c++/10749: [3.3/3.4 regression] triple nested template classes in namespace need to qualify ns

[bangerth@dealii.org]

Old Synopsis: regression from 2.95.3: triple nested template classes in namespace need to qualify ns
New Synopsis: [3.3/3.4 regression] triple nested template classes in namespace need to qualify ns

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Mon May 12 15:31:43 2003
State-Changed-Why:
    Confirmed. This is a regression in 3.3 and 3.4, though 
    with different failure modes:
    ------------------------------------
    namespace ns {
    
      template<typename T>
      struct Foo {
          template<typename U> struct Bar;
      };
    
      template<typename T>
      template<typename U>
      struct Foo<T>::Bar {
          template<typename V> struct Baz;
      };
    
      template<typename T>
      template<typename U>
      template<typename V>
      struct Foo<T>::Bar<U>::Baz {
          Foo<T> chokes;
          ns::Foo<T> works;
      };
    
    }
    ---------------------------
    
    The code is legal, and 2.95 compiles it, but 3.3 and
    3.4 reject it for different reasons:
    
    g/x> c++ -c x.cc
    g/x>
    g/x> /home/bangerth/bin/gcc-3.3-pre/bin/c++ -c x.cc
    x.cc:18: error: non-template type `Foo' used as a template
    x.cc:18: error: ISO C++ forbids declaration of `chokes' with no type
    g/x>
    g/x> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -c x.cc
    x.cc:17: error: too many template-parameter-lists
    

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10749