From: Gavin Ray <ray.gavin97@gmail.com>
To: gcc@gcc.gnu.org
Subject: Using [[may_alias]] in C23/C++23 on a union works in neither post-"union" position, or at the end of the definition
Date: Mon, 5 Dec 2022 22:17:33 -0500 [thread overview]
Message-ID: <CAFtvWZM89spjQ6es3UZsyRNcthZ49TvXUFvwy1cw3qr8qvpfyQ@mail.gmail.com> (raw)
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The reproduction is below. Not sure if this is intended or a bug, sorry to
clutter up the mailing list if it's intended!
union __attribute__((may_alias)) works {};
// <source>:3:18: note: attribute for 'union broken2' must follow the
'union' keyword
union broken1 {} [[may_alias]];
// Okay, so let's move it so it follows union...
// <source>:7:21: warning: 'may_alias' attribute directive ignored
[-Wattributes]
// 7 | union [[may_alias]] broken2 {};
// | ^~~~~~~
union [[may_alias]] broken2 {};
next reply other threads:[~2022-12-06 3:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-06 3:17 Gavin Ray [this message]
2022-12-06 16:54 ` Joseph Myers
2022-12-06 18:35 ` Gavin Ray
2022-12-06 19:23 ` Jonathan Wakely
2022-12-06 20:31 ` Gavin Ray
2022-12-06 20:36 ` Jonathan Wakely
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