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120 lines
2.9 KiB
120 lines
2.9 KiB
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#ifndef BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED |
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#define BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2000-2004 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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// $Id: joint_iter.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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// $Revision: 49267 $ |
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#include <boost/mpl/next_prior.hpp> |
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#include <boost/mpl/deref.hpp> |
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#include <boost/mpl/iterator_tags.hpp> |
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#include <boost/mpl/aux_/lambda_spec.hpp> |
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#include <boost/mpl/aux_/config/ctps.hpp> |
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#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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# include <boost/type_traits/is_same.hpp> |
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#endif |
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namespace boost { namespace mpl { |
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#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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template< |
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typename Iterator1 |
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, typename LastIterator1 |
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, typename Iterator2 |
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> |
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struct joint_iter |
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{ |
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typedef Iterator1 base; |
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typedef forward_iterator_tag category; |
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}; |
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template< |
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typename LastIterator1 |
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, typename Iterator2 |
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> |
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struct joint_iter<LastIterator1,LastIterator1,Iterator2> |
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{ |
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typedef Iterator2 base; |
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typedef forward_iterator_tag category; |
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}; |
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template< typename I1, typename L1, typename I2 > |
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struct deref< joint_iter<I1,L1,I2> > |
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{ |
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typedef typename joint_iter<I1,L1,I2>::base base_; |
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typedef typename deref<base_>::type type; |
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}; |
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template< typename I1, typename L1, typename I2 > |
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struct next< joint_iter<I1,L1,I2> > |
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{ |
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typedef joint_iter< typename mpl::next<I1>::type,L1,I2 > type; |
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}; |
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template< typename L1, typename I2 > |
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struct next< joint_iter<L1,L1,I2> > |
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{ |
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typedef joint_iter< L1,L1,typename mpl::next<I2>::type > type; |
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}; |
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#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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template< |
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typename Iterator1 |
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, typename LastIterator1 |
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, typename Iterator2 |
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> |
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struct joint_iter; |
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template< bool > struct joint_iter_impl |
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{ |
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template< typename I1, typename L1, typename I2 > struct result_ |
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{ |
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typedef I1 base; |
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typedef forward_iterator_tag category; |
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typedef joint_iter< typename mpl::next<I1>::type,L1,I2 > next; |
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typedef typename deref<I1>::type type; |
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}; |
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}; |
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template<> struct joint_iter_impl<true> |
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{ |
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template< typename I1, typename L1, typename I2 > struct result_ |
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{ |
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typedef I2 base; |
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typedef forward_iterator_tag category; |
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typedef joint_iter< L1,L1,typename mpl::next<I2>::type > next; |
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typedef typename deref<I2>::type type; |
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}; |
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}; |
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template< |
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typename Iterator1 |
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, typename LastIterator1 |
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, typename Iterator2 |
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> |
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struct joint_iter |
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: joint_iter_impl< is_same<Iterator1,LastIterator1>::value > |
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::template result_<Iterator1,LastIterator1,Iterator2> |
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{ |
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}; |
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#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, joint_iter) |
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}} |
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#endif // BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
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