Clean up MSVC build. Fixes #1619. Fixes #3074.

[SVN r62854]

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

@@ -106,7 +106,7 @@ namespace boost { namespace fusion { namespace detail
     struct unrolled_all<0>
     {
         template <typename It, typename F>
-        static bool call(It const& it, F f)
+        static bool call(It const& /*it*/, F /*f*/)
         {
             return true;
         }

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

@@ -7,10 +7,16 @@
 #if !defined(FUSION_COUNT_09162005_0158)
 #define FUSION_COUNT_09162005_0158
 
+#include <boost/config.hpp>
 #include <boost/mpl/or.hpp>
 #include <boost/type_traits/is_convertible.hpp>
 #include <boost/fusion/support/detail/access.hpp>
 
+#if defined (BOOST_MSVC)
+#  pragma warning(push)
+#  pragma warning (disable: 4512) // assignment operator could not be generated.
+#endif
+
 namespace boost { namespace fusion { namespace detail
 { 
     template <bool is_convertible>
@@ -64,5 +70,9 @@ namespace boost { namespace fusion { namespace detail
     };
 }}}
 
+#if defined (BOOST_MSVC)
+#  pragma warning(pop)
+#endif
+
 #endif
 

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

@@ -22,7 +22,7 @@ namespace boost { namespace fusion
 
     template <typename Sequence>
     inline typename result_of::clear<Sequence const>::type
-    clear(Sequence const& seq)
+    clear(Sequence const& /*seq*/)
     {
         return vector0<>();
     }