Re: implicit typename is deprecated

["erwan ancel" <erwan dot ancel at free dot fr>]

thanks a lot. I got my answer :)

----- Original Message -----
From: "LLeweLLyn Reese" <llewelly@lifesupport.shutdown.com>
To: "erwan ancel" <erwan.ancel@free.fr>
Cc: <gcc-help@gcc.gnu.org>
Sent: Monday, January 27, 2003 11:39 AM
Subject: Re: implicit typename is deprecated


> "erwan ancel" <erwan.ancel@free.fr> writes:
>
> > Hi,
> > Does anyone know what this mean ?
> > "Implicit typename is deprecated"
>
> Dependent names which are type names are required to be qualified by
>     the keyword 'typename'.
>
> A dependent name is a name which is dependent on a template parameter.
>
> struct A
> {
>     struct nest{};
> };
>
> template<class T>
> struct contain
> {
>     typedef typename T::nest;
> };
>
> In the example above, 'T::nest' is a dependent name. Other common
>     dependent names are things like 'vector<T>::value_type' . Since
>     the parameters with which a template will be instantiated cannot
>     be known in general, and a given type may delcare 'nest' as a
>     static member, a data member, or a type member, or not at all, it
>     was felt the user should indicate when a dependent name is
>     intended/expected to be a type name. This allows better error
>     reporting, and potentially simpler implementation.
>
> > I got this message when compiling my template instanciations with gcc
3.2,
> > and the compilation fails, but I managed to compile this without any
> > warning/error with gcc 2.95.
> [snip]
>
> 3.2 is much closer to conformance than 2.95
>