From ba8e62af76a2c18c57eec8fefd16e8bfd90bcf46 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Wed, 21 Jan 2015 17:00:41 +0000
Subject: [PATCH] Update return_type_traits.hpp

This header should include the type_traits hedaers it needs and not depend on implicit inclusion which will go away in the current type_traits rewrite.
---
 include/boost/lambda/detail/return_type_traits.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/lambda/detail/return_type_traits.hpp b/include/boost/lambda/detail/return_type_traits.hpp
index bf2394e..d047344 100644
--- a/include/boost/lambda/detail/return_type_traits.hpp
+++ b/include/boost/lambda/detail/return_type_traits.hpp
@@ -13,6 +13,7 @@
 #define BOOST_LAMBDA_RETURN_TYPE_TRAITS_HPP
 
 #include "boost/mpl/has_xxx.hpp"
+#include <boost/type_traits/ice.hpp>
 
 #include <cstddef> // needed for the ptrdiff_t