GCC/clang warning incompatibility with unused private member variables

Jakub Jelinek jakub@redhat.com
Fri Jun 11 20:35:57 GMT 2021

On Fri, Jun 11, 2021 at 04:03:34PM -0400, Jason Merrill via Gcc wrote:
> You can use #pragma to disable a warning for a particular section of code:
> #pragma GCC diagnostic push
> #pragma GCC diagnostic ignored "-Wattributes"
> class Test {
>      [[maybe_unused]] int a_;
>      void b() {};
> };
> #pragma GCC diagnostic pop
> But I also agree that GCC shouldn't warn here.

We could do that by using a wrapper around handle_unused_attribute
for the maybe_unused attribute, that way warn on unused attribute on
FIELD_DECLs, but not for maybe_unused (until we actually implement some
warning that uses it).


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