[Bug c++/17644] New: unexpected symbol redefinition error

[Bug c++/17644] New: unexpected symbol redefinition error

[boris at kolpackov dot net]

$ cat >text.cxx
struct foo
{
};

struct bar
{
  foo
  foo ();
};

$ g++ --version
g++ (GCC) 3.3.4 (Debian 1:3.3.4-12)

$ g++ -c test.cxx
test.cxx:8: error: declaration of `foo bar::foo()'
test.cxx:2: error: changes meaning of `foo' from `struct foo'

$ g++-3.4 --version
g++-3.4 (GCC) 3.4.2 (Debian 3.4.2-2)

$ g++ -c test.cxx
test.cxx:8: error: declaration of `foo bar::foo()'
test.cxx:2: error: changes meaning of `foo' from `struct foo'

This code compiles fine with both intel c++ 8.1 and current comeau online.

-- 
           Summary: unexpected symbol redefinition error
           Product: gcc
           Version: 3.4.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: boris at kolpackov dot net
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-linux
  GCC host triplet: i686-linux
GCC target triplet: i686-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-09-23 22:50 -------
No GCC is correct, foo cannot be redefined in the same class where you use it differently.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[boris at kolpackov dot net]

------- Additional Comments From boris at kolpackov dot net  2004-09-24 18:52 -------
And what about this:

class foo
{
};

struct bar
{
  ::foo
  foo ();
};

illegal too?

And this

struct bar
{
  struct foo
  {
  };

  foo
  foo ();
};

should definitely be illegal, right?



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-09-24 18:57 -------
The first example is valid because ::foo is explicantly named but the second is invalid.  Basically in C++ 
you have to "reparse" the struct again after finishing the struct  and the standard says that if the type is 
different than before it is an error.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[boris at kolpackov dot net]

------- Additional Comments From boris at kolpackov dot net  2004-09-24 19:06 -------
> the second is invalid

however it is accepted by g++ 3.4.2

> Basically in C++ you have to "reparse" the struct again after finishing
> the struct  and the standard says that if the type is  different than 
> before it is an error.

You mean the type of symbol is different or the type is different? I always
thought that types and functions form separate symbol spaces. If what you are
saying is true then the following is illegal too, right?

struct foo
{
};

foo
foo ();



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-06 21:18 -------
*** Bug 18320 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |igodard at pacbell dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-31 05:40 -------
Reopening to ...

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644

[Bug c++/17644] unexpected symbol redefinition error

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-31 05:40 -------
Mark as a dup of bug 17353.

*** This bug has been marked as a duplicate of 17353 ***

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17644