Constrain launch ~ operator to defined bits. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185452 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/future b/include/future index 160114e..dae1a4b 100644 --- a/include/future +++ b/include/future 
@@ -443,7 +443,7 @@  launch  operator~(launch __x)  { - return static_cast<launch>(~static_cast<__launch_underlying_type>(__x)); + return static_cast<launch>(~static_cast<__launch_underlying_type>(__x) & 3);  }    inline _LIBCPP_INLINE_VISIBILITY