[cfe-users] (bug?) ParsedAttr::getNumArgs() always return zero

[Aaron Ballman via cfe-users]

On Thu, Dec 2, 2021 at 12:48 PM David Blaikie <dblaikie at gmail.com> wrote:
>
> I'm /guessing/ this API doesn't respond with attributes clang doesn't recognize (CC'd Aaron Ballman who would likely know the details better than I do). Does the API correctly respond with a non-zero number of attributes for any clang-supported attribute (listed here: https://clang.llvm.org/docs/AttributeReference.html )

I think this is https://bugs.llvm.org/show_bug.cgi?id=46446, which has
more details about the issues and plausible ways forward.

~Aaron

>
> On Thu, Dec 2, 2021 at 5:23 AM Владимир Фролов via cfe-users <cfe-users at lists.llvm.org> wrote:
>>
>> Dear colleguaes, it seems i have met the bug for processing of C++11 custom language attributes.
>>
>> 1) I took example from https://github.com/llvm/llvm-project/blob/main/clang/examples/Attribute/Attribute.cpp
>> 2) And make a short sample which reproduce the bug https://github.com/FROL256/clang_parse_ast_example
>>
>> The problem in that getNumArgs() is always zero, nevermind how many arguments we actually have in the attribute.
>> I have tested this with clang 12. I think i could test it under clang 14 if build sample as a part of llvm.
>> But probably i just did some-thing wrong ... ?
>>
>> Anyway it would be nice to have this issue working with clang 12 because usually i work with prebuild packages of clang and libtooling on Linux Mint.
>> Could you please look prepared sample and suggest sms if possible ... thanks! )
>> --
>> Best Regards,
>>  Frolov V.A.
>>
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