[Bug c++/13051] New: problem with static member and ?: operator

[Bug c++/13051] New: problem with static member and ?: operator

[mihai_preda at yahoo dot com]

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class A {
public:
    static const int a = 1;
    static const int b = 2;
};

int main(int argc) {
    return (argc == 0) ? A::a : A::b;

    /*                                                                         
                                                      
    if (argc == 0) {                                                           
                                                      
        return A::a;                                                           
                                                      
    } else {                                                                   
                                                      
        return A::b;                                                           
                                                      
    }                                                                          
                                                      
    */
}

when linking, I get
/tmp/ccEecr0u.o: In function `main':
/tmp/ccEecr0u.o(.text+0x17): undefined reference to `A::b'
/tmp/ccEecr0u.o(.text+0x21): undefined reference to `A::a'

But when I use the commented-out 'if' instead of '?:', it compiles&links OK.

$g++ -v
Lecture des spécification à partir de
/xyleme/Linux/gcc3/usr/gcc/lib/gcc-lib/i686-pc-linux-gnu/3.2.3/specs
Configuré avec: ./configure --prefix=/xyleme/Linux/gcc3/usr/gcc --enable-threads
Modèle de thread: posix
version gcc 3.2.3

$uname -a
Linux xxx 2.4.18-64GB-SMP #1 SMP Wed Mar 27 13:58:12 UTC 2002 i686 unknown

-- 
           Summary: problem with static member and ?: operator
           Product: gcc
           Version: 3.2.3
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mihai_preda at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13051

[Bug c++/13051] problem with static member and ?: operator

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2003-11-14 14:53 -------
This is one of the most often reported non-bugs. You need to
have a _definition_ of the static member, not only a declaration.

Add the lines
  const int A::a;
  const int A::b;
to your program and everything should be ok.

W.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13051

[Bug c++/13051] problem with static member and ?: operator

[mihai_preda at yahoo dot com]

------- Additional Comments From mihai_preda at yahoo dot com  2003-11-14 15:47 -------
I know that the static inside the class is only a declaration, and not a definition.

But it seems that, in this situation, a definition should not be needed at all.
That's why I gave the "if" alternative (in the commented block) which links just
fine without any definition of the static members.

What I consider as a bug is the different behavior of the "?:" from the "if"
equivalent. IMO the "?:" should behave the same way "if" does ("if" doesn't
require the definition).

Thanks

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13051

[Bug c++/13051] problem with static member and ?: operator

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2003-11-14 16:12 -------
The compiler is still allowed to require a definition. That's
what the standard says, so there is no bug here.

That being said, I think Mark fixed this a while ago on
mainline. At least it compiles on mainline.

W.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13051

[Bug c++/13051] problem with static member and ?: operator

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-28 02:02 -------
reopening to ....

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13051

[Bug c++/13051] problem with static member and ?: operator

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-28 02:03 -------
Mark as a dup of bug 14404.

*** This bug has been marked as a duplicate of 14404 ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13051