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From: "barry.revzin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/104255] parsing function signature fails when it uses a
 function parameter outside of an unevaluated context
Date: Tue, 27 Feb 2024 05:12:52 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104255

Barry Revzin <barry.revzin at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |barry.revzin at gmail dot =
com

--- Comment #8 from Barry Revzin <barry.revzin at gmail dot com> ---
(In reply to Patrick Palka from comment #2)
> The error message is obscure, but it seems what GCC has issue with here is
> the use of the function parameter seq2 in the trailing return type occurr=
ing
> outside of an unevaluated context.
>=20
> I'm not totally sure if the testcase is valid
> (https://eel.is/c++draft/basic.scope.param#note-1 might suggest it's not?=
),

But we're not using the parameter for its "value" here (which I think means=
 in
the sense of lvalue-to-rvalue conversion... as in reading a parameter of ty=
pe
int), so I don't think this would be a reason to reject?=