Index: container_adaptor/detail/functor_bag.hpp
===================================================================
--- container_adaptor/detail/functor_bag.hpp	(revision 65609)
+++ container_adaptor/detail/functor_bag.hpp	(working copy)
@@ -84,6 +84,9 @@
     {
         return *(static_cast<Functor const *>(this));
     }
+private:
+	// suppress C4512 (assignment operator could not be generated) on msvc with /W4
+    data_with_functor_bag<Data, FunctorList>& operator=(const data_with_functor_bag<Data, FunctorList>&);
 };
 
 } // namespace detail
Index: relation/structured_pair.hpp
===================================================================
--- relation/structured_pair.hpp	(revision 65609)
+++ relation/structured_pair.hpp	(working copy)
@@ -80,6 +80,10 @@
     const BOOST_DEDUCED_TYPENAME base_:: left_value_type &  get_left()const { return first;  }
           BOOST_DEDUCED_TYPENAME base_::right_value_type & get_right()      { return second; }
     const BOOST_DEDUCED_TYPENAME base_::right_value_type & get_right()const { return second; }
+private:
+    // suppress C4512 (assignment operator could not be generated) on msvc with /W4
+    normal_storage<FirstType, SecondType>& 
+        operator=(const normal_storage<FirstType, SecondType>&);
 };
 
 /// \brief Storage definition of the right view of a mutant relation.
@@ -115,6 +119,10 @@
     const BOOST_DEDUCED_TYPENAME base_:: left_value_type &  get_left()const { return second; }
           BOOST_DEDUCED_TYPENAME base_::right_value_type & get_right()      { return first;  }
     const BOOST_DEDUCED_TYPENAME base_::right_value_type & get_right()const { return first;  }
+private:
+	// suppress C4512 (assignment operator could not be generated) on msvc with /W4
+	mirror_storage<FirstType, SecondType>& 
+		operator=(const mirror_storage<FirstType, SecondType>&);
 };
 
 /** \struct boost::bimaps::relation::storage_finder
Index: relation/mutant_relation.hpp
===================================================================
--- relation/mutant_relation.hpp	(revision 65609)
+++ relation/mutant_relation.hpp	(working copy)
@@ -88,6 +88,10 @@
     const BOOST_DEDUCED_TYPENAME base_:: left_value_type &  get_left()const { return left;  }
           BOOST_DEDUCED_TYPENAME base_::right_value_type & get_right()      { return right; }
     const BOOST_DEDUCED_TYPENAME base_::right_value_type & get_right()const { return right; }
+private:
+    // suppress C4512 (assignment operator could not be generated) on msvc with /W4
+    relation_storage<LeftType, RightType, force_mutable> 
+        operator=(const relation_storage<LeftType, RightType, force_mutable>&);
 };