[Bug libstdc++/14926] [3.4/3.5 regression] forward declarations and strong using

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-04-12 20:00 -------
I was under the impression that an implementation was allowed to declare 
(for example) its vector class as 
  template <typename T, typename Allocator = alloc<something>, 
            typename additional_parameter=something > 
  class vector {...}; 
and that this was the reason to make forward declarations of classes in 
namespace std:: undefined. I may be wrong, though. It doesn't also matter 
here. 
 
W. 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14926