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// make_shared_move_emulation_test.cpp - a test of make_shared
// semi-perfect forwarding of constructor arguments when using a C++03
// compiler with move emulation.
// Note the "semi": it means moving temporaries (real r-values) doesn't work.
//
// Copyright 2016 Giel van Schijndel
//
// 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/make_shared.hpp>
#include <boost/move/core.hpp>
#include <boost/move/utility_core.hpp>
#include <boost/shared_ptr.hpp>
class movearg
{
private:
BOOST_MOVABLE_BUT_NOT_COPYABLE(movearg)
public:
movearg()
{}
movearg(BOOST_RV_REF(movearg))
{}
movearg& operator=(BOOST_RV_REF(movearg))
{
return *this;
}
};
class ByVal
{
public:
ByVal(movearg) {}
};
class ByRef
{
public:
enum constructor_id
{
move_constructor,
const_ref_constructor
};
ByRef(BOOST_RV_REF(movearg)): constructed_by_(move_constructor)
{}
ByRef(const movearg &arg): constructed_by_(const_ref_constructor)
{}
constructor_id constructed_by_;
};
int main()
{
{
movearg a;
boost::shared_ptr< ByVal > x = boost::make_shared< ByVal >(boost::move(a));
}
{
movearg a;
boost::shared_ptr< ByRef > x = boost::make_shared< ByRef >(boost::move(a));
BOOST_TEST( x->constructed_by_ == ByRef::move_constructor);
}
{
boost::shared_ptr< ByVal > x = boost::make_shared< ByVal >(movearg());
boost::shared_ptr< ByRef > y = boost::make_shared< ByRef >(movearg());
BOOST_TEST( y->constructed_by_ == ByRef::move_constructor);
}
{
const movearg ca;
boost::shared_ptr< ByRef > x = boost::make_shared< ByRef >(ca);
BOOST_TEST( x->constructed_by_ == ByRef::const_ref_constructor);
}
return boost::report_errors();
}
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