[PATCH] Update dwarf::ApplePropertyAttributes enum to meaningful values.

[Frédéric Riss]

> On Oct 7, 2014, at 1:26 PM, Eric Christopher <echristo at gmail.com> wrote:
> 
> On Tue, Oct 7, 2014 at 12:57 PM, Frederic Riss <friss at apple.com <mailto:friss at apple.com>> wrote:
>> ================
>> Comment at: include/llvm/Support/Dwarf.h:784
>> @@ -783,1 +783,3 @@
>> +/// Contstants for the DW_APPLE_PROPERTY_attributes attribute.
>> +/// Keep this list in sync with clang's DeclSpec.h ObjCPropertyAttributeKind.
>> enum ApplePropertyAttributes {
>> ----------------
>> dblaikie wrote:
>>> Crazy idea: Could we do this the other way around, and remove ObjCPropertyAttributeKind in favor of using this enum directly?
>>> 
>>> Probably not, but figured I'd mention it.
>> I thought of that but I think there would be (rightful) resistance to having Sema code depend on the Dwarf header. In a followup patch for the dwarfdump functionality, I'll try to add coverage for most if not all of these, that will at least prevent us from breaking the current values unknowingly.
>> 
> 
> So it's not so much resistance to having Sema code depend on the dwarf
> header... if we'd write the same code both ways. This code looks a bit
> weird that way in that having the header wouldn't necessarily change
> things.

Not sure I’m getting what you’re implying. I could have included Dwarf.h in DeclSpec.h and define the enum values of the ObjCPropertyAttributeKind in terms of the Dwarf.h values, or even more radically remove ObjCPropertyAttributeKind and rewrite all the code using these enums to use DW_APPLE_PROPERTY_* values instead.

Fred

> Thoughts?
> 
> -eric

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