1 2 #ifndef BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED 3 #define BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2000-2004 6 // 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) 10 // 11 // See http://www.boost.org/libs/mpl for documentation. 12 13 // $Id: back.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 14 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ 15 // $Revision: 49267 $ 16 17 #include <boost/mpl/back_fwd.hpp> 18 #include <boost/mpl/next_prior.hpp> 19 #include <boost/mpl/vector/aux_/at.hpp> 20 #include <boost/mpl/vector/aux_/tag.hpp> 21 #include <boost/mpl/aux_/config/typeof.hpp> 22 #include <boost/mpl/aux_/config/ctps.hpp> 23 24 namespace boost { namespace mpl { 25 26 #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES) 27 28 template<> 29 struct back_impl< aux::vector_tag > 30 { 31 template< typename Vector > struct apply 32 : v_at< 33 Vector 34 , prior<typename Vector::size>::type::value 35 > 36 { 37 }; 38 }; 39 40 #else 41 42 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) 43 44 template< long n_ > 45 struct back_impl< aux::vector_tag<n_> > 46 { 47 template< typename Vector > struct apply 48 { 49 typedef typename Vector::back type; 50 }; 51 }; 52 53 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION 54 55 #endif // BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES 56 57 }} 58 59 #endif // BOOST_MPL_VECTOR_AUX_BACK_HPP_INCLUDED 60