From 16f0a0aaafe5b66518e6d73a7fecf4c59ae6f2c4 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Thu, 6 May 2010 21:44:18 +0000
Subject: [PATCH] Expose the "types" typedef of
 boost::optional_detail::operator_base as public, rather than protected, since
 Spirit pokes at this typedef.

[SVN r61832]
---
 include/boost/optional/optional.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/boost/optional/optional.hpp b/include/boost/optional/optional.hpp
index 01db469..0dd1c62 100644
--- a/include/boost/optional/optional.hpp
+++ b/include/boost/optional/optional.hpp
@@ -173,8 +173,10 @@ class optional_base : public optional_tag
 
     typedef BOOST_DEDUCED_TYPENAME is_reference<T>::type is_reference_predicate ;
 
+  public:
     typedef BOOST_DEDUCED_TYPENAME mpl::if_<is_reference_predicate,types_when_ref,types_when_not_ref>::type types ;
 
+  protected:
     typedef bool (this_type::*unspecified_bool_type)() const;
 
     typedef BOOST_DEDUCED_TYPENAME types::reference_type       reference_type ;