121 lines
2.9 KiB
C++
121 lines
2.9 KiB
C++
|
|
#ifndef BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
|
|
#define BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
|
|
|
|
// Copyright Aleksey Gurtovoy 2000-2004
|
|
//
|
|
// 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.
|
|
|
|
// $Id: joint_iter.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
|
|
// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
|
|
// $Revision: 49267 $
|
|
|
|
#include <boost/mpl/next_prior.hpp>
|
|
#include <boost/mpl/deref.hpp>
|
|
#include <boost/mpl/iterator_tags.hpp>
|
|
#include <boost/mpl/aux_/lambda_spec.hpp>
|
|
#include <boost/mpl/aux_/config/ctps.hpp>
|
|
|
|
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
# include <boost/type_traits/is_same.hpp>
|
|
#endif
|
|
|
|
namespace boost { namespace mpl {
|
|
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
|
|
template<
|
|
typename Iterator1
|
|
, typename LastIterator1
|
|
, typename Iterator2
|
|
>
|
|
struct joint_iter
|
|
{
|
|
typedef Iterator1 base;
|
|
typedef forward_iterator_tag category;
|
|
};
|
|
|
|
template<
|
|
typename LastIterator1
|
|
, typename Iterator2
|
|
>
|
|
struct joint_iter<LastIterator1,LastIterator1,Iterator2>
|
|
{
|
|
typedef Iterator2 base;
|
|
typedef forward_iterator_tag category;
|
|
};
|
|
|
|
|
|
template< typename I1, typename L1, typename I2 >
|
|
struct deref< joint_iter<I1,L1,I2> >
|
|
{
|
|
typedef typename joint_iter<I1,L1,I2>::base base_;
|
|
typedef typename deref<base_>::type type;
|
|
};
|
|
|
|
template< typename I1, typename L1, typename I2 >
|
|
struct next< joint_iter<I1,L1,I2> >
|
|
{
|
|
typedef joint_iter< typename mpl::next<I1>::type,L1,I2 > type;
|
|
};
|
|
|
|
template< typename L1, typename I2 >
|
|
struct next< joint_iter<L1,L1,I2> >
|
|
{
|
|
typedef joint_iter< L1,L1,typename mpl::next<I2>::type > type;
|
|
};
|
|
|
|
#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
template<
|
|
typename Iterator1
|
|
, typename LastIterator1
|
|
, typename Iterator2
|
|
>
|
|
struct joint_iter;
|
|
|
|
template< bool > struct joint_iter_impl
|
|
{
|
|
template< typename I1, typename L1, typename I2 > struct result_
|
|
{
|
|
typedef I1 base;
|
|
typedef forward_iterator_tag category;
|
|
typedef joint_iter< typename mpl::next<I1>::type,L1,I2 > next;
|
|
typedef typename deref<I1>::type type;
|
|
};
|
|
};
|
|
|
|
template<> struct joint_iter_impl<true>
|
|
{
|
|
template< typename I1, typename L1, typename I2 > struct result_
|
|
{
|
|
typedef I2 base;
|
|
typedef forward_iterator_tag category;
|
|
typedef joint_iter< L1,L1,typename mpl::next<I2>::type > next;
|
|
typedef typename deref<I2>::type type;
|
|
};
|
|
};
|
|
|
|
template<
|
|
typename Iterator1
|
|
, typename LastIterator1
|
|
, typename Iterator2
|
|
>
|
|
struct joint_iter
|
|
: joint_iter_impl< is_same<Iterator1,LastIterator1>::value >
|
|
::template result_<Iterator1,LastIterator1,Iterator2>
|
|
{
|
|
};
|
|
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, joint_iter)
|
|
|
|
}}
|
|
|
|
#endif // BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
|