{

boost::optional<NotDefaultConstructible> o;

BOOST_TEST(boost::none == o);

{

T& t_;

template<class... Args>

W(Args&&... args)

: t_(std::forward<Args>(args)...)

{

}

{

#ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX

{

S s;

W<S> w{s};

}

#endif

{

S s;

W<S> w(s);

}

{

boost::optional<W<S&> > o;

BOOST_TEST(boost::none == o);

{

test_tc_base();

test_value_init();

test_optional_reference_wrapper();

return boost::report_errors();