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make fold aware of segments

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[SVN r73906]
This commit is contained in:
Eric Niebler
2011-08-18 23:14:48 +00:00
parent 5ff6210759
commit 9fcb3105e5
14 changed files with 305 additions and 50 deletions
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61
include/boost/fusion/algorithm/iteration/detail/fold.hpp
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@ -15,6 +15,7 @@
#include <boost/fusion/sequence/intrinsic/end.hpp>
#include <boost/fusion/sequence/intrinsic/empty.hpp>
#include <boost/fusion/sequence/intrinsic/size.hpp>
#include <boost/fusion/support/is_segmented.hpp>
#include <boost/fusion/iterator/equal_to.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/iterator/value_of.hpp>
@ -347,53 +348,73 @@ namespace boost { namespace fusion
type;
};
template<int SeqSize, typename StateRef, typename It0, typename F>
template<int SeqSize, typename StateRef, typename Seq, typename F>
struct BOOST_PP_CAT(BOOST_FUSION_FOLD_NAME,_impl)
{
typedef typename
BOOST_PP_CAT(
result_of_first_unrolled,BOOST_FUSION_FOLD_NAME)<
StateRef
, BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM(It0)
, BOOST_FUSION_FOLD_IMPL_FIRST_IT_META_TRANSFORM(
typename result_of::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION<Seq>::type
)
, F
, SeqSize
>::type
type;
static type
call(StateRef state, It0 const& it0, F f)
call(StateRef state, Seq& seq, F f)
{
return BOOST_PP_CAT(unrolled_,BOOST_FUSION_FOLD_NAME)<
type
, SeqSize
>::call(state,BOOST_FUSION_FOLD_IMPL_FIRST_IT_TRANSFORM(it0),f);
typedef
BOOST_PP_CAT(unrolled_,BOOST_FUSION_FOLD_NAME)<
type
, SeqSize
>
unrolled_impl;
return unrolled_impl::call(
state,
BOOST_FUSION_FOLD_IMPL_FIRST_IT_TRANSFORM(
fusion::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION(seq)),
f);
}
};
template<typename StateRef, typename It0, typename F>
struct BOOST_PP_CAT(BOOST_FUSION_FOLD_NAME,_impl)<0,StateRef,It0,F>
template<typename StateRef, typename Seq, typename F>
struct BOOST_PP_CAT(BOOST_FUSION_FOLD_NAME,_impl)<0,StateRef,Seq,F>
{
typedef StateRef type;
static StateRef
call(StateRef state, It0 const&, F)
call(StateRef state, Seq&, F)
{
return static_cast<StateRef>(state);
}
};
template<typename Seq, typename State, typename F, bool IsSegmented>
struct BOOST_PP_CAT(result_of_, BOOST_FUSION_FOLD_NAME)
: BOOST_PP_CAT(BOOST_FUSION_FOLD_NAME,_impl)<
result_of::size<Seq>::value
, typename add_reference<
typename add_const<State>::type
>::type
, Seq
, F
>
{};
}
namespace result_of
{
template<typename Seq, typename State, typename F>
struct BOOST_FUSION_FOLD_NAME
: detail::BOOST_PP_CAT(BOOST_FUSION_FOLD_NAME,_impl)<
size<Seq>::value
, typename add_reference<
typename add_const<State>::type
>::type
, typename BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION<Seq>::type
: detail::BOOST_PP_CAT(result_of_, BOOST_FUSION_FOLD_NAME)<
Seq
, State
, F
, traits::is_segmented<Seq>::type::value
>
{};
}
@ -408,7 +429,7 @@ namespace boost { namespace fusion
{
return result_of::BOOST_FUSION_FOLD_NAME<Seq,State const,F>::call(
state,
fusion::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION(seq),
seq,
f);
}
@ -422,7 +443,7 @@ namespace boost { namespace fusion
{
return result_of::BOOST_FUSION_FOLD_NAME<Seq const,State const,F>::call(
state,
fusion::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION(seq),
seq,
f);
}
@ -436,7 +457,7 @@ namespace boost { namespace fusion
{
return result_of::BOOST_FUSION_FOLD_NAME<Seq,State,F>::call(
state,
fusion::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION(seq),
seq,
f);
}
@ -450,7 +471,7 @@ namespace boost { namespace fusion
{
return result_of::BOOST_FUSION_FOLD_NAME<Seq const,State,F>::call(
state,
fusion::BOOST_FUSION_FOLD_IMPL_FIRST_IT_FUNCTION(seq),
seq,
f);
}
}}