#ifndef BOOST_NETWORK_PROTOCOL_HTTP_RESOLVER_POLICY_20091214
#define BOOST_NETWORK_PROTOCOL_HTTP_RESOLVER_POLICY_20091214

//          Copyright Dean Michael Berris 2009.
// 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/network/protocol/http/tags.hpp>
#include <boost/network/protocol/http/policies/sync_resolver.hpp>
#include <boost/network/protocol/http/policies/async_resolver.hpp>
#include <boost/network/protocol/http/support/is_http.hpp>
#include <boost/network/support/is_async.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/and.hpp>

namespace boost { namespace network { namespace http {

    template <class Tag>
    struct unsupported_tag;

    template <class Tag>
    struct resolver_policy :
        mpl::if_<
            mpl::and_< is_async<Tag>,is_http<Tag> >,
            policies::async_resolver<Tag>,
            typename mpl::if_<is_http<Tag>,
                policies::sync_resolver<Tag>,
                unsupported_tag<Tag>
            >::type
            >
    {};

} // namespace http

} // namespace network

} // namespace boost

#endif // BOOST_NETWORK_PROTOCOL_HTTP_RESOLVER_POLICY_20091214

