[Bug c++/64446] Misleading error message when inheriting from a template class w/o the template params

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64446

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-03-09
     Ever confirmed|0                           |1

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to petschy from comment #0)
> 'Base' is definitely a valid class name.

No it isn't, Base is a class template, and that is not a class. The error
message is completely accurate, although it could be improved to say how to fix
the code.


Clang also says:

p.cc:6:14: error: expected class name
struct Foo : Base
             ^


EDG gives a better error:

"p.cc", line 6: error: argument list for class template "Base" is missing
  struct Foo : Base
               ^

"p.cc", line 6: error: not a class or struct name
  struct Foo : Base
               ^


Ideally the compiler would recognise that Base is a template and point out that
the template argument list is missing.