forked from boostorg/move
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
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//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2009.
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// Distributed under the Boost Software License, Version 1.0.
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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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//
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// See http://www.boost.org/libs/move for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#include <boost/config.hpp>
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#if !defined(BOOST_NO_RVALUE_REFERENCES)
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int main()
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{
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return 0;
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}
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#else
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//[how_works_example
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#include <boost/move/move.hpp>
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#include <iostream>
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class sink_tester
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{
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public: //conversions provided by BOOST_COPYABLE_AND_MOVABLE
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operator ::boost::rv<sink_tester>&()
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{ return *static_cast< ::boost::rv<sink_tester>* >(this); }
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operator const ::boost::rv<sink_tester>&() const
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{ return *static_cast<const ::boost::rv<sink_tester>* >(this); }
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};
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//Functions returning different r/lvalue types
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sink_tester rvalue() { return sink_tester(); }
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const sink_tester const_rvalue() { return sink_tester(); }
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sink_tester & lvalue() { static sink_tester lv; return lv; }
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const sink_tester & const_lvalue() { static const sink_tester clv = sink_tester(); return clv; }
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//BOOST_RV_REF overload
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void sink(::boost::rv<sink_tester> &) { std::cout << "non-const rvalue catched" << std::endl; }
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//BOOST_COPY_ASSIGN_REF overload
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void sink(const ::boost::rv<sink_tester> &){ std::cout << "const (r-l)value catched" << std::endl; }
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//Overload provided by BOOST_COPYABLE_AND_MOVABLE
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void sink(sink_tester &) { std::cout << "non-const lvalue catched" << std::endl; }
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int main()
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{
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sink(const_rvalue()); //"const (r-l)value catched"
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sink(const_lvalue()); //"const (r-l)value catched"
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sink(lvalue()); //"non-const lvalue catched"
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sink(rvalue()); //"non-const rvalue catched"
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return 0;
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}
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//]
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#endif
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