feedc0de/boost_fusion
1
0
Fork 0
forked from boostorg/fusion
Code Pull Requests Activity

make for_each aware of segments

Browse Source 
[SVN r73899]
This commit is contained in:
Eric Niebler
2011-08-18 22:09:59 +00:00
parent b8bb98a36b
commit 5ff6210759
5 changed files with 56 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/boost/fusion/algorithm/iteration/detail/for_each.hpp
View File

@ -13,6 +13,7 @@
#include <boost/fusion/iterator/next.hpp>
#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/iterator/distance.hpp>
#include <boost/fusion/support/category_of.hpp>
#include <boost/mpl/bool.hpp>
namespace boost { namespace fusion {
@ -36,7 +37,7 @@ namespace detail
template <typename Sequence, typename F, typename Tag>
inline void
for_each(Sequence& seq, F const& f, Tag)
for_each_dispatch(Sequence& seq, F const& f, Tag)
{
detail::for_each_linear(
fusion::begin(seq)
@ -117,12 +118,19 @@ namespace detail
template <typename Sequence, typename F>
inline void
for_each(Sequence& seq, F const& f, random_access_traversal_tag)
for_each_dispatch(Sequence& seq, F const& f, random_access_traversal_tag)
{
typedef typename result_of::begin<Sequence>::type begin;
typedef typename result_of::end<Sequence>::type end;
for_each_unrolled<result_of::distance<begin, end>::type::value>::call(fusion::begin(seq), f);
}
template <typename Sequence, typename F>
inline void
for_each(Sequence& seq, F const& f, mpl::false_) // unsegmented implementation
{
detail::for_each_dispatch(seq, f, typename traits::category_of<Sequence>::type());
}
}}}

48
include/boost/fusion/algorithm/iteration/detail/segmented_for_each.hpp Normal file
View File

@ -0,0 +1,48 @@
/*=============================================================================
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_FOR_EACH_HPP_INCLUDED)
#define BOOST_FUSION_SEGMENTED_FOR_EACH_HPP_INCLUDED
#include <boost/mpl/bool.hpp>
#include <boost/fusion/support/void.hpp>
#include <boost/fusion/algorithm/iteration/for_each_fwd.hpp>
#include <boost/fusion/support/segmented_fold_until.hpp>
namespace boost { namespace fusion { namespace detail
{
template <typename Fun>
struct segmented_for_each_fun
{
explicit segmented_for_each_fun(Fun const& f)
: fun(f)
{}
Fun const& fun;
template <typename Sequence, typename State, typename Context>
struct apply
{
typedef void_ type;
typedef mpl::true_ continue_type;
static type call(Sequence& seq, State const&, Context const&, segmented_for_each_fun const& fun)
{
fusion::for_each(seq, fun.fun);
return void_();
}
};
};
template <typename Sequence, typename F>
inline void
for_each(Sequence& seq, F const& f, mpl::true_) // segmented implementation
{
fusion::segmented_fold_until(seq, void_(), segmented_for_each_fun<F>(f));
}
}}}
#endif