You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.7 KiB
62 lines
1.7 KiB
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
Copyright (c) 2005 Eric Niebler
|
|
|
|
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)
|
|
==============================================================================*/
|
|
#if !defined(FUSION_NEXT_IMPL_07172005_0836)
|
|
#define FUSION_NEXT_IMPL_07172005_0836
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/fusion/iterator/next.hpp>
|
|
#include <boost/fusion/iterator/equal_to.hpp>
|
|
#include <boost/mpl/eval_if.hpp>
|
|
#include <boost/mpl/identity.hpp>
|
|
#include <boost/type_traits/is_const.hpp>
|
|
#include <boost/type_traits/add_const.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
struct cons_iterator_tag;
|
|
|
|
template <typename Cons>
|
|
struct cons_iterator;
|
|
|
|
namespace extension
|
|
{
|
|
template <typename Tag>
|
|
struct next_impl;
|
|
|
|
template <>
|
|
struct next_impl<cons_iterator_tag>
|
|
{
|
|
template <typename Iterator>
|
|
struct apply
|
|
{
|
|
typedef typename Iterator::cons_type cons_type;
|
|
typedef typename cons_type::cdr_type cdr_type;
|
|
|
|
typedef cons_iterator<
|
|
typename mpl::eval_if<
|
|
is_const<cons_type>
|
|
, add_const<cdr_type>
|
|
, mpl::identity<cdr_type>
|
|
>::type>
|
|
type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type
|
|
call(Iterator const& i)
|
|
{
|
|
return type(i.cons.cdr);
|
|
}
|
|
};
|
|
};
|
|
}
|
|
}}
|
|
|
|
#endif
|
|
|
|
|