69 lines
2.2 KiB
Plaintext
69 lines
2.2 KiB
Plaintext
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
|
|
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_ITERATOR_FACADE_09252006_1011)
|
|
#define FUSION_ITERATOR_FACADE_09252006_1011
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/fusion/support/iterator_base.hpp>
|
|
#include <boost/fusion/iterator/detail/advance.hpp>
|
|
#include <boost/fusion/iterator/detail/distance.hpp>
|
|
#include <boost/fusion/support/category_of.hpp>
|
|
#include <boost/type_traits/is_same.hpp>
|
|
#include <boost/mpl/assert.hpp>
|
|
#include <boost/mpl/if.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
struct iterator_facade_tag;
|
|
|
|
template <typename Derived, typename Category>
|
|
struct iterator_facade : iterator_base<Derived>
|
|
{
|
|
typedef iterator_facade_tag fusion_tag;
|
|
typedef Derived derived_type;
|
|
typedef Category category;
|
|
|
|
// default implementation
|
|
template <typename I1, typename I2>
|
|
struct equal_to // default implementation
|
|
: is_same<
|
|
typename I1::derived_type
|
|
, typename I2::derived_type
|
|
>
|
|
{};
|
|
|
|
// default implementation
|
|
template <typename Iterator, typename N>
|
|
struct advance :
|
|
mpl::if_c<
|
|
(N::value > 0)
|
|
, advance_detail::forward<Iterator, N::value>
|
|
, advance_detail::backward<Iterator, N::value>
|
|
>::type
|
|
{
|
|
BOOST_MPL_ASSERT_NOT((traits::is_random_access<Iterator>));
|
|
};
|
|
|
|
// default implementation
|
|
template <typename First, typename Last>
|
|
struct distance :
|
|
distance_detail::linear_distance<First, Last>
|
|
{};
|
|
};
|
|
}}
|
|
|
|
#ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
|
|
namespace std
|
|
{
|
|
template <typename Derived, typename Category>
|
|
struct iterator_traits< ::boost::fusion::iterator_facade<Derived, Category> >
|
|
{ };
|
|
}
|
|
#endif
|
|
|
|
#endif
|