{

#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES

template <typename T>

superconv(T&&) { static_assert(sizeof(T) == 0, "ERROR"); }

#else

template <typename T>

superconv(const T&) { static_assert(sizeof(T) == 0, "ERROR"); }

template <typename T>

superconv( T&) { static_assert(sizeof(T) == 0, "ERROR"); }

#endif

superconv() {}

{

#ifndef BOOST_OPTIONAL_DETAIL_NO_IS_CONSTRUCTIBLE_TRAIT

superconv<optional<int> > s;

superconv<optional<int> > & rs = s;

optional<superconv<optional<int> > > os = rs;

#endif

{

optional<int> oi1 (1), oiN;

optional< optional<int> > ooi1 (oi1), ooiN(oiN);

BOOST_TEST(ooi1);

BOOST_TEST(*ooi1);

BOOST_TEST_EQ(**ooi1, 1);

BOOST_TEST(ooiN);

BOOST_TEST(!*ooiN);

{

test_optional_optional_T();

test_optional_of_superconverting_T();

return boost::report_errors();