From b83a2954f5a1ed5b0886f4980395cd2a59a23681 Mon Sep 17 00:00:00 2001
From: Eric Niebler <eric@boostpro.com>
Date: Thu, 11 Aug 2011 17:28:17 +0000
Subject: [PATCH] segmented_fold_until should unpack the state's value before
 invoking the user's function

[SVN r73668]
---
 include/boost/fusion/algorithm/iteration/ext_/fold_s.hpp  | 4 ++--
 include/boost/fusion/view/ext_/segmented_fold_until.hpp   | 8 ++++++--
 .../boost/fusion/view/ext_/segmented_iterator_range.hpp   | 1 -
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/boost/fusion/algorithm/iteration/ext_/fold_s.hpp b/include/boost/fusion/algorithm/iteration/ext_/fold_s.hpp
index 78d5d8e8..13908f97 100644
--- a/include/boost/fusion/algorithm/iteration/ext_/fold_s.hpp
+++ b/include/boost/fusion/algorithm/iteration/ext_/fold_s.hpp
@@ -23,7 +23,7 @@ namespace boost { namespace fusion { namespace detail
         {
             typedef
                 fusion::result<
-                    typename result_of::fold<Range, typename State::value_type, Fun>::type,
+                    typename result_of::fold<Range, State, Fun>::type,
                     continue_
                 >
             type;
@@ -37,7 +37,7 @@ namespace boost { namespace fusion { namespace detail
         typename result<segmented_fold_fun(Range&, State const&, Context const&)>::type
         operator()(Range& rng, State const& state, Context const&) const
         {
-            return fusion::fold(rng, state.value, fun);
+            return fusion::fold(rng, state, fun);
         }
 
         Fun const& fun;
diff --git a/include/boost/fusion/view/ext_/segmented_fold_until.hpp b/include/boost/fusion/view/ext_/segmented_fold_until.hpp
index 85392073..799da3cd 100644
--- a/include/boost/fusion/view/ext_/segmented_fold_until.hpp
+++ b/include/boost/fusion/view/ext_/segmented_fold_until.hpp
@@ -216,12 +216,16 @@ namespace boost { namespace fusion
         struct segmented_fold_until_impl<Range, State, Context, Fun, false>
         {
             typedef
-                typename boost::result_of<Fun(Range&, State const&, Context const&)>::type
+                typename boost::result_of<Fun(
+                    Range&,
+                    typename add_reference<typename add_const<typename State::value_type>::type>::type,
+                    Context const&
+                )>::type
             type;
             
             static type call(Range& rng, State const& state, Context const& context, Fun const& fun)
             {
-                return fun(rng, state, context);
+                return fun(rng, state.value, context);
             }
         };
 
diff --git a/include/boost/fusion/view/ext_/segmented_iterator_range.hpp b/include/boost/fusion/view/ext_/segmented_iterator_range.hpp
index 209faee5..57de282d 100644
--- a/include/boost/fusion/view/ext_/segmented_iterator_range.hpp
+++ b/include/boost/fusion/view/ext_/segmented_iterator_range.hpp
@@ -539,7 +539,6 @@ namespace boost { namespace fusion { namespace extension
         };
     };
 
-    // TODO: remove invocation of distance in iterator_range.
     // TODO: default implementation of begin, end, and size
     //       should check if the sequence is segmented and to
     //       the right thing.