From 8a403e78599d8038bec79b12521c5cbe7fe78370 Mon Sep 17 00:00:00 2001
From: Jeremy Siek <jeremy.siek@gmail.com>
Date: Wed, 21 Jan 2004 19:03:32 +0000
Subject: [PATCH] added const to the conversion operator of
 input_iterator_archetype

[SVN r21866]
---
 include/boost/concept_archetype.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/concept_archetype.hpp b/include/boost/concept_archetype.hpp
index 3343165..9981ebf 100644
--- a/include/boost/concept_archetype.hpp
+++ b/include/boost/concept_archetype.hpp
@@ -418,7 +418,7 @@ namespace boost {
     typedef std::input_iterator_tag iterator_category;
     typedef T value_type;
     struct reference {
-      operator value_type() { return static_object<T>::get(); }
+      operator value_type() const { return static_object<T>::get(); }
     };
     typedef const T* pointer;
     typedef std::ptrdiff_t difference_type;