[boost] BOOST_DEDUCED_TYPENAME

From: David Abrahams (dave_at_[hidden])
Date: 2002-11-06 19:56:30

I'm making the following patch, which describes a new configuration
macro. Is there some documentation I should update as well?

Index: boost/config/suffix.hpp
===================================================================
RCS file: /cvsroot/boost/boost/boost/config/suffix.hpp,v
retrieving revision 1.18
diff -w -u -r1.18 suffix.hpp
--- boost/config/suffix.hpp	13 Aug 2002 11:50:26 -0000	1.18
+++ boost/config/suffix.hpp	7 Nov 2002 01:09:12 -0000
@@ -313,6 +313,23 @@
 #  define BOOST_NESTED_TEMPLATE
 #endif
 
+// BOOST_DEDUCED_TYPENAME workaround ------------------------------------------//
+//
+// Some compilers don't support the use of `typename' for dependent
+// types in deduced contexts, e.g.
+//
+//     template <class T> void f(T, typename T::type);
+//                                  ^^^^^^^^
+// Replace these declarations with:
+//
+//     template <class T> void f(T, BOOST_DEDUCED_TYPENAME T::type);
+
+#ifndef BOOST_NO_DEDUCED_TYPENAME
+#  define BOOST_DEDUCED_TYPENAME typename
+#else 
+#  define BOOST_DEDUCED_TYPENAME
+#endif
+
 // ---------------------------------------------------------------------------//
 
 //

Thanks,
Dave
-- 
                    David Abrahams
dave_at_[hidden] * http://www.boost-consulting.com