From f100326cf0ef9199b6dde9dda8b59a68616afc29 Mon Sep 17 00:00:00 2001
From: Dave Abrahams <dave@boostpro.com>
Date: Tue, 28 Mar 2006 16:12:56 +0000
Subject: [PATCH] Workarounds for GCC bug
 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26904

[SVN r33505]
---
 include/boost/mpl/aux_/preprocessed/gcc/quote.hpp |  2 +-
 include/boost/mpl/quote.hpp                       | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/boost/mpl/aux_/preprocessed/gcc/quote.hpp b/include/boost/mpl/aux_/preprocessed/gcc/quote.hpp
index d7d0420..020f093 100644
--- a/include/boost/mpl/aux_/preprocessed/gcc/quote.hpp
+++ b/include/boost/mpl/aux_/preprocessed/gcc/quote.hpp
@@ -13,8 +13,8 @@ namespace boost { namespace mpl {
 
 template< typename T, bool has_type_ >
 struct quote_impl
-    : T
 {
+    typedef typename T::type type;
 };
 
 template< typename T >
diff --git a/include/boost/mpl/quote.hpp b/include/boost/mpl/quote.hpp
index dab448d..47d62cc 100644
--- a/include/boost/mpl/quote.hpp
+++ b/include/boost/mpl/quote.hpp
@@ -60,9 +60,19 @@ namespace boost { namespace mpl {
 
 template< typename T, bool has_type_ >
 struct quote_impl
+// GCC has a problem with metafunction forwarding when T is a
+// specialization of a template called 'type'.
+# if BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4)) \
+    && BOOST_WORKAROUND(__GNUC_MINOR__, BOOST_TESTED_AT(0)) \
+    && BOOST_WORKAROUND(__GNUC_PATCHLEVEL__ BOOST_TESTED_AT(2))
+{
+    typedef typename T::type type;
+};
+# else 
     : T
 {
 };
+# endif 
 
 template< typename T >
 struct quote_impl<T,false>