#ifndef BOOST_MPL_AUX_HAS_KEY_IMPL_HPP_INCLUDED

 #define BOOST_MPL_AUX_HAS_KEY_IMPL_HPP_INCLUDED

 // Copyright Aleksey Gurtovoy 2002-2004

 // Copyright David Abrahams 2003

 //

 // 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)

 //

 // See http://www.boost.org/libs/mpl for documentation.

 // $Source: /cvsroot/boost/boost/boost/mpl/aux_/has_key_impl.hpp,v $

 // $Date: 2004/09/02 15:40:43 $

 // $Revision: 1.3 $

 #include <boost/mpl/has_key_fwd.hpp>

 #include <boost/mpl/aux_/traits_lambda_spec.hpp>

 namespace boost { namespace mpl {

 // no default implementation; the definition is needed to make MSVC happy 

 template< typename Tag > struct has_key_impl

 {

     template< typename AssociativeSequence, typename Key > struct apply;

 };

 BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,has_key_impl)

 }}

 #endif // BOOST_MPL_AUX_HAS_KEY_IMPL_HPP_INCLUDED