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Hi,

in the following example

template<typename T>
class A {
public:
class B {
public:
B& operator++();
};
};

template<typename T>
typename A<T>::B& A<T>::B:perator++() {
return *this;
}

I get a warning


In file included from cvl0001.cc:1:
a.h:14: warning: prefix ‘typename A<T>::B& A<T>::B:perator++()’
should return ‘A<T>::B&’

Well, if define the op++() inside the nested template class B, all is
fine ...

What's wrong here?

--
Wilhelm

On 08/17/2011 09:40 AM, wimalopaan wrote:
> Hi,
>
> in the following example
>
> template<typename T>
> class A {
> public:
> class B {
> public:
> B& operator++();
> };
> };
>
> template<typename T>
> typename A<T>::B& A<T>::B:perator++() {
> return *this;
> }
>
> I get a warning
>
>
> In file included from cvl0001.cc:1:
> a.h:14: warning: prefix ‘typename A<T>::B& A<T>::B:perator++()’
> should return ‘A<T>::B&’
>
> Well, if define the op++() inside the nested template class B, all is
> fine ...
>
> What's wrong here?

got the same with g++ versions 4.3 and 4.4. versions 4.5 and 4.6 do not
complain so it looks like old-g++ problem.

--
pozdrawiam serdecznie / best regards,
Bartek 'BaSz' Szurgot

http://www.baszerr.org

On 17 Aug., 09:57, bartek szurgot <no...@m.plz> wrote:
> On 08/17/2011 09:40 AM, wimalopaan wrote:
>
>
>
>
>
>
>
>
>
> > Hi,
>
> > in the following example
>
> > template<typename T>
> > class A {
> > public:
> > * * class B {
> > * * public:
> > * * * * B& operator++();
> > * * };
> > };
>
> > template<typename T>
> > typename A<T>::B& A<T>::B:perator++() {
> > * * return *this;
> > }
>
> > I get a warning
>
> > In file included from cvl0001.cc:1:
> > a.h:14: warning: prefix ‘typename A<T>::B& A<T>::B:perator++()’
> > should return ‘A<T>::B&’
>
> > Well, if define the op++() inside the nested template class B, all is
> > fine ...
>
> > What's wrong here?
>
> got the same with g++ versions 4.3 and 4.4. versions 4.5 and 4.6 do not
> complain so it looks like old-g++ problem.
>
> --
> pozdrawiam serdecznie / best regards,
> Bartek 'BaSz' Szurgot
>
> http://www.baszerr.org

Thanks for the hint: g++ 4.7 (svn) is ok too!
--
wilhelm