2 #ifndef BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
3 #define BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED
5 // Copyright Aleksey Gurtovoy 2000-2004
7 // Distributed under the Boost Software License, Version 1.0.
8 // (See accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
11 // See http://www.boost.org/libs/mpl for documentation.
13 // $Source: /cvsroot/boost/boost/boost/mpl/vector/aux_/front.hpp,v $
14 // $Date: 2004/09/02 15:41:19 $
17 #include <boost/mpl/front_fwd.hpp>
18 #include <boost/mpl/vector/aux_/at.hpp>
19 #include <boost/mpl/vector/aux_/tag.hpp>
20 #include <boost/mpl/aux_/nttp_decl.hpp>
21 #include <boost/mpl/aux_/config/typeof.hpp>
22 #include <boost/mpl/aux_/config/ctps.hpp>
24 namespace boost { namespace mpl {
26 #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES)
29 struct front_impl< aux::vector_tag >
31 template< typename Vector > struct apply
39 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
41 template< BOOST_MPL_AUX_NTTP_DECL(long, n_) >
42 struct front_impl< aux::vector_tag<n_> >
44 template< typename Vector > struct apply
46 typedef typename Vector::item0 type;
50 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
52 #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES
56 #endif // BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED