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