From 59e1516609b2592c083eb78f18169d8e702b63fc Mon Sep 17 00:00:00 2001
From: Edward Diener <eldiener@tropicsoft.com>
Date: Thu, 5 Mar 2015 11:02:19 -0500
Subject: [PATCH] This header should include the type_traits headers 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