Re: Calling inherited protected method fails to compile

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
microsoft.public.vc.language
Date:
Tue, 13 May 2008 13:25:45 +0200
Message-ID:
<WbOdnV3tLf8m57TVnZ2dnUVZ_h7inZ2d@posted.comnet>
* nomad:

     (void) b.F(3);
This cast is completely unnecessary.


True, but I like to indicate that I know there's a return value but that I'm
explicitly ignoring it.

For your question about why you get a compilation error, see the FAQ
item titled "What's the meaning of, Warning: Derived::f(char) hides
Base::f(double)?", currently item 23.9, available at e.g. <url:
http://www.parashift.com/c++-faq-lite/strange-inheritance.html#faq-23.9>,
or any mirror.


Well, I checked the FAQ for inheritance issues, but missed that one. If the
compiler had given me a 'derived f(char) hides base::f(double)' error, I'd've
known what was going on.


Yes, I notice that neither MSVC nor g++ produce that warning, which
would have been good.

I'd forgotten about C++'s silly failure to resolve
overloads across scopes.


It's not a failure, it's an intentional design decision.

Either way there are (non-obvious) problems, which means that either
way the behavior is a little counter-intuitive.

The language designer and the committee believed that this design
choice minimized the problems, but unfortunately it's also the most
counter-intuitive, at least judging from Usenet questions about it...

Thanks for the pointer.


You're welcome.

Cheers,

- Alf

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