diff --git a/doc/fusion.qbk b/doc/fusion.qbk
index 0a24cb32..6d6987d5 100644
--- a/doc/fusion.qbk
+++ b/doc/fusion.qbk
@@ -2,6 +2,7 @@
     Copyright (C) 2001-2011 Joel de Guzman
     Copyright (C) 2006 Dan Marsden
     Copyright (C) 2010 Christopher Schmidt
+    Copyright (C) 2018 Kohei Takahashi
 
     Use, modification and distribution is subject to the Boost Software
     License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@@ -20,39 +21,37 @@
     ]
 ]
 
-[def __spirit__                 [@http://spirit.sourceforge.net Spirit]]
-[def __phoenix__                [@http://www.boost.org/libs/phoenix/index.html Phoenix]]
-[def __mpl__                    [@http://www.boost.org/libs/mpl/index.html MPL]]
+[def __spirit__                 [@http://boost-spirit.com/home/ Spirit]]
+[def __phoenix__                [@http://www.boost.org/libs/phoenix Phoenix]]
+[def __mpl__                    [@http://www.boost.org/libs/mpl MPL]]
 [def __stl__                    [@http://en.wikipedia.org/wiki/Standard_Template_Library STL]]
-[def __tuple__                  [@http://www.boost.org/libs/tuple/doc/tuple_users_guide.html Boost.Tuple]]
+[def __tuple__                  [@http://www.boost.org/libs/tuple Boost.Tuple]]
 [def __tr1__tuple__             [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf TR1 Tuple]]
 [def __boost_tools__            [@http://www.boost.org/tools/index.html Boost Tools]]
-[def __spirit_list__            [@https://lists.sourceforge.net/lists/listinfo/spirit-general Spirit Mailing List]]
-[def __spirit_general__         [@news://news.gmane.org/gmane.comp.spirit.general Spirit General NNTP news portal]]
-[def __gmane__                  [@http://www.gmane.org Gmane]]
-[def __mlist_archive__          [@http://news.gmane.org/gmane.comp.parsers.spirit.general]]
+[def __spirit_list__            [@https://sourceforge.net/projects/spirit/lists/spirit-general Spirit Mailing List]]
+[def __list_archive__           [@https://sourceforge.net/p/spirit/mailman/spirit-general/ archive]]
 [def __jaakko_jarvi__           [@http://www.boost.org/people/jaakko_jarvi.htm Jaakko Jarvi]]
 [def __david_abrahams__         [@http://www.boost.org/people/dave_abrahams.htm David Abrahams]]
 [def __the_forwarding_problem__ [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1385.htm The Forwarding Problem]]
 
-[def __boost_any__              [@http://www.boost.org/doc/html/any.html Boost.Any]]
+[def __boost_any__              [@http://www.boost.org/libs/any Boost.Any Library]]
 [def __new_iterator_concepts__  [@http://www.boost.org/libs/iterator/doc/new-iter-concepts.html New Iterator Concepts]]
-[def __boost_array_library__    [@http://www.boost.org/doc/html/array.html Boost.Array Library]]
-[def __boost_variant_library__  [@http://www.boost.org/doc/html/variant.html Boost.Variant Library]]
-[def __boost_tuple_library__    [@http://www.boost.org/libs/tuple/doc/tuple_users_guide.html Boost.Tuple Library]]
-[def __boost_ref__              [@http://www.boost.org/doc/html/ref.html Boost.Ref]]
-[def __boost_ref_call__         [@http://www.boost.org/doc/html/ref.html `ref`]]
-[def __boost_result_of__        [@http://www.boost.org/libs/utility/utility.htm#result_of Boost.ResultOf]]
+[def __boost_array_library__    [@http://www.boost.org/libs/array Boost.Array Library]]
+[def __boost_variant_library__  [@http://www.boost.org/libs/variant Boost.Variant Library]]
+[def __boost_tuple_library__    [@http://www.boost.org/libs/tuple Boost.Tuple Library]]
+[def __boost_ref__              [@http://www.boost.org/libs/core/ref.html Ref utility]]
+[def __boost_ref_call__         [@http://www.boost.org/libs/core/ref.html `ref`]]
+[def __boost_result_of__        [@http://www.boost.org/libs/utility/utility.htm#result_of ResultOf utility]]
 [def __boost_result_of_call__   [@http://www.boost.org/libs/utility/utility.htm#result_of `boost::result_of`]]
-[def __boost_enable_if__        [@http://www.boost.org/libs/utility/enable_if.html Boost.EnableIf utility]]
-[def __boost_shared_ptr_call__  [@http://www.boost.org/libs/smart_ptr/shared_ptr.htm `boost::shared_ptr`]]
-[def __boost_func_forward__     [@http://www.boost.org/libs/functional/forward/doc/html/index.html Boost.Functional/Forward]]
-[def __boost_func_factory__     [@http://www.boost.org/libs/functional/factory/doc/html/index.html Boost.Functional/Factory]]
-[def __boost_func_hash__        [@http://www.boost.org/doc/html/hash.html Boost.Functional/Hash]]
-[def __std_pair_doc__           [@http://www.sgi.com/tech/stl/pair.html `std::pair`]]
+[def __boost_enable_if__        [@http://www.boost.org/libs/core/doc/html/core/enable_if.html EnableIf utility]]
+[def __boost_shared_ptr_call__  [@http://www.boost.org/libs/smart_ptr#shared_ptr `boost::shared_ptr`]]
+[def __boost_func_forward__     [@http://www.boost.org/libs/functional/forward Boost.Functional/Forward Library]]
+[def __boost_func_factory__     [@http://www.boost.org/libs/functional/factory Boost.Functional/Factory Library]]
+[def __boost_func_hash__        [@http://www.boost.org/doc/html/hash.html Boost.ContainerHash Library]]
+[def __std_pair_doc__           [@http://en.cppreference.com/w/cpp/utility/pair `std::pair`]]
 [def __std_tuple_doc__          [@http://en.cppreference.com/w/cpp/utility/tuple `std::tuple`]]
-[def __std_plus_doc__           [@http://www.sgi.com/tech/stl/plus.html `std::plus`]]
-[def __std_minus_doc__          [@http://www.sgi.com/tech/stl/minus.html `std::minus`]]
+[def __std_plus_doc__           [@http://en.cppreference.com/w/cpp/utility/functional/plus `std::plus`]]
+[def __std_minus_doc__          [@http://en.cppreference.com/w/cpp/utility/functional/minus `std::minus`]]
 
 [def __mpl_integral_constant__  [@http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html MPL Integral Constant]]
 [def __mpl_boolean_constant__   [@http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html MPL Boolean Constant]]
diff --git a/doc/preface.qbk b/doc/preface.qbk
index 2fff963a..a6ab573f 100644
--- a/doc/preface.qbk
+++ b/doc/preface.qbk
@@ -61,11 +61,8 @@ tool. QuickBook can be found in the __boost_tools__.
 [heading Support]
 
 Please direct all questions to Spirit's mailing list. You can subscribe to the
-__spirit_list__. The mailing list has a searchable archive. A search link to
-this archive is provided in __spirit__'s home page. You may also read and post
-messages to the mailing list through __spirit_general__ (thanks to __gmane__).
-The news group mirrors the mailing list. Here is a link to the archives:
-__mlist_archive__.
+__spirit_list__. The mailing list has a searchable archive. Here is a link to
+the archives: __list_archive__.
 
 [endsect]
 
diff --git a/doc/references.qbk b/doc/references.qbk
index d0d63019..a07815d4 100644
--- a/doc/references.qbk
+++ b/doc/references.qbk
@@ -1,6 +1,7 @@
 [/==============================================================================
     Copyright (C) 2001-2011 Joel de Guzman
     Copyright (C) 2006 Dan Marsden
+    Copyright (C) 2018 Kohei Takahashi
 
     Use, modification and distribution is subject to the Boost Software
     License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@@ -8,20 +9,20 @@
 ===============================================================================/]
 [section References]
 
-# [@http://boost.org/libs/iterator/doc/new-iter-concepts.html New Iterator Concepts],
+# [@http://www.boost.org/libs/iterator/doc/new-iter-concepts.html New Iterator Concepts],
   David Abrahams, Jeremy Siek, Thomas Witt, 2004-11-01.
-# [@http://boost.org/libs/tuple/doc/tuple_users_guide.html The Boost Tuple Library],
+# [@http://www.boost.org/libs/tuple The Boost Tuple Library],
   Jaakko Jarvi, 2001.
-# [@http://www.boost.org/libs/spirit/ Spirit Parser Library],
+# [@http://www.boost.org/libs/spirit Spirit Parser Library],
   Joel de Guzman, 2001-2006.
-# [@http://www.boost.org/libs/mpl/ The Boost MPL Library],
+# [@http://www.boost.org/libs/mpl The Boost MPL Library],
   Aleksey Gurtovoy and David Abrahams, 2002-2004.
-# [@http://www.boost.org/doc/html/array.html Boost Array],
+# [@http://www.boost.org/libs/array The Boost Array Library],
   Nicolai Josuttis, 2002-2004.
-# [@http://www.sgi.com/tech/stl/ Standard Template Library Programmer's Guide],
-  Hewlett-Packard Company, 1994.
-# [@http://www.boost.org/doc/html/ref.html Boost.Ref],
+# [@http://www.boost.org/libs/core/ref.html Boost.Core / Ref utility],
   Jaakko Jarvi, Peter Dimov, Douglas Gregor, Dave Abrahams, 1999-2002.
+# [@http://www.boost.org/libs/hana The Boost Hana Library],
+  Louis Dionne, 2017.
 
 [endsect]
 
diff --git a/include/boost/fusion/container/deque/detail/cpp03/as_deque.hpp b/include/boost/fusion/container/deque/detail/cpp03/as_deque.hpp
index e95daf3a..860a2a29 100644
--- a/include/boost/fusion/container/deque/detail/cpp03/as_deque.hpp
+++ b/include/boost/fusion/container/deque/detail/cpp03/as_deque.hpp
@@ -26,7 +26,13 @@ namespace boost { namespace fusion { namespace detail
 BOOST_FUSION_BARRIER_BEGIN
 
     template <int size>
-    struct as_deque;
+    struct as_deque
+    {
+        BOOST_STATIC_ASSERT_MSG(
+            size <= FUSION_MAX_DEQUE_SIZE
+          , "FUSION_MAX_DEQUE_SIZE limit is too low"
+        );
+    };
 
     template <>
     struct as_deque<0>
diff --git a/include/boost/fusion/container/map/detail/cpp03/as_map.hpp b/include/boost/fusion/container/map/detail/cpp03/as_map.hpp
index efa836ba..442c350c 100644
--- a/include/boost/fusion/container/map/detail/cpp03/as_map.hpp
+++ b/include/boost/fusion/container/map/detail/cpp03/as_map.hpp
@@ -25,7 +25,13 @@ namespace boost { namespace fusion { namespace detail
 BOOST_FUSION_BARRIER_BEGIN
 
     template <int size, bool is_assoc>
-    struct as_map;
+    struct as_map
+    {
+        BOOST_STATIC_ASSERT_MSG(
+            size <= FUSION_MAX_MAP_SIZE
+          , "FUSION_MAX_MAP_SIZE limit is too low"
+        );
+    };
 
     template <bool is_assoc>
     struct as_map<0, is_assoc>
diff --git a/include/boost/fusion/container/map/detail/map_impl.hpp b/include/boost/fusion/container/map/detail/map_impl.hpp
index c62145ba..360c5d09 100644
--- a/include/boost/fusion/container/map/detail/map_impl.hpp
+++ b/include/boost/fusion/container/map/detail/map_impl.hpp
@@ -125,11 +125,7 @@ namespace boost { namespace fusion { namespace detail
         }
 
         BOOST_FUSION_GPU_ENABLED
-        value_type get_val(mpl::identity<key_type>);
-        BOOST_FUSION_GPU_ENABLED
-        pair_type get_val(mpl::int_<index>);
-        BOOST_FUSION_GPU_ENABLED
-        value_type get_val(mpl::identity<key_type>) const;
+        mpl::identity<value_type> get_val(mpl::identity<key_type>) const;
         BOOST_FUSION_GPU_ENABLED
         pair_type get_val(mpl::int_<index>) const;
 
diff --git a/include/boost/fusion/container/map/detail/value_at_key_impl.hpp b/include/boost/fusion/container/map/detail/value_at_key_impl.hpp
index 94d2da47..da6259e6 100644
--- a/include/boost/fusion/container/map/detail/value_at_key_impl.hpp
+++ b/include/boost/fusion/container/map/detail/value_at_key_impl.hpp
@@ -1,5 +1,6 @@
 /*=============================================================================
     Copyright (c) 2001-2013 Joel de Guzman
+    Copyright (c) 2018 Kohei Takahashi
 
     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)
@@ -8,10 +9,6 @@
 #define BOOST_FUSION_MAP_DETAIL_VALUE_AT_KEY_IMPL_02042013_0821
 
 #include <boost/fusion/support/config.hpp>
-#include <boost/fusion/support/detail/access.hpp>
-#include <boost/type_traits/is_const.hpp>
-#include <boost/mpl/at.hpp>
-#include <boost/mpl/identity.hpp>
 #include <boost/utility/declval.hpp>
 
 namespace boost { namespace fusion
@@ -29,9 +26,9 @@ namespace boost { namespace fusion
             template <typename Sequence, typename Key>
             struct apply
             {
-                typedef
-                    decltype(boost::declval<Sequence>().get_val(mpl::identity<Key>()))
-                type;
+                typedef typename BOOST_FUSION_IDENTIFIED_TYPE((
+                    boost::declval<Sequence>().get_val(mpl::identity<Key>())
+                )) type;
             };
         };
     }
diff --git a/include/boost/fusion/container/set/detail/cpp03/as_set.hpp b/include/boost/fusion/container/set/detail/cpp03/as_set.hpp
index c9159314..ec73a158 100644
--- a/include/boost/fusion/container/set/detail/cpp03/as_set.hpp
+++ b/include/boost/fusion/container/set/detail/cpp03/as_set.hpp
@@ -25,7 +25,13 @@ namespace boost { namespace fusion { namespace detail
 BOOST_FUSION_BARRIER_BEGIN
 
     template <int size>
-    struct as_set;
+    struct as_set
+    {
+        BOOST_STATIC_ASSERT_MSG(
+            size <= FUSION_MAX_SET_SIZE
+          , "FUSION_MAX_SET_SIZE limit is too low"
+        );
+    };
 
     template <>
     struct as_set<0>
diff --git a/include/boost/fusion/container/vector/detail/cpp03/as_vector.hpp b/include/boost/fusion/container/vector/detail/cpp03/as_vector.hpp
index bd7fa76b..471f7840 100644
--- a/include/boost/fusion/container/vector/detail/cpp03/as_vector.hpp
+++ b/include/boost/fusion/container/vector/detail/cpp03/as_vector.hpp
@@ -25,7 +25,13 @@ namespace boost { namespace fusion { namespace detail
 BOOST_FUSION_BARRIER_BEGIN
 
     template <int size>
-    struct as_vector;
+    struct as_vector
+    {
+        BOOST_STATIC_ASSERT_MSG(
+            size <= FUSION_MAX_VECTOR_SIZE
+          , "FUSION_MAX_VECTOR_SIZE limit is too low"
+        );
+    };
 
     template <>
     struct as_vector<0>
diff --git a/include/boost/fusion/container/vector/detail/value_at_impl.hpp b/include/boost/fusion/container/vector/detail/value_at_impl.hpp
index a2b9b2f6..a2dd5fcd 100644
--- a/include/boost/fusion/container/vector/detail/value_at_impl.hpp
+++ b/include/boost/fusion/container/vector/detail/value_at_impl.hpp
@@ -1,5 +1,5 @@
 /*=============================================================================
-    Copyright (c) 2014 Kohei Takahashi
+    Copyright (c) 2014,2018 Kohei Takahashi
 
     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)
@@ -7,7 +7,6 @@
 #ifndef FUSION_VALUE_AT_IMPL_16122014_1641
 #define FUSION_VALUE_AT_IMPL_16122014_1641
 
-#include <boost/config.hpp>
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/container/vector/detail/config.hpp>
 
@@ -23,6 +22,7 @@
 ///////////////////////////////////////////////////////////////////////////////
 #include <boost/fusion/container/vector/vector_fwd.hpp>
 #include <boost/type_traits/declval.hpp>
+#include <boost/mpl/identity.hpp>
 
 namespace boost { namespace fusion
 {
@@ -35,7 +35,7 @@ namespace boost { namespace fusion
 
         template <std::size_t N, typename U>
         static inline BOOST_FUSION_GPU_ENABLED
-        U value_at_impl(store<N, U> const volatile*);
+        mpl::identity<U> value_at_impl(store<N, U> const volatile*);
     }
 
     namespace extension
@@ -49,9 +49,9 @@ namespace boost { namespace fusion
             template <typename Sequence, typename N>
             struct apply
             {
-                typedef
-                    decltype(vector_detail::value_at_impl<N::value>(boost::declval<Sequence*>()))
-                type;
+                typedef typename BOOST_FUSION_IDENTIFIED_TYPE((
+                    vector_detail::value_at_impl<N::value>(boost::declval<Sequence*>())
+                )) type;
             };
         };
     }
diff --git a/include/boost/fusion/support/config.hpp b/include/boost/fusion/support/config.hpp
index 23554531..65fe2f35 100644
--- a/include/boost/fusion/support/config.hpp
+++ b/include/boost/fusion/support/config.hpp
@@ -1,6 +1,6 @@
 /*=============================================================================
     Copyright (c) 2014 Eric Niebler
-    Copyright (c) 2014 Kohei Takahashi
+    Copyright (c) 2014,2018 Kohei Takahashi
 
     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)
@@ -96,4 +96,16 @@ namespace std
 #define BOOST_FUSION_CONSTEXPR_THIS BOOST_CONSTEXPR
 #endif
 
+
+// Workaround for compiler which doesn't compile decltype(expr)::type.
+// It expects decltype(expr) deduced as mpl::identity<T>.
+#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1913))
+#   include <boost/mpl/identity.hpp>
+#   define BOOST_FUSION_IDENTIFIED_TYPE(parenthesized_expr) \
+        boost::mpl::identity<decltype parenthesized_expr>::type::type
+#else
+#   define BOOST_FUSION_IDENTIFIED_TYPE(parenthesized_expr) \
+        decltype parenthesized_expr ::type
+#endif
+
 #endif
diff --git a/include/boost/fusion/support/detail/is_mpl_sequence.hpp b/include/boost/fusion/support/detail/is_mpl_sequence.hpp
index 1c485f91..24b86624 100644
--- a/include/boost/fusion/support/detail/is_mpl_sequence.hpp
+++ b/include/boost/fusion/support/detail/is_mpl_sequence.hpp
@@ -13,6 +13,7 @@
 #include <boost/mpl/is_sequence.hpp>
 #include <boost/mpl/and.hpp>
 #include <boost/mpl/not.hpp>
+#include <boost/type_traits/is_complete.hpp>
 #include <boost/type_traits/is_convertible.hpp>
 
 namespace boost { namespace fusion { namespace detail
@@ -20,7 +21,7 @@ namespace boost { namespace fusion { namespace detail
     template <typename T>
     struct is_mpl_sequence
         : mpl::and_<
-            mpl::not_<is_convertible<T, from_sequence_convertible_type> >
+            mpl::not_<mpl::and_<is_complete<T>, is_convertible<T, from_sequence_convertible_type> > >
           , mpl::is_sequence<T> >
     {};
 }}}
diff --git a/include/boost/fusion/support/is_sequence.hpp b/include/boost/fusion/support/is_sequence.hpp
index 6b9b2118..af7c84e1 100644
--- a/include/boost/fusion/support/is_sequence.hpp
+++ b/include/boost/fusion/support/is_sequence.hpp
@@ -10,9 +10,11 @@
 #include <boost/fusion/support/config.hpp>
 #include <boost/fusion/support/sequence_base.hpp>
 #include <boost/fusion/support/tag_of.hpp>
+#include <boost/mpl/and.hpp>
+#include <boost/mpl/bool.hpp>
 #include <boost/mpl/is_sequence.hpp>
 #include <boost/mpl/or.hpp>
-#include <boost/mpl/bool.hpp>
+#include <boost/type_traits/is_complete.hpp>
 #include <boost/type_traits/is_convertible.hpp>
 #include <boost/type_traits/is_same.hpp>
 
@@ -69,7 +71,10 @@ namespace boost { namespace fusion
 
         template <typename Sequence, typename Enable = void>
         struct is_native_fusion_sequence
-          : is_convertible<Sequence, fusion::detail::from_sequence_convertible_type>
+          : mpl::and_<
+            is_complete<Sequence>,
+            is_convertible<Sequence, fusion::detail::from_sequence_convertible_type>
+          >
         {};
     }
 }}
diff --git a/test/Jamfile b/test/Jamfile
index 82d715bb..9492e83f 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -237,6 +237,7 @@ project
     [ run sequence/ref_vector.cpp ]
     [ run sequence/flatten_view.cpp ]
     [ compile sequence/github-159.cpp ]
+    [ run sequence/github-176.cpp ]
 
     [ compile sequence/size.cpp ]
 
@@ -254,6 +255,7 @@ project
     [ run functional/invoke_procedure.cpp ]
     [ run sequence/swap.cpp ]
 
+    [ compile support/is_sequence.cpp ]
     [ compile support/pair_deque.cpp ]
     [ compile support/pair_list.cpp ]
     [ compile support/pair_map.cpp ]
@@ -264,6 +266,7 @@ project
         : [ requires cxx11_variadic_templates ] ]
     [ compile support/and.cpp
         : [ requires cxx11_variadic_templates ] ]
+    [ compile support/tag_of.cpp ]
 
 #   [ compile-fail xxx.cpp  ]
 
diff --git a/test/sequence/deque_move.cpp b/test/sequence/deque_move.cpp
index b3675b24..b3bdf11b 100644
--- a/test/sequence/deque_move.cpp
+++ b/test/sequence/deque_move.cpp
@@ -5,7 +5,7 @@
     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)
 ==============================================================================*/
-#define BOOST_FUSION_DONT_USE_PREPROCESSED_FILES // $$$ JDG temp $$$
+#define BOOST_FUSION_DONT_USE_PREPROCESSED_FILES
 #include <boost/fusion/container/deque/deque.hpp>
 
 #define FUSION_SEQUENCE boost::fusion::deque<std::vector<x>>
diff --git a/test/sequence/github-176.cpp b/test/sequence/github-176.cpp
new file mode 100644
index 00000000..82960e9a
--- /dev/null
+++ b/test/sequence/github-176.cpp
@@ -0,0 +1,86 @@
+/*=============================================================================
+    Copyright (c) 2018 Kohei Takahashi
+
+    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)
+==============================================================================*/
+
+#include <boost/fusion/sequence/intrinsic/at.hpp>
+#include <boost/fusion/sequence/intrinsic/at_key.hpp>
+#include <boost/fusion/container/vector.hpp>
+#include <boost/fusion/container/list.hpp>
+#include <boost/fusion/container/deque.hpp>
+#include <boost/fusion/container/map.hpp>
+#include <boost/fusion/container/set.hpp>
+#include <boost/fusion/tuple/tuple.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+template <typename Sequence>
+void test_at()
+{
+    Sequence seq;
+
+    // zero initialized
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 0);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 0);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 0);
+
+    int (&arr)[3] = boost::fusion::deref(boost::fusion::begin(seq));
+
+    arr[0] = 2;
+    arr[1] = 4;
+    arr[2] = 6;
+
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 2);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 4);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 6);
+
+    boost::fusion::at_c<0>(seq)[1] = 42;
+
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[0] == 2);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[1] == 42);
+    BOOST_TEST(boost::fusion::at_c<0>(seq)[2] == 6);
+}
+
+template <typename T> inline T& value(T& v) { return v; }
+template <typename K, typename T> inline T& value(boost::fusion::pair<K, T>& v) { return v.second; }
+
+template <typename Sequence>
+void test_at_key()
+{
+    Sequence seq;
+
+    // zero initialized
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[0] == 0);
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[1] == 0);
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[2] == 0);
+
+    int (&arr)[3] = value(boost::fusion::deref(boost::fusion::begin(seq)));
+
+    arr[0] = 2;
+    arr[1] = 4;
+    arr[2] = 6;
+
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[0] == 2);
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[1] == 4);
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[2] == 6);
+
+    boost::fusion::at_key<int[3]>(seq)[1] = 42;
+
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[0] == 2);
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[1] == 42);
+    BOOST_TEST(boost::fusion::at_key<int[3]>(seq)[2] == 6);
+}
+
+int main()
+{
+    using namespace boost::fusion;
+
+    test_at<vector<int[3]> >();
+    test_at<deque<int[3]> >();
+    test_at<list<int[3]> >();
+    test_at<tuple<int[3]> >();
+
+    test_at_key<set<int[3]> >();
+    test_at_key<map<pair<int[3], int[3]> > >();
+}
diff --git a/test/sequence/map_move.cpp b/test/sequence/map_move.cpp
index fcac58aa..9f9dd004 100644
--- a/test/sequence/map_move.cpp
+++ b/test/sequence/map_move.cpp
@@ -5,7 +5,7 @@
     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)
 ==============================================================================*/
-#define BOOST_FUSION_DONT_USE_PREPROCESSED_FILES // $$$ JDG temp $$$
+#define BOOST_FUSION_DONT_USE_PREPROCESSED_FILES
 #include <boost/fusion/container/map/map.hpp>
 
 struct k1 {};
diff --git a/test/sequence/vector_move.cpp b/test/sequence/vector_move.cpp
index 4e5ae7c8..3e9f0b6a 100644
--- a/test/sequence/vector_move.cpp
+++ b/test/sequence/vector_move.cpp
@@ -5,7 +5,7 @@
     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)
 ==============================================================================*/
-#define BOOST_FUSION_DONT_USE_PREPROCESSED_FILES // $$$ JDG temp $$$
+#define BOOST_FUSION_DONT_USE_PREPROCESSED_FILES
 #include <boost/fusion/container/vector/vector.hpp>
 
 #define FUSION_SEQUENCE boost::fusion::vector<std::vector<x>>
diff --git a/test/support/and.cpp b/test/support/and.cpp
index b657ead5..604a68d7 100644
--- a/test/support/and.cpp
+++ b/test/support/and.cpp
@@ -11,24 +11,18 @@
 #   error "does not meet requirements"
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
 #include <boost/fusion/support/detail/and.hpp>
 #include <boost/mpl/bool.hpp>
-#include <boost/type_traits/integral_constant.hpp>
+#include <boost/mpl/assert.hpp>
 
-int main() {
-    using namespace boost;
-    using namespace boost::fusion::detail;
-
-    BOOST_TEST((and_<>::value));
-    BOOST_TEST(!(and_<false_type>::value));
-    BOOST_TEST((and_<true_type>::value));
-    BOOST_TEST(!(and_<true_type, false_type>::value));
-    BOOST_TEST((and_<true_type, true_type>::value));
-    BOOST_TEST(!(and_<true_type, true_type, false_type>::value));
-    BOOST_TEST((and_<true_type, true_type, true_type>::value));
-    BOOST_TEST((and_<true_type, mpl::true_>::value));
-
-    return boost::report_errors();
-}
+using namespace boost;
+using namespace boost::fusion::detail;
 
+BOOST_MPL_ASSERT((and_<>));
+BOOST_MPL_ASSERT_NOT((and_<false_type>));
+BOOST_MPL_ASSERT((and_<true_type>));
+BOOST_MPL_ASSERT_NOT((and_<true_type, false_type>));
+BOOST_MPL_ASSERT((and_<true_type, true_type>));
+BOOST_MPL_ASSERT_NOT((and_<true_type, true_type, false_type>));
+BOOST_MPL_ASSERT((and_<true_type, true_type, true_type>));
+BOOST_MPL_ASSERT((and_<true_type, mpl::true_>));
diff --git a/test/support/is_sequence.cpp b/test/support/is_sequence.cpp
new file mode 100644
index 00000000..428f6354
--- /dev/null
+++ b/test/support/is_sequence.cpp
@@ -0,0 +1,17 @@
+/*=============================================================================
+    Copyright (c) 2018 Louis Dionne
+
+    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)
+==============================================================================*/
+#include <boost/fusion/support/is_sequence.hpp>
+#include <boost/static_assert.hpp>
+
+
+// Make sure fusion::is_sequence and fusion::is_native_fusion_sequence can be
+// used with an incomplete type.
+struct incomplete;
+BOOST_STATIC_ASSERT(!boost::fusion::traits::is_sequence<incomplete>::value);
+BOOST_STATIC_ASSERT(!boost::fusion::traits::is_native_fusion_sequence<incomplete>::value);
+
+int main() { }
diff --git a/test/support/tag_of.cpp b/test/support/tag_of.cpp
new file mode 100644
index 00000000..ee2da10d
--- /dev/null
+++ b/test/support/tag_of.cpp
@@ -0,0 +1,17 @@
+/*=============================================================================
+    Copyright (c) 2018 Louis Dionne
+
+    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)
+==============================================================================*/
+#include <boost/fusion/support/tag_of.hpp>
+#include <boost/static_assert.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+
+// Make sure tag_of can be used with an incomplete type.
+struct incomplete;
+typedef boost::fusion::traits::tag_of<incomplete>::type Tag;
+BOOST_STATIC_ASSERT((boost::is_same<Tag, boost::fusion::non_fusion_tag>::value));
+
+int main() { }