99 lines
2.0 KiB
C++
99 lines
2.0 KiB
C++
// make_shared_perfect_forwarding_test.cpp - a test of make_shared
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// perfect forwarding of constructor arguments when using a C++0x
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// compiler.
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//
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// Copyright 2009 Frank Mori Hess
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//
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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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#include <boost/detail/lightweight_test.hpp>
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#include <boost/make_shared.hpp>
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#include <boost/shared_ptr.hpp>
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#if defined( BOOST_NO_CXX11_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 // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
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class myarg
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{
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public:
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myarg()
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{}
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private:
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myarg(myarg && other)
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{}
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myarg& operator=(myarg && other)
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{
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return *this;
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}
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myarg(const myarg & other)
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{}
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myarg& operator=(const myarg & other)
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{
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return *this;
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}
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};
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class X
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{
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public:
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enum constructor_id
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{
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move_constructor,
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const_ref_constructor,
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ref_constructor
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};
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X(myarg &&arg): constructed_by_(move_constructor)
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{}
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X(const myarg &arg): constructed_by_(const_ref_constructor)
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{}
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X(myarg &arg): constructed_by_(ref_constructor)
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{}
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constructor_id constructed_by_;
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};
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struct Y
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{
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Y(int &value): ref(value)
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{}
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int &ref;
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};
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int main()
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{
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{
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myarg a;
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boost::shared_ptr< X > x = boost::make_shared< X >(a);
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BOOST_TEST( x->constructed_by_ == X::ref_constructor);
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}
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{
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const myarg ca;
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boost::shared_ptr< X > x = boost::make_shared< X >(ca);
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BOOST_TEST( x->constructed_by_ == X::const_ref_constructor);
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}
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{
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boost::shared_ptr< X > x = boost::make_shared< X >(myarg());
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BOOST_TEST( x->constructed_by_ == X::move_constructor);
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}
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{
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int value = 1;
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boost::shared_ptr< Y > y = boost::make_shared< Y >(value);
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BOOST_TEST( y->ref == 1 && value == y->ref );
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++y->ref;
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BOOST_TEST( value == y->ref );
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}
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return boost::report_errors();
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}
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#endif // !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
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