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From: "gcc at alanwu dot email" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/101265] C2X [[maybe_unused]] ignored when placed after array
 declaration
Date: Thu, 01 Jul 2021 13:21:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101265

Alan Wu <gcc at alanwu dot email> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #4 from Alan Wu <gcc at alanwu dot email> ---
Thank you! The key paragraph in N2596 seems to be 6.7.6.2p3. I also reached=
 out
to Aaron Ballman for clarification.

gcc is right to ignore the attribute in this case. g++ accepting the attrib=
ute
is potentially an issue, since the C++ spec has similar rules ([dcl.array]p=
3).

Clang accepting the attribute also seems to be a bug. There is now a ticket=
 for
it: https://bugs.llvm.org/show_bug.cgi?id=3D50954=