From 42a01fc3f4a850ddf1a45ea7b93805db26ac3078 Mon Sep 17 00:00:00 2001
From: Kohei Takahashi <flast@flast.jp>
Date: Fri, 13 Oct 2017 20:04:11 +0900
Subject: [PATCH] Fixed compile error with std::array

libc++ enables std::array in c++98 mode, but <type_traits> doesn't.
---
 include/boost/fusion/adapted/std_array/detail/array_size.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/fusion/adapted/std_array/detail/array_size.hpp b/include/boost/fusion/adapted/std_array/detail/array_size.hpp
index 2f839404..013d3d7b 100644
--- a/include/boost/fusion/adapted/std_array/detail/array_size.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/array_size.hpp
@@ -8,7 +8,7 @@
 #define BOOST_FUSION_STD_ARRAY_ARRAY_SIZE_01062013_1700
 
 #include <cstddef>
-#include <type_traits>
+#include <boost/type_traits/integral_constant.hpp>
 
 namespace boost { namespace fusion
 {
@@ -18,7 +18,7 @@ namespace boost { namespace fusion
         struct std_array_size;
 
         template<template<typename, std::size_t> class Array, typename T, std::size_t N>
-        struct std_array_size<Array<T, N>> : std::integral_constant<std::size_t, N> {};
+        struct std_array_size<Array<T, N> > : boost::integral_constant<std::size_t, N> {};
     }
 }}