125 lines
2.6 KiB
C++
125 lines
2.6 KiB
C++
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// Copyright 2017 Peter Dimov.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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#include <boost/variant2/variant.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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#include <type_traits>
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#include <utility>
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#include <string>
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using namespace boost::variant2;
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struct X
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{
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operator int() const { return 2; }
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};
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int main()
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{
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{
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variant<int> v( 1 );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST_EQ( get<0>(v), 1 );
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}
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{
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variant<int> v( 'a' );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST_EQ( get<0>(v), 'a' );
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}
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{
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variant<int> v( X{} );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST_EQ( get<0>(v), 2 );
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}
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{
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variant<int const> v( 1 );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST_EQ( get<0>(v), 1 );
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}
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{
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variant<int const> v( 'a' );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST_EQ( get<0>(v), 'a' );
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}
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{
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variant<int const> v( X{} );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST_EQ( get<0>(v), 2 );
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}
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{
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variant<int, float, std::string> v( 1 );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST( holds_alternative<int>(v) );
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BOOST_TEST_EQ( get<0>(v), 1 );
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}
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{
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variant<int, float, std::string> v( 'a' );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST( holds_alternative<int>(v) );
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BOOST_TEST_EQ( get<0>(v), 'a' );
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}
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{
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variant<int, float, std::string> v( X{} );
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BOOST_TEST_EQ( v.index(), 0 );
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BOOST_TEST( holds_alternative<int>(v) );
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BOOST_TEST_EQ( get<0>(v), 2 );
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}
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{
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variant<int, float, std::string> v( 3.14f );
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BOOST_TEST_EQ( v.index(), 1 );
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BOOST_TEST( holds_alternative<float>(v) );
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BOOST_TEST_EQ( get<1>(v), 3.14f );
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}
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{
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variant<int, float, std::string> v( "text" );
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BOOST_TEST_EQ( v.index(), 2 );
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BOOST_TEST( holds_alternative<std::string>(v) );
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BOOST_TEST_EQ( get<2>(v), std::string("text") );
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}
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{
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variant<int, int, float, std::string> v( 3.14f );
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BOOST_TEST_EQ( v.index(), 2 );
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BOOST_TEST( holds_alternative<float>(v) );
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BOOST_TEST_EQ( get<2>(v), 3.14f );
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}
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{
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variant<int, int, float, std::string> v( "text" );
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BOOST_TEST_EQ( v.index(), 3 );
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BOOST_TEST( holds_alternative<std::string>(v) );
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BOOST_TEST_EQ( get<3>(v), std::string("text") );
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}
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return boost::report_errors();
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}
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