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//-----------------------------------------------------------------------------
// boost-libs variant/test/variant_swap_test.cpp source file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2009 ArtVPS Ltd.
// Copyright (c) 2013-2025 Antony Polukhin.
//
// 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/core/lightweight_test.hpp"
#include "boost/variant.hpp"
#include <vector>
#include <algorithm>
void run1()
{
using boost::variant;
typedef variant< int, std::vector<int>* > t_var;
std::vector<int> vec;
t_var v0(23), v1(&vec);
BOOST_TEST(v0.which() == 0);
BOOST_TEST(v1.which() == 1);
swap(v0, v1);
BOOST_TEST(v0.which() == 1);
BOOST_TEST(v1.which() == 0);
}
void run2()
{
using boost::variant;
using std::swap;
typedef variant< std::vector<int>, std::vector<double> > t_var;
std::vector<int> vec1;
std::vector<double> vec2;
t_var v0(vec1), v1(vec2);
BOOST_TEST(v0.which() == 0);
BOOST_TEST(v1.which() == 1);
swap(v0, v1);
BOOST_TEST(v0.which() == 1);
BOOST_TEST(v1.which() == 0);
v0.swap(v1);
BOOST_TEST(v0.which() == 0);
BOOST_TEST(v1.which() == 1);
}
void run3()
{
using boost::variant;
using std::swap;
typedef variant< int, double > t_var;
t_var v0(1), v1(2.0);
BOOST_TEST(v0.which() == 0);
BOOST_TEST(v1.which() == 1);
swap(v0, v1);
BOOST_TEST(v0.which() == 1);
BOOST_TEST(v1.which() == 0);
v0.swap(v1);
BOOST_TEST(v0.which() == 0);
BOOST_TEST(v1.which() == 1);
}
int main()
{
run1();
run2();
run3();
return boost::report_errors();
}
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