Unordered: Merge allocator fix + improved tests. Fixes #7100.

[SVN r79547]

include/boost/unordered/detail/equivalent.hpp

@@ -37,7 +37,7 @@ namespace boost { namespace unordered { namespace detail {
 
 #if BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT
         template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
-        grouped_node(BOOST_UNORDERED_EMPLACE_ARGS) :
+        explicit grouped_node(BOOST_UNORDERED_EMPLACE_ARGS) :
             node_base(),
             group_prev_(),
             hash_(0)
@@ -49,6 +49,10 @@ namespace boost { namespace unordered { namespace detail {
         ~grouped_node() {
             boost::unordered::detail::destroy(this->value_ptr());
         }
+
+        grouped_node(grouped_node const&) {
+            assert(false);
+        }
 #else
         grouped_node() :
             node_base(),
@@ -61,6 +65,9 @@ namespace boost { namespace unordered { namespace detail {
         {
             group_prev_ = self;
         }
+
+    private:
+        grouped_node& operator=(grouped_node const&);
     };
 
     template <typename T>
@@ -77,7 +84,7 @@ namespace boost { namespace unordered { namespace detail {
 
 #if BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT
         template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
-        grouped_ptr_node(BOOST_UNORDERED_EMPLACE_ARGS) :
+        explicit grouped_ptr_node(BOOST_UNORDERED_EMPLACE_ARGS) :
             bucket_base(),
             group_prev_(0),
             hash_(0)
@@ -89,6 +96,10 @@ namespace boost { namespace unordered { namespace detail {
         ~grouped_ptr_node() {
             boost::unordered::detail::destroy(this->value_ptr());
         }
+
+        grouped_ptr_node(grouped_ptr_node const&) {
+            assert(false);
+        }
 #else
         grouped_ptr_node() :
             bucket_base(),
@@ -101,6 +112,9 @@ namespace boost { namespace unordered { namespace detail {
         {
             group_prev_ = self;
         }
+
+    private:
+        grouped_ptr_node& operator=(grouped_ptr_node const&);
     };
 
     // If the allocator uses raw pointers use grouped_ptr_node

include/boost/unordered/detail/unique.hpp

@@ -38,7 +38,7 @@ namespace boost { namespace unordered { namespace detail {
 
 #if BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT
         template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
-        unique_node(BOOST_UNORDERED_EMPLACE_ARGS) :
+        explicit unique_node(BOOST_UNORDERED_EMPLACE_ARGS) :
             node_base(),
             hash_(0)
         {
@@ -49,6 +49,10 @@ namespace boost { namespace unordered { namespace detail {
         ~unique_node() {
             boost::unordered::detail::destroy(this->value_ptr());
         }
+
+        unique_node(unique_node const&) {
+            BOOST_ASSERT(false);
+        }
 #else
         unique_node() :
             node_base(),
@@ -59,6 +63,9 @@ namespace boost { namespace unordered { namespace detail {
         void init(link_pointer)
         {
         }
+
+    private:
+        unique_node& operator=(unique_node const&);
     };
 
     template <typename T>
@@ -74,7 +81,7 @@ namespace boost { namespace unordered { namespace detail {
 
 #if BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT
         template <BOOST_UNORDERED_EMPLACE_TEMPLATE>
-        ptr_node(BOOST_UNORDERED_EMPLACE_ARGS) :
+        explicit ptr_node(BOOST_UNORDERED_EMPLACE_ARGS) :
             bucket_base(),
             hash_(0)
         {
@@ -85,6 +92,10 @@ namespace boost { namespace unordered { namespace detail {
         ~ptr_node() {
             boost::unordered::detail::destroy(this->value_ptr());
         }
+
+        ptr_node(ptr_node const&) {
+            BOOST_ASSERT(false);
+        }
 #else
         ptr_node() :
             bucket_base(),
@@ -95,6 +106,9 @@ namespace boost { namespace unordered { namespace detail {
         void init(link_pointer)
         {
         }
+
+    private:
+        ptr_node& operator=(ptr_node const&);
     };
 
     // If the allocator uses raw pointers use ptr_node

test/objects/test.hpp

@@ -22,7 +22,8 @@ namespace test
     class hash;
     class less;
     class equal_to;
-    template <class T> class allocator;
+    template <class T> class allocator1;
+    template <class T> class allocator2;
     object generate(object const*);
     implicitly_convertible generate(implicitly_convertible const*);
     
@@ -183,13 +184,97 @@ namespace test
         }
     };
 
+    // allocator1 and allocator2 are pretty similar.
+    // allocator1 only has the old fashioned 'construct' method and has
+    // a few less typedefs
+
     template <class T>
-    class allocator
+    class allocator1
+    {
+    public:
+        int tag_;
+
+        typedef T value_type;
+
+        template <class U> struct rebind { typedef allocator1<U> other; };
+
+        explicit allocator1(int t = 0) : tag_(t)
+        {
+            detail::tracker.allocator_ref();
+        }
+
+        template <class Y> allocator1(allocator1<Y> const& x)
+            : tag_(x.tag_)
+        {
+            detail::tracker.allocator_ref();
+        }
+
+        allocator1(allocator1 const& x)
+            : tag_(x.tag_)
+        {
+            detail::tracker.allocator_ref();
+        }
+
+        ~allocator1()
+        {
+            detail::tracker.allocator_unref();
+        }
+
+        T* allocate(std::size_t n) {
+            T* ptr(static_cast<T*>(::operator new(n * sizeof(T))));
+            detail::tracker.track_allocate((void*) ptr, n, sizeof(T), tag_);
+            return ptr;
+        }
+
+        T* allocate(std::size_t n, void const* u)
+        {
+            T* ptr(static_cast<T*>(::operator new(n * sizeof(T))));
+            detail::tracker.track_allocate((void*) ptr, n, sizeof(T), tag_);
+            return ptr;
+        }
+
+        void deallocate(T* p, std::size_t n)
+        {
+            detail::tracker.track_deallocate((void*) p, n, sizeof(T), tag_);
+            ::operator delete((void*) p);
+        }
+
+        void construct(T* p, T const& t) {
+            // Don't count constructions here as it isn't always called.
+            //detail::tracker.track_construct((void*) p, sizeof(T), tag_);
+            new(p) T(t);
+        }
+
+        void destroy(T* p) {
+            //detail::tracker.track_destroy((void*) p, sizeof(T), tag_);
+            p->~T();
+        }
+
+        bool operator==(allocator1 const& x) const
+        {
+            return tag_ == x.tag_;
+        }
+
+        bool operator!=(allocator1 const& x) const
+        {
+            return tag_ != x.tag_;
+        }
+
+        enum {
+            is_select_on_copy = false,
+            is_propagate_on_swap = false,
+            is_propagate_on_assign = false,
+            is_propagate_on_move = false
+        };
+    };
+
+    template <class T>
+    class allocator2
     {
 # ifdef BOOST_NO_MEMBER_TEMPLATE_FRIENDS
     public:
 # else
-        template <class> friend class allocator;
+        template <class> friend class allocator2;
 # endif
         int tag_;
     public:
@@ -201,26 +286,26 @@ namespace test
         typedef T const& const_reference;
         typedef T value_type;
 
-        template <class U> struct rebind { typedef allocator<U> other; };
+        template <class U> struct rebind { typedef allocator2<U> other; };
 
-        explicit allocator(int t = 0) : tag_(t)
+        explicit allocator2(int t = 0) : tag_(t)
         {
             detail::tracker.allocator_ref();
         }
         
-        template <class Y> allocator(allocator<Y> const& x)
+        template <class Y> allocator2(allocator2<Y> const& x)
             : tag_(x.tag_)
         {
             detail::tracker.allocator_ref();
         }
 
-        allocator(allocator const& x)
+        allocator2(allocator2 const& x)
             : tag_(x.tag_)
         {
             detail::tracker.allocator_ref();
         }
 
-        ~allocator()
+        ~allocator2()
         {
             detail::tracker.allocator_unref();
         }
@@ -275,12 +360,12 @@ namespace test
             return (std::numeric_limits<size_type>::max)();
         }
 
-        bool operator==(allocator const& x) const
+        bool operator==(allocator2 const& x) const
         {
             return tag_ == x.tag_;
         }
 
-        bool operator!=(allocator const& x) const
+        bool operator!=(allocator2 const& x) const
         {
             return tag_ != x.tag_;
         }
@@ -294,7 +379,14 @@ namespace test
     };
 
     template <class T>
-    bool equivalent_impl(allocator<T> const& x, allocator<T> const& y,
+    bool equivalent_impl(allocator1<T> const& x, allocator1<T> const& y,
+        test::derived_type)
+    {
+        return x == y;
+    }
+
+    template <class T>
+    bool equivalent_impl(allocator2<T> const& x, allocator2<T> const& y,
         test::derived_type)
     {
         return x == y;

test/unordered/assign_tests.cpp

@@ -114,18 +114,22 @@ void assign_tests2(T*,
     }
 }
 
-boost::unordered_set<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
-boost::unordered_multiset<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
 boost::unordered_map<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
+    std::allocator<test::object> >* test_map_std_alloc;
+
+boost::unordered_set<test::object,
+    test::hash, test::equal_to,
+    test::allocator1<test::object> >* test_set;
+boost::unordered_multiset<test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_multiset;
+boost::unordered_map<test::object, test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    test::allocator1<test::object> >* test_multimap;
 
 boost::unordered_set<test::object,
         test::hash, test::equal_to,
@@ -178,6 +182,7 @@ UNORDERED_AUTO_TEST(check_traits)
 }
 
 UNORDERED_TEST(assign_tests1, (
+        (test_map_std_alloc)
         (test_set)(test_multiset)(test_map)(test_multimap)
         (test_set_prop_assign)(test_multiset_prop_assign)(test_map_prop_assign)(test_multimap_prop_assign)
         (test_set_no_prop_assign)(test_multiset_no_prop_assign)(test_map_no_prop_assign)(test_multimap_no_prop_assign)

test/unordered/bucket_tests.cpp

@@ -68,20 +68,24 @@ void tests(X* = 0, test::random_generator generator = test::default_generator)
     }
 }
 
-boost::unordered_set<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
-boost::unordered_multiset<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
-boost::unordered_map<test::object, test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    std::allocator<test::object> >* test_multimap_std_alloc;
 
-UNORDERED_TEST(tests, ((test_set)(test_multiset)(test_map)(test_multimap)))
+boost::unordered_set<test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_set;
+boost::unordered_multiset<test::object,
+    test::hash, test::equal_to,
+    test::allocator1<test::object> >* test_multiset;
+boost::unordered_map<test::object, test::object,
+    test::hash, test::equal_to,
+    test::allocator1<test::object> >* test_map;
+boost::unordered_multimap<test::object, test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_multimap;
+
+UNORDERED_TEST(tests, ((test_multimap_std_alloc)(test_set)(test_multiset)(test_map)(test_multimap)))
 
 }
 

test/unordered/constructor_tests.cpp

@@ -402,24 +402,28 @@ void map_constructor_test(T* = 0,
     test::check_equivalent_keys(x);
 }
 
-boost::unordered_set<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
-boost::unordered_multiset<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
 boost::unordered_map<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
+    std::allocator<test::object> >* test_map_std_alloc;
+
+boost::unordered_set<test::object,
+    test::hash, test::equal_to,
+    test::allocator1<test::object> >* test_set;
+boost::unordered_multiset<test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_multiset;
+boost::unordered_map<test::object, test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    test::allocator1<test::object> >* test_multimap;
 
 using test::default_generator;
 using test::generate_collisions;
 
 UNORDERED_TEST(constructor_tests1,
-    ((test_set)(test_multiset)(test_map)(test_multimap))
+    ((test_map_std_alloc)(test_set)(test_multiset)(test_map)(test_multimap))
     ((default_generator)(generate_collisions))
 )
 
@@ -429,7 +433,7 @@ UNORDERED_TEST(constructor_tests2,
 )
 
 UNORDERED_TEST(map_constructor_test,
-    ((test_map)(test_multimap))
+    ((test_map_std_alloc)(test_map)(test_multimap))
 )
 
 #if !defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST)

test/unordered/copy_tests.cpp

@@ -155,16 +155,16 @@ void copy_construct_tests2(T* ptr,
 
 boost::unordered_set<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
+    test::allocator1<test::object> >* test_set;
 boost::unordered_multiset<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
+    test::allocator2<test::object> >* test_multiset;
 boost::unordered_map<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
+    test::allocator1<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    test::allocator2<test::object> >* test_multimap;
 
 boost::unordered_set<test::object,
         test::hash, test::equal_to,

test/unordered/erase_equiv_tests.cpp

@@ -53,10 +53,10 @@ struct collision2_hash
 
 typedef boost::unordered_multimap<int, int,
     collision_hash, std::equal_to<int>,
-    test::allocator<std::pair<int const, int> > > collide_map;
+    test::allocator1<std::pair<int const, int> > > collide_map;
 typedef boost::unordered_multimap<int, int,
     collision2_hash, std::equal_to<int>,
-    test::allocator<std::pair<int const, int> > > collide_map2;
+    test::allocator2<std::pair<int const, int> > > collide_map2;
 typedef collide_map::value_type collide_value;
 typedef test::list<collide_value> collide_list;
 

test/unordered/erase_tests.cpp

@@ -196,16 +196,16 @@ void erase_tests1(Container*,
 
 boost::unordered_set<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
+    test::allocator1<test::object> >* test_set;
 boost::unordered_multiset<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
+    test::allocator2<test::object> >* test_multiset;
 boost::unordered_map<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
+    test::allocator1<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    test::allocator2<test::object> >* test_multimap;
 
 using test::default_generator;
 using test::generate_collisions;

test/unordered/find_tests.cpp

@@ -142,16 +142,16 @@ void find_compatible_keys_test(X*,
 
 boost::unordered_set<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
+    test::allocator2<test::object> >* test_set;
 boost::unordered_multiset<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
+    test::allocator1<test::object> >* test_multiset;
 boost::unordered_map<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
+    test::allocator2<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    test::allocator1<test::object> >* test_multimap;
 
 using test::default_generator;
 using test::generate_collisions;

test/unordered/insert_tests.cpp

@@ -410,43 +410,50 @@ void map_insert_range_test2(X*,
 
 boost::unordered_set<test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_set;
+    std::allocator<test::object> >* test_set_std_alloc;
-boost::unordered_multiset<test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multiset;
-boost::unordered_map<test::object, test::object,
-    test::hash, test::equal_to,
-    test::allocator<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
     test::hash, test::equal_to,
-    test::allocator<test::object> >* test_multimap;
+    std::allocator<test::object> >* test_multimap_std_alloc;
+
+boost::unordered_set<test::object,
+    test::hash, test::equal_to,
+    test::allocator1<test::object> >* test_set;
+boost::unordered_multiset<test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_multiset;
+boost::unordered_map<test::object, test::object,
+    test::hash, test::equal_to,
+    test::allocator2<test::object> >* test_map;
+boost::unordered_multimap<test::object, test::object,
+    test::hash, test::equal_to,
+    test::allocator1<test::object> >* test_multimap;
 
 using test::default_generator;
 using test::generate_collisions;
 
 UNORDERED_TEST(unique_insert_tests1,
-    ((test_set)(test_map))
+    ((test_set_std_alloc)(test_set)(test_map))
     ((default_generator)(generate_collisions))
 )
 
 UNORDERED_TEST(equivalent_insert_tests1,
-    ((test_multiset)(test_multimap))
+    ((test_multimap_std_alloc)(test_multiset)(test_multimap))
     ((default_generator)(generate_collisions))
 )
 
 UNORDERED_TEST(insert_tests2,
-    ((test_set)(test_multiset)(test_map)(test_multimap))
+    ((test_multimap_std_alloc)(test_set)(test_multiset)(test_map)(test_multimap))
     ((default_generator)(generate_collisions))
 )
 
 #if !defined(BOOST_NO_RVALUE_REFERENCES) && !defined(BOOST_NO_VARIADIC_TEMPLATES)
 UNORDERED_TEST(unique_emplace_tests1,
-    ((test_set)(test_map))
+    ((test_set_std_alloc)(test_set)(test_map))
     ((default_generator)(generate_collisions))
 )
 
 UNORDERED_TEST(equivalent_emplace_tests1,
-    ((test_multiset)(test_multimap))
+    ((test_multimap_std_alloc)(test_multiset)(test_multimap))
     ((default_generator)(generate_collisions))
 )
 #endif
@@ -457,12 +464,12 @@ UNORDERED_TEST(map_tests,
 )
 
 UNORDERED_TEST(map_insert_range_test1,
-    ((test_map)(test_multimap))
+    ((test_multimap_std_alloc)(test_map)(test_multimap))
     ((default_generator)(generate_collisions))
 )
 
 UNORDERED_TEST(map_insert_range_test2,
-    ((test_map)(test_multimap))
+    ((test_multimap_std_alloc)(test_map)(test_multimap))
     ((default_generator)(generate_collisions))
 )
 

test/unordered/move_tests.cpp

@@ -316,18 +316,22 @@ namespace move_tests
         }
     }
 
-    boost::unordered_set<test::object,
-        test::hash, test::equal_to,
-        test::allocator<test::object> >* test_set;
-    boost::unordered_multiset<test::object,
-        test::hash, test::equal_to,
-        test::allocator<test::object> >* test_multiset;
     boost::unordered_map<test::object, test::object,
         test::hash, test::equal_to,
-        test::allocator<test::object> >* test_map;
+        std::allocator<test::object> >* test_map_std_alloc;
+
+    boost::unordered_set<test::object,
+        test::hash, test::equal_to,
+        test::allocator2<test::object> >* test_set;
+    boost::unordered_multiset<test::object,
+        test::hash, test::equal_to,
+        test::allocator1<test::object> >* test_multiset;
+    boost::unordered_map<test::object, test::object,
+        test::hash, test::equal_to,
+        test::allocator1<test::object> >* test_map;
     boost::unordered_multimap<test::object, test::object,
         test::hash, test::equal_to,
-        test::allocator<test::object> >* test_multimap;
+        test::allocator2<test::object> >* test_multimap;
 
 boost::unordered_set<test::object,
         test::hash, test::equal_to,
@@ -367,12 +371,14 @@ boost::unordered_multimap<test::object, test::object,
     using test::generate_collisions;
 
     UNORDERED_TEST(move_construct_tests1, (
+            (test_map_std_alloc)
             (test_set)(test_multiset)(test_map)(test_multimap)
             (test_set_prop_move)(test_multiset_prop_move)(test_map_prop_move)(test_multimap_prop_move)
             (test_set_no_prop_move)(test_multiset_no_prop_move)(test_map_no_prop_move)(test_multimap_no_prop_move)
         )
     )
     UNORDERED_TEST(move_assign_tests1, (
+            (test_map_std_alloc)
             (test_set)(test_multiset)(test_map)(test_multimap)
             (test_set_prop_move)(test_multiset_prop_move)(test_map_prop_move)(test_multimap_prop_move)
             (test_set_no_prop_move)(test_multiset_no_prop_move)(test_map_no_prop_move)(test_multimap_no_prop_move)

test/unordered/swap_tests.cpp

@@ -148,18 +148,22 @@ void swap_tests2(X* ptr = 0,
     }
 }
 
-boost::unordered_set<test::object,
-        test::hash, test::equal_to,
-        test::allocator<test::object> >* test_set;
-boost::unordered_multiset<test::object,
-        test::hash, test::equal_to,
-        test::allocator<test::object> >* test_multiset;
 boost::unordered_map<test::object, test::object,
         test::hash, test::equal_to,
-        test::allocator<test::object> >* test_map;
+        std::allocator<test::object> >* test_map_std_alloc;
+
+boost::unordered_set<test::object,
+        test::hash, test::equal_to,
+        test::allocator1<test::object> >* test_set;
+boost::unordered_multiset<test::object,
+        test::hash, test::equal_to,
+        test::allocator2<test::object> >* test_multiset;
+boost::unordered_map<test::object, test::object,
+        test::hash, test::equal_to,
+        test::allocator1<test::object> >* test_map;
 boost::unordered_multimap<test::object, test::object,
         test::hash, test::equal_to,
-        test::allocator<test::object> >* test_multimap;
+        test::allocator2<test::object> >* test_multimap;
 
 boost::unordered_set<test::object,
         test::hash, test::equal_to,
@@ -209,6 +213,7 @@ UNORDERED_AUTO_TEST(check_traits)
 }
 
 UNORDERED_TEST(swap_tests1, (
+    (test_map_std_alloc)
     (test_set)(test_multiset)(test_map)(test_multimap)
     (test_set_prop_swap)(test_multiset_prop_swap)(test_map_prop_swap)(test_multimap_prop_swap)
     (test_set_no_prop_swap)(test_multiset_no_prop_swap)(test_map_no_prop_swap)(test_multimap_no_prop_swap)

test/unordered/unnecessary_copy_tests.cpp

@@ -245,7 +245,8 @@ namespace unnecessary_copy_tests
         // the existing element.
         reset();
         x.emplace();
-#if !defined(BOOST_NO_VARIADIC_TEMPLATES)
+#if !defined(BOOST_NO_VARIADIC_TEMPLATES) || \
+    !defined(BOOST_NO_RVALUE_REFERENCES)
         // source_cost doesn't make much sense here, but it seems to fit.
         COPY_COUNT(1); MOVE_COUNT(source_cost);
 #else