[cfe-commits] [PATCH] Fix name clash (Name clash causing troubles)

Abramo Bagnara abramo.bagnara at gmail.com
Tue Jul 3 02:56:51 PDT 2012

Il 02/07/2012 18:16, Jordan Rose ha scritto:
> On Jul 2, 2012, at 8:22 AM, Dmitri Gribenko wrote:
>> On Sat, Jun 30, 2012 at 11:08 AM, Jordan Rose <jordan_rose at apple.com> wrote:
>>> On Jun 30, 2012, at 2:31 AM, Dmitri Gribenko wrote:
>>>> On Sat, Jun 30, 2012 at 12:55 AM, Enea Zaffanella
>>>> <zaffanella at cs.unipr.it> wrote:
>>>>> In include/clang/AST/RawCommentList.h we have
>>>>> class RawComment {
>>>>> public:
>>>>>   enum CommentKind {
>>>>>     CK_Invalid,      ///< Invalid comment
>>>>>     [...]
>>>>> In include/clang/AST/OperationKinds.h the following macro is defined
>>>>> #define CK_Invalid ((CastKind) -1)
>>>> Hi Enea,
>>>> Thank you for noticing!
>>>> Here is a patch that should fix this.
>>>> Please review.
>>>> Dmitri
>>> It's possible the reason this isn't used is because CastKind would otherwise be only positive numbers and thus suitable for storing in an unsigned bitfield without complaint. Maybe ~0U would be a better choice of constant?
>> Is there any reason why CK_Invalid has an all-ones value?  (We could
>> add it to enum without an initializer)
> I think it's just so it will never intersect with a valid value. If these constants are exposed in libclang, they're expected to remain stable. Then again, CK_Invalid probably may not be exposed in libclang even if the others are.
> I agree with Enea that it's probably not in the enum so that exhaustive switch statements can ignore it -- you should never actually be consuming a cast with CK_Invalid type. And in general I think I agree that we should try to have a different prefix for comment kinds: RC_ or RCK_, since both comment kinds and cast kinds /could/ show up in the same section of code.

I've attached a patch to do that. If you don't have any objection I'll
apply it.

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