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// make_shared_perfect_forwarding_test.cpp - a test of make_shared
// perfect forwarding of constructor arguments when using a C++0x
// compiler.
//
// Copyright 2009 Frank Mori Hess
//
// 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/shared_ptr.hpp>
#if defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
int main()
{
return 0;
}
#else // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
class myarg
{
public:
myarg()
{}
private:
myarg(myarg && other)
{}
myarg& operator=(myarg && other)
{
return *this;
}
myarg(const myarg & other)
{}
myarg& operator=(const myarg & other)
{
return *this;
}
};
class X
{
public:
enum constructor_id
{
move_constructor,
const_ref_constructor,
ref_constructor
};
X(myarg &&arg): constructed_by_(move_constructor)
{}
X(const myarg &arg): constructed_by_(const_ref_constructor)
{}
X(myarg &arg): constructed_by_(ref_constructor)
{}
constructor_id constructed_by_;
};
struct Y
{
Y(int &value): ref(value)
{}
int &ref;
};
int main()
{
{
myarg a;
boost::shared_ptr< X > x = boost::make_shared< X >(a);
BOOST_TEST( x->constructed_by_ == X::ref_constructor);
}
{
const myarg ca;
boost::shared_ptr< X > x = boost::make_shared< X >(ca);
BOOST_TEST( x->constructed_by_ == X::const_ref_constructor);
}
{
boost::shared_ptr< X > x = boost::make_shared< X >(myarg());
BOOST_TEST( x->constructed_by_ == X::move_constructor);
}
{
int value = 1;
boost::shared_ptr< Y > y = boost::make_shared< Y >(value);
BOOST_TEST( y->ref == 1 && value == y->ref );
++y->ref;
BOOST_TEST( value == y->ref );
}
return boost::report_errors();
}
#endif // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
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