| // 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/detail/lightweight_test.hpp> |
| #include <boost/make_shared.hpp> |
| #include <boost/shared_ptr.hpp> |
| |
| #if !defined( BOOST_HAS_RVALUE_REFS ) || !defined( BOOST_HAS_VARIADIC_TMPL ) |
| |
| int main() |
| { |
| return 0; |
| } |
| |
| #else // BOOST_HAS_RVALUE_REFS, BOOST_HAS_VARIADIC_TMPL |
| |
| 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 // BOOST_HAS_RVALUE_REFS |