Hello, if you are using the PostProcessor subclass within output_results(),
then is not required to use FracturePhaseFieldProblem<2>::Postprocessor as
the class and the function are in the same main class
FracturePhaseFieldProblem.
I think this can be the problem.
Regards,
Athul
On Wed, Jan 31, 2024 at 7:16 AM Tiny Y <yuyi2...@163.com> wrote:
> Hi,
> I built a class called FracturePhaseFieldProblem<dim> , which contains
> a subclass called class Postprocessor，
>
> template <int dim>
>
> class FracturePhaseFieldProblem
>
> {
>
> public:
>
> …
>
> private:
>
> …
>
> void output_results () const;
>
> class Postprocessor;
>
> …
>
> };
>
> However when I want to declare a variable as the type
> FracturePhaseFieldProblem<2>::Postprocessor in function output_results (),I
> got the error:
>
> error: cannot declare variable ‘postprocessor’ to be of abstract type
> ‘FracturePhaseFieldProblem<2>::Postprocessor’
>
> Thank you very much.
>
> Best,
>
> Yu
>
>
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