77 lines
2.7 KiB
Plaintext
77 lines
2.7 KiB
Plaintext
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
Copyright (c) 2005-2006 Dan Marsden
|
|
|
|
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_PREV_IMPL_13122005_2110)
|
|
#define FUSION_PREV_IMPL_13122005_2110
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/fusion/iterator/prior.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
struct transform_view_iterator_tag;
|
|
struct transform_view_iterator2_tag;
|
|
|
|
template<typename First, typename F>
|
|
struct transform_view_iterator;
|
|
|
|
template <typename First1, typename First2, typename F>
|
|
struct transform_view_iterator2;
|
|
|
|
namespace extension
|
|
{
|
|
template<typename Tag>
|
|
struct prior_impl;
|
|
|
|
// Unary Version
|
|
template<>
|
|
struct prior_impl<transform_view_iterator_tag>
|
|
{
|
|
template<typename Iterator>
|
|
struct apply
|
|
{
|
|
typedef typename Iterator::first_type first_type;
|
|
typedef typename result_of::prior<first_type>::type prior_type;
|
|
typedef typename Iterator::transform_type transform_type;
|
|
typedef transform_view_iterator<prior_type, transform_type> type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type
|
|
call(Iterator const& i)
|
|
{
|
|
return type(fusion::prior(i.first), i.f);
|
|
}
|
|
};
|
|
};
|
|
|
|
// Binary Version
|
|
template<>
|
|
struct prior_impl<transform_view_iterator2_tag>
|
|
{
|
|
template<typename Iterator>
|
|
struct apply
|
|
{
|
|
typedef typename Iterator::first1_type first1_type;
|
|
typedef typename Iterator::first2_type first2_type;
|
|
typedef typename result_of::prior<first1_type>::type prior1_type;
|
|
typedef typename result_of::prior<first2_type>::type prior2_type;
|
|
typedef typename Iterator::transform_type transform_type;
|
|
typedef transform_view_iterator2<prior1_type, prior2_type, transform_type> type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type
|
|
call(Iterator const& i)
|
|
{
|
|
return type(fusion::prior(i.first1), fusion::prior(i.first2), i.f);
|
|
}
|
|
};
|
|
};
|
|
}
|
|
}}
|
|
|
|
#endif
|