[Boost-commit] svn:boost r52511 - trunk/boost/fusion/support

Subject: [Boost-commit] svn:boost r52511 - trunk/boost/fusion/support
From: hartmut.kaiser_at_[hidden]
Date: 2009-04-20 10:57:58

Author: hkaiser
Date: 2009-04-20 10:57:57 EDT (Mon, 20 Apr 2009)
New Revision: 52511
URL: http://svn.boost.org/trac/boost/changeset/52511

Log:
Trying to fix ambiguities of operator<<() for unused_type.
Text files modified: 
   trunk/boost/fusion/support/unused.hpp |    22 ++++++++++++----------                  
   1 files changed, 12 insertions(+), 10 deletions(-)

Modified: trunk/boost/fusion/support/unused.hpp
==============================================================================
--- trunk/boost/fusion/support/unused.hpp	(original)
+++ trunk/boost/fusion/support/unused.hpp	2009-04-20 10:57:57 EDT (Mon, 20 Apr 2009)
@@ -15,7 +15,7 @@
 
 #define BOOST_FUSION_UNUSED_HAS_IO
 
-namespace fusion_adl_barrier
+namespace boost { namespace fusion
 {
     struct unused_type
     {
@@ -56,23 +56,25 @@
     };
 
     unused_type const unused = unused_type();
-}
 
-namespace boost { namespace fusion
-{
-    using ::fusion_adl_barrier::unused_type;
-    using ::fusion_adl_barrier::unused;
+    namespace detail
+    {
+        struct unused_only
+        {
+            unused_only(unused_type const&) {}
+        };
+    }
 
     template <typename Out>
-    inline Out& operator<<(Out& out, unused_type const&)
+    inline Out& operator<<(Out& out, detail::unused_only const&)
     {
         return out;
     }
 
-    template <typename Out>
-    inline Out& operator>>(Out& out, unused_type&)
+    template <typename In>
+    inline In& operator>>(In& in, unused_type&)
     {
-        return out;
+        return in;
     }
 }}