Chris@16: 
Chris@16: #ifndef BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
Chris@16: #define BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2003-2007
Chris@16: // Copyright David Abrahams 2003-2004
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/set/aux_/set0.hpp>
Chris@16: #include <boost/mpl/has_key.hpp>
Chris@16: #include <boost/mpl/iterator_tags.hpp>
Chris@16: #include <boost/mpl/next.hpp>
Chris@16: #include <boost/mpl/eval_if.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: #include <boost/mpl/identity.hpp>
Chris@16: #include <boost/mpl/aux_/config/ctps.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl {
Chris@16: 
Chris@16: // used by 's_iter_get'
Chris@16: template< typename Set, typename Tail > struct s_iter;
Chris@16: 
Chris@16: template< typename Set, typename Tail > struct s_iter_get
Chris@16:     : eval_if< 
Chris@16:           has_key< Set,typename Tail::item_type_ >
Chris@16:         , identity< s_iter<Set,Tail> >
Chris@16:         , next< s_iter<Set,Tail> >
Chris@16:         >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename Set, typename Tail > struct s_iter_impl
Chris@16: {
Chris@16:     typedef Tail                        tail_;
Chris@16:     typedef forward_iterator_tag        category;
Chris@16:     typedef typename Tail::item_type_   type;
Chris@16: 
Chris@16: #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
Chris@16:     typedef typename s_iter_get< Set,typename Tail::base >::type next;
Chris@16: #endif
Chris@16: };
Chris@16: 
Chris@16: #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
Chris@16: 
Chris@16: template< typename Set, typename Tail > 
Chris@16: struct next< s_iter<Set,Tail> >
Chris@16:     : s_iter_get< Set,typename Tail::base >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename Set > 
Chris@16: struct next< s_iter<Set,set0<> > >
Chris@16: {
Chris@16:     typedef s_iter<Set,set0<> > type;
Chris@16: };
Chris@16: 
Chris@16: template< typename Set, typename Tail > struct s_iter
Chris@16:     : s_iter_impl<Set,Tail>
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: template< typename Set > struct s_iter<Set, set0<> >
Chris@16: {
Chris@16:     typedef forward_iterator_tag category;
Chris@16: };
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: template< typename Set >
Chris@16: struct s_end_iter
Chris@16: {
Chris@16:     typedef forward_iterator_tag    category;
Chris@16:     typedef s_iter<Set,set0<> >     next;
Chris@16: };
Chris@16: 
Chris@16: template< typename Set, typename Tail > struct s_iter
Chris@16:     : if_< 
Chris@16:           is_same< Tail,set0<> >
Chris@16:         , s_end_iter<Set>
Chris@16:         , s_iter_impl<Set,Tail>
Chris@16:         >::type
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED