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/*
Copyright 2018 Glen Joseph Fernandes
(glenjofe@gmail.com)
Distributed under the Boost Software License, Version 1.0.
(http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#include <boost/core/exchange.hpp>
#include <boost/core/lightweight_test.hpp>
class C1 {
public:
explicit C1(int i)
: i_(i) { }
C1(C1&& c)
: i_(c.i_) { }
C1& operator=(C1&& c) {
i_ = c.i_;
return *this;
}
int i() const {
return i_;
}
private:
C1(const C1&);
C1& operator=(const C1&);
int i_;
};
void test1()
{
C1 x(1);
BOOST_TEST(boost::exchange(x, C1(2)).i() == 1);
BOOST_TEST(x.i() == 2);
}
class C2 {
public:
explicit C2(int i)
: i_(i) { }
operator C1() const {
return C1(i_);
}
int i() const {
return i_;
}
private:
C2(const C2&);
C2& operator=(const C2&);
int i_;
};
void test2()
{
C1 x(1);
BOOST_TEST(boost::exchange(x, C2(2)).i() == 1);
BOOST_TEST(x.i() == 2);
}
class C3 {
public:
explicit C3(int i)
: i_(i) { }
C3(C3&& c)
: i_(c.i_) { }
C3& operator=(C1&& c) {
i_ = c.i();
return *this;
}
int i() const {
return i_;
}
private:
C3(const C3&);
C3& operator=(const C3&);
int i_;
};
void test3()
{
C3 x(1);
BOOST_TEST(boost::exchange(x, C1(2)).i() == 1);
BOOST_TEST(x.i() == 2);
}
int main()
{
test1();
test2();
test3();
return boost::report_errors();
}
#else
int main()
{
return 0;
}
#endif
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