From b8cf34c691623e4ec329053cbbf68522a855882d Mon Sep 17 00:00:00 2001
From: DongHun Kwak <dh0128.kwak@samsung.com>
Date: Thu, 5 Dec 2019 15:12:59 +0900
Subject: Imported Upstream version 1.67.0

---
 boost/dynamic_bitset/dynamic_bitset.hpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'boost/dynamic_bitset')

diff --git a/boost/dynamic_bitset/dynamic_bitset.hpp b/boost/dynamic_bitset/dynamic_bitset.hpp
index 135070d167..83fcb61a1e 100644
--- a/boost/dynamic_bitset/dynamic_bitset.hpp
+++ b/boost/dynamic_bitset/dynamic_bitset.hpp
@@ -1070,7 +1070,7 @@ bool dynamic_bitset<Block, Allocator>::all() const
                 return false;
             }
         }
-        block_type const mask = ~(~static_cast<Block>(0) << extra_bits);
+        const block_type mask = (block_type(1) << extra_bits) - 1;
         if (m_highest_block() != mask) {
             return false;
         }
@@ -1940,8 +1940,7 @@ inline void dynamic_bitset<Block, Allocator>::m_zero_unused_bits()
     const block_width_type extra_bits = count_extra_bits();
 
     if (extra_bits != 0)
-        m_highest_block() &= ~(~static_cast<Block>(0) << extra_bits);
-
+        m_highest_block() &= (Block(1) << extra_bits) - 1;
 }
 
 // check class invariants
@@ -1950,7 +1949,7 @@ bool dynamic_bitset<Block, Allocator>::m_check_invariants() const
 {
     const block_width_type extra_bits = count_extra_bits();
     if (extra_bits > 0) {
-        block_type const mask = (~static_cast<Block>(0) << extra_bits);
+        const block_type mask = block_type(~0) << extra_bits;
         if ((m_highest_block() & mask) != 0)
             return false;
     }
-- 
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