );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<4>{}, { 'a', 'b', 'c' } );
- BOOST_TEST_EQ( v.index(), 4 );
- BOOST_TEST_EQ( get<4>(v), (std::string{ 'a', 'b', 'c' }) );
- }
- {
- variant<int, int, float, float, std::string, std::string> v( in_place_index_t<5>{}, { 'a', 'b', 'c' }, std::allocator<char>() );
- BOOST_TEST_EQ( v.index(), 5 );
- BOOST_TEST_EQ( get<5>(v), (std::string{ 'a', 'b', 'c' }) );
- }
- return boost::report_errors();
- }
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