From 183646254547720c947b804585db8ceaa13e6c97 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Sat, 29 Jun 2013 18:38:17 +0000
Subject: Add operators to make launch a bitmask type.  Searched all of the
 standard, and libc++ to see if this error occurred elsewhere and didn't see
 any other place.  This fixes http://llvm.org/bugs/show_bug.cgi?id=16207

llvm-svn: 185265
---
 libcxx/include/future | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

(limited to 'libcxx/include/future')

diff --git a/libcxx/include/future b/libcxx/include/future
index 3d7bb6c9d04..160114e5901 100644
--- a/libcxx/include/future
+++ b/libcxx/include/future
@@ -403,6 +403,72 @@ _LIBCPP_DECLARE_STRONG_ENUM(launch)
 };
 _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(launch)
 
+#ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
+
+#ifdef _LIBCXX_UNDERLYING_TYPE
+typedef underlying_type<launch>::type __launch_underlying_type;
+#else
+typedef int __launch_underlying_type;
+#endif
+
+inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
+launch
+operator&(launch __x, launch __y)
+{
+    return static_cast<launch>(static_cast<__launch_underlying_type>(__x) &
+                               static_cast<__launch_underlying_type>(__y));
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
+launch
+operator|(launch __x, launch __y)
+{
+    return static_cast<launch>(static_cast<__launch_underlying_type>(__x) |
+                               static_cast<__launch_underlying_type>(__y));
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
+launch
+operator^(launch __x, launch __y)
+{
+    return static_cast<launch>(static_cast<__launch_underlying_type>(__x) ^
+                               static_cast<__launch_underlying_type>(__y));
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_CONSTEXPR
+launch
+operator~(launch __x)
+{
+    return static_cast<launch>(~static_cast<__launch_underlying_type>(__x));
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+launch&
+operator&=(launch& __x, launch __y)
+{
+    __x = __x & __y; return __x;
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+launch&
+operator|=(launch& __x, launch __y)
+{
+    __x = __x | __y; return __x;
+}
+
+inline _LIBCPP_INLINE_VISIBILITY
+launch&
+operator^=(launch& __x, launch __y)
+{
+    __x = __x ^ __y; return __x;
+}
+
+#endif  // !_LIBCPP_HAS_NO_STRONG_ENUMS
+
 //enum class future_status
 _LIBCPP_DECLARE_STRONG_ENUM(future_status)
 {
-- 
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