Manapragada Srinivas (srinivas@lgc.com) wrote:
: Is the following forward declaration valid?
:
:   class foo : public bar;
:
: Where I am trying to declare that foo is a class which is publicly derived from
: bar. It works like a charm in g++ 2.2.2, whereas SUN CC2.1 results in a syntax
: error. Which behaviour conforms to the standard? The ARM is silent on this
: issue. When I followed the grammar in the appendix the above type of syntax did
: not seem to be valid.
:
: I would apreciate it very much if someone could shed some light on the above.
:
: Thanks,
: Srinivas
: --
: Yonder, beyond the event horizon!

--

I would say that is an invalid syntax since it is not in the grammar.

srinivas@lgc.com (Manapragada Srinivas) writes:
>Is the following forward declaration valid?
>  class foo : public bar;

No.  I think the standards committee is looking into different ways of
`forward declaring' more information.  Nested types also present similar
problems.

Chris