From f217166b2151c1f2f28c31cedd904dcad9df2263 Mon Sep 17 00:00:00 2001
From: Dave Abrahams <dave@boostpro.com>
Date: Thu, 7 Nov 2002 01:11:13 +0000
Subject: [PATCH] BOOST_DEDUCED_TYPENAME

[SVN r16138]
---
 include/boost/config/compiler/visualc.hpp |  1 +
 include/boost/config/suffix.hpp           | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index 9194db5a..6ec0a777 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -46,6 +46,7 @@
 #  define BOOST_NO_USING_TEMPLATE
 #  define BOOST_NO_SWPRINTF
 #  define BOOST_NO_TEMPLATE_TEMPLATES
+#  define BOOST_NO_DEDUCED_TYPENAME
 #  if (_MSC_VER > 1200)
 #     define BOOST_NO_MEMBER_FUNCTION_SPECIALIZATIONS
 #  endif
diff --git a/include/boost/config/suffix.hpp b/include/boost/config/suffix.hpp
index 332527f6..dd00fc18 100644
--- a/include/boost/config/suffix.hpp
+++ b/include/boost/config/suffix.hpp
@@ -313,6 +313,23 @@ namespace std {
 #  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
+
 // ---------------------------------------------------------------------------//
 
 //