From 1d5c367d62d2f3d2fcfb5c8749f254c3e540e052 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Sat, 17 Oct 2015 09:39:56 +0200
Subject: [PATCH] Use BOOST_MOVE_HELPERS_RETURN_SFINAE_BROKEN as some compilers
 prefer return type SFINAE while others don't support it.

---
 include/boost/container/detail/tree.hpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/include/boost/container/detail/tree.hpp b/include/boost/container/detail/tree.hpp
index 956e460..2f35c27 100644
--- a/include/boost/container/detail/tree.hpp
+++ b/include/boost/container/detail/tree.hpp
@@ -408,13 +408,20 @@ struct key_node_compare
    };
 
    template<class T>
-   const typename KeyValueCompare::value_type &
-      key_forward(const T &node, typename enable_if_c<is_node<T>::value>::type* =0) const
+   typename enable_if_c<is_node<T>::value, const typename KeyValueCompare::value_type &>::type
+      key_forward(const T &node) const
    {  return node.get_data();  }
 
+   #if defined(BOOST_MOVE_HELPERS_RETURN_SFINAE_BROKEN)
    template<class T>
    const T &key_forward(const T &key, typename enable_if_c<!is_node<T>::value>::type* =0) const
    {  return key; }
+   #else
+   template<class T>
+   typename enable_if_c<!is_node<T>::value, const T &>::type
+      key_forward(const T &key) const
+   {  return key; }
+   #endif
 
    template<class KeyType, class KeyType2>
    bool operator()(const KeyType &key1, const KeyType2 &key2) const