/*============================================================================= | |
Copyright (c) 2001-2006 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 | |