williamr@2: 
williamr@2: #ifndef BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
williamr@2: #define BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
williamr@2: 
williamr@2: // Copyright Aleksey Gurtovoy 2000-2004
williamr@2: //
williamr@2: // Distributed under the Boost Software License, Version 1.0. 
williamr@2: // (See accompanying file LICENSE_1_0.txt or copy at 
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: // See http://www.boost.org/libs/mpl for documentation.
williamr@2: 
williamr@2: // $Source: /cvsroot/boost/boost/boost/mpl/vector/aux_/front.hpp,v $
williamr@2: // $Date: 2004/09/02 15:41:19 $
williamr@2: // $Revision: 1.4 $
williamr@2: 
williamr@2: #include <boost/mpl/front_fwd.hpp>
williamr@2: #include <boost/mpl/vector/aux_/at.hpp>
williamr@2: #include <boost/mpl/vector/aux_/tag.hpp>
williamr@2: #include <boost/mpl/aux_/nttp_decl.hpp>
williamr@2: #include <boost/mpl/aux_/config/typeof.hpp>
williamr@2: #include <boost/mpl/aux_/config/ctps.hpp>
williamr@2: 
williamr@2: namespace boost { namespace mpl {
williamr@2: 
williamr@2: #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
williamr@2: 
williamr@2: template<>
williamr@2: struct front_impl< aux::vector_tag >
williamr@2: {
williamr@2:     template< typename Vector > struct apply
williamr@2:         : v_at<Vector,0>
williamr@2:     {
williamr@2:     };
williamr@2: };
williamr@2: 
williamr@2: #else
williamr@2: 
williamr@2: #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
williamr@2: 
williamr@2: template< BOOST_MPL_AUX_NTTP_DECL(long, n_) >
williamr@2: struct front_impl< aux::vector_tag<n_> >
williamr@2: {
williamr@2:     template< typename Vector > struct apply
williamr@2:     {
williamr@2:         typedef typename Vector::item0 type;
williamr@2:     };
williamr@2: };
williamr@2: 
williamr@2: #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
williamr@2: 
williamr@2: #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
williamr@2: 
williamr@2: }}
williamr@2: 
williamr@2: #endif // BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED