You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
266 lines
8.5 KiB
266 lines
8.5 KiB
3 years ago
|
/*=============================================================================
|
||
|
|
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_NEXT_IMPL_HPP_INCLUDED)
|
||
|
|
#define BOOST_FUSION_SEGMENTED_ITERATOR_NEXT_IMPL_HPP_INCLUDED
|
||
|
|
|
||
|
|
#include <boost/fusion/support/config.hpp>
|
||
|
|
#include <boost/type_traits/add_const.hpp>
|
||
|
|
#include <boost/type_traits/remove_reference.hpp>
|
||
|
|
#include <boost/fusion/iterator/equal_to.hpp>
|
||
|
|
#include <boost/fusion/container/list/cons_fwd.hpp>
|
||
|
|
#include <boost/fusion/iterator/next.hpp>
|
||
|
|
#include <boost/fusion/iterator/deref.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace fusion
|
||
|
|
{
|
||
|
|
template <typename First, typename Second>
|
||
|
|
struct iterator_range;
|
||
|
|
|
||
|
|
template <typename Context>
|
||
|
|
struct segmented_iterator;
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <typename Sequence, typename Stack>
|
||
|
|
struct segmented_begin_impl;
|
||
|
|
|
||
|
|
//bool is_invalid(stack)
|
||
|
|
//{
|
||
|
|
// return empty(car(stack));
|
||
|
|
//}
|
||
|
|
|
||
|
|
template <typename Stack>
|
||
|
|
struct is_invalid
|
||
|
|
: result_of::equal_to<
|
||
|
|
typename Stack::car_type::begin_type,
|
||
|
|
typename Stack::car_type::end_type
|
||
|
|
>
|
||
|
|
{};
|
||
|
|
|
||
|
|
////Advance the first iterator in the seq at the
|
||
|
|
////top of a stack of iterator ranges. Return the
|
||
|
|
////new stack.
|
||
|
|
//auto pop_front_car(stack)
|
||
|
|
//{
|
||
|
|
// return cons(iterator_range(next(begin(car(stack))), end(car(stack))), cdr(stack));
|
||
|
|
//}
|
||
|
|
|
||
|
|
template <typename Stack>
|
||
|
|
struct pop_front_car
|
||
|
|
{
|
||
|
|
typedef
|
||
|
|
iterator_range<
|
||
|
|
typename result_of::next<
|
||
|
|
typename Stack::car_type::begin_type
|
||
|
|
>::type
|
||
|
|
, typename Stack::car_type::end_type
|
||
|
|
>
|
||
|
|
car_type;
|
||
|
|
|
||
|
|
typedef
|
||
|
|
cons<car_type, typename Stack::cdr_type>
|
||
|
|
type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return type(
|
||
|
|
car_type(fusion::next(stack.car.first), stack.car.last),
|
||
|
|
stack.cdr);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <
|
||
|
|
typename Stack,
|
||
|
|
typename Next = typename pop_front_car<Stack>::type,
|
||
|
|
bool IsInvalid = is_invalid<Next>::value,
|
||
|
|
int StackSize = Stack::size::value>
|
||
|
|
struct segmented_next_impl_recurse;
|
||
|
|
|
||
|
|
// Handle the case where the top of the stack has no usable
|
||
|
|
//auto segmented_next_impl_recurse3(stack)
|
||
|
|
//{
|
||
|
|
// if (size(stack) == 1)
|
||
|
|
// return cons(iterator_range(end(car(stack)), end(car(stack))), nil_);
|
||
|
|
// else
|
||
|
|
// return segmented_next_impl_recurse(stack.cdr);
|
||
|
|
//}
|
||
|
|
|
||
|
|
template <
|
||
|
|
typename Stack,
|
||
|
|
int StackSize = Stack::size::value>
|
||
|
|
struct segmented_next_impl_recurse3
|
||
|
|
{
|
||
|
|
typedef segmented_next_impl_recurse<typename Stack::cdr_type> impl;
|
||
|
|
typedef typename impl::type type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return impl::call(stack.cdr);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Stack>
|
||
|
|
struct segmented_next_impl_recurse3<Stack, 1>
|
||
|
|
{
|
||
|
|
typedef typename Stack::car_type::end_type end_type;
|
||
|
|
typedef iterator_range<end_type, end_type> range_type;
|
||
|
|
typedef cons<range_type> type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return type(range_type(stack.car.last, stack.car.last));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
//auto segmented_next_impl_recurse2(stack)
|
||
|
|
//{
|
||
|
|
// auto res = segmented_begin_impl(front(car(stack)), stack);
|
||
|
|
// if (is_invalid(res))
|
||
|
|
// return segmented_next_impl_recurse3(stack);
|
||
|
|
// else
|
||
|
|
// return res;
|
||
|
|
//}
|
||
|
|
|
||
|
|
template <
|
||
|
|
typename Stack,
|
||
|
|
typename Sequence =
|
||
|
|
typename remove_reference<
|
||
|
|
typename add_const<
|
||
|
|
typename result_of::deref<
|
||
|
|
typename Stack::car_type::begin_type
|
||
|
|
>::type
|
||
|
|
>::type
|
||
|
|
>::type,
|
||
|
|
typename Result =
|
||
|
|
typename segmented_begin_impl<Sequence, Stack>::type,
|
||
|
|
bool IsInvalid =
|
||
|
|
is_invalid<Result>::value>
|
||
|
|
struct segmented_next_impl_recurse2
|
||
|
|
{
|
||
|
|
typedef segmented_next_impl_recurse3<Stack> impl;
|
||
|
|
typedef typename impl::type type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return impl::call(stack);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Stack, typename Sequence, typename Result>
|
||
|
|
struct segmented_next_impl_recurse2<Stack, Sequence, Result, false>
|
||
|
|
{
|
||
|
|
typedef Result type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return segmented_begin_impl<Sequence, Stack>::call(*stack.car.first, stack);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
//auto segmented_next_impl_recurse(stack)
|
||
|
|
//{
|
||
|
|
// auto next = pop_front_car(stack);
|
||
|
|
// if (is_invalid(next))
|
||
|
|
// if (1 == size(stack))
|
||
|
|
// return next;
|
||
|
|
// else
|
||
|
|
// return segmented_next_impl_recurse(cdr(stack));
|
||
|
|
// else
|
||
|
|
// return segmented_next_impl_recurse2(next)
|
||
|
|
//}
|
||
|
|
|
||
|
|
template <typename Stack, typename Next, bool IsInvalid, int StackSize>
|
||
|
|
struct segmented_next_impl_recurse
|
||
|
|
{
|
||
|
|
typedef
|
||
|
|
typename segmented_next_impl_recurse<typename Stack::cdr_type>::type
|
||
|
|
type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const& stack)
|
||
|
|
{
|
||
|
|
return segmented_next_impl_recurse<typename Stack::cdr_type>::call(stack.cdr);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Stack, typename Next>
|
||
|
|
struct segmented_next_impl_recurse<Stack, Next, true, 1>
|
||
|
|
{
|
||
|
|
typedef Next type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return pop_front_car<Stack>::call(stack);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Stack, typename Next, int StackSize>
|
||
|
|
struct segmented_next_impl_recurse<Stack, Next, false, StackSize>
|
||
|
|
{
|
||
|
|
typedef segmented_next_impl_recurse2<Next> impl;
|
||
|
|
typedef typename impl::type type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return impl::call(pop_front_car<Stack>::call(stack));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
//auto segmented_next_impl(stack)
|
||
|
|
//{
|
||
|
|
// // car(stack) is a seq of values, not a seq of segments
|
||
|
|
// auto next = pop_front_car(stack);
|
||
|
|
// if (is_invalid(next))
|
||
|
|
// return segmented_next_impl_recurse(cdr(next));
|
||
|
|
// else
|
||
|
|
// return next;
|
||
|
|
//}
|
||
|
|
|
||
|
|
template <
|
||
|
|
typename Stack,
|
||
|
|
typename Next = typename pop_front_car<Stack>::type,
|
||
|
|
bool IsInvalid = is_invalid<Next>::value>
|
||
|
|
struct segmented_next_impl_aux
|
||
|
|
{
|
||
|
|
typedef segmented_next_impl_recurse<typename Stack::cdr_type> impl;
|
||
|
|
typedef typename impl::type type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return impl::call(stack.cdr);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Stack, typename Next>
|
||
|
|
struct segmented_next_impl_aux<Stack, Next, false>
|
||
|
|
{
|
||
|
|
typedef Next type;
|
||
|
|
|
||
|
|
BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
|
||
|
|
static type call(Stack const & stack)
|
||
|
|
{
|
||
|
|
return pop_front_car<Stack>::call(stack);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename Stack>
|
||
|
|
struct segmented_next_impl
|
||
|
|
: segmented_next_impl_aux<Stack>
|
||
|
|
{};
|
||
|
|
}
|
||
|
|
}}
|
||
|
|
|
||
|
|
#endif
|