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From: "glenjofe at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/96416] to_address() is broken by static_assert in pointer_traits
Date: Mon, 29 Mar 2021 03:08:26 +0000	[thread overview]
Message-ID: <bug-96416-4-PbKmH9biJf@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-96416-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96416

--- Comment #16 from Glen Joseph Fernandes <glenjofe at gmail dot com> ---
> should a wording defect be raised against std::to_address(Ptr), to state that 
> pointer_traits<Ptr> being well-formed is actually a prerequisite?

That's not an omission in the specification of to_address. The function is
intended for pointers, and specified in terms of checking for a
pointer_traits<P> member, and this means pointer_traits<P> must be well-formed. 

Adding an additional text to the specification saying this explicitly is
unlikely to help anyone. The real change that users of iterators[1] would want
is to make pointer_traits SFINAE friendly.

[1] Users of pointers don't care much, since all the pointer types people are
using with to_address(p) already have a well-formed pointer_traits<P>.

  parent reply	other threads:[~2021-03-29  3:08 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-02  4:17 [Bug libstdc++/96416] New: address_of() " whatwasthataddress at gmail dot com
2020-08-03 12:58 ` [Bug libstdc++/96416] " redi at gcc dot gnu.org
2020-08-03 15:34 ` whatwasthataddress at gmail dot com
2020-08-03 15:38 ` redi at gcc dot gnu.org
2020-11-11 17:46 ` redi at gcc dot gnu.org
2020-11-11 18:52 ` redi at gcc dot gnu.org
2020-11-11 19:10 ` redi at gcc dot gnu.org
2020-11-11 20:05 ` glenjofe at gmail dot com
2020-11-11 20:40 ` redi at gcc dot gnu.org
2020-11-11 20:41 ` redi at gcc dot gnu.org
2021-03-26 14:19 ` dangelog at gmail dot com
2021-03-26 14:45 ` dangelog at gmail dot com
2021-03-26 23:44 ` glenjofe at gmail dot com
2021-03-27  0:48 ` [Bug libstdc++/96416] to_address() " redi at gcc dot gnu.org
2021-03-27  1:41 ` arthur.j.odwyer at gmail dot com
2021-03-27 16:53 ` dangelog at gmail dot com
2021-03-27 19:46 ` redi at gcc dot gnu.org
2021-03-29  3:08 ` glenjofe at gmail dot com [this message]
2021-04-20 20:11 ` redi at gcc dot gnu.org
2021-04-21  8:45 ` dangelog at gmail dot com
2021-08-05 22:55 ` gcc-bugs at marehr dot dialup.fu-berlin.de
2021-09-28 14:00 ` [Bug libstdc++/96416] [DR 3545] " redi at gcc dot gnu.org
2021-11-25 23:12 ` cvs-commit at gcc dot gnu.org
2021-11-26 17:46 ` cvs-commit at gcc dot gnu.org
2021-11-26 17:52 ` redi at gcc dot gnu.org
2021-12-09  1:24 ` whatwasthataddress at gmail dot com
2022-06-28 10:41 ` jakub at gcc dot gnu.org
2023-07-07  9:00 ` rguenth at gcc dot gnu.org

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