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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_DEREF_IMPL_07162005_1026)
#define FUSION_DEREF_IMPL_07162005_1026
#include <boost/mpl/apply.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/iterator/value_of.hpp>
#include <boost/fusion/view/transform_view/detail/apply_transform_result.hpp>
namespace boost { namespace fusion
{
struct transform_view_iterator_tag;
struct transform_view_iterator2_tag;
namespace extension
{
template <typename Tag>
struct deref_impl;
// Unary Version
template <>
struct deref_impl<transform_view_iterator_tag>
{
template <typename Iterator>
struct apply
{
typedef typename
result_of::deref<typename Iterator::first_type>::type
value_type;
typedef detail::apply_transform_result<typename Iterator::transform_type> transform_type;
typedef typename mpl::apply<transform_type, value_type>::type type;
static type
call(Iterator const& i)
{
return i.f(*i.first);
}
};
};
// Binary Version
template <>
struct deref_impl<transform_view_iterator2_tag>
{
template <typename Iterator>
struct apply
{
typedef typename
result_of::deref<typename Iterator::first1_type>::type
value1_type;
typedef typename
result_of::deref<typename Iterator::first2_type>::type
value2_type;
typedef detail::apply_transform_result<typename Iterator::transform_type> transform_type;
typedef typename mpl::apply<transform_type, value1_type, value2_type>::type type;
static type
call(Iterator const& i)
{
return i.f(*i.first1, *i.first2);
}
};
};
}
}}
#endif
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