79 lines
2.0 KiB
C++
79 lines
2.0 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 <string>
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using namespace boost::variant2;
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int main()
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{
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{
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variant<int> v;
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BOOST_TEST( holds_alternative<int>( v ) );
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}
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{
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variant<int, float> v;
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BOOST_TEST( holds_alternative<int>( v ) );
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BOOST_TEST( !holds_alternative<float>( v ) );
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}
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{
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variant<int, float> v( 3.14f );
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BOOST_TEST( !holds_alternative<int>( v ) );
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BOOST_TEST( holds_alternative<float>( v ) );
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}
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{
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variant<int, float, float> v;
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BOOST_TEST( holds_alternative<int>( v ) );
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}
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{
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variant<int, int, float> v( 3.14f );
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BOOST_TEST( holds_alternative<float>( v ) );
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}
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{
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variant<int, float, std::string> v;
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BOOST_TEST( holds_alternative<int>( v ) );
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BOOST_TEST( !holds_alternative<float>( v ) );
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BOOST_TEST( !holds_alternative<std::string>( v ) );
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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( !holds_alternative<int>( v ) );
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BOOST_TEST( holds_alternative<float>( v ) );
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BOOST_TEST( !holds_alternative<std::string>( v ) );
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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( !holds_alternative<int>( v ) );
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BOOST_TEST( !holds_alternative<float>( v ) );
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BOOST_TEST( holds_alternative<std::string>( v ) );
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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( holds_alternative<float>( v ) );
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BOOST_TEST( !holds_alternative<std::string>( v ) );
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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( !holds_alternative<float>( v ) );
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BOOST_TEST( holds_alternative<std::string>( v ) );
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}
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return boost::report_errors();
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}
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