From eeac9fcfb723bc5ea98b3857536b7f938660d762 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Sat, 7 Jul 2012 17:04:52 +0000
Subject: Apply constexpr to <bitset>.

llvm-svn: 159899
---
 libcxx/include/__bit_reference | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'libcxx/include/__bit_reference')

diff --git a/libcxx/include/__bit_reference b/libcxx/include/__bit_reference
index 21ce11f558d..b91532db2ec 100644
--- a/libcxx/include/__bit_reference
+++ b/libcxx/include/__bit_reference
@@ -131,13 +131,14 @@ public:
     __bit_const_reference(const __bit_reference<_Cp>& __x) _NOEXCEPT
         : __seg_(__x.__seg_), __mask_(__x.__mask_) {}
 
-    _LIBCPP_INLINE_VISIBILITY operator bool() const _NOEXCEPT
+    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR operator bool() const _NOEXCEPT
         {return static_cast<bool>(*__seg_ & __mask_);}
 
     _LIBCPP_INLINE_VISIBILITY __bit_iterator<_Cp, true> operator&() const _NOEXCEPT
         {return __bit_iterator<_Cp, true>(__seg_, static_cast<unsigned>(__ctz(__mask_)));}
 private:
     _LIBCPP_INLINE_VISIBILITY
+    _LIBCPP_CONSTEXPR
     __bit_const_reference(__storage_pointer __s, __storage_type __m) _NOEXCEPT
         : __seg_(__s), __mask_(__m) {}
 
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