//-----------------------------------------------------------------------------
// boost mpl/aux_/joint_iter.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2000-02
// Aleksey Gurtovoy
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appears in all copies and
// that both the copyright notice and this permission notice appear in
// supporting documentation. No representations are made about the
// suitability of this software for any purpose. It is provided "as is"
// without express or implied warranty.
#ifndef BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
#define BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
#include "boost/mpl/aux_/lambda_spec.hpp"
#include "boost/mpl/aux_/config/ctps.hpp"
#include "boost/type_traits/is_same.hpp"
namespace boost { namespace mpl {
namespace aux {
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
template<
typename Iterator1
, typename LastIterator1
, typename Iterator2
>
struct joint_iter
{
typedef Iterator1 base;
typedef typename base::category category;
typedef joint_iter<
typename base::next
, LastIterator1
, Iterator2
> next;
typedef typename base::type type;
};
template<
typename LastIterator1
, typename Iterator2
>
struct joint_iter<LastIterator1,LastIterator1,Iterator2>
{
typedef Iterator2 base;
typedef typename base::category category;
typedef joint_iter<
LastIterator1
, LastIterator1
, typename base::next
> next;
typedef typename base::type type;
};
#else
// forward decl. for 'joint_iter_impl'
template<
typename Iterator1
, typename LastIterator1
, typename Iterator2
>
struct joint_iter;
template< bool > struct joint_iter_impl
{
template<
typename Iterator1
, typename LastIterator1
, typename Iterator2
>
struct result_
{
typedef Iterator1 base;
// agurt, 16/nov/02: have to use 'Iterator1' instead of 'base' below
// to prevent 'base' and 'mpl::base' conflict on MSVC 6.0
typedef typename Iterator1::category category;
typedef joint_iter<
typename Iterator1::next
, LastIterator1
, Iterator2
> next;
typedef typename Iterator1::type type;
};
};
template<> struct joint_iter_impl<true>
{
template<
typename Iterator1
, typename LastIterator1
, typename Iterator2
>
struct result_
{
typedef Iterator2 base;
typedef typename Iterator2::category category;
typedef joint_iter<
LastIterator1
, LastIterator1
, typename Iterator2::next
> next;
typedef typename Iterator2::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
} // namespace aux
BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, aux::joint_iter)
}} // namespace boost::mpl
#endif // BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED