On Mon, Jan 30, 2012 at 6:54 AM, m...@apollinemike.com
<m...@apollinemike.com> wrote:
> Hey all,
>
> I'm doing some work on the stencil class and I have a programming question.
>
> I'm experimenting with the following code:
>
> class Stencil
> {
> Box dim_;
> SCM expr_;
> Drul_array<Stencil> children_;
> ../flower/include/drul-array.hh: In instantiation of 'Drul_array<Stencil>':
> ./include/stencil.hh:63: instantiated from here
> ../flower/include/drul-array.hh:32: error: 'Drul_array<T>::array_' has
> incomplete type
> ./include/stencil.hh:60: error: forward declaration of 'class Stencil'
> make: *** [out/articulations.o] Error 1
>
> When I change the Drul_array to a vector, this problem goes away. I would,
> however, like it to be a Drul_array (or even better, a pair, but pair gives
> me the same forward declaration error as Drul_array). Does anyone know a way
> to declare this thing correctly so that I don't get the forward declaration
> error?
It's not possible. A vector<X> internally creates a pointer to X,
which is why it doesn't need to know about X, but drul_array doesn't
work like that.
Just include stencil.hh and be done with it.
--
Han-Wen Nienhuys - han...@xs4all.nl - http://www.xs4all.nl/~hanwen
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