Chris@16: 
Chris@16: #ifndef BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED
Chris@16: #define BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2000-2004
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. 
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/mpl for documentation.
Chris@16: 
Chris@101: // $Id$
Chris@101: // $Date$
Chris@101: // $Revision$
Chris@16: 
Chris@16: #include <boost/mpl/front_fwd.hpp>
Chris@16: #include <boost/mpl/begin_end.hpp>
Chris@16: #include <boost/mpl/deref.hpp>
Chris@16: #include <boost/mpl/aux_/traits_lambda_spec.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl {
Chris@16: 
Chris@16: // default implementation; conrete sequences might override it by 
Chris@16: // specializing either the 'front_impl' or the primary 'front' template
Chris@16: 
Chris@16: template< typename Tag >
Chris@16: struct front_impl
Chris@16: {
Chris@16:     template< typename Sequence > struct apply
Chris@16:     {
Chris@16:         typedef typename begin<Sequence>::type iter_;
Chris@16:         typedef typename deref<iter_>::type type;
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1,front_impl)
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED