deprecated attributes vs. class templates

["Benjamin Kosnik" <bkoz at redhat dot com>]

Hey! I'm trying to figure out how to mark up std::auto_ptr as
deprecated when in C++0x mode.

From:

http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax

and

http://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html#Type-Attributes

I gather that this attribute may work for C++. However, all my
attempted spell-casting to make use of this fail:

// no warning, but doesn't work
 template<typename _Tp>
 struct __attribute__ ((deprecated)) auto_ptr;

// warns ignored
 template<typename _Tp>
 __attribute__ ((deprecated)) struct  auto_ptr;

// warns ignored
 template<typename _Tp>
 struct  auto_ptr __attribute__ ((deprecated)) ;

And similar for the various placements around the definition.

I would assume that this means that the deprecated attribute doesn't
work in C++ mode, but then:

 template<typename _Tp>
   struct auto_ptr
   {
   private:
     _Tp* _M_ptr;
   };

int main()
{
 typedef auto_ptr<int> test_type;
 typedef auto_ptr<short> test2_type __attribute__ ((deprecated));

 test_type obj;
 test2_type obj2;

 return 0;
}

gets me where I want to go, or at least partially where I want to go:
test2_type gets the deprecated warning.

So, now I'm wondering what I can expect, if I've not got the correct
syntax, or if this doesn't work (hasn't ever) and thus I should file a
feature-request/enhancement for this functionality. Something like
this will be necessary as many of the C++0x deprecated features are
mixed within existing includes, which make the previous strategy of
just warning on a per-file basis impossible.

Help!

best,
benjamin