[Kde-nonlinux] Re: Compilation of arts on HPUX - namespace problems?

[Michael Matz]

Hi,

On Thu, 11 Apr 2002, Harri Porten wrote:

> > Error 283: "common.h", line 84 # Illegal operand type in call expression.
> >                     ObjectReference reference(buffer);
> >                                     ^^^^^^^^^
> > According to my understanding, a class needs to be declared (not defined)
> > before it is referenced elsewhere. So the error message does not seem to make
> > sense to me.
>
> My interpretation is different: as an object of type ObjectReference is
> instanciated the compiler has to see the full definition. As
> ObjectReference is only defined in a header that includes common.h I think
> the compiler is right and the problem would be non-trivial to fix.

You would be right, if this weren't a template function.  Only when
instantiating it the full definition of ObjectReference is needed.
Classes used in a template do not have to be known yet, just
forward-declared.  I.e. it's a compiler bug I would say.


Ciao,
Michael.