Yes, the lambda worked, thanks!
Am Donnerstag, 27. Februar 2020 17:00:12 UTC+1 schrieb Wolfgang Bangerth:
>
>
> > |
> > Functions::InterpolatedTensorProductGridData<dim>
> interpolator(this->coordinate_values,
> >
> this->data_storage);
> >
> > VectorFunctionFromScalarFunctionObject<dim>
> interpolator_object(&interpolator.value,
>
> The error...
>
> > but the compilation fails with
> > error: ISO C++ forbids taking the address of a bound member function to
> > form a pointer to member function. Say
> > ‘&dealii::Functions::InterpolatedTensorProductGridData<2>::value’.
>
> ...comes from the line above. The problem is that
> &object.functionname
> is simply not something that C++ understands. What you need is a
> function object that takes a Point and returns a double. You can use
> std::bind(&Functions::InterpolatedTensorProductGridData<dim>::value,
> &interpolator)
> as this argument, or maybe more modern, write
> [&interpolator] (const Point<dim> &p) { return interpolator.value(p); }
> in place of the first constructor argument to interpolator_object.
>
> Best
> W.
> --
> ------------------------------------------------------------------------
> Wolfgang Bangerth email: bang...@colostate.edu
> <javascript:>
> www: http://www.math.colostate.edu/~bangerth/
>
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