[cfe-dev] Using clang-tidy to fix compiler errors

[David Blaikie via cfe-dev]

I think there's some confusion here.

I think Alex doesn't want to run any checks - just wants the clang
diagnostic fixits applied - they can get this behavior by running
clang-tidy with some checks enabled, but there's no "run clang-tidy with no
checks, just with clangs actual errors/fixits".

I think maybe Alex should be running clang -fixit ? That might be how you
get "clang-tidy without any tidy checks" behavior.

On Sat, Oct 26, 2019 at 4:00 AM Matthieu Brucher via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hi,
>
> I think the usual way to do this is to disable checks and then select the
> ones you need. It's not a bug, it's a feature.
>
> Matthieu
>
> Le sam. 26 oct. 2019 à 11:55, Alexander Lanin via cfe-dev <
> cfe-dev at lists.llvm.org> a écrit :
>
>> Done, thanks.
>> https://bugs.llvm.org/show_bug.cgi?id=43816
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Jonas Toth <development at jonas-toth.eu>
>> Gesendet: Donnerstag, 24. Oktober 2019 20:13
>> An: Alexander Lanin <alex at lanin.de>; cfe-dev at lists.llvm.org
>> Betreff: Re: [cfe-dev] Using clang-tidy to fix compiler errors
>>
>> Hi Alexander,
>>
>> clang-tidy runs the frontend first, so if the frontend detects errors it
>> will report them as well.
>>
>> There is a feature in the frontend itself that tries to fix bugs, e.g.
>> s"foo.method()"/"foo->method()" fixits can be emitted.
>>
>> I think that is closer to what you want and might be a better place to
>> request that feature.
>>
>> Best Regards
>> Jonas
>>
>> Am 22.10.19 um 00:59 schrieb Alexander Lanin via cfe-dev:
>> > Hello,
>> >
>> > clang-tidy can not only be used to improve code, but also to make it
>> > work in the first place.
>> >
>> > Taking an example from
>> > https://github.com/llvm-mirror/clang/blob/master/test/SemaTemplate/dep
>> > endent
>> > -template-recover.cpp
>> >
>> >     template<typename T, typename U, int N>
>> >     struct X {
>> >       void f(T* t) {
>> >         t->f0<U>(); // expected-error{{use 'template' keyword to treat
>> 'f0'
>> > as a dependent template name}}
>> >       }
>> >     };
>> >
>> > Clang-tidy is capable of fixing that error.
>> > However it's not possible to fix it without running any other checks?!
>> > e.g. this works fine: clang-tidy --checks="*" test.cpp -fix-errors but
>> > it performs all sorts of other changes.
>> >
>> > The best approach seems to be to pick some checker that doesn't find
>> > anything in order to fix only errors ?!
>> >
>> > Thanks,
>> > Alexander Lanin
>> >
>> >
>> > _______________________________________________
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>>
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>
>
> --
> Quantitative researcher, Ph.D.
> Blog: http://blog.audio-tk.com/
> LinkedIn: http://www.linkedin.com/in/matthieubrucher
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