From: Jason Merrill <jason@redhat.com>
To: Marek Polacek <polacek@redhat.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>,
Joseph Myers <joseph@codesourcery.com>
Subject: Re: C/C++ PATCH to implement -Wpointer-compare warning (PR c++/64767)
Date: Fri, 23 Sep 2016 14:37:00 -0000 [thread overview]
Message-ID: <CADzB+2=jzF5uFTOR7L5SAu8vnS+y8nRhB15Aj+7ZNOPQFkJfPQ@mail.gmail.com> (raw)
In-Reply-To: <20160923131537.GB3223@redhat.com>
On Fri, Sep 23, 2016 at 9:15 AM, Marek Polacek <polacek@redhat.com> wrote:
> On Wed, Sep 21, 2016 at 03:52:09PM -0400, Jason Merrill wrote:
>> On Mon, Sep 19, 2016 at 2:49 PM, Jason Merrill <jason@redhat.com> wrote:
>> > I suppose that an INTEGER_CST of character type is necessarily a
>> > character constant, so adding a check for !char_type_p ought to do the
>> > trick.
>>
>> Indeed it does. I'm checking this in:
>
> Nice, thanks. What about the original patch? We still need to warn
> (or error for C++11) for pointer comparisons.
If we still accept pointer comparisons in C++, that's another bug with
treating \0 as a null pointer constant. This seems to be because
ocp_convert of \0 to int produces an INTEGER_CST indistinguishable
from literal 0.
Jason
next prev parent reply other threads:[~2016-09-23 14:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-10 15:06 Marek Polacek
2016-09-10 15:13 ` Jakub Jelinek
2016-09-10 15:48 ` Marek Polacek
2016-09-14 5:56 ` Jason Merrill
2016-09-15 12:31 ` Marek Polacek
2016-09-19 19:51 ` Jason Merrill
2016-09-21 19:55 ` Jason Merrill
2016-09-23 13:29 ` Marek Polacek
2016-09-23 14:37 ` Jason Merrill [this message]
2016-09-30 16:52 ` Marek Polacek
2016-09-30 17:22 ` Martin Sebor
2016-09-30 19:52 ` Martin Sebor
2016-09-30 20:02 ` Marek Polacek
2016-09-30 22:16 ` Martin Sebor
2016-09-30 22:16 ` Jason Merrill
2016-10-01 14:41 ` Marek Polacek
2016-10-02 18:43 ` Jason Merrill
2017-01-04 6:56 ` Eric Gallager
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