From 119c64be0be476f416ef8a8585e1948a2d65b26d Mon Sep 17 00:00:00 2001
From: Dave Abrahams <dave@boostpro.com>
Date: Wed, 8 Jan 2003 17:21:10 +0000
Subject: [PATCH] Workaround VC7 bug which strips const from nested classes

[SVN r16797]
---
 include/boost/utility/addressof.hpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/include/boost/utility/addressof.hpp b/include/boost/utility/addressof.hpp
index a434b8e..de8dfe5 100644
--- a/include/boost/utility/addressof.hpp
+++ b/include/boost/utility/addressof.hpp
@@ -14,13 +14,25 @@
 // For more information, see http://www.boost.org
 
 #ifndef BOOST_UTILITY_ADDRESSOF_HPP
-#define BOOST_UTILITY_ADDRESSOF_HPP
+# define BOOST_UTILITY_ADDRESSOF_HPP
+
+# include <boost/config.hpp>
+# include <boost/detail/workaround.hpp>
+# if BOOST_WORKAROUND(BOOST_MSVC, == 1300)
+#  include <boost/type_traits/add_pointer.hpp>
+# endif
 
 namespace boost {
 
 // Do not make addressof() inline. Breaks MSVC 7. (Peter Dimov)
 
-template <typename T> T* addressof(T& v)
+// VC7 strips const from nested classes unless we add indirection here
+# if BOOST_WORKAROUND(BOOST_MSVC, == 1300)
+template <typename T> typename add_pointer<T>::type
+# else
+template <typename T> T*
+# endif
+addressof(T& v)
 {
   return reinterpret_cast<T*>(
        &const_cast<char&>(reinterpret_cast<const volatile char &>(v)));