[GCC-XML] Nested template class not declared?

[Brad King]

Wesley Tansey wrote:
> Sorry, to clarify: I mean it does not output fields for the classes
> A<int> nor A<double>.
[snip]
>>> class B
>>> {
>>>    std::map<std::map<A<int>, int>, std::vector<double> > combo;
>>>    std::map<A<double>, int> single;
>>> }

This is because nothing in your example actually causes the templates to
be instantiated.  If you create an instance of B in main then A<double>
will get instantiated and dumped.  GCC-XML does not dump un-instantiated
templates.  There is a FAQ entry about why.  You can force the
instantiation of A<double> like this:

struct B
{
  typedef A<double>::A key_type;
  std::map<key_type, int> single;
};

Note the "::A" in the typedef.  This access a member of A<double> which
forces instantiation of its interface.

-Brad