GitLab

Update Python bindings

See merge request !294

Added two tests and updated the CI file such that the tests are found and executed.

Imported the bindings from releases/2.7 and resolved the remaining
issues.

Add HierarchicalP2basis dune-functions implementation

See merge request !284

Use [[maybe_unused]] instead of DUNE_UNUSED

See merge request !293

Change 'Dune::void_t' to 'std::void_t'

See merge request !292

Simplify NedelecPreBasis using MCMGMapper

See merge request !291

Included Crouzeix-Raviart elements into Rannacher-Turek basis

See merge request !283

Added support for Crouzeix-Raviart functions with small modifications to
the existing Rannacher-Turek basis.

Implement caching of local DOFs in bind.

See merge request !229

We originally wanted to implement this cache but never did this.
I implemented a benchmarking computing the L^2 norm of FE
function with Lagrange-DG basis and various order for the DG
space and the quadrature rule.

It turned out that caching is neven harmful (even for low order).
But it may lead to minor improvements (up 10%) if the quadrature
order (and thus the number of local evaluations) is large.

In order to work properly for proxy-containers this uses
`AutonomousValue` to determine the storage type in the cache.

Change default-construction to explicit construction of treecontainer

See merge request !290

Change default-construction to explicit construction of treecontainer in DiscreteGlobalBasisFunction

Bugfix/followup remove nodeindexset

See merge request !288

Use correct constructor of `DefaultNodeIndexSet`. This was
not caught by the tests, because `DefaultLocalView` automatically
selects the new interface if available.

Feature/remove nodeindexset

See merge request !286

Deprecate...
* `PreBasis::makeIndexSet` and `PreBasis::IndexSet`,
* using `PreBasis` without `PreBasis::indices` in `DefaultGLobalBasis`,
* internal helpers used for a backward compatible transition.
  Since they are not part of the public user interface,
  this is only done in the documentation.

Having `TransformedIndexPreBasis::indices()` allows to use
the generic `DefaultNodeIndexSet` as a backward
compatible fall-back for a transition period.
Notice that a temporary `RawPreBasis<i>::IndexSet`
will be constructed during `TransformedIndexPreBasis::indices()`
if `RawPreBasis<i>::indices()` is not implemented.

Having `CompositePreBasis::indices()` allows to use
the generic `DefaultNodeIndexSet` as a backward
compatible fall-back for a transition period.
Notice that a temporary `SubPreBasis<i>::IndexSet`
will be constructed during `CompositePreBasis::indices()`
if `SubPreBasis<i>::indices()` is not implemented.

Having `PowerPreBasis::indices()` allows to use
the generic `DefaultNodeIndexSet` as a backward
compatible fall-back for a transition period.
Notice that a temporary `SubPreBasis::IndexSet`
will be constructed during `PowerPreBasis::indices()`
if `SubPreBasis::indices()` is not implemented.

Having `PreBasis::indices()` allows to use
the generic `DefaultNodeIndexSet` as a backward
compatible fall-back for a transition period.

A PreBasis providing the new `indices(node,iterator)`
interface can use the `DefaultNodeIndexSet` class to
still immplement the old interface for backward compatibility.
Once support for the old interface is removed, this helper
class will be removed, too.

The concept now allows both, the new and the
deprecated old one.

This provides support for `PreBasis` implementations directly
providing an `indices(node,iterator)` method, while still
supporting the old `NodeIndexSet`-based interface.

This also adds a concept check for the new intreface and
a fallback method `Impl::preBasisIndices(preBasis,node,it)`
that forwards to the old interface if the new one is not
implemented. The fallback method can be used inside of
a meta-prebasis as a replacement of `preBasis.indices(node,it)`
for a transition period.

Passing a prebasis not providing the new interface to
`DefaultGlobalBasis` is deprecated.

Use checkBasis in more tests

See merge request !287

Cleanup RaviartThomasBasis

See merge request !282

Feature/cleanup nedelec basis

See merge request !281

Enabled the low order hydrid-grid test in
`dune/functions/functionspacebasis/test/raviartthomasbasistest.cc`.

* Use `LFEVariant` instead of virtual interface for mixed grids.
  This allows to have value-semantics.
* Use a single container to store all required variants.
* For a single `GeometryType` grid only store the needed variants.
* For a mixed grid store all variants using `LFEVariant`.

Benefits:
* Less complicated storage
* No `GeometryType`-dependent look-up required in `find`

Added Nedelec elements of the first kind for 2D and 3D cubes

See merge request !280

Minor nedelec fixes

See merge request !279