From 15d9fcdbd1dbe46fd8ddadf6d014dacbb3bf43f1 Mon Sep 17 00:00:00 2001
From: Andrzej Krzemienski <akrzemi1@gmail.com>
Date: Tue, 10 Mar 2015 07:14:36 +0100
Subject: [PATCH] added missing overload for value_or fo non-C++11 compilers

---
 include/boost/optional/optional.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/boost/optional/optional.hpp b/include/boost/optional/optional.hpp
index 126cf02..afcb807 100644
--- a/include/boost/optional/optional.hpp
+++ b/include/boost/optional/optional.hpp
@@ -1106,6 +1106,15 @@ class optional : public optional_detail::optional_base<T>
         else
           return v;
       }
+      
+    template <class U>
+    value_type value_or ( U& v ) const 
+      { 
+        if (this->is_initialized())
+          return get();
+        else
+          return v;
+      }
 #endif