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Re: C/C++ PATCH to add -Wdangling-else option
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Bernd Schmidt <bschmidt at redhat dot com>
- Cc: Marek Polacek <polacek at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Joseph Myers <joseph at codesourcery dot com>
- Date: Wed, 13 Apr 2016 17:16:12 +0200
- Subject: Re: C/C++ PATCH to add -Wdangling-else option
- Authentication-results: sourceware.org; auth=none
- References: <20160413141444 dot GT28445 at redhat dot com> <570E6218 dot 6020503 at redhat dot com>
- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Wed, Apr 13, 2016 at 05:13:28PM +0200, Bernd Schmidt wrote:
> On 04/13/2016 04:14 PM, Marek Polacek wrote:
> >This patch is meant to be applied on top of the "Wparentheses overhaul" patch.
> >
> >I really think that warning about the dangling else problem isn't appropriate
> >as a part of the -Wparentheses warning, which I think should only deal with
> >stuff like precedence of operators, i.e. things where ()'s are missing and not
> >{}'s.
> >
> >This new warning is, however, a subset of -Wparentheses.
> >
> >Bootstrapped/regtested on x86_64-linux, ok for trunk or should I stash it
> >for the next stage1?
>
> I think it's not appropriate for now. I'm ambivalent about the concept; my
> (vague) recollection is that putting it under -Wparentheses was Kenner's
> idea, and it's been there so long that I'm not sure there's really a point
> to changing this. In a sense it is a very similar problem as operator
> precedence.
Well, even with the change it is still included with -Wparentheses, just
it is a suboption with more specific name that can be enabled/disabled
independently from -Wparentheses if needed.
Though, of course, it can wait for GCC 7.
Jakub