[Swig-user] C++ namespace confusion ?

[nerochiaro <ner...@gm...>]

Hi,
I'm having a problem where it seems that either me or SWIG is getting
a bit confused, and want to understand which one actually is.
Probably there's something obvious that i'm missing, but I can't see what i=
t is.
I have reduced it to the following testcase:

-------------- namesp.cxx --------------------
namespace TagLib
{
   class File {
   public:
      File() {};
    };
   class AudioProperties { };

   namespace FLAC
   {
      class File;
      class Properties : public AudioProperties  {
      public:
         Properties(File *file);
      };
      class File {
      public:
         File() {};
      };
   }
}

--------------- namesp.i ----------------------
%module "namesp"
%rename(FLACFile) TagLib::FLAC::File;
%{
#include "namesp.cxx"
%}
%include "namesp.cxx"
------------------------------------------------

Now, i feed this to swig and it doesn't complain:

me@mybox:~/$ swig -c++ -ruby -Wall namesp.i

But when i feed the generated file to g++, here's the output:

me@mybox:~/$ g++ -Wall -I/usr/lib/ruby/1.8/i486-linux -c namesp_wrap.cxx
namesp_wrap.cxx: In function 'VALUE _wrap_new_Properties(int, VALUE*, VALUE=
)':
namesp_wrap.cxx:1634: error: no matching function for call to
'TagLib::FLAC::Properties::Properties(TagLib::File*&)'
namesp.cxx:15: note: candidates are:
TagLib::FLAC::Properties::Properties(TagLib::FLAC::File*)
namesp.cxx:13: note:               =20
TagLib::FLAC::Properties::Properties(const TagLib::FLAC::Properties&)

Note that g++ doesn't complain against namesp.cxx if i try to feed
that file directly to him, so I guess it's valid C++. It seems that
it's SWIG gets confused between TagLib::File and TagLib::FLAC::File,
because here's the generated wrapper i get (snipped as needed):

_wrap_new_Properties(int argc, VALUE *argv, VALUE self) {
  TagLib::File *arg1 =3D (TagLib::File *) 0 ;
  TagLib::FLAC::Properties *result =3D 0 ;
//...
  result =3D (TagLib::FLAC::Properties *)new TagLib::FLAC::Properties(arg1)=
;
//...
}

The "strange" thing (at least for me), is that if I remove from the
c++ file any mention of the TagLib::AudioProperties base class, then
everything works fine.
This looks even more weird to me.

Is this whole thing a bug or am i doing something wrong and i'm badly confu=
sed ?

Thanks and sorry for the overly long message.