#ifndef BOOST_MPL_PAIR_VIEW_HPP_INCLUDED #define BOOST_MPL_PAIR_VIEW_HPP_INCLUDED // Copyright David Abrahams 2003-2004 // Copyright Aleksey Gurtovoy 2004 // // 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. // $Source$ // $Date: 2004-11-27 20:58:27 -0500 (Sat, 27 Nov 2004) $ // $Revision: 26325 $ #include #include #include #include #include #include #include #include #include #include #include namespace boost { namespace mpl { namespace aux { struct pair_iter_tag; #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) template< typename Iter1, typename Iter2, typename Category > struct pair_iter; template< typename Category > struct prior_pair_iter { template< typename Iter1, typename Iter2 > struct apply { typedef typename mpl::prior::type i1_; typedef typename mpl::prior::type i2_; typedef pair_iter type; }; }; template<> struct prior_pair_iter { template< typename Iter1, typename Iter2 > struct apply { typedef pair_iter type; }; }; #endif } template< typename Iter1 , typename Iter2 , typename Category > struct pair_iter { typedef aux::pair_iter_tag tag; typedef Category category; typedef Iter1 first; typedef Iter2 second; #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) typedef pair< typename deref::type , typename deref::type > type; typedef typename mpl::next::type i1_; typedef typename mpl::next::type i2_; typedef pair_iter next; typedef apply_wrap2< aux::prior_pair_iter,Iter1,Iter2 >::type prior; #endif }; #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) template< typename Iter1, typename Iter2, typename C > struct deref< pair_iter > { typedef pair< typename deref::type , typename deref::type > type; }; template< typename Iter1, typename Iter2, typename C > struct next< pair_iter > { typedef typename mpl::next::type i1_; typedef typename mpl::next::type i2_; typedef pair_iter type; }; template< typename Iter1, typename Iter2, typename C > struct prior< pair_iter > { typedef typename mpl::prior::type i1_; typedef typename mpl::prior::type i2_; typedef pair_iter type; }; #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION template<> struct advance_impl { template< typename Iter, typename D > struct apply { typedef typename mpl::advance< typename Iter::first,D >::type i1_; typedef typename mpl::advance< typename Iter::second,D >::type i2_; typedef pair_iter type; }; }; template<> struct distance_impl { template< typename Iter1, typename Iter2 > struct apply { // agurt, 10/nov/04: MSVC 6.5 ICE-s on forwarding typedef typename mpl::distance< typename first::type , typename first::type >::type type; }; }; template< typename BOOST_MPL_AUX_NA_PARAM(Sequence1) , typename BOOST_MPL_AUX_NA_PARAM(Sequence2) > struct pair_view { typedef nested_begin_end_tag tag; typedef typename begin::type iter1_; typedef typename begin::type iter2_; typedef typename min< typename iterator_category::type , typename iterator_category::type >::type category_; typedef pair_iter begin; typedef pair_iter< typename end::type , typename end::type , category_ > end; }; BOOST_MPL_AUX_NA_SPEC(2, pair_view) }} #endif // BOOST_MPL_PAIR_VIEW_HPP_INCLUDED