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/*=============================================================================
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_ADAPTER_08112011_0942)
#define FUSION_ITERATOR_ADAPTER_08112011_0942
#include <boost/fusion/iterator/detail/advance.hpp>
#include <boost/fusion/iterator/iterator_facade.hpp>
#include <boost/type_traits/remove_const.hpp>
namespace boost { namespace fusion
{
template <typename Derived_, typename Iterator_,
typename Category = typename Iterator_::category>
struct iterator_adapter
: iterator_facade<Derived_, Category>
{
typedef typename
remove_const<Iterator_>::type
iterator_base_type;
iterator_base_type iterator_base;
iterator_adapter(iterator_base_type const& iterator_base_)
: iterator_base(iterator_base_) {}
// default implementation
template <typename I1, typename I2>
struct equal_to
: result_of::equal_to<
typename I1::iterator_base_type
, typename I2::iterator_base_type
>
{};
// default implementation
template <typename Iterator, typename N>
struct advance
{
typedef typename Derived_::template make<
typename result_of::advance<
typename Iterator::iterator_base_type, N
>::type>::type
type;
static type
call(Iterator const& it)
{
return type(fusion::advance<N>(it.iterator_base));
}
};
// default implementation
template <typename First, typename Last>
struct distance
: result_of::distance<
typename First::iterator_base_type
, typename Last::iterator_base_type
>
{};
// default implementation
template <typename Iterator>
struct value_of
: result_of::value_of<
typename Iterator::iterator_base_type
>
{};
// default implementation
template <typename Iterator>
struct deref
{
typedef typename
result_of::deref<
typename Iterator::iterator_base_type
>::type
type;
static type
call(Iterator const& it)
{
return fusion::deref(it.iterator_base);
}
};
// default implementation
template <typename Iterator>
struct next
{
typedef typename Derived_::template make<
typename result_of::next<
typename Iterator::iterator_base_type
>::type>::type
type;
static type
call(Iterator const& i)
{
return type(fusion::next(i.iterator_base));
}
};
// default implementation
template <typename Iterator>
struct prior
{
typedef typename Derived_::template make<
typename result_of::prior<
typename Iterator::iterator_base_type
>::type>::type
type;
static type
call(Iterator const& i)
{
return type(fusion::prior(i.iterator_base));
}
};
};
}}
#endif
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