incomplete enums in classes

[Stephane Chauveau <s dot chauveau at chello dot nl>]

I found a problem in gdb 5.2 when debugging g++ programs.
Enum types declared without a name within a class are incomplete.

Consider the following program:

> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
enum TYPE1 { V1 }  ; 
typedef enum { V2 } TYPE2 ; 
class FOO {
public:

  enum TYPE3 { V3  }  ;    typedef enum { V4 } TYPE4 ;  
  int v ; } ;

enum TYPE1 a ; TYPE2 b ; enum FOO::TYPE3 c ; FOO::TYPE4 d ; 
int
main(void)
{
  a = V1 ;   b = V2 ;   c = FOO::V3 ;   d = FOO::V4 ; }

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<


The problem appears in last line of the following gdb session.  
> > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >
Breakpoint 1, main () at test.cxx:23
23        a = V1 ; (gdb) s
24        b = V2 ; (gdb) s
25        c = FOO::V3 ; (gdb) s
26        d = FOO::V4 ; (gdb) s
0x080484f0      27      }
(gdb) p a
$1 = V1
(gdb) p b
$2 = V2
(gdb) p c
$3 = V3
(gdb) p d
$4 = <incomplete type>

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

I also found that giving a name to the enum solves the problem:

  typedef enum _TYPE4 { V4 } TYPE4 ;  
If this is feature then I would expect to see the same behavior
with the 'incomplete' type TYPE2.