From 1c693f05bfba855c69fe85bcf8a9ebb1823508a7 Mon Sep 17 00:00:00 2001
From: djowel <djowel@gmail.com>
Date: Mon, 18 Feb 2019 12:45:36 +0800
Subject: [PATCH] Fix is_view_impl to return false for non fusion sequences
 (just like is_sequence_impl).

---
 include/boost/fusion/support/is_view.hpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/boost/fusion/support/is_view.hpp b/include/boost/fusion/support/is_view.hpp
index b2b52c42..91ad4f6d 100644
--- a/include/boost/fusion/support/is_view.hpp
+++ b/include/boost/fusion/support/is_view.hpp
@@ -1,7 +1,7 @@
 /*=============================================================================
     Copyright (c) 2001-2011 Joel de Guzman
 
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 ==============================================================================*/
 #if !defined(FUSION_IS_VIEW_03202006_0015)
@@ -40,6 +40,13 @@ namespace boost { namespace fusion
             struct apply : mpl::false_ {};
         };
 
+        template <>
+        struct is_view_impl<non_fusion_tag>
+        {
+            template <typename T>
+            struct apply : mpl::false_ {};
+        };
+
         template <>
         struct is_view_impl<sequence_facade_tag>
         {