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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();
};
struct Y
{
Y() = delete;
};
int main()
{
{
variant<int> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 0 );
}
{
variant<int const> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 0 );
}
{
variant<int, float, std::string> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 0 );
}
{
variant<int, int, std::string> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), 0 );
}
{
variant<std::string> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), std::string() );
}
{
variant<std::string const> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), std::string() );
}
{
variant<std::string, int, float> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), std::string() );
}
{
variant<std::string, std::string, float> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v), std::string() );
}
{
BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int>>));
BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int const>>));
BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, X>>));
BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, float, X>>));
BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, int, X>>));
BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, X, X>>));
BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X>>));
BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X, int>>));
BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X, int, float>>));
BOOST_TEST_TRAIT_TRUE((std::is_default_constructible<variant<int, Y>>));
BOOST_TEST_TRAIT_FALSE((std::is_default_constructible<variant<Y, int>>));
}
return boost::report_errors();
}
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