[Boost-commit] svn:boost r45502 - branches/proto/v4/boost/proto

From: eric_at_[hidden]
Date: 2008-05-18 19:17:14

Author: eric_niebler
Date: 2008-05-18 19:17:13 EDT (Sun, 18 May 2008)
New Revision: 45502
URL: http://svn.boost.org/trac/boost/changeset/45502

Log:
add result_of::flatten metafunction
Text files modified: 
   branches/proto/v4/boost/proto/fusion.hpp |    14 ++++++++++++++                          
   1 files changed, 14 insertions(+), 0 deletions(-)

Modified: branches/proto/v4/boost/proto/fusion.hpp
==============================================================================
--- branches/proto/v4/boost/proto/fusion.hpp	(original)
+++ branches/proto/v4/boost/proto/fusion.hpp	2008-05-18 19:17:13 EDT (Sun, 18 May 2008)
@@ -116,7 +116,21 @@
                 return typename result<as_element(Expr const &)>::type(expr);
             }
         };
+    }
+    
+    namespace result_of
+    {
+        template<typename Expr>
+        struct flatten
+        {
+            typedef detail::flat_view<Expr const> type;
+        };
 
+        template<typename Expr>
+        struct flatten<Expr &>
+        {
+            typedef detail::flat_view<Expr const> type;
+        };
     }
 
     namespace functional