From a0b28e4c8b9a15b666e2fc5feb703d3be6da1dc8 Mon Sep 17 00:00:00 2001
From: Dave Abrahams <dave@boostpro.com>
Date: Sat, 12 Mar 2005 23:10:43 +0000
Subject: [PATCH] Fix for indirect iterators to abstract classes.

[SVN r27625]
---
 include/boost/iterator/iterator_facade.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/iterator/iterator_facade.hpp b/include/boost/iterator/iterator_facade.hpp
index 45a9055..ddb237d 100644
--- a/include/boost/iterator/iterator_facade.hpp
+++ b/include/boost/iterator/iterator_facade.hpp
@@ -270,8 +270,8 @@ namespace boost
     struct postfix_increment_result
       : mpl::eval_if<
             mpl::and_<
-            // A proxy is only needed for readable iterators
-            is_convertible<Reference,Value>
+                // A proxy is only needed for readable iterators
+                is_convertible<Reference,Value const&>
                 
                 // No multipass iterator can have values that disappear
                 // before positions can be re-visited