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* [Bug c/64423] New: Incorrect column number of -Wchar-subscripts
@ 2014-12-28  6:10 chengniansun at gmail dot com
  2014-12-29 20:52 ` [Bug c/64423] " mpolacek at gcc dot gnu.org
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: chengniansun at gmail dot com @ 2014-12-28  6:10 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64423

            Bug ID: 64423
           Summary: Incorrect column number of -Wchar-subscripts
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chengniansun at gmail dot com

The column number of -Wchar-subscripts is not precise. It always starts at the
beginning of the statement. 

$: cat t.c
int a[100];

int f(char c) {
  return a[c] + a[c] + a[c];
}

$: 
$: gcc-trunk -Wchar-subscripts -c t.c
t.c: In function ‘f’:
t.c:4:3: warning: array subscript has type ‘char’ [-Wchar-subscripts]
   return a[c] + a[c] + a[c];
   ^
t.c:4:3: warning: array subscript has type ‘char’ [-Wchar-subscripts]
t.c:4:3: warning: array subscript has type ‘char’ [-Wchar-subscripts]

$: 
$: clang-trunk -Wchar-subscripts -c t.c
t.c:4:11: warning: array subscript is of type 'char' [-Wchar-subscripts]
  return a[c] + a[c] + a[c];
          ^~
t.c:4:18: warning: array subscript is of type 'char' [-Wchar-subscripts]
  return a[c] + a[c] + a[c];
                 ^~
t.c:4:25: warning: array subscript is of type 'char' [-Wchar-subscripts]
  return a[c] + a[c] + a[c];
                        ^~
3 warnings generated.
>From gcc-bugs-return-471794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Dec 28 06:19:23 2014
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/64423] Incorrect column number of -Wchar-subscripts
Date: Sun, 28 Dec 2014 06:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd423

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-12-28
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
That is because warn_array_subscript_with_type_char does not take a location
and does not use warningat but rather just warning.

Confirmed.


^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-01-05 12:05 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-12-28  6:10 [Bug c/64423] New: Incorrect column number of -Wchar-subscripts chengniansun at gmail dot com
2014-12-29 20:52 ` [Bug c/64423] " mpolacek at gcc dot gnu.org
2015-01-05 12:04 ` mpolacek at gcc dot gnu.org
2015-01-05 12:05 ` mpolacek at gcc dot gnu.org

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