Working:
- Driver block
- Solving and visualization

Not working:
- Error calculation

These methods are part of the driver block class interface and should also be
generated if they are not used from the main function.

[ ] Go through system part -> GFS
[ ] Export boundary grid function

Merge branch 'bugfix/use-ufl-shape' into 'master'

See merge request [extensions/dune-codegen!352]

  [extensions/dune-codegen!352]: Noneextensions/dune-codegen/merge_requests/352

Merge branch 'feature/coefficient-functions-for-systems' into 'master'

ref:extensions/dune-codegen Since DiscreteGridViewFunctions do so far not
support power or composite functions the generator stores a scalar function
for each component.

See merge request [extensions/dune-codegen!346]

  [extensions/dune-codegen!346]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/346

Merge branch 'feature/option-validation-new' into 'master'

ref:extensions/dune-codegen Note: Created a new updated branch to not loose
anything in the old one. I still need to see if everything is working.

See merge request [extensions/dune-codegen!351]

  [extensions/dune-codegen!351]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/351

Merge branch 'feature/metadata-options' into 'master'

ref:extensions/dune-codegen Some options are well suited to be set from the
metadata dictionary of UFL measures. This MR implements the necessary
infrastructure. While at it, it solves some more issues with options.

This fixes [#148]

See merge request [extensions/dune-codegen!349]

  [#148]: gitlab.dune-project.org/NoneNone/issues/148
  [extensions/dune-codegen!349]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/349


Closes #148

A pattern that we have been manually implementing in quite some places!

This is not used anymore since we have mixins.

Merge branch 'feature/loopy-invert-matrix' into 'master'

ref:extensions/dune-codegen Moves the matrix inversion stuff from
blockstructured/geometry.py to pdelab/tensor.py. This touches on the subject
of [#139].

You can get the name of the inverse of a matrix A with shape shape from

    name = name_matrix_inverse(A, shape, visitor)

matrix_inverse() returns the inverse wrapped in a pymbolic variable, although
I don't know how useful this is.

TODO:

-   [x] handle inames correctly
-   [ ] what about tags? -\> not really necessary
-   [ ] what about dependencies -\> not really necessary

See merge request [extensions/dune-codegen!295]

  [#139]: gitlab.dune-project.org/NoneNone/issues/139
  [extensions/dune-codegen!295]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/295

Merge branch 'feature/profiling' into 'master'

ref:extensions/dune-codegen I am poking through performance bottlenecks in
order to speed up code generation. This always boils down to memoization of
expensive function calls.

This fixes [#74].

See merge request [extensions/dune-codegen!348]

  [#74]: gitlab.dune-project.org/NoneNone/issues/74
  [extensions/dune-codegen!348]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/348


Closes #74

In the /sumfact_poisson_dg_3d_unstructured_deg2_symdiff_nonquadvec_gradvec
test case this reduces the time spent in evaluation of it from >100s to 6s.

Merge branch 'feature/remove-python2-support' into 'master'

See merge request [extensions/dune-codegen!347]

  [extensions/dune-codegen!347]: Noneextensions/dune-codegen/merge_requests/347

Merge branch 'feature/finite-element-implementation-selection' into 'master'

ref:extensions/dune-codegen So far, we were a bit sloppy about which basis we
choose from the UFL counterpart. This commit implements the necessary 1-to-1
mapping.

This fixes [#146]

See merge request [extensions/dune-codegen!345]

  [#146]: gitlab.dune-project.org/NoneNone/issues/146
  [extensions/dune-codegen!345]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/345


Closes #146

Merge branch 'feature/put-facedir-facemod-info-on-visitor' into 'master'

ref:extensions/dune-codegen This seems like the right thing to do with mixins
in place.

See merge request [extensions/dune-codegen!320]

  [extensions/dune-codegen!320]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/320

IT is both simplicial and quadrilateral...

Merge branch 'feature/remove-rangefield-template-parameter' into 'master'

ref:extensions/dune-codegen In many places we treat this as codegen-time
information anyway. For loopy, this is the necessary way to go.

This fixes [#149].

See merge request [extensions/dune-codegen!344]

  [#149]: gitlab.dune-project.org/NoneNone/issues/149
  [extensions/dune-codegen!344]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/344


Closes #149

So far, we were a bit sloppy about which basis we choose from the UFL
counterpart. This commit implements the necessary 1-to-1 mapping.