This is the mail archive of the
gcc-help@gcc.gnu.org
mailing list for the GCC project.
Re: Template Explicit Instantiation error
- From: Axel Freyn <axel-freyn at gmx dot de>
- To: gcc-help at gcc dot gnu dot org
- Date: Mon, 2 Nov 2009 19:38:04 +0100
- Subject: Re: Template Explicit Instantiation error
- References: <26157764.post@talk.nabble.com>
Hi,
On Mon, Nov 02, 2009 at 10:20:12AM -0800, GodfatherofSoul wrote:
> I'm trying to migrate some Visual Studio code to gcc, but I'm getting errors
> with some of our template usage:
>
> class ParentClass
> {
> public:
> class NestedForwardDeclaration;
>
> template class SomeTemplateClass<NestedForwardDeclaration>;
>
> class NestedForwardDeclaration
> {
> ...
> };
>
> };
>
> BTW, this is distilled down to the core cause of the problem, so you really
> can't see the rationale for this convention. The complication error I get
> is on the "template class.." line:
>
> error: expected `<' before 'class'
>
> Does anyone understand why this fails?
Yes, I believe so;-)
> Note that this same code compiles and runs with the Microsoft compiler.
It shouldn't... According to the C++-standard, you have to write instead
template <> class SomeTemplateClass<NestedForwardDeclaration>;
Axel