[PATCH] Prevent macro argument expansion when the LHS of concatenation is empty

[Rafael Espíndola]

Harald, can you convert macro_paste_empty.c to FileCheck while you are at it?

Argyrios, you are probably the best one to review the patch itself.

On 23 May 2013 17:01, Harald van Dijk <harald at gigawatt.nl> wrote:
> ping
>
> Retested today, still applies cleanly, still passes testing.
>
>
> On 05/05/13 18:51, Harald van Dijk wrote:
>>
>> ping
>>
>> Note that all tests now pass, the failures I previously got were due to
>> local issues.
>>
>> On 10/04/13 22:36, Harald van Dijk wrote:
>>>
>>> Hi all,
>>>
>>> As mentioned in http://llvm.org/bugs/show_bug.cgi?id=12767, and what I
>>> again reported as http://llvm.org/bugs/show_bug.cgi?id=15661, when
>>> concatenating x ## y, argument expansion for y should be suppressed even
>>> when x is empty. Does this approach look okay? All preprocessor tests
>>> pass, a few other tests were already failing for me and continue to fail
>>> the same way, there are no new failures.
>>>
>>> This is my first contribution to clang, I am not yet familiar with the
>>> process. I should not need to do more than send this patch to the list,
>>> correct?
>>>
>>> Cheers,
>>> Harald
>
>
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