[dune-functions] Access sub-preBasis of PowerBasis
graeser at mi.fu-berlin.de
Tue May 21 11:36:14 CEST 2019
Am 21.05.19 um 11:02 schrieb Lasse Hinrichsen:
> Dear dune-functions experts,
> I was wondering how to access the underlying PreBasis of a power basis
> (similarly, for a composite).
[...]> and `my_fancy_prebasis` contains something I still need at runtime (say,
> the order of ansatz functions which I may want to change during runtime).
> Is there a way to access this (sub-)PreBasis? Clearly, the PowerPreBasis
> holds it as a member, but it does not provide access to it. Of course,
> one could easily provide access there, but I wonder, if
Yes this is missing currently. To my impression whoever
wrote the PowerPreBasis simply forgot to add this and
I don't see any problem in changing this.
I would propose to add
auto& subPreBasis(std::size_t index)
const auto& subPreBasis(std::size_t index) const
to PowerPreBasis and
template<std::size_t index> auto& subPreBasis()
template<std::size_t index> auto& subPreBasis(Dune::index_constant<index>)
template<std::size_t index> const auto& subPreBasis() const
template<std::size_t index> const auto& subPreBasis(Dune::index_constant<index>) const
to CompositePreBasis. Would this satisfy your requirements?
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