#include "boost/optional/optional.hpp"

#ifdef __BORLANDC__

#pragma hdrstop

#endif

using boost::optional;

#if (!defined BOOST_OPTIONAL_DETAIL_NO_IS_CONSTRUCTIBLE_TRAIT)

struct X {};

struct Y {};

struct Resource

{

explicit Resource(const X&) {}

};

BOOST_STATIC_ASSERT(( boost::is_constructible<Resource, const X&>::value ));

BOOST_STATIC_ASSERT(( !boost::is_constructible<Resource, const Y&>::value ));

BOOST_STATIC_ASSERT(( boost::is_constructible<optional<Resource>, const X&>::value ));

BOOST_STATIC_ASSERT(( !boost::is_constructible<optional<Resource>, const Y&>::value ));

#ifndef BOOST_OPTIONAL_DETAIL_NO_SFINAE_FRIENDLY_CONSTRUCTORS

BOOST_STATIC_ASSERT(( boost::is_constructible< optional< optional<int> >, optional<int> >::value ));

BOOST_STATIC_ASSERT(( !boost::is_constructible< optional<int>, optional< optional<int> > >::value ));

BOOST_STATIC_ASSERT(( boost::is_constructible< optional< optional<int> >, const optional<int>& >::value ));

BOOST_STATIC_ASSERT(( !boost::is_constructible< optional<int>, const optional< optional<int> >& >::value ));

BOOST_STATIC_ASSERT(( boost::is_constructible<optional<Resource>, const optional<X>&>::value ));

BOOST_STATIC_ASSERT(( !boost::is_constructible<optional<Resource>, const optional<Y>&>::value ));

#endif

#endif

int main() { }