1 files changed, 1 insertions, 24 deletions
diff --git a/boost/spirit/home/support/unused.hpp b/boost/spirit/home/support/unused.hpp
index 4197d6af57..4ffad6b09b 100644
--- a/boost/spirit/home/support/unused.hpp
+++ b/boost/spirit/home/support/unused.hpp
@@ -15,11 +15,6 @@
 #include <boost/config.hpp>
 #include <boost/mpl/bool.hpp>
 
-#if defined(BOOST_MSVC)
-# pragma warning(push)
-# pragma warning(disable: 4522) // multiple assignment operators specified warning
-#endif
-
 ///////////////////////////////////////////////////////////////////////////////
 namespace boost { namespace spirit
 {
@@ -31,9 +26,7 @@ namespace boost { namespace spirit
     ///////////////////////////////////////////////////////////////////////////
     struct unused_type
     {
-        unused_type()
-        {
-        }
+        BOOST_DEFAULTED_FUNCTION(unused_type(), {})
 
         template <typename T>
         unused_type(T const&)
@@ -53,18 +46,6 @@ namespace boost { namespace spirit
         {
             return *this;
         }
-
-        unused_type const&
-        operator=(unused_type const&) const
-        {
-            return *this;
-        }
-
-        unused_type&
-        operator=(unused_type const&)
-        {
-            return *this;
-        }
     };
 
     unused_type const unused = unused_type();
@@ -98,8 +79,4 @@ namespace boost { namespace spirit
     }
 }}
 
-#if defined(BOOST_MSVC)
-# pragma warning(pop)
-#endif
-
 #endif