[Bug c/45584] New: typeof with casting from const to non-const does not work properly

[Bug c/45584] New: typeof with casting from const to non-const does not work properly

[radoslaw dot biernacki at gmail dot com]

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typeof() does not property recognizes the non-const type, which was casted from
const type:

$ cat plik.c
#include <stdio.h>

int main()
{
    const unsigned long val;
    typeof( ((unsigned long)(val)) ) val2;
    val2 = 0; //compilation error
}

$ gcc -o plik plik.c
plik.c: In function âmainâ:
plik.c:7: error: assignment of read-only variable âval2â

$ gcc --version
gcc (GCC) 4.4.3 20100127 (Red Hat 4.4.3-4)
...


-- 
           Summary: typeof with casting from const to non-const does not
                    work properly
           Product: gcc
           Version: 4.4.3
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: radoslaw dot biernacki at gmail dot com
 GCC build triplet: 4.4.3 20100127 (Red Hat 4.4.3-4)
  GCC host triplet: Linux TVBuildAlfa 2.6.32.12-115.fc12.i686.PAE #1 SMP


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45584

[Bug c/45584] typeof with casting from const to non-const does not work properly

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2010-09-08 09:37 -------
Confirmed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-09-08 09:37:55
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45584

[Bug c/45584] typeof with casting from const to non-const does not work properly

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45584

--- Comment #2 from ppalka at gcc dot gnu.org ---
Author: ppalka
Date: Tue Aug 19 14:14:15 2014
New Revision: 214151

URL: https://gcc.gnu.org/viewcvs?rev=214151&root=gcc&view=rev
Log:
2014-08-19  Patrick Palka  <ppalka@gcc.gnu.org>

    PR c/45584
    * c-typeck.c (build_c_cast): Do a conversion even when the
    TYPE_MAIN_VARIANTs are the same.

2014-08-19  Patrick Palka  <ppalka@gcc.gnu.org>

    PR c/45584
    * gcc.dg/pr13519-1.c: Adjust.



Modified:
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-typeck.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/pr13519-1.c

[Bug c/45584] typeof with casting from const to non-const does not work properly

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=45584

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |mpolacek at gcc dot gnu.org
         Resolution|---                         |FIXED
   Target Milestone|---                         |5.0

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Should be fixed now.