From 89cec128bd96150b50bb9c3921b0fb69cc10bf84 Mon Sep 17 00:00:00 2001
From: Kohei Takahashi <flast@flast.jp>
Date: Sat, 30 Jul 2016 16:12:07 +0900
Subject: [PATCH] Fix compile error on GCC6 or later.

Bitwise not yields integral promotion and to be signed type.
---
 include/boost/integer/integer_mask.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/integer/integer_mask.hpp b/include/boost/integer/integer_mask.hpp
index 2acf7f7..2cc9a1d 100644
--- a/include/boost/integer/integer_mask.hpp
+++ b/include/boost/integer/integer_mask.hpp
@@ -63,7 +63,7 @@ struct low_bits_mask_t
     typedef typename uint_t<Bits>::least  least;
     typedef typename uint_t<Bits>::fast   fast;
 
-    BOOST_STATIC_CONSTANT( least, sig_bits = (~( ~(least( 0u )) << Bits )) );
+    BOOST_STATIC_CONSTANT( least, sig_bits = (~(least(~(least( 0u ))) << Bits )) );
     BOOST_STATIC_CONSTANT( fast, sig_bits_fast = fast(sig_bits) );
 
     BOOST_STATIC_CONSTANT( std::size_t, bit_count = Bits );