merge from trunk

[SVN r56178]

include/boost/fusion/adapted/boost_tuple/boost_tuple_iterator.hpp

@@ -14,6 +14,9 @@
 #include <boost/mpl/if.hpp>
 #include <boost/mpl/eval_if.hpp>
 #include <boost/mpl/or.hpp>
+#include <boost/mpl/plus.hpp>
+#include <boost/mpl/int.hpp>
+#include <boost/mpl/apply.hpp>
 #include <boost/tuple/tuple.hpp>
 
 namespace boost { namespace fusion
@@ -91,6 +94,39 @@ namespace boost { namespace fusion
                 return type(iter.cons.get_tail());
             }
         };
+        
+        template <typename I1, typename I2>
+        struct distance;
+
+        // detail
+        template <typename I1, typename I2>
+        struct lazy_next_distance
+        {
+            typedef
+                typename mpl::plus<
+                    mpl::int_<1>,
+                    typename distance<
+                        typename next<I1>::type,
+                        I2
+                    >::type
+                >::type type;
+        };
+        
+        template <typename I1, typename I2>
+        struct distance
+        {
+            typedef typename mpl::eval_if<
+                boost::is_same<I1, I2>,
+                mpl::int_<0>,
+                lazy_next_distance<I1, I2>
+            >::type type;
+            
+            static type
+            call(I1 const&, I2 const&)
+            {
+                return type();
+            }
+        };
     };
 
     template <typename Null>

include/boost/fusion/algorithm/query/detail/all.hpp

@@ -108,7 +108,7 @@ namespace boost { namespace fusion { namespace detail
         template <typename It, typename F>
         static bool call(It const& it, F f)
         {
-            return false;
+            return true;
         }
     };
 

include/boost/fusion/algorithm/transformation.hpp

@@ -14,6 +14,7 @@
 #include <boost/fusion/algorithm/transformation/filter_if.hpp>
 #include <boost/fusion/algorithm/transformation/insert.hpp>
 #include <boost/fusion/algorithm/transformation/insert_range.hpp>
+#include <boost/fusion/algorithm/transformation/join.hpp> 
 #include <boost/fusion/algorithm/transformation/pop_back.hpp>
 #include <boost/fusion/algorithm/transformation/pop_front.hpp>
 #include <boost/fusion/algorithm/transformation/push_back.hpp>
@@ -24,5 +25,6 @@
 #include <boost/fusion/algorithm/transformation/replace_if.hpp>
 #include <boost/fusion/algorithm/transformation/reverse.hpp>
 #include <boost/fusion/algorithm/transformation/transform.hpp>
+#include <boost/fusion/algorithm/transformation/zip.hpp> 
 
 #endif

include/boost/fusion/algorithm/transformation/clear.hpp

@@ -16,7 +16,7 @@ namespace boost { namespace fusion
         template <typename Sequence>
         struct clear
         {
-            typedef vector0 type;
+            typedef vector0<> type;
         };
     }
 
@@ -24,7 +24,7 @@ namespace boost { namespace fusion
     inline typename result_of::clear<Sequence const>::type
     clear(Sequence const& seq)
     {
-        return vector0();
+        return vector0<>();
     }
 }}
 

include/boost/fusion/container/deque/deque_iterator.hpp

@@ -12,6 +12,7 @@
 #include <boost/fusion/container/deque/detail/keyed_element.hpp>
 #include <boost/mpl/minus.hpp>
 #include <boost/mpl/equal_to.hpp>
+#include <boost/type_traits/is_const.hpp> 
 
 namespace boost { namespace fusion {
 

include/boost/fusion/container/generation/make_vector.hpp

@@ -1,7 +1,7 @@
 /*=============================================================================
     Copyright (c) 2001-2006 Joel de Guzman
 
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
+    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)
 ==============================================================================*/
 #ifndef BOOST_PP_IS_ITERATING
@@ -19,7 +19,7 @@
 namespace boost { namespace fusion
 {
     struct void_;
-        
+
     namespace result_of
     {
         template <
@@ -28,18 +28,18 @@ namespace boost { namespace fusion
           , typename Extra = void_
         >
         struct make_vector;
-            
+
         template <>
         struct make_vector<>
         {
-            typedef vector<> type;
+            typedef vector0<> type;
         };
     }
-    
+
-    inline vector<>
+    inline vector0<>
     make_vector()
     {
-        return vector<>();
+        return vector0<>();
     }
 
 #define BOOST_FUSION_AS_FUSION_ELEMENT(z, n, data)                               \
@@ -74,15 +74,15 @@ namespace boost { namespace fusion
         struct make_vector<BOOST_PP_ENUM_PARAMS(N, T)>
 #endif
         {
-            typedef vector<BOOST_PP_ENUM(N, BOOST_FUSION_AS_FUSION_ELEMENT, _)> type;
+            typedef BOOST_PP_CAT(vector, N)<BOOST_PP_ENUM(N, BOOST_FUSION_AS_FUSION_ELEMENT, _)> type;
         };
     }
 
     template <BOOST_PP_ENUM_PARAMS(N, typename T)>
-    inline vector<BOOST_PP_ENUM(N, BOOST_FUSION_AS_FUSION_ELEMENT, _)>
+    inline BOOST_PP_CAT(vector, N)<BOOST_PP_ENUM(N, BOOST_FUSION_AS_FUSION_ELEMENT, _)>
     make_vector(BOOST_PP_ENUM_BINARY_PARAMS(N, T, const& _))
     {
-        return vector<BOOST_PP_ENUM(N, BOOST_FUSION_AS_FUSION_ELEMENT, _)>(
+        return BOOST_PP_CAT(vector, N)<BOOST_PP_ENUM(N, BOOST_FUSION_AS_FUSION_ELEMENT, _)>(
             BOOST_PP_ENUM_PARAMS(N, _));
     }
 

include/boost/fusion/container/vector/detail/as_vector.hpp

@@ -31,14 +31,14 @@ namespace boost { namespace fusion { namespace detail
         template <typename Iterator>
         struct apply
         {
-            typedef vector<> type;
+            typedef vector0<> type;
         };
 
         template <typename Iterator>
         static typename apply<Iterator>::type
         call(Iterator)
         {
-            return vector<>();
+            return vector0<>();
         }
     };
 
@@ -82,7 +82,7 @@ namespace boost { namespace fusion { namespace detail
         {
             BOOST_PP_REPEAT(N, BOOST_FUSION_NEXT_ITERATOR, _)
             BOOST_PP_REPEAT(N, BOOST_FUSION_VALUE_OF_ITERATOR, _)
-            typedef vector<BOOST_PP_ENUM_PARAMS(N, T)> type;
+            typedef BOOST_PP_CAT(vector, N)<BOOST_PP_ENUM_PARAMS(N, T)> type;
         };
 
         template <typename Iterator>

include/boost/fusion/container/vector/detail/vector_n_chooser.hpp

@@ -48,7 +48,7 @@ namespace boost { namespace fusion { namespace detail
     template <>
     struct vector_n_chooser<BOOST_PP_ENUM_PARAMS(FUSION_MAX_VECTOR_SIZE, void_ BOOST_PP_INTERCEPT)>
     {
-        typedef vector0 type;
+        typedef vector0<> type;
     };
 
 #define BOOST_PP_FILENAME_1 \

include/boost/fusion/container/vector/vector.hpp

@@ -56,7 +56,7 @@ namespace boost { namespace fusion
 
         template <typename Sequence>
         vector(Sequence const& rhs)
-#if BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1500)
             : vec(ctor_helper(rhs, is_base_of<vector, Sequence>())) {}
 #else
             : vec(rhs) {}
@@ -129,7 +129,7 @@ namespace boost { namespace fusion
 
     private:
 
-#if BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
+#if BOOST_WORKAROUND(BOOST_MSVC, <= 1500)
         static vector_n const&
         ctor_helper(vector const& rhs, mpl::true_)
         {

include/boost/fusion/container/vector/vector10.hpp

@@ -39,7 +39,8 @@ namespace boost { namespace fusion
     struct fusion_sequence_tag;
     struct random_access_traversal_tag;
 
-    struct vector0 : sequence_base<vector0>
+    template <typename Dummy = void>
+    struct vector0 : sequence_base<vector0<Dummy> >
     {
         typedef mpl::vector0<> types;
         typedef vector_tag fusion_tag;

include/boost/fusion/container/vector/vector_iterator.hpp

@@ -7,6 +7,11 @@
 #if !defined(FUSION_VECTOR_ITERATOR_05042005_0635)
 #define FUSION_VECTOR_ITERATOR_05042005_0635
 
+#if defined (BOOST_MSVC)
+#  pragma warning(push)
+#  pragma warning (disable: 4512) // assignment operator could not be generated.
+#endif
+
 #include <boost/fusion/support/iterator_base.hpp>
 #include <boost/fusion/container/vector/detail/deref_impl.hpp>
 #include <boost/fusion/container/vector/detail/value_of_impl.hpp>
@@ -42,5 +47,9 @@ namespace boost { namespace fusion
     };
 }}
 
+#if defined (BOOST_MSVC)
+#  pragma warning(pop)
+#endif
+
 #endif
 

include/boost/fusion/functional/adapter.hpp

@@ -11,8 +11,6 @@
 #include <boost/fusion/functional/adapter/fused.hpp>
 #include <boost/fusion/functional/adapter/fused_procedure.hpp>
 #include <boost/fusion/functional/adapter/fused_function_object.hpp>
-#include <boost/fusion/functional/adapter/unfused_generic.hpp>
+#include <boost/fusion/functional/adapter/unfused.hpp>
-#include <boost/fusion/functional/adapter/unfused_lvalue_args.hpp>
-#include <boost/fusion/functional/adapter/unfused_rvalue_args.hpp>
 #include <boost/fusion/functional/adapter/unfused_typed.hpp>
 #endif

include/boost/fusion/functional/adapter/limits.hpp

@@ -11,29 +11,16 @@
 
 #   include <boost/fusion/container/vector/limits.hpp>
 
-#   if !defined(BOOST_FUSION_UNFUSED_GENERIC_MAX_ARITY)
+#   if !defined(BOOST_FUSION_UNFUSED_MAX_ARITY)
-#       define BOOST_FUSION_UNFUSED_GENERIC_MAX_ARITY 6
+#       define BOOST_FUSION_UNFUSED_MAX_ARITY 6
 #   elif BOOST_FUSION_UNFUSED_GENERIC_MAX_ARITY > FUSION_MAX_VECTOR_SIZE
 #       error "BOOST_FUSION_UNFUSED_GENERIC_MAX_ARITY > FUSION_MAX_VECTOR_SIZE"
 #   endif
-#   if !defined(BOOST_FUSION_UNFUSED_RVALUE_ARGS_MAX_ARITY)
-#       define BOOST_FUSION_UNFUSED_RVALUE_ARGS_MAX_ARITY 6
-#   elif BOOST_FUSION_UNFUSED_RVALUE_ARGS_MAX_ARITY > FUSION_MAX_VECTOR_SIZE
-#       error "BOOST_FUSION_UNFUSED_RVALUE_ARGS_MAX_ARITY > FUSION_MAX_VECTOR_SIZE"
-#   endif
-#   if !defined(BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY)
-#       define BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY 6
-#   elif BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY > FUSION_MAX_VECTOR_SIZE
-#       error "BOOST_FUSION_UNFUSED_LVALUE_ARGS_MAX_ARITY > FUSION_MAX_VECTOR_SIZE"
-#   endif
 #   if !defined(BOOST_FUSION_UNFUSED_TYPED_MAX_ARITY)
 #       define BOOST_FUSION_UNFUSED_TYPED_MAX_ARITY 6
 #   elif BOOST_FUSION_UNFUSED_TYPED_MAX_ARITY > FUSION_MAX_VECTOR_SIZE
 #       error "BOOST_FUSION_UNFUSED_TYPED_MAX_ARITY > FUSION_MAX_VECTOR_SIZE"
 #   endif
-#   if !defined(BOOST_FUSION_CONSTRUCTOR_MAX_ARITY)
-#       define BOOST_FUSION_CONSTRUCTOR_MAX_ARITY 6
-#   endif
 
 #endif
 

include/boost/fusion/functional/adapter/unfused.hpp

@@ -0,0 +1,151 @@
+/*=============================================================================
+    Copyright (c) 2006-2007 Tobias Schwinger
+  
+    Use modification and distribution are subject to 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_FUNCTIONAL_ADAPTER_UNFUSED_HPP_INCLUDED)
+#if !defined(BOOST_PP_IS_ITERATING)
+
+#include <boost/preprocessor/cat.hpp>
+#include <boost/preprocessor/iteration/iterate.hpp>
+#include <boost/preprocessor/repetition/enum_params.hpp>
+#include <boost/preprocessor/repetition/enum_binary_params.hpp>
+#include <boost/preprocessor/facilities/intercept.hpp>
+
+#include <boost/utility/result_of.hpp>
+
+#include <boost/fusion/container/vector/vector.hpp>
+
+#include <boost/fusion/functional/adapter/limits.hpp>
+#include <boost/fusion/functional/adapter/detail/access.hpp>
+
+namespace boost { namespace fusion
+{
+    template <class Function, bool AllowNullary = true>
+    class unfused;
+
+    //----- ---- --- -- - -  -   -
+
+    template <class Function> 
+    class unfused<Function,true>
+      : public unfused<Function,false>
+    {
+        typedef typename detail::qf_c<Function>::type function_c;
+        typedef typename detail::qf<Function>::type function;
+        typedef typename detail::call_param<Function>::type func_const_fwd_t;
+      public:
+
+        using unfused<Function,false>::operator();
+
+        inline explicit unfused(func_const_fwd_t f = function())
+            : unfused<Function,false>(f)
+        { }
+
+        typedef typename boost::result_of<
+            function_c(fusion::vector0<> &) >::type call_const_0_result;
+
+        inline call_const_0_result operator()() const
+        {
+            fusion::vector0<> arg;
+            return this->fnc_transformed(arg);
+        }
+
+        typedef typename boost::result_of< 
+            function(fusion::vector0<> &) >::type call_0_result;
+
+        inline call_0_result operator()() 
+        {
+            fusion::vector0<> arg;
+            return this->fnc_transformed(arg);
+        }
+    };
+
+    template <class Function> class unfused<Function,false>
+    {
+      protected:
+        Function fnc_transformed;
+        typedef typename detail::qf_c<Function>::type function_c;
+        typedef typename detail::qf<Function>::type function;
+        typedef typename detail::call_param<Function>::type func_const_fwd_t;
+      public:
+
+        inline explicit unfused(func_const_fwd_t f = function())
+            : fnc_transformed(f)
+        { }
+
+        template <typename Sig>
+        struct result;
+
+        #define  BOOST_PP_FILENAME_1 \
+            <boost/fusion/functional/adapter/unfused.hpp>
+        #define  BOOST_PP_ITERATION_LIMITS \
+            (1,BOOST_FUSION_UNFUSED_MAX_ARITY)
+        #include BOOST_PP_ITERATE()
+    };
+}}
+
+namespace boost 
+{
+    template<class F>
+    struct result_of< boost::fusion::unfused<F> const () >
+    {
+        typedef typename boost::fusion::unfused<F>::call_const_0_result type;
+    };
+    template<class F>
+    struct result_of< boost::fusion::unfused<F>() >
+    {
+        typedef typename boost::fusion::unfused<F>::call_0_result type;
+    };
+}
+
+#define BOOST_FUSION_FUNCTIONAL_ADAPTER_UNFUSED_HPP_INCLUDED
+#else // defined(BOOST_PP_IS_ITERATING)
+////////////////////////////////////////////////////////////////////////////////
+//
+//  Preprocessor vertical repetition code
+//
+////////////////////////////////////////////////////////////////////////////////
+#define N BOOST_PP_ITERATION()
+
+        template <class Self, BOOST_PP_ENUM_PARAMS(N,typename T)>
+        struct result< Self const (BOOST_PP_ENUM_PARAMS(N,T)) >
+            : boost::result_of< function_c(
+                BOOST_PP_CAT(fusion::vector,N)< BOOST_PP_ENUM_BINARY_PARAMS(N,
+                    typename detail::mref<T,>::type BOOST_PP_INTERCEPT) > & )>
+        { };
+
+        template <class Self, BOOST_PP_ENUM_PARAMS(N,typename T)>
+        struct result< Self(BOOST_PP_ENUM_PARAMS(N,T)) >
+            : boost::result_of< function(
+                BOOST_PP_CAT(fusion::vector,N)< BOOST_PP_ENUM_BINARY_PARAMS(N,
+                    typename detail::mref<T,>::type BOOST_PP_INTERCEPT) > & )>
+        { };
+
+        template <BOOST_PP_ENUM_PARAMS(N,typename T)>
+        inline typename boost::result_of<function_c(BOOST_PP_CAT(fusion::vector,N)
+            <BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT)> & )>::type
+        operator()(BOOST_PP_ENUM_BINARY_PARAMS(N,T,& a)) const
+        {
+            BOOST_PP_CAT(fusion::vector,N)<
+                  BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT) >
+                arg(BOOST_PP_ENUM_PARAMS(N,a));
+            return this->fnc_transformed(arg);
+        }
+
+        template <BOOST_PP_ENUM_PARAMS(N,typename T)>
+        inline typename boost::result_of<function(BOOST_PP_CAT(fusion::vector,N)
+            <BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT)> & )>::type
+        operator()(BOOST_PP_ENUM_BINARY_PARAMS(N,T,& a)) 
+        {
+            BOOST_PP_CAT(fusion::vector,N)<
+                  BOOST_PP_ENUM_BINARY_PARAMS(N,T,& BOOST_PP_INTERCEPT) >
+                arg(BOOST_PP_ENUM_PARAMS(N,a));
+            return this->fnc_transformed(arg);
+        }
+#undef N
+#endif // defined(BOOST_PP_IS_ITERATING)
+#endif
+

include/boost/fusion/functional/generation.hpp

@@ -12,8 +12,6 @@
 #include <boost/fusion/functional/generation/make_fused.hpp>
 #include <boost/fusion/functional/generation/make_fused_procedure.hpp>
 #include <boost/fusion/functional/generation/make_fused_function_object.hpp>
-#include <boost/fusion/functional/generation/make_unfused_generic.hpp>
+#include <boost/fusion/functional/generation/make_unfused.hpp>
-#include <boost/fusion/functional/generation/make_unfused_lvalue_args.hpp>
-#include <boost/fusion/functional/generation/make_unfused_rvalue_args.hpp>
 
 #endif

include/boost/fusion/functional/generation/make_unfused.hpp

@@ -0,0 +1,18 @@
+/*=============================================================================
+    Copyright (c) 2007 Tobias Schwinger
+  
+    Use modification and distribution are subject to 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_FUNCTIONAL_GENERATION_MAKE_UNFUSED_HPP_INCLUDED)
+#define BOOST_FUSION_FUNCTIONAL_GENERATION_MAKE_UNFUSED_HPP_INCLUDED
+
+#include <boost/fusion/functional/adapter/unfused.hpp>
+
+#define BOOST_FUSION_CLASS_TPL_NAME unfused
+#include <boost/fusion/functional/generation/detail/gen_make_adapter.hpp>
+
+#endif
+

include/boost/fusion/include/remove.hpp

@@ -4,9 +4,9 @@
     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(FUSION_INCLUDE_REMOVE_IF)
+#if !defined(FUSION_INCLUDE_REMOVE)
-#define FUSION_INCLUDE_REMOVE_IF
+#define FUSION_INCLUDE_REMOVE
 
-#include <boost/fusion/algorithm/transformation/remove_if.hpp>
+#include <boost/fusion/algorithm/transformation/remove.hpp>
 
 #endif

include/boost/fusion/iterator/iterator_facade.hpp

@@ -1,7 +1,7 @@
 /*=============================================================================
     Copyright (c) 2001-2006 Joel de Guzman
 
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
+    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(FUSION_ITERATOR_FACADE_09252006_1011)
@@ -9,6 +9,7 @@
 
 #include <boost/fusion/support/iterator_base.hpp>
 #include <boost/fusion/iterator/detail/advance.hpp>
+#include <boost/fusion/iterator/detail/distance.hpp>
 #include <boost/fusion/support/category_of.hpp>
 #include <boost/type_traits/is_same.hpp>
 #include <boost/mpl/assert.hpp>
@@ -44,6 +45,13 @@ namespace boost { namespace fusion
         {
             BOOST_MPL_ASSERT_NOT((traits::is_random_access<Iterator>));
         };
+
+        // default implementation
+        template <typename First, typename Last>
+        struct distance :
+            distance_detail::linear_distance<First, Last>
+        {
+        };
     };
 }}
 

include/boost/fusion/support/deduce.hpp

@@ -87,6 +87,18 @@ namespace boost { namespace fusion { namespace traits
 
     // Keep references on arrays, even if const
 
+    template <typename T, int N>
+    struct deduce<T(&)[N]>
+    {
+        typedef T(&type)[N];
+    };
+
+    template <typename T, int N>
+    struct deduce<volatile T(&)[N]>
+    {
+        typedef volatile T(&type)[N]; 
+    };
+
     template <typename T, int N>
     struct deduce<const T(&)[N]>
     {

include/boost/fusion/support/tag_of.hpp

@@ -85,11 +85,11 @@ namespace boost { namespace fusion
     {
         template <typename Sequence, typename Active>
         struct tag_of
-          : mpl::if_< detail::is_mpl_sequence<Sequence>,
+          : mpl::if_< fusion::detail::is_mpl_sequence<Sequence>,
               mpl::identity<mpl_sequence_tag>,
               mpl::identity<non_fusion_tag> >::type
         {
-            BOOST_MPL_ASSERT_NOT((detail::is_specialized<Sequence>));
+            BOOST_MPL_ASSERT_NOT((fusion::detail::is_specialized<Sequence>));
         };
 
         template <typename Sequence>

include/boost/fusion/support/unused.hpp

@@ -1,7 +1,7 @@
 /*=============================================================================
     Copyright (c) 2001-2006 Joel de Guzman
 
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
+    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_SUPPORT_UNUSED_20070305_1038)
@@ -13,7 +13,10 @@
 # pragma warning(disable: 4522) // multiple assignment operators specified warning
 #endif
 
-namespace boost { namespace fusion {
+#define BOOST_FUSION_UNUSED_HAS_IO
+
+namespace boost { namespace fusion
+{
     struct unused_type
     {
         unused_type()
@@ -53,6 +56,26 @@ namespace boost { namespace fusion {
     };
 
     unused_type const unused = unused_type();
+
+    namespace detail
+    {
+        struct unused_only
+        {
+            unused_only(unused_type const&) {}
+        };
+    }
+
+    template <typename Out>
+    inline Out& operator<<(Out& out, detail::unused_only const&)
+    {
+        return out;
+    }
+
+    template <typename In>
+    inline In& operator>>(In& in, unused_type&)
+    {
+        return in;
+    }
 }}
 
 #if defined(BOOST_MSVC)

include/boost/fusion/view/ext_/segmented_iterator.hpp

@@ -327,8 +327,8 @@ namespace boost { namespace fusion
         typedef typename Cons::car_type car_type;
         typedef typename Cons::cdr_type cdr_type;
 
-        explicit segmented_iterator(Cons const &cons)
+        explicit segmented_iterator(Cons const &c)
-          : cons_(cons)
+          : cons_(c)
         {}
 
         cons_type const &cons() const { return this->cons_; };