From ab01dfff7ee89ac16d3f193e284e2313e036eace Mon Sep 17 00:00:00 2001
From: Sebastian Redl <sebastian.redl@getdesigned.at>
Date: Sun, 25 Jul 2010 22:21:45 +0000
Subject: [PATCH] Fully qualify ios flags. Fixes compilation of PropertyTree,
 bug 4459.

[SVN r64342]
---
 include/boost/optional/optional_io.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/optional/optional_io.hpp b/include/boost/optional/optional_io.hpp
index a64d0f5..c5d3c31 100644
--- a/include/boost/optional/optional_io.hpp
+++ b/include/boost/optional/optional_io.hpp
@@ -74,12 +74,12 @@ operator>>(std::basic_istream<CharType, CharTrait>& in, optional<T>& v)
     else
     {
       if ( d != '-')
-        in.setstate( ios::failbit );
+        in.setstate( std::ios::failbit );
         
       d = in.get();
       
       if ( d != '-')
-        in.setstate( ios::failbit );
+        in.setstate( std::ios::failbit );
         
       v = optional<T>() ;
     }