149 lines
4.6 KiB
Plaintext
149 lines
4.6 KiB
Plaintext
/*=============================================================================
|
|
Copyright (c) 2011 Eric Niebler
|
|
|
|
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(BOOST_FUSION_SEGMENTED_ITERATOR_SEGMENTED_ITERATOR_HPP_INCLUDED)
|
|
#define BOOST_FUSION_SEGMENTED_ITERATOR_SEGMENTED_ITERATOR_HPP_INCLUDED
|
|
|
|
#include <boost/fusion/support/config.hpp>
|
|
#include <boost/mpl/bool.hpp>
|
|
#include <boost/fusion/sequence/intrinsic_fwd.hpp>
|
|
#include <boost/fusion/iterator/iterator_facade.hpp>
|
|
#include <boost/fusion/iterator/deref.hpp>
|
|
#include <boost/fusion/iterator/deref_data.hpp>
|
|
#include <boost/fusion/iterator/key_of.hpp>
|
|
#include <boost/fusion/iterator/value_of.hpp>
|
|
#include <boost/fusion/iterator/value_of_data.hpp>
|
|
#include <boost/fusion/iterator/detail/segmented_equal_to.hpp>
|
|
|
|
namespace boost { namespace fusion
|
|
{
|
|
struct nil_;
|
|
|
|
namespace detail
|
|
{
|
|
template <typename Stack>
|
|
struct segmented_next_impl;
|
|
}
|
|
|
|
// A segmented iterator wraps a "context", which is a cons list
|
|
// of ranges, the frontmost is range over values and the rest
|
|
// are ranges over internal segments.
|
|
template <typename Context>
|
|
struct segmented_iterator
|
|
: iterator_facade<segmented_iterator<Context>, forward_traversal_tag>
|
|
{
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED explicit segmented_iterator(Context const& ctx)
|
|
: context(ctx)
|
|
{}
|
|
|
|
//auto deref(it)
|
|
//{
|
|
// return deref(begin(car(it.context)))
|
|
//}
|
|
template <typename It>
|
|
struct deref
|
|
{
|
|
typedef
|
|
typename result_of::deref<
|
|
typename It::context_type::car_type::begin_type
|
|
>::type
|
|
type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type call(It const& it)
|
|
{
|
|
return *it.context.car.first;
|
|
}
|
|
};
|
|
|
|
//auto deref_data(it)
|
|
//{
|
|
// return deref_data(begin(car(it.context)))
|
|
//}
|
|
template <typename It>
|
|
struct deref_data
|
|
{
|
|
typedef
|
|
typename result_of::deref_data<
|
|
typename It::context_type::car_type::begin_type
|
|
>::type
|
|
type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type call(It const& it)
|
|
{
|
|
return fusion::deref_data(it.context.car.first);
|
|
}
|
|
};
|
|
|
|
//auto key_of(it)
|
|
//{
|
|
// return key_of(begin(car(it.context)))
|
|
//}
|
|
template <typename It>
|
|
struct key_of
|
|
: result_of::key_of<typename It::context_type::car_type::begin_type>
|
|
{};
|
|
|
|
//auto value_of(it)
|
|
//{
|
|
// return value_of(begin(car(it.context)))
|
|
//}
|
|
template <typename It>
|
|
struct value_of
|
|
: result_of::value_of<typename It::context_type::car_type::begin_type>
|
|
{};
|
|
|
|
//auto value_of_data(it)
|
|
//{
|
|
// return value_of_data(begin(car(it.context)))
|
|
//}
|
|
template <typename It>
|
|
struct value_of_data
|
|
: result_of::value_of_data<typename It::context_type::car_type::begin_type>
|
|
{};
|
|
|
|
// Compare all the segment iterators in each stack, starting with
|
|
// the bottom-most.
|
|
template <
|
|
typename It1
|
|
, typename It2
|
|
, int Size1 = It1::context_type::size::value
|
|
, int Size2 = It2::context_type::size::value
|
|
>
|
|
struct equal_to
|
|
: mpl::false_
|
|
{};
|
|
|
|
template <typename It1, typename It2, int Size>
|
|
struct equal_to<It1, It2, Size, Size>
|
|
: detail::segmented_equal_to<
|
|
typename It1::context_type
|
|
, typename It2::context_type
|
|
>
|
|
{};
|
|
|
|
template <typename It>
|
|
struct next
|
|
{
|
|
typedef detail::segmented_next_impl<typename It::context_type> impl;
|
|
typedef segmented_iterator<typename impl::type> type;
|
|
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
|
static type call(It const& it)
|
|
{
|
|
return type(impl::call(it.context));
|
|
}
|
|
};
|
|
|
|
typedef Context context_type;
|
|
context_type context;
|
|
};
|
|
|
|
}}
|
|
|
|
#endif
|